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The current work proposed the application of methylammonium lead iodide (MAPbI3) perovskite microrods toward photo resistor switches. A metal-semiconductor-metal (MSM) configuration with a structure of silver-MAPbI3(rods)-silver (Ag/MAPbI3/Ag) based photo-resistor was fabricated. The MAPbI3 microrods were prepared by adopting a facile low-temperature solution process, and then an independent MAPbI3 microrod was employed to the two-terminal device. The morphological and elemental compositional studies of the fabricated MAPbI3 microrods were performed using FESEM and EDS, respectively. The voltage-dependent electrical behavior and electronic conduction mechanisms of the fabricated photo-resistors were studied using current–voltage (I–V) characteristics. Different conduction mechanisms were observed at different voltage ranges in dark and under illumination. In dark conditions, the conduction behavior was dominated by typical trap-controlled charge transport mechanisms within the investigated voltage range. However, under illumination, the carrier transport is dominated by the current photogenerated mechanism. This study could extend the promising application of perovskite microrods in photo-induced resistor switches and beyond.
Ehsan Raza; Fakhra Aziz; Arti Mishra; Noora Al-Thani; Zubair Ahmad. MAPbI3 Microrods-Based Photo Resistor Switches: Fabrication and Electrical Characterization. Materials 2021, 14, 4385 .
AMA StyleEhsan Raza, Fakhra Aziz, Arti Mishra, Noora Al-Thani, Zubair Ahmad. MAPbI3 Microrods-Based Photo Resistor Switches: Fabrication and Electrical Characterization. Materials. 2021; 14 (16):4385.
Chicago/Turabian StyleEhsan Raza; Fakhra Aziz; Arti Mishra; Noora Al-Thani; Zubair Ahmad. 2021. "MAPbI3 Microrods-Based Photo Resistor Switches: Fabrication and Electrical Characterization." Materials 14, no. 16: 4385.
Metals, including austenitic steels and alloys, have been extensively applied in industrial and engineering applications. Passive films on metal surfaces are very important for corrosion protection. However, localized attack, such as passive film breakdown and the initiation of pits, is found upon exposure of such metals to aggressive ion-containing environments, leading to material failure and prominent adverse economic and safety concerns. For several decades, the mechanism of passivity breakdown and pit nucleation during pitting corrosion has been widely studied. The present article provides a detailed review of passive film breakdown on metal surfaces and the effects of complicated conditions, such as chloride- and sulfide-ion concentrations, temperature, and solution pH, on passivity breakdown. The possible mechanism for passivity breakdown is reviewed and discussed. The composition, structure, and electronic properties of passive layers are of conclusive importance to understand the leading corrosion mechanism, and they have been investigated with different techniques. Furthermore, we aim to present the structure, chemical composition, and electronic properties of passive films on metal surfaces by using X-ray photoelectron spectroscopy and energy-dispersive spectroscopy. Additionally, the surface morphology of passive films is analyzed by scanning electron microscopy (SEM), transmission electron microscopy (TEM), and atomic force microscopy (AFM) techniques. Finally, the effect of chloride- and sulfide-ion concentrations, pH, and temperature on passivity breakdown is discussed in detail.
Hemalatha Parangusan; Jolly Bhadra; Noora Al-Thani. A review of passivity breakdown on metal surfaces: influence of chloride- and sulfide-ion concentrations, temperature, and pH. Emergent Materials 2021, 1 -17.
AMA StyleHemalatha Parangusan, Jolly Bhadra, Noora Al-Thani. A review of passivity breakdown on metal surfaces: influence of chloride- and sulfide-ion concentrations, temperature, and pH. Emergent Materials. 2021; ():1-17.
Chicago/Turabian StyleHemalatha Parangusan; Jolly Bhadra; Noora Al-Thani. 2021. "A review of passivity breakdown on metal surfaces: influence of chloride- and sulfide-ion concentrations, temperature, and pH." Emergent Materials , no. : 1-17.
Sports has the potential to integrate with different scientific subjects, including materials science and engineering, making it an ideal approach to enhance the students’ affinity toward sustainable education in science, technology, engineering, and mathematics (STEM). Amid gradual educational reformations in the state of Qatar, a distinctive STEM program titled, “Science in Sports” (SIS) was launched to investigate STEM integrated learning in secondary school students. The participant students, 248 students (112 females and 136 males) from 15 different government-operated (public) secondary schools, from rural and urban areas, were given STEM workshops on one of the sports materials, during this pilot study, resultantly challenging them to engineer a sports product. The study employed a mixed-method study in which quantitative approaches were applied to analyze the program effectiveness, with a t-test statistical analysis performed over data collected from a period of five continuous years from 2012 to 2017 in five different cycles. A more dominant data collection included pre and post surveys, substantiating observations of the program facilitator and their schoolteachers were included in this research and development (R&D) study to review the student learning behavior for a qualitative approach. Moreover, the results of the strength, weakness, opportunities, and threats (SWOT) analysis provided an overview of the program’s effectiveness in implicating the engagement of the students in exhibiting their prototypical skills in engineering sports products along with STEM literacy. Apart from understanding the scientific concepts/principles applied in simple sports applications, student attitudes toward STEM fields augmented, as witnessed by the student productivity.
Ruba Ali; Jolly Bhadra; Nitha Siby; Zubair Ahmad; Noora Al-Thani. A STEM Model to Engage Students in Sustainable Science Education through Sports: A Case Study in Qatar. Sustainability 2021, 13, 3483 .
AMA StyleRuba Ali, Jolly Bhadra, Nitha Siby, Zubair Ahmad, Noora Al-Thani. A STEM Model to Engage Students in Sustainable Science Education through Sports: A Case Study in Qatar. Sustainability. 2021; 13 (6):3483.
Chicago/Turabian StyleRuba Ali; Jolly Bhadra; Nitha Siby; Zubair Ahmad; Noora Al-Thani. 2021. "A STEM Model to Engage Students in Sustainable Science Education through Sports: A Case Study in Qatar." Sustainability 13, no. 6: 3483.
An unprecedented turn in educational pedagogies due to the COVID-19 pandemic has significantly affected the students’ learning process worldwide. This article describes developing a STEM-based online course during the schools’ closure in the COVID-19 epidemic to combat the virtual science classroom’s limitations that could promise an active STEM learning environment. This learning model of the online STEM-based course successfully developed and exercised on 38 primary–preparatory students helped them to overcome the decline in their learning productivity. Various digital learning resources, including PowerPoint presentations, videos, online simulations, interactive quizzes, and innovative games, were implemented as instructional tools to achieve the respective content objectives. A feedback mechanism methodology was executed to improve online instructional delivery and project learners’ role in a student-centered approach, thereby aiding in the course content’s qualitative assessment. The students’ learning behavior provided concrete insights into the program’s positive outcomes, witnessing minimal student withdrawals and maximum completed assignments. Conclusions had been drawn from the course assessment (by incorporating both synchronous and asynchronous means), student feedback, and SWOT analysis to evaluate the course’s effectiveness.
Azza Abouhashem; Rana Abdou; Jolly Bhadra; Nitha Siby; Zubair Ahmad; Noora Al-Thani. COVID-19 Inspired a STEM-Based Virtual Learning Model for Middle Schools—A Case Study of Qatar. Sustainability 2021, 13, 2799 .
AMA StyleAzza Abouhashem, Rana Abdou, Jolly Bhadra, Nitha Siby, Zubair Ahmad, Noora Al-Thani. COVID-19 Inspired a STEM-Based Virtual Learning Model for Middle Schools—A Case Study of Qatar. Sustainability. 2021; 13 (5):2799.
Chicago/Turabian StyleAzza Abouhashem; Rana Abdou; Jolly Bhadra; Nitha Siby; Zubair Ahmad; Noora Al-Thani. 2021. "COVID-19 Inspired a STEM-Based Virtual Learning Model for Middle Schools—A Case Study of Qatar." Sustainability 13, no. 5: 2799.
Over the past decade, piezoelectric nanogenerator have attracted much attention to harvest mechanical energy from abundant resources in nature. Here, the ZnS microspheres is prepared by hydrothermal method and core-shell structured PANI/ZnS microspheres are synthesized by in situ polymerization method and then used as filler for the preparation of flexible [P(VDF-HFP)] based piezoelectric nanogenerator. The flexible P(VDF-HFP)/PANI-ZnS piezoelectric nanogenerator is prepared by Electrospinning technique. The core-shell PANI/ZnS composite improves the content of electroactive phase in [P(VDF-HFP)] and significantly improves the interfacial polarization between the PANI/ZnS particles and polymer matrix. Among all the samples, [P(VDF-HFP)]/2 wt% PANI-ZnS composite nanofibers exhibited the high piezoelectric peak-to-peak output voltage of 3 V compared with the neat [P(VDF-HFP)] (~ 120 mV). In addition, the high dielectric constant is observed for the [P(VDF-HFP)]/2 wt% PANI-ZnS composite nanofibers. These results implies that the fabricated flexible and efficient piezoelectric nanogenerator can be utilized for energy harvesting system.
Hemalatha Parangusan; Jolly Bhadra; Noora Al-Thani. Flexible piezoelectric nanogenerator based on [P(VDF-HFP)]/ PANI-ZnS electrospun nanofibers for electrical energy harvesting. Journal of Materials Science: Materials in Electronics 2021, 32, 6358 -6368.
AMA StyleHemalatha Parangusan, Jolly Bhadra, Noora Al-Thani. Flexible piezoelectric nanogenerator based on [P(VDF-HFP)]/ PANI-ZnS electrospun nanofibers for electrical energy harvesting. Journal of Materials Science: Materials in Electronics. 2021; 32 (5):6358-6368.
Chicago/Turabian StyleHemalatha Parangusan; Jolly Bhadra; Noora Al-Thani. 2021. "Flexible piezoelectric nanogenerator based on [P(VDF-HFP)]/ PANI-ZnS electrospun nanofibers for electrical energy harvesting." Journal of Materials Science: Materials in Electronics 32, no. 5: 6358-6368.
Despite the remarkable progress in perovskite solar cells (PSCs), their instability and rapid degradation over time still restrict their commercialization. A 2D capping layer has been proved to overcome the stability issues; however, an in-depth understanding of the complex degradation processes over a prolonged time at PSC interfaces is crucial for improving their stability. In the current work, we investigated the stability of a triple cation 3D ([(FA0.83MA0.17)Cs0.05]Pb(I0.83Br0.17)3) and 2D/3D PSC fabricated by a layer-by-layer deposition technique (PEAI-based 2D layer over triple cation 3D perovskite) using a state-of-art characterization technique: electrochemical impedance spectroscopy (EIS). A long-term stability test over 24 months was performed on the 3D and 2D/3D PSCs with an initial PCE of 18.87% and 20.21%, respectively, to suggest a more practical scenario. The current-voltage (J-V) and EIS results showed degradation in both the solar cell types; however, a slower degradation rate was observed in 2D/3D PSCs. Finally, the quantitative analysis of the key EIS parameters affected by the degradation in 3D and 2D/3D PSCs were discussed.
Sumayya M. Abdulrahim; Zubair Ahmad; Jolly Bhadra; Noora Jabor Al-Thani. Long-Term Stability Analysis of 3D and 2D/3D Hybrid Perovskite Solar Cells Using Electrochemical Impedance Spectroscopy. Molecules 2020, 25, 5794 .
AMA StyleSumayya M. Abdulrahim, Zubair Ahmad, Jolly Bhadra, Noora Jabor Al-Thani. Long-Term Stability Analysis of 3D and 2D/3D Hybrid Perovskite Solar Cells Using Electrochemical Impedance Spectroscopy. Molecules. 2020; 25 (24):5794.
Chicago/Turabian StyleSumayya M. Abdulrahim; Zubair Ahmad; Jolly Bhadra; Noora Jabor Al-Thani. 2020. "Long-Term Stability Analysis of 3D and 2D/3D Hybrid Perovskite Solar Cells Using Electrochemical Impedance Spectroscopy." Molecules 25, no. 24: 5794.
The future photovoltaic technologies based on perovskite materials are aimed to build low tech, truly economical, easily fabricated, broadly deployable, and trustworthy solar cells. Hole transport material (HTM) free perovskite solar cells (PSCs) are among the most likely architectures which hold a distinctive design and provide a simple way to produce large-area and cost-effective manufacture of PSCs. Notably, in the monolithic scheme of the HTM-free PSCs, all layers can be printed using highly reproducible and morphology-controlled methods, and this design has successfully been demonstrated for industrial-scale fabrication. In this review article, we comprehensively describe the recent advancements in the different types of mesoporous (nanostructured) and planar HTM-free PSCs. In addition, the effect of various nanostructures and mesoporous layers on their performance is discussed using the electrochemical impedance spectroscopy (EIS) technique. We bring together the different perspectives that researchers have developed to interpret and analyze the EIS data of the HTM-free PSCs. Their analysis using the EIS tool, the limitations of these studies, and the future work directions to overcome these limitations to enhance the performance of HTM-free PSCs are comprehensively considered.
Sumayya M. Abdulrahim; Zubair Ahmad; Jolly Bahadra; Noora J. Al-Thani. Electrochemical Impedance Spectroscopy Analysis of Hole Transporting Material Free Mesoporous and Planar Perovskite Solar Cells. Nanomaterials 2020, 10, 1635 .
AMA StyleSumayya M. Abdulrahim, Zubair Ahmad, Jolly Bahadra, Noora J. Al-Thani. Electrochemical Impedance Spectroscopy Analysis of Hole Transporting Material Free Mesoporous and Planar Perovskite Solar Cells. Nanomaterials. 2020; 10 (9):1635.
Chicago/Turabian StyleSumayya M. Abdulrahim; Zubair Ahmad; Jolly Bahadra; Noora J. Al-Thani. 2020. "Electrochemical Impedance Spectroscopy Analysis of Hole Transporting Material Free Mesoporous and Planar Perovskite Solar Cells." Nanomaterials 10, no. 9: 1635.
Polyaniline (PANI)/Cu–ZnS composites with porous microspheres are prepared by a hydrothermal and in situ polymerization method.
Hemalatha Parangusan; Jolly Bhadra; Zubair Ahmad; Shoaib Mallick; Farid Touati; Noora Al-Thani. Investigation of the structural, optical and gas sensing properties of PANI coated Cu–ZnS microsphere composite. RSC Advances 2020, 10, 26604 -26612.
AMA StyleHemalatha Parangusan, Jolly Bhadra, Zubair Ahmad, Shoaib Mallick, Farid Touati, Noora Al-Thani. Investigation of the structural, optical and gas sensing properties of PANI coated Cu–ZnS microsphere composite. RSC Advances. 2020; 10 (45):26604-26612.
Chicago/Turabian StyleHemalatha Parangusan; Jolly Bhadra; Zubair Ahmad; Shoaib Mallick; Farid Touati; Noora Al-Thani. 2020. "Investigation of the structural, optical and gas sensing properties of PANI coated Cu–ZnS microsphere composite." RSC Advances 10, no. 45: 26604-26612.
Porous microstructure materials are considered good candidates for the development of highly sensitive and fast humidity sensors. In this regard, we prepared polyaniline (PANI) decorated Cu–ZnS porous microsphere structures (PMSs) for the fabrication of humidity sensors. PANI coated Cu–ZnS PMSs were synthesized by a hydrothermal method and in situ polymerization process. The synthesized PMSs were characterized by different techniques to study the structural, morphological and surface absorption properties. Several compositions for the PANI/Cu–ZnS PMS were investigated, which were then compared with pure PANI. The experimental observations demonstrate that a PANI/1%Cu–ZnS PMS has better sensitivity, fast response and good stability compared to pure PANI and other PANI/CuZnS compositions. Finally, a PANI/1% Cu–ZnS PMS was found to be optimized for humidity sensors due to its well distributed roughness, porosity and hydrophilicity. The average response and recovery times for PANI/1% Cu–ZnS were found to be 42 s and 24 s, respectively, which outperform recent results.
Hemalatha Parangusan; Jolly Bhadra; Zubair Ahmad; Shoaib Mallick; Farid Touati; Noora Al-Thani. Capacitive type humidity sensor based on PANI decorated Cu–ZnS porous microspheres. Talanta 2020, 219, 121361 .
AMA StyleHemalatha Parangusan, Jolly Bhadra, Zubair Ahmad, Shoaib Mallick, Farid Touati, Noora Al-Thani. Capacitive type humidity sensor based on PANI decorated Cu–ZnS porous microspheres. Talanta. 2020; 219 ():121361.
Chicago/Turabian StyleHemalatha Parangusan; Jolly Bhadra; Zubair Ahmad; Shoaib Mallick; Farid Touati; Noora Al-Thani. 2020. "Capacitive type humidity sensor based on PANI decorated Cu–ZnS porous microspheres." Talanta 219, no. : 121361.
Herein we report superior dye-degradation performance for polyaniline-silver (PANI-Ag) nanoparticle coated on polystyrene (PS) electrospun membrane by in situ-polymerization method. Morphological study of the coated membrane shows PANI-Ag nanofibril network with average diameter of 100 nm around micrometer diameter electrospun PS fiber. X-ray diffractogram (XRD) showed the formation of PANI-Ag nanocomposite and according to Bragg’s reflection the crystal diffraction plans are from the FCC structure of Ag. Thermal analysis of the composite reveals glass transition temperature observed in the temperature range from 100−110 °C for both PANI and PANI-Ag coated samples and 5 % residue is left after heating it to 800 °C, which may be due to presence of Ag in the composite. Antimicrobial study indicates that pure PANI sample do not exhibit any antibacterial performance for both Staphylococcus aureus and Escherichia coli. However, antibacterial behavior is observed for PANI-Ag samples when experiment is performed. The photocatalytic degradation of AZG dye solution using PS/PANI-Ag membrane shows 85 % of AZG dye degraded within 180 min. The stability check of the nanocomposites is done by FTIR analysis PS/PANI-Ag nanocomposite is not affected and no chemical transformation takes place during the photodegradation process.
Jolly Bhadra; Hemalatha Parangusan; Anton Popelka; Marian Lehocky; Petr Humpolicek; Noora Al-Thani. Electrospun Polystyrene/PANI-Ag fibers for organic dye removal and antibacterial application. Journal of Environmental Chemical Engineering 2020, 8, 103746 .
AMA StyleJolly Bhadra, Hemalatha Parangusan, Anton Popelka, Marian Lehocky, Petr Humpolicek, Noora Al-Thani. Electrospun Polystyrene/PANI-Ag fibers for organic dye removal and antibacterial application. Journal of Environmental Chemical Engineering. 2020; 8 (3):103746.
Chicago/Turabian StyleJolly Bhadra; Hemalatha Parangusan; Anton Popelka; Marian Lehocky; Petr Humpolicek; Noora Al-Thani. 2020. "Electrospun Polystyrene/PANI-Ag fibers for organic dye removal and antibacterial application." Journal of Environmental Chemical Engineering 8, no. 3: 103746.
This work presents a method on the preparation and performance of four silver (Ag) concentrations in polyaniline (PANI) and polyvinyl alcohol (PVA) nanocomposite blend (PNPAg). The synthesis of Ag nanoparticles is first performed by photo reduction and then aniline is polymerized in Ag-PVA matrix. Morphological analysis by SEM and TEM reveals formation of nanoparticles with diameter 30–70nm. Nanocomposites with lower Ag concentrations have highly aligned PNPAg nanofibers of diameter 50–80nm and agglomeration for the one with higher concentrations. In addition, FTIR spectra show a systematic change in its characteristic peaks with increase in Ag contents. The crystallinity study depicts the tetragonal crystal structure of metallic nanocomposites having same particle sizes as obtained in SEM and TEM. In order to explore the possible applications of these nanocomposites in electronic industry, their electrical properties are investigated. The in-plane I-V characteristics indicate a transition of polymer nanocomposites from non-ohmic to ohmic material with increase of Ag content. The room temperature electrical conductivities are found to be in the range of 4.74×10−4 to 3.96×10−2S/m with no major difference in activation energy for all nanocomposites
J. Bhadra; N.J. Al-Thani; S. Karmakar; N.K. Madi. Photo-reduced route of polyaniline nanofiber synthesis with embedded silver nanoparticles. Arabian Journal of Chemistry 2019, 12, 4848 -4860.
AMA StyleJ. Bhadra, N.J. Al-Thani, S. Karmakar, N.K. Madi. Photo-reduced route of polyaniline nanofiber synthesis with embedded silver nanoparticles. Arabian Journal of Chemistry. 2019; 12 (8):4848-4860.
Chicago/Turabian StyleJ. Bhadra; N.J. Al-Thani; S. Karmakar; N.K. Madi. 2019. "Photo-reduced route of polyaniline nanofiber synthesis with embedded silver nanoparticles." Arabian Journal of Chemistry 12, no. 8: 4848-4860.
In this work, laboratory prepared PANI and it’s composite with carbon nanotubes (PANI/CNTs) were used for the fabrication of micropatterns on flexible polyethylene terephthalate (PET) substrate using the drop cast method and plasma technology. Plasma technology was employed as an adhesion promoter between the PET substrate and PANI layers, as was confirmed by the peel tests. The PANI and PANI-CNTs deposited layers on PET were thoroughly characterized in terms of the surface, as well as the structural morphology, by various microscopic and scanning probe techniques. Moreover, the electrical conductivity of the deposited layers was confirmed by broadband dielectric spectroscopy (BDS) and conductive atomic force microscopy (ORCA-AFM). The presence of CNTs in the PANI/CNTs composite was responsible for the more uniform and compact deposited layers and better electrical conductivity. The laboratory prepared PANI/CNTs samples excelled in terms of their stable conductivity in the whole frequency range.
Anton Popelka; Jolly Bhadra; Asma Abdulkareem; Peter Kasak; Zdenko Spitalsky; Se Won Jang; Noora Al-Thani. Fabrication of flexible electrically conductive polymer-based micropatterns using plasma discharge. Sensors and Actuators A: Physical 2019, 301, 111727 .
AMA StyleAnton Popelka, Jolly Bhadra, Asma Abdulkareem, Peter Kasak, Zdenko Spitalsky, Se Won Jang, Noora Al-Thani. Fabrication of flexible electrically conductive polymer-based micropatterns using plasma discharge. Sensors and Actuators A: Physical. 2019; 301 ():111727.
Chicago/Turabian StyleAnton Popelka; Jolly Bhadra; Asma Abdulkareem; Peter Kasak; Zdenko Spitalsky; Se Won Jang; Noora Al-Thani. 2019. "Fabrication of flexible electrically conductive polymer-based micropatterns using plasma discharge." Sensors and Actuators A: Physical 301, no. : 111727.
A flexible thin membrane made of a graphene–PANI nanocomposite decorated PS electrospun fibre as a highly sensitive carbon dioxide gas sensor.
Jolly Bhadra; Anton Popelka; Asma Abdulkareem; Zubair Ahmad; Farid Touati; Noora Al-Thani. Fabrication of polyaniline–graphene/polystyrene nanocomposites for flexible gas sensors. RSC Advances 2019, 9, 12496 -12506.
AMA StyleJolly Bhadra, Anton Popelka, Asma Abdulkareem, Zubair Ahmad, Farid Touati, Noora Al-Thani. Fabrication of polyaniline–graphene/polystyrene nanocomposites for flexible gas sensors. RSC Advances. 2019; 9 (22):12496-12506.
Chicago/Turabian StyleJolly Bhadra; Anton Popelka; Asma Abdulkareem; Zubair Ahmad; Farid Touati; Noora Al-Thani. 2019. "Fabrication of polyaniline–graphene/polystyrene nanocomposites for flexible gas sensors." RSC Advances 9, no. 22: 12496-12506.
This work presents an extensively detailed study on preparation and performance of four different hydrochloric acid–doped polyaniline (PANI) blends. The blends are obtained by changing four different polymers, viz. polyvinyl alcohol (PVA), polystyrene (PS), polyvinyl chloride (PVC), and sodium alginate (SA) keeping PANI concentration constant. Finally, the blend films deposited on substrates are used to characterize the surface, structural morphology, chemical interaction (SEM and FTIR), thermal properties (TGA and DSC), and mechanical properties by tensile testing. The morphological analysis shows uniform chemical blending of PANI with all three insulating matrices except in PVC matrix. FTIR and TGA results also suffice the fact that PANI particle has a chemical interaction with polymer backbones. Electrical conductivity study of PANI blend reveals that PANI-PVA forms the highest conducting blend with the conductivity of order of 10−2 S/cm and PANI-PVC has the lowest at 10−13S/cm.
Jolly Bhadra; Noora Al-Thani. Advances in blends preparation based on electrically conducting polymer. Emergent Materials 2019, 2, 67 -77.
AMA StyleJolly Bhadra, Noora Al-Thani. Advances in blends preparation based on electrically conducting polymer. Emergent Materials. 2019; 2 (1):67-77.
Chicago/Turabian StyleJolly Bhadra; Noora Al-Thani. 2019. "Advances in blends preparation based on electrically conducting polymer." Emergent Materials 2, no. 1: 67-77.
In this paper, the effect of TiO2 ceramic nanoparticles on the thermal stability, morphology, molecular mass, structure and electrical properties of the polylactic acid-Titanium dioxide (PLA-TiO2) composites, aimed for relative humidity (RH) sensing have been reported. PLA-TiO2 nanocomposites films were developed through a spin coating process. The developed films were characterized by X-ray diffraction (XRD), Raman spectroscopy, thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), field emission scanning electron microscopy (FESEM), atomic force microscopy (AFM) and electrochemical impedance spectroscopy analysis (EIS). To investigate the RH-dependent characteristics, the devices were prepared on pre-patterned ITO substrates. The capacitive and resistive response of the nanocomposite films were studied under RH levels ranging from 20–90%. The PLA-TiO2 nano-sensing films, having modified surface by acetone etching, exhibited superior morphological and electrical performance when compared to PLA-TiO2 pristine samples.
Shoaib Mallick; Zubair Ahmad; Farid Touati; Jolly Bhadra; R.A. Shakoor; N.J. Al-Thani. PLA-TiO2 nanocomposites: Thermal, morphological, structural, and humidity sensing properties. Ceramics International 2018, 44, 16507 -16513.
AMA StyleShoaib Mallick, Zubair Ahmad, Farid Touati, Jolly Bhadra, R.A. Shakoor, N.J. Al-Thani. PLA-TiO2 nanocomposites: Thermal, morphological, structural, and humidity sensing properties. Ceramics International. 2018; 44 (14):16507-16513.
Chicago/Turabian StyleShoaib Mallick; Zubair Ahmad; Farid Touati; Jolly Bhadra; R.A. Shakoor; N.J. Al-Thani. 2018. "PLA-TiO2 nanocomposites: Thermal, morphological, structural, and humidity sensing properties." Ceramics International 44, no. 14: 16507-16513.
J. Bhadra; N.J. Al-Thani; A. Abdulkareem. The effect of electrospinning parameters on polystyrene nanofiber morphology: oil-water separation. Desalination and Water Treatment 2018, 111, 146 -154.
AMA StyleJ. Bhadra, N.J. Al-Thani, A. Abdulkareem. The effect of electrospinning parameters on polystyrene nanofiber morphology: oil-water separation. Desalination and Water Treatment. 2018; 111 ():146-154.
Chicago/Turabian StyleJ. Bhadra; N.J. Al-Thani; A. Abdulkareem. 2018. "The effect of electrospinning parameters on polystyrene nanofiber morphology: oil-water separation." Desalination and Water Treatment 111, no. : 146-154.
Mansoor Ani Najeeb; Zubair Ahmad; R.A. Shakoor; Abdulla Alashraf; Jolly Bhadra; N.J. Al-Thani; Shaheen A. Al-Muhtaseb; A.M.A. Mohamed. Growth of MAPbBr3 perovskite crystals and its interfacial properties with Al and Ag contacts for perovskite solar cells. Optical Materials 2017, 73, 50 -55.
AMA StyleMansoor Ani Najeeb, Zubair Ahmad, R.A. Shakoor, Abdulla Alashraf, Jolly Bhadra, N.J. Al-Thani, Shaheen A. Al-Muhtaseb, A.M.A. Mohamed. Growth of MAPbBr3 perovskite crystals and its interfacial properties with Al and Ag contacts for perovskite solar cells. Optical Materials. 2017; 73 ():50-55.
Chicago/Turabian StyleMansoor Ani Najeeb; Zubair Ahmad; R.A. Shakoor; Abdulla Alashraf; Jolly Bhadra; N.J. Al-Thani; Shaheen A. Al-Muhtaseb; A.M.A. Mohamed. 2017. "Growth of MAPbBr3 perovskite crystals and its interfacial properties with Al and Ag contacts for perovskite solar cells." Optical Materials 73, no. : 50-55.
This study presents a novel photo-sensor configuration that incorporates a layer of liquid electrolyte into the conventional BHJ photodiode arrangement. The current study presents a new type of inexpensive and very sensitive bulk heterojunction (BHJ) organic photo-sensor (OPS) configuration that incorporates a layer of liquid electrolyte into the conventional BHJ photodiode arrangement. Initially, a P3HT:PCBM blend based photo-anode was deposited onto ITO substrates using spin coating. Then the semiconductor coated photo-anode was attached to a Pt/ITO counter electrode. A 40 µm gap between photo-anode and counter electrode was filled with a liquid (iodine based) HI-30 electrolyte. Various electrical parameters including ideality factor, series and shunt resistance were extracted from the current–voltage characteristics under dark and light conditions. The value of mobility measured under dark conditions was found to be 25.58 × 10 −6 m 2 V −1 s −1 . In addition, the samples were found to have a series and shunt resistance of 133.33 Ω and 74.70 kΩ, respectively. Under illumination, the fabricated photodiodes exhibited a linear current–irradiance relationship, with a rapid response time, when exposed to transient light, thus making the newly proposed hybrid BHJ photo-diode configuration a potential alternative to the conventional photo-sensors.
Ali Sephar Shikoh; Zubair Ahmad; Farid Touati; R. A. Shakoor; Jolly Bhadra; N. J. Al-Thani. A BHJ-thin-film/liquid-electrolyte based electrochemical-sensor for visible light-detection. RSC Advances 2017, 7, 35445 -35450.
AMA StyleAli Sephar Shikoh, Zubair Ahmad, Farid Touati, R. A. Shakoor, Jolly Bhadra, N. J. Al-Thani. A BHJ-thin-film/liquid-electrolyte based electrochemical-sensor for visible light-detection. RSC Advances. 2017; 7 (56):35445-35450.
Chicago/Turabian StyleAli Sephar Shikoh; Zubair Ahmad; Farid Touati; R. A. Shakoor; Jolly Bhadra; N. J. Al-Thani. 2017. "A BHJ-thin-film/liquid-electrolyte based electrochemical-sensor for visible light-detection." RSC Advances 7, no. 56: 35445-35450.
We report the effect of microwaves sintering on the crystal domain and electrical properties of TiO2 nanoparticles. Commercially available TiO2 nanoparticles of 25 nm size were coated on ITO (indium tin oxide) substrates, which were then sintered at 450 °C employing microwave and conventional sintering approaches. The structural properties of the sintered coatings were examined using atomic force microscopy (AFM), scanning electron microscope (SEM), X-ray diffraction (XRD), and energy-dispersive X-ray spectroscopy (EDS), whereas the charge transfer properties were investigated using electrochemical impedance spectroscopy (EIS). Structural analysis reveals that the microwave sintering of TiO2-coated substrates results in the formation of more ordered crystal structure as compared to the conventionally sintered samples. Nyquist plots demonstrate the improved charge transfer characteristics of TiO2 nanoparticles in microwave-sintered layers. Also, the application of the microwave-sintered TiO2-coated ITO substrates as photoanode in dye-sensitized solar cells (DSSCs) confirms superior electrical properties compared to conventionally sintered samples.
Mansoor Ani Najeeb; Asma Alkareem; Muhammad Awais; Zubair Ahmad; R.A. Shakoor; Abdulla Alashraf; Adel Mohamed Mohamed; Jolly Bhadra; N.J. Al-Thani; Farid Touati; Saqib Rafique. Effect of microwave sintering on the crystal domain and electrical properties of TiO2 nanoparticles. Journal of Nanoparticle Research 2017, 19, 1 .
AMA StyleMansoor Ani Najeeb, Asma Alkareem, Muhammad Awais, Zubair Ahmad, R.A. Shakoor, Abdulla Alashraf, Adel Mohamed Mohamed, Jolly Bhadra, N.J. Al-Thani, Farid Touati, Saqib Rafique. Effect of microwave sintering on the crystal domain and electrical properties of TiO2 nanoparticles. Journal of Nanoparticle Research. 2017; 19 (6):1.
Chicago/Turabian StyleMansoor Ani Najeeb; Asma Alkareem; Muhammad Awais; Zubair Ahmad; R.A. Shakoor; Abdulla Alashraf; Adel Mohamed Mohamed; Jolly Bhadra; N.J. Al-Thani; Farid Touati; Saqib Rafique. 2017. "Effect of microwave sintering on the crystal domain and electrical properties of TiO2 nanoparticles." Journal of Nanoparticle Research 19, no. 6: 1.
In this research work, we investigated the flexible thermo-electro chemicals cells (TECs) for the conversion of low-grade heat into electrical energy.
Zubair Ahmad; Jolly Bhadra; Farid Touati; Abdullah Alashraf; R. A. Shakoor; N. J. Al-Thani. Flexible thermo-electrochemical cells using Iodolyte HI-30 for conversion of low-grade heat to electrical energy. RSC Advances 2016, 6, 71370 -71374.
AMA StyleZubair Ahmad, Jolly Bhadra, Farid Touati, Abdullah Alashraf, R. A. Shakoor, N. J. Al-Thani. Flexible thermo-electrochemical cells using Iodolyte HI-30 for conversion of low-grade heat to electrical energy. RSC Advances. 2016; 6 (75):71370-71374.
Chicago/Turabian StyleZubair Ahmad; Jolly Bhadra; Farid Touati; Abdullah Alashraf; R. A. Shakoor; N. J. Al-Thani. 2016. "Flexible thermo-electrochemical cells using Iodolyte HI-30 for conversion of low-grade heat to electrical energy." RSC Advances 6, no. 75: 71370-71374.