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Dr. Konstantinos Dimos
Department of Materials Science, University of Patras, Patras, Greece

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0 Biomaterials
0 Porous Materials
0 Carbon Nanostructures
0 molecular materials
0 2D materials and nanoparticles

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Journal article
Published: 12 December 2018 in RSC Advances
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A novel sulfur-based platelet derivative was synthesized by reacting elemental sulfur with oleyl amine.

ACS Style

Vasileios Tzitzios; Konstantinos Dimos; Ioannis Lelidis; Nikos K. Boukos; Vijay Kumar Shankarayya Wadi; Georgia Basina; George Nounesis; Saeed M. Alhassan. Sulfur–oleyl amine platelet derivatives with liquid crystalline behavior. RSC Advances 2018, 8, 41480 -41483.

AMA Style

Vasileios Tzitzios, Konstantinos Dimos, Ioannis Lelidis, Nikos K. Boukos, Vijay Kumar Shankarayya Wadi, Georgia Basina, George Nounesis, Saeed M. Alhassan. Sulfur–oleyl amine platelet derivatives with liquid crystalline behavior. RSC Advances. 2018; 8 (72):41480-41483.

Chicago/Turabian Style

Vasileios Tzitzios; Konstantinos Dimos; Ioannis Lelidis; Nikos K. Boukos; Vijay Kumar Shankarayya Wadi; Georgia Basina; George Nounesis; Saeed M. Alhassan. 2018. "Sulfur–oleyl amine platelet derivatives with liquid crystalline behavior." RSC Advances 8, no. 72: 41480-41483.

Review
Published: 27 November 2018 in Polymers
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Due to their unique properties of photoluminescence, biocompatibility, photostability, ease of preparing, and low cost, carbon dots have been studied extensively over the last decade. Soon after their discovery, it was realized that their main optical attributes may be protected, enhanced, and tuned upon proper surface passivation or functionalization. Therefore, up to date, numerous polymers have been used for these purposes, resulting to higher-quality carbon dots regarding their quantum yield or further emission-related aspects and compared to the primitive, bare ones. Hence, this review aims to clarify the polymers' role and effect on carbon dots and their features focusing on the quality characteristics of their photoluminescence upon passivation or functionalization. Given in fact the numbers of relevant publications, emphasis is given on recent articles capturing the latest advances for polymers in carbon dots for expanding emission lifetimes, advancing quantum yields, tuning emission wavelengths, enhancing specific spectral range absorption, and tailoring optoelectronic properties in general.

ACS Style

Konstantinos Dimos. Tuning Carbon Dots' Optoelectronic Properties with Polymers. Polymers 2018, 10, 1312 .

AMA Style

Konstantinos Dimos. Tuning Carbon Dots' Optoelectronic Properties with Polymers. Polymers. 2018; 10 (12):1312.

Chicago/Turabian Style

Konstantinos Dimos. 2018. "Tuning Carbon Dots' Optoelectronic Properties with Polymers." Polymers 10, no. 12: 1312.

Original research article
Published: 02 July 2018 in Frontiers in Materials
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Single and few-layers MoS2 were uniformly grown on the surface of chemically reduced graphene oxide (r-GO), via a facile liquid phase approach. The method is based on a simple functionalization of r-GO with oleyl amine which seems to affect significantly the MoS2 way of growth. Scanning-transmission-electron microscopy (STEM) analysis revealed the presence of single-layer MoS2 on the surface of a few-layers r-GO. This result was also confirmed by atomic-force microscopy (AFM) images. X-ray photoemission spectroscopy (XPS) and Raman spectroscopy were used for in-depth structural characterization. Furthermore, we have successfully applied the method to synthesize MoS2 nanocomposites with multi wall carbon nanotubes (CN) and carbon nanofibers (CNF). The results demonstrate clearly the selective MoS2 growth on both carbon-based supports.

ACS Style

Vasileios Tzitzios; Konstantinos Dimos; Saeed M. Alhassan; Rohan Mishra; Antonios Kouloumpis; Dimitrios Gournis; Nikos Boukos; Manuel A. Roldan; Juan Carlos Idrobo; Michael A. Karakassides; Georgia Basina; Yasser Al Wahedi; Hae Jin Kim; Marios S. Katsiotis; Michael Fardis; Albina Borisevich; Stephen J. Pennycook; Sokrates T. Pantelides; George Papavassiliou. Facile MoS2 Growth on Reduced Graphene-Oxide via Liquid Phase Method. Frontiers in Materials 2018, 5, 1 .

AMA Style

Vasileios Tzitzios, Konstantinos Dimos, Saeed M. Alhassan, Rohan Mishra, Antonios Kouloumpis, Dimitrios Gournis, Nikos Boukos, Manuel A. Roldan, Juan Carlos Idrobo, Michael A. Karakassides, Georgia Basina, Yasser Al Wahedi, Hae Jin Kim, Marios S. Katsiotis, Michael Fardis, Albina Borisevich, Stephen J. Pennycook, Sokrates T. Pantelides, George Papavassiliou. Facile MoS2 Growth on Reduced Graphene-Oxide via Liquid Phase Method. Frontiers in Materials. 2018; 5 ():1.

Chicago/Turabian Style

Vasileios Tzitzios; Konstantinos Dimos; Saeed M. Alhassan; Rohan Mishra; Antonios Kouloumpis; Dimitrios Gournis; Nikos Boukos; Manuel A. Roldan; Juan Carlos Idrobo; Michael A. Karakassides; Georgia Basina; Yasser Al Wahedi; Hae Jin Kim; Marios S. Katsiotis; Michael Fardis; Albina Borisevich; Stephen J. Pennycook; Sokrates T. Pantelides; George Papavassiliou. 2018. "Facile MoS2 Growth on Reduced Graphene-Oxide via Liquid Phase Method." Frontiers in Materials 5, no. : 1.

Journal article
Published: 01 September 2017 in Carbon
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ACS Style

Vasileios Tzitzios; Xiaocao Hu; Konstantinos Dimos; Dimitrios Gournis; Vasilios Georgakilas; George Avgouropoulos; Marios Katsiotis; Saeed Alhassan; George Hadjipanayis. Uniform growth of fct FePt nanoparticles on the surface of reduced-GO via a green facile approach. Ferromagnetic r-GO nanocomposites with high coercivity and surface area. Carbon 2017, 121, 209 -216.

AMA Style

Vasileios Tzitzios, Xiaocao Hu, Konstantinos Dimos, Dimitrios Gournis, Vasilios Georgakilas, George Avgouropoulos, Marios Katsiotis, Saeed Alhassan, George Hadjipanayis. Uniform growth of fct FePt nanoparticles on the surface of reduced-GO via a green facile approach. Ferromagnetic r-GO nanocomposites with high coercivity and surface area. Carbon. 2017; 121 ():209-216.

Chicago/Turabian Style

Vasileios Tzitzios; Xiaocao Hu; Konstantinos Dimos; Dimitrios Gournis; Vasilios Georgakilas; George Avgouropoulos; Marios Katsiotis; Saeed Alhassan; George Hadjipanayis. 2017. "Uniform growth of fct FePt nanoparticles on the surface of reduced-GO via a green facile approach. Ferromagnetic r-GO nanocomposites with high coercivity and surface area." Carbon 121, no. : 209-216.

Journals
Published: 22 June 2017 in Nanoscale
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Two easy approaches are successfully employed for the preparation of nitrogen-doped carbon nanodot (NCND)-clay hybrids (bulk solids and thin films). Fluorescent and small NCNDs are intercalated within the interlayer space of LAPONITE® clay with a simple ion exchange reaction in bulk or embedded between functionalized LAPONITE® sheets by combining a layer-by-layer approach with a self-assembly process. In both cases, homogeneous hybrids with 2D-ordered NCNDs (accounting for >20 wt%) are produced, with the NCND optoelectronic properties preserved. Drop casting of suspensions or self-assembly on flexible substrates allows the fabrication of luminescent flexible films. The transparency of the films is found to be adjustable either by controlling the concentration of the drop-cast suspensions or by the number of layers in the self-assembly procedure. The prepared films are stable over time: the inert LAPONITE® platelets not only guide the highly ordered 2D assemblies of NCNDs in the interlayer space but also protect them from external agents, which could affect their surfaces and thus alter their optoelectronic properties.

ACS Style

Konstantinos Dimos; Francesca Arcudi; Antonios Kouloumpis; Ioannis B. Koutselas; Petra Rudolf; Dimitrios Gournis; Maurizio Prato. Top-down and bottom-up approaches to transparent, flexible and luminescent nitrogen-doped carbon nanodot-clay hybrid films. Nanoscale 2017, 9, 10256 -10262.

AMA Style

Konstantinos Dimos, Francesca Arcudi, Antonios Kouloumpis, Ioannis B. Koutselas, Petra Rudolf, Dimitrios Gournis, Maurizio Prato. Top-down and bottom-up approaches to transparent, flexible and luminescent nitrogen-doped carbon nanodot-clay hybrid films. Nanoscale. 2017; 9 (29):10256-10262.

Chicago/Turabian Style

Konstantinos Dimos; Francesca Arcudi; Antonios Kouloumpis; Ioannis B. Koutselas; Petra Rudolf; Dimitrios Gournis; Maurizio Prato. 2017. "Top-down and bottom-up approaches to transparent, flexible and luminescent nitrogen-doped carbon nanodot-clay hybrid films." Nanoscale 9, no. 29: 10256-10262.

Research article
Published: 30 May 2017 in ACS Sustainable Chemistry & Engineering
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ACS Style

Eleni Petala; Yiannis Georgiou; Vasilis Kostas; Konstantinos Dimos; Michael A. Karakassides; Yiannis Deligiannakis; Claudia Aparicio; Jiří Tuček; Radek Zbořil. Magnetic Carbon Nanocages: An Advanced Architecture with Surface- and Morphology-Enhanced Removal Capacity for Arsenites. ACS Sustainable Chemistry & Engineering 2017, 5, 5782 -5792.

AMA Style

Eleni Petala, Yiannis Georgiou, Vasilis Kostas, Konstantinos Dimos, Michael A. Karakassides, Yiannis Deligiannakis, Claudia Aparicio, Jiří Tuček, Radek Zbořil. Magnetic Carbon Nanocages: An Advanced Architecture with Surface- and Morphology-Enhanced Removal Capacity for Arsenites. ACS Sustainable Chemistry & Engineering. 2017; 5 (7):5782-5792.

Chicago/Turabian Style

Eleni Petala; Yiannis Georgiou; Vasilis Kostas; Konstantinos Dimos; Michael A. Karakassides; Yiannis Deligiannakis; Claudia Aparicio; Jiří Tuček; Radek Zbořil. 2017. "Magnetic Carbon Nanocages: An Advanced Architecture with Surface- and Morphology-Enhanced Removal Capacity for Arsenites." ACS Sustainable Chemistry & Engineering 5, no. 7: 5782-5792.

Research article
Published: 16 May 2017 in ACS Omega
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The special electronic, optical, thermal, and mechanical properties of graphene resulting from its 2D nature, as well as the ease of functionalizing it through a simple acid treatment, make graphene an ideal building block for the development of new hybrid nanostructures with well-defined dimensions and behavior. Such hybrids have great potential as active materials in applications such as gas storage, gas/liquid separation, photocatalysis, bioimaging, optoelectronics, and nanosensing. In this study, luminescent carbon dots (C-dots) were sandwiched between oxidized graphene sheets to form novel hybrid multilayer films. Our thin-film preparation approach combines self-assembly with the Langmuir–Schaefer deposition and uses graphene oxide nanosheets as template for grafting C-dots in a bidimensional array. Repeating the cycle results in a facile and low-cost layer-by-layer procedure for the formation of highly ordered hybrid multilayers, which were characterized by photoluminescence, UV–visible, X-ray photoelectron, and Raman spectroscopies, as well as X-ray diffraction and atomic force microscopy.

ACS Style

Antonios Kouloumpis; Eleni Thomou; Nikolaos Chalmpes; Konstantinos Dimos; Konstantinos Spyrou; Athanasios B. Bourlinos; Ioannis Koutselas; Dimitrios Gournis; Petra Rudolf. Graphene/Carbon Dot Hybrid Thin Films Prepared by a Modified Langmuir–Schaefer Method. ACS Omega 2017, 2, 2090 -2099.

AMA Style

Antonios Kouloumpis, Eleni Thomou, Nikolaos Chalmpes, Konstantinos Dimos, Konstantinos Spyrou, Athanasios B. Bourlinos, Ioannis Koutselas, Dimitrios Gournis, Petra Rudolf. Graphene/Carbon Dot Hybrid Thin Films Prepared by a Modified Langmuir–Schaefer Method. ACS Omega. 2017; 2 (5):2090-2099.

Chicago/Turabian Style

Antonios Kouloumpis; Eleni Thomou; Nikolaos Chalmpes; Konstantinos Dimos; Konstantinos Spyrou; Athanasios B. Bourlinos; Ioannis Koutselas; Dimitrios Gournis; Petra Rudolf. 2017. "Graphene/Carbon Dot Hybrid Thin Films Prepared by a Modified Langmuir–Schaefer Method." ACS Omega 2, no. 5: 2090-2099.

Research article
Published: 22 March 2017 in The Journal of Physical Chemistry C
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A microporous polymeric organic framework (POF) based on phloroglucinol (phlo-POF) was for the first time evaluated on photoreduction and removal processes of hexavalent chromium (Cr6+) from aqueous solutions. The phlo-POF synthesis was based on reaction of phloroglucinol and terephthalaldehyde under hydrothermal conditions. Structural and chemical characterization was performed using UV–vis–NIR diffuse reflectance spectroscopy (DRS), FT-infrared spectroscopy, and thermogravimetric methods, while surface area analysis was employed to determine other physical and surface properties. Batch experiments were conducted on contaminated water to determine the rate and extent of Cr6+ removal and its immobilization by the phlo-POF material. The kinetic studies showed a rapid removal of Cr6+ ions from the water in the presence of the phlo-POF, best described by the zero-order kinetic model. The efficiency of the material with UV–C irradiation on Cr6+ reduction was compared with a well-studied material, the Degussa P-25 TiO2 catalyst, and found to be ∼200% higher. Cycle experiments verify the successful reuse of the phlo-POF photocatalyst for at least ten times for Cr6+ reduction.

ACS Style

Vasilios Kostas; Maria Baikousi; Konstantinos Dimos; Konstantinos C. Vasilopoulos; Ioannis Koutselas; Michael A. Karakassides. Efficient and Rapid Photocatalytic Reduction of Hexavalent Chromium Achieved by a Phloroglucinol-Derived Microporous Polymeric Organic Framework Solid. The Journal of Physical Chemistry C 2017, 121, 7303 -7311.

AMA Style

Vasilios Kostas, Maria Baikousi, Konstantinos Dimos, Konstantinos C. Vasilopoulos, Ioannis Koutselas, Michael A. Karakassides. Efficient and Rapid Photocatalytic Reduction of Hexavalent Chromium Achieved by a Phloroglucinol-Derived Microporous Polymeric Organic Framework Solid. The Journal of Physical Chemistry C. 2017; 121 (13):7303-7311.

Chicago/Turabian Style

Vasilios Kostas; Maria Baikousi; Konstantinos Dimos; Konstantinos C. Vasilopoulos; Ioannis Koutselas; Michael A. Karakassides. 2017. "Efficient and Rapid Photocatalytic Reduction of Hexavalent Chromium Achieved by a Phloroglucinol-Derived Microporous Polymeric Organic Framework Solid." The Journal of Physical Chemistry C 121, no. 13: 7303-7311.

Journal article
Published: 01 February 2017 in Journal of Colloid and Interface Science
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We report the production of hierarchical all graphitic structures through a systematic study involving the use of wet chemical treatments for dip coating of carbon fibers (CFs) for surface grafting with multiwalled carbon nanotubes (CNTs). Realization of a thin homogeneous veil of CNTs onto the CF surface was achieved through an extensive parametric survey. Optimization of aqueous dispersions of CNTs eliminated the need for oxidation of the CF surface. The effects of chemical processes onto the surface and structural characteristics of the involved graphitic species were evaluated via thermogravimetric analysis, and X-ray photoelectron, infrared and Raman spectroscopies. The dielectric properties of the produced CNT aqueous dispersions were monitored via electrochemical impedance spectroscopy. A final assessment of the produced hierarchical CFs was performed through scanning electron microscopy.

ACS Style

Kyriaki Tsirka; Georgios Foteinidis; Konstantinos Dimos; Lazaros Tzounis; Dimitrios Gournis; Alkiviadis S. Paipetis. Production of hierarchical all graphitic structures: A systematic study. Journal of Colloid and Interface Science 2017, 487, 444 -457.

AMA Style

Kyriaki Tsirka, Georgios Foteinidis, Konstantinos Dimos, Lazaros Tzounis, Dimitrios Gournis, Alkiviadis S. Paipetis. Production of hierarchical all graphitic structures: A systematic study. Journal of Colloid and Interface Science. 2017; 487 ():444-457.

Chicago/Turabian Style

Kyriaki Tsirka; Georgios Foteinidis; Konstantinos Dimos; Lazaros Tzounis; Dimitrios Gournis; Alkiviadis S. Paipetis. 2017. "Production of hierarchical all graphitic structures: A systematic study." Journal of Colloid and Interface Science 487, no. : 444-457.

Journal article
Published: 01 December 2016 in Carbon
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ACS Style

Vasilios Georgakilas; Athanasios B. Bourlinos; Evangelos Ntararas; Armando Ibraliu; Dimitrios Gournis; Konstantinos Dimos; Antonios Kouloumpis; Radek Zboril. Graphene nanobuds: Synthesis and selective organic derivatisation. Carbon 2016, 110, 51 -55.

AMA Style

Vasilios Georgakilas, Athanasios B. Bourlinos, Evangelos Ntararas, Armando Ibraliu, Dimitrios Gournis, Konstantinos Dimos, Antonios Kouloumpis, Radek Zboril. Graphene nanobuds: Synthesis and selective organic derivatisation. Carbon. 2016; 110 ():51-55.

Chicago/Turabian Style

Vasilios Georgakilas; Athanasios B. Bourlinos; Evangelos Ntararas; Armando Ibraliu; Dimitrios Gournis; Konstantinos Dimos; Antonios Kouloumpis; Radek Zboril. 2016. "Graphene nanobuds: Synthesis and selective organic derivatisation." Carbon 110, no. : 51-55.

Journal article
Published: 09 May 2016 in Journal of Materials Chemistry A
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In this study, hybrid mesoporous organosilicas (HMOs) were synthesized by using tetraethyl orthosilicate (TEOS) as the silica source and 1,4-bis(triethoxysilyl)benzene (BTB) in various ratios of BTB to TEOS. In this study, hybrid mesoporous organosilicas (HMOs) were synthesized by using tetraethyl orthosilicate (TEOS) as the silica source and 1,4-bis(triethoxysilyl)benzene (BTB) in various ratios of BTB to TEOS. The two extreme cases of 0 and 100 mol% BTB were compared with the partial addition of BTB (25 mol%) and the partial absence of TEOS (75 mol% BTB). The synthesized mesoporous materials were characterized by means of powder X-ray diffraction (PXD), scanning electron microscopy (SEM) and helium pycnometry for the determination of skeletal density. The Brunauer–Emmett–Teller (BET) method was used for the determination of the specific surface area (SSA) and non-local density functional theory (NLDFT) calculations were employed for the determination of the pore size distribution (PSD). The hydrogen and methane sorption properties were investigated using a Sieverts apparatus under isothermal sorption equilibrium conditions at cryogenic and close to ambient temperatures, respectively. For hydrogen, the combination of phenyl rings with pores at the micro/mesopore border resulted in an increase in sorption capacity. The simultaneous presence of two different precursors increased the surface inhomogeneity, which led to a wider distribution of adsorption sites close to the micro/mesopore border, which favored the hydrogen sorption properties. The presence of the phenyl rings doubled the number of methane molecules that the material surface could accommodate. The partial substitution of TEOS by BTB (25 mol%) gave the same density of adsorbed methane as the non-hybrid material, which consisted of 100% BTB. The materials exhibited excellent reversibility and sorption stability upon aging. Their sorption performance was evaluated using the Tóth model and was correlated with their structural characteristics. The fraction of micropores among the total number of pores was quantitatively correlated with the maximum storage capacity and the adsorbate–adsorbent interaction strength. Finally, for a low coverage of methane the enthalpy of adsorption was calculated by the Clausius–Clapeyron equation.

ACS Style

Georgios N. Kalantzopoulos; Myrsini K. Antoniou; Apostolos Enotiadis; Konstantinos Dimos; Enrico Maccallini; Alfonso Policicchio; Elio Colavita; Raffaele Giuseppe Agostino. Enhanced hydrogen and methane storage of hybrid mesoporous organosilicas. Journal of Materials Chemistry A 2016, 4, 9275 -9285.

AMA Style

Georgios N. Kalantzopoulos, Myrsini K. Antoniou, Apostolos Enotiadis, Konstantinos Dimos, Enrico Maccallini, Alfonso Policicchio, Elio Colavita, Raffaele Giuseppe Agostino. Enhanced hydrogen and methane storage of hybrid mesoporous organosilicas. Journal of Materials Chemistry A. 2016; 4 (23):9275-9285.

Chicago/Turabian Style

Georgios N. Kalantzopoulos; Myrsini K. Antoniou; Apostolos Enotiadis; Konstantinos Dimos; Enrico Maccallini; Alfonso Policicchio; Elio Colavita; Raffaele Giuseppe Agostino. 2016. "Enhanced hydrogen and methane storage of hybrid mesoporous organosilicas." Journal of Materials Chemistry A 4, no. 23: 9275-9285.

Journal article
Published: 01 March 2016 in Carbon
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ACS Style

D. Giasafaki; Georgia Charalambopoulou; Ch. Tampaxis; K. Dimos; Dimitrios Gournis; A. Stubos; Theodore Steriotis. Comparing hydrogen sorption in different Pd-doped pristine and surface-modified nanoporous carbons. Carbon 2016, 98, 1 -14.

AMA Style

D. Giasafaki, Georgia Charalambopoulou, Ch. Tampaxis, K. Dimos, Dimitrios Gournis, A. Stubos, Theodore Steriotis. Comparing hydrogen sorption in different Pd-doped pristine and surface-modified nanoporous carbons. Carbon. 2016; 98 ():1-14.

Chicago/Turabian Style

D. Giasafaki; Georgia Charalambopoulou; Ch. Tampaxis; K. Dimos; Dimitrios Gournis; A. Stubos; Theodore Steriotis. 2016. "Comparing hydrogen sorption in different Pd-doped pristine and surface-modified nanoporous carbons." Carbon 98, no. : 1-14.

Journal article
Published: 01 March 2016 in International Journal of Biological Macromolecules
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In this study we report the ability of reduced and non-reduced graphene oxide-based nanomaterials (GONs), modified with variable alkyl chain length and terminal functional groups, to act as effective scaffolds for the immobilization of cytochrome c (cyt c) using different immobilization procedures. The GONs/cyt c conjugates are characterized by a combination of techniques, namely atomic force microscopy, X-ray photoelectron and FT-IR spectroscopies as well as thermo-gravimetric and differential thermal analysis. The effect of the structure of functional groups and the surface chemistry of GONs on the immobilization efficiency, the peroxidase activity and the stability of the cyt c was investigated and correlated with conformational changes on the protein molecule upon immobilization. The enhanced thermal stability (up to 2-fold) and increased tolerance (up to 25-fold) against denaturing agents observed for immobilized cyt c, indicates that these functionalized GONs are suitable as nanoscaffolds for the development of robust nanobiocatalysts.

ACS Style

Michaela Patila; Ioannis V. Pavlidis; Antonios Kouloumpis; Konstantinos Dimos; Konstantinos Spyrou; Petros Katapodis; Dimitrios Gournis; Haralambos Stamatis. Graphene oxide derivatives with variable alkyl chain length and terminal functional groups as supports for stabilization of cytochrome c. International Journal of Biological Macromolecules 2016, 84, 227 -235.

AMA Style

Michaela Patila, Ioannis V. Pavlidis, Antonios Kouloumpis, Konstantinos Dimos, Konstantinos Spyrou, Petros Katapodis, Dimitrios Gournis, Haralambos Stamatis. Graphene oxide derivatives with variable alkyl chain length and terminal functional groups as supports for stabilization of cytochrome c. International Journal of Biological Macromolecules. 2016; 84 ():227-235.

Chicago/Turabian Style

Michaela Patila; Ioannis V. Pavlidis; Antonios Kouloumpis; Konstantinos Dimos; Konstantinos Spyrou; Petros Katapodis; Dimitrios Gournis; Haralambos Stamatis. 2016. "Graphene oxide derivatives with variable alkyl chain length and terminal functional groups as supports for stabilization of cytochrome c." International Journal of Biological Macromolecules 84, no. : 227-235.

Journals
Published: 16 February 2016 in New Journal of Chemistry
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The use of graphene oxide flakes functionalized with 3-amino-1-propanesulfonic acid (GOSULF), as a powder or incorporated into a Nafion membrane, for the removal of cationic and anionic dyes is studied.

ACS Style

Silvia Scalese; Isabella Nicotera; Daniele D'Angelo; Simona Filice; Sebania Libertino; Cataldo Simari; Konstantinos Dimos; Vittorio Privitera. Cationic and anionic azo-dye removal from water by sulfonated graphene oxide nanosheets in Nafion membranes. New Journal of Chemistry 2016, 40, 3654 -3663.

AMA Style

Silvia Scalese, Isabella Nicotera, Daniele D'Angelo, Simona Filice, Sebania Libertino, Cataldo Simari, Konstantinos Dimos, Vittorio Privitera. Cationic and anionic azo-dye removal from water by sulfonated graphene oxide nanosheets in Nafion membranes. New Journal of Chemistry. 2016; 40 (4):3654-3663.

Chicago/Turabian Style

Silvia Scalese; Isabella Nicotera; Daniele D'Angelo; Simona Filice; Sebania Libertino; Cataldo Simari; Konstantinos Dimos; Vittorio Privitera. 2016. "Cationic and anionic azo-dye removal from water by sulfonated graphene oxide nanosheets in Nafion membranes." New Journal of Chemistry 40, no. 4: 3654-3663.

Journal article
Published: 02 February 2016 in Journal of Sol-Gel Science and Technology
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Calcium oxyboroapatite with bimodal porosity and proposed general formula (CaO) x (PO2.5) y (BO1.5) z with 10 ≥ x ≥ 9, y ≥ 4 and z ≥ 1.6 have been prepared for the first time, by thermal processing of sol–gel-derived glass. F-127 triblock copolymer was incorporated in the sol–gel reactions as the structure directing agent under acidic conditions, whereas tributyl borate, triethyl phosphate and calcium nitrate were used as precursors for the glass structure. The prepared materials were chemically analyzed and characterized by X-ray diffraction (XRD), infrared absorption and Raman scattering spectroscopic techniques, where the related XRD patterns clearly revealed growth of rich in boron oxyboroapatite phase with increasing temperature. The oxyboroapatite phases treated at high temperatures exhibited bioactivity after soaking in simulated body fluid (SBF) solution within a few hours and these were observed by μ-Raman and scanning electron microscopy (SEM). Moreover, the external morphology of these materials has been directly observed with SEM microscopy before and after the immersion in SBF. Furthermore, mercury intrusion porosity measurements were taken in order to investigate the porosity, showing bimodal meso- and macro-porosity.

ACS Style

Anastasia Vassilakopoulou; Konstantinos Dimos; Vasilis Kostas; Michael A. Karakassides; Ioannis Koutselas. Synthesis and characterization of calcium oxyboroapatite with bimodal porosity. Journal of Sol-Gel Science and Technology 2016, 78, 339 -346.

AMA Style

Anastasia Vassilakopoulou, Konstantinos Dimos, Vasilis Kostas, Michael A. Karakassides, Ioannis Koutselas. Synthesis and characterization of calcium oxyboroapatite with bimodal porosity. Journal of Sol-Gel Science and Technology. 2016; 78 (2):339-346.

Chicago/Turabian Style

Anastasia Vassilakopoulou; Konstantinos Dimos; Vasilis Kostas; Michael A. Karakassides; Ioannis Koutselas. 2016. "Synthesis and characterization of calcium oxyboroapatite with bimodal porosity." Journal of Sol-Gel Science and Technology 78, no. 2: 339-346.

Journal article
Published: 01 February 2016 in Current Organic Chemistry
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This review deals with the promising newest carbon-based nanomaterial; Carbon Quantum Dots (CQDs). CQDs demonstrate optoelectronic properties comparable to conventional inorganic semiconductors, however are environmental friendly and benign. They possess complicated structures, particle sizes up to 10 nm and upon surface passivation and/or functionalization their optoelectronic properties are critically improved and tuned. Although there are a few recent reviews on this topic, the majority of them emphasize on CQDs applications or even the synthetic procedures followed to acquire CQDs. In contrary, this review refers in brief to the aforementioned and focuses on the surface passivation and functionalization routes and therefore the functional groups and heteroatoms used for the development of high quality CQDs. Introduction and doping with appropriate heteroatoms is the key point to tailor made features of CQDs and thus organic chemistry provides the vital background for the essential functionalizations.

ACS Style

Konstantinos Dimos. Carbon Quantum Dots: Surface Passivation and Functionalization. Current Organic Chemistry 2016, 20, 682 -695.

AMA Style

Konstantinos Dimos. Carbon Quantum Dots: Surface Passivation and Functionalization. Current Organic Chemistry. 2016; 20 (6):682-695.

Chicago/Turabian Style

Konstantinos Dimos. 2016. "Carbon Quantum Dots: Surface Passivation and Functionalization." Current Organic Chemistry 20, no. 6: 682-695.

Journals
Published: 01 January 2016 in Nanoscale
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The broadband nonlinear absorption increases with less oxidized/reduced graphene oxides, while the Curie temperature and magnetic response in the ferromagnetic state increases with the degree of oxidation.

ACS Style

Nikos Liaros; Jiri Tucek; Konstantinos Dimos; Aristides Bakandritsos; Konstantinos S. Andrikopoulos; Dimitrios Gournis; Radek Zboril; Stelios Couris. The effect of the degree of oxidation on broadband nonlinear absorption and ferromagnetic ordering in graphene oxide. Nanoscale 2016, 8, 2908 -2917.

AMA Style

Nikos Liaros, Jiri Tucek, Konstantinos Dimos, Aristides Bakandritsos, Konstantinos S. Andrikopoulos, Dimitrios Gournis, Radek Zboril, Stelios Couris. The effect of the degree of oxidation on broadband nonlinear absorption and ferromagnetic ordering in graphene oxide. Nanoscale. 2016; 8 (5):2908-2917.

Chicago/Turabian Style

Nikos Liaros; Jiri Tucek; Konstantinos Dimos; Aristides Bakandritsos; Konstantinos S. Andrikopoulos; Dimitrios Gournis; Radek Zboril; Stelios Couris. 2016. "The effect of the degree of oxidation on broadband nonlinear absorption and ferromagnetic ordering in graphene oxide." Nanoscale 8, no. 5: 2908-2917.

Journal article
Published: 01 December 2015 in Chemical Engineering Journal
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Yiannis Georgiou; Konstantinos Dimos; Konstantinos Beltsios; Michael A. Karakassides; Yiannis Deligiannakis. Hybrid [polysulfone–Zero Valent Iron] membranes: Synthesis, characterization and application for AsIII remediation. Chemical Engineering Journal 2015, 281, 651 -660.

AMA Style

Yiannis Georgiou, Konstantinos Dimos, Konstantinos Beltsios, Michael A. Karakassides, Yiannis Deligiannakis. Hybrid [polysulfone–Zero Valent Iron] membranes: Synthesis, characterization and application for AsIII remediation. Chemical Engineering Journal. 2015; 281 ():651-660.

Chicago/Turabian Style

Yiannis Georgiou; Konstantinos Dimos; Konstantinos Beltsios; Michael A. Karakassides; Yiannis Deligiannakis. 2015. "Hybrid [polysulfone–Zero Valent Iron] membranes: Synthesis, characterization and application for AsIII remediation." Chemical Engineering Journal 281, no. : 651-660.

Journal article
Published: 01 October 2015 in Journal of Colloid and Interface Science
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Novel nanohybrid materials were prepared by covalent grafting of a polyphenolic polymer [Humic Acid Like Polycondensate (HALP)] on SiO2 nanoparticles. Four nanohybrids were so-produced, using four different types of SiO2 i.e. three Aerosil flame-made nanoparticles with nominal specific surface area of 50, 90 and 300 m(2)/g, herein codenamed OX50, A90, A300 respectively, plus a colloidal SiO2[S300] with SSA=300 m(2)/g. The antioxidant activity of the SiO2-HALP nanohybrids was evaluated by assessing their kinetics for Hydrogen Atom Transfer [HAT] to DPPH radicals. When normalized per same HALP concentration, bigger NPs SiO2[OX50]-HALP NPs can scavenge 280 μmoles of DPPH radicals per gram of HALP, while [A90]-HALP and [A300]-HALP NPs can scavenge 514 and 832 μmoles of DPPH radicals per gram of HALP, respectively. The colloidal SiO2[S300]-HALP can scavenge fewer DPPH radicals (252 μmoles) per gram of HALP. Based on detailed kinetic data it is shown that (i) surface grafted HALPs perform 300% better HAT than non-grafted HALP in solution. (ii) By controlling the particle type and grafting-loading, we can control/optimize the HAT performance: when grafted on the appropriate SiO2 surface the HALP macromolecules are able to quench up to 0.8 mmoles of DPPH-radical per gram of HALP.

ACS Style

Eleni Bletsa; Panagiota Stathi; Konstantinos Dimos; Maria Louloudi; Yiannis Deligiannakis. Interfacial Hydrogen Atom Transfer by nanohybrids based on Humic Acid Like Polycondensates. Journal of Colloid and Interface Science 2015, 455, 163 -171.

AMA Style

Eleni Bletsa, Panagiota Stathi, Konstantinos Dimos, Maria Louloudi, Yiannis Deligiannakis. Interfacial Hydrogen Atom Transfer by nanohybrids based on Humic Acid Like Polycondensates. Journal of Colloid and Interface Science. 2015; 455 ():163-171.

Chicago/Turabian Style

Eleni Bletsa; Panagiota Stathi; Konstantinos Dimos; Maria Louloudi; Yiannis Deligiannakis. 2015. "Interfacial Hydrogen Atom Transfer by nanohybrids based on Humic Acid Like Polycondensates." Journal of Colloid and Interface Science 455, no. : 163-171.

Journal article
Published: 04 September 2015 in RSC Advances
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The self-assembly process in a solution of a mononuclear iron(II) complex based on the bispyrazolylpyridine scaffold with graphene oxide (GO) micrometer-sheets allows not only the devising of a new hybrid-architecture for GO-based materials suitable for nanomedicine, but also the unveiling of the reactive nature of GO as a drug-carrier. The neat iron complex is found to be highly active in disrupting the cell cycle through DNA binding, with behaviour and efficiency similar to that expressed by ruthenium-complexes as well as antibiotic-drugs such as doxorubicin. On the contrary, in the hybrid material the proclivity of neat GO to produce reactive oxygen species (ROS) became down-regulated by the electron-buffering properties of the loaded iron complex, evidencing the presence of an active electron transfer from the drug to GO. These findings question the use of the neat GO platform as a suitable carrier for metal-based anticancer drugs and highlight the importance of addressing the chemical/physical integrity of the drug being loaded into GO before drawing conclusions on the potential effectiveness of the hybrid material for medical applications.

ACS Style

Audrey Mokdad; Konstantinos Dimos; Giorgio Zoppellaro; Jiri Tucek; Jason A. Perman; Ondrej Malina; K. Kristoffer Andersson; Kasibhatta Kumara Ramanatha Datta; Jens Peter Froning; Radek Zboril. The non-innocent nature of graphene oxide as a theranostic platform for biomedical applications and its reactivity towards metal-based anticancer drugs. RSC Advances 2015, 5, 76556 -76566.

AMA Style

Audrey Mokdad, Konstantinos Dimos, Giorgio Zoppellaro, Jiri Tucek, Jason A. Perman, Ondrej Malina, K. Kristoffer Andersson, Kasibhatta Kumara Ramanatha Datta, Jens Peter Froning, Radek Zboril. The non-innocent nature of graphene oxide as a theranostic platform for biomedical applications and its reactivity towards metal-based anticancer drugs. RSC Advances. 2015; 5 (93):76556-76566.

Chicago/Turabian Style

Audrey Mokdad; Konstantinos Dimos; Giorgio Zoppellaro; Jiri Tucek; Jason A. Perman; Ondrej Malina; K. Kristoffer Andersson; Kasibhatta Kumara Ramanatha Datta; Jens Peter Froning; Radek Zboril. 2015. "The non-innocent nature of graphene oxide as a theranostic platform for biomedical applications and its reactivity towards metal-based anticancer drugs." RSC Advances 5, no. 93: 76556-76566.