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Dr. Sumit Sinha Ray
Department of Mechanical and Industrial Engineering, University of Illinois at Chicago, IL, USA

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Research Keywords & Expertise

0 Biomaterials
0 Drug Delivery
0 Experimental and theoretical thermal-fluid sciences at the micro/nanoscale
0 Water purification and filtration
0 Porous materials for energy applications

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Review
Published: 03 June 2021 in Polymers
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The ongoing global pandemic has bestowed high priority uponthe separation of air-borne particulate matters (PMs), aerosols, etc. using nonwoven fibrous materials, especially for face masks as a means of personal protection. Although spunbond or meltblown nonwoven materials are amongst the forerunners for polymer microfiber-based face mask or air filter development in mass scale, relatively new process of nonwoven manufacturing such as electrospinning is gaining a lot of momentum amongst the filter membrane manufacturers for its scalability of nanofiber-based filter membrane fabrication. There are several nanofiber-based face masks developing industries, which claim a very high efficiency in filtration of particulate matters (PM0.1–10) as well as other aerosols for their products. Polyvinylidene fluoride (PVDF), which is commonly known for its use of tactile sensors and energy harvesters, due to its piezoelectric property, is slowly gaining popularity among researchers and developers as an air filter material. Electrospun PVDF nanofibers can be as fine as 50 nm in mass scale, which allows the membrane to have large surface area compared to its volume, enhancing nanofiber–PM interaction. At the same time, the breathability index can be improved through these PVDF nanofiber membranes due to their architectural uniqueness that promotes slip flow around the fibers. The conductive nature of PVDF makes it advantageous as a promising electret filter allowing better capturing of ultrafine particles. This review aims to provide a comprehensive overview of such PVDF nanofiber-based filter membranes and their roles in air filtration, especially its application in filtrate of air-borne PMs.

ACS Style

Ayishe Sanyal; Sumit Sinha-Ray. Ultrafine PVDF Nanofibers for Filtration of Air-Borne Particulate Matters: A Comprehensive Review. Polymers 2021, 13, 1864 .

AMA Style

Ayishe Sanyal, Sumit Sinha-Ray. Ultrafine PVDF Nanofibers for Filtration of Air-Borne Particulate Matters: A Comprehensive Review. Polymers. 2021; 13 (11):1864.

Chicago/Turabian Style

Ayishe Sanyal; Sumit Sinha-Ray. 2021. "Ultrafine PVDF Nanofibers for Filtration of Air-Borne Particulate Matters: A Comprehensive Review." Polymers 13, no. 11: 1864.

Research article
Published: 24 May 2021 in Experimental Heat Transfer
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Pool boiling of ethanol and Cu-nanofluid was investigated on bare and novel supersonic nanoblown polymer nanofiber nanotextured copper surface. Significant improvement in early ONB (2°C reduction), CHF (23.5%), and BHTC (~2–2.5 times) were achieved in nanotextured surface than bare one. Boiling of nanofluids led to the degradation of ONB and BHTC, with an increase in CHF by 16.7%. Synergistic effect of nanofluid boiling on nanotextured surface led to remarkable enhancement of CHF (44%), BHTC (>2.5 times), and ONB (3°C reduction). The nanofluid and nanotexture aided in ONB and CHF via enhancing nucleation sites, liquid overheating, bubble chopping, and surface wettability.

ACS Style

Satyam Singh Thakur; Sheshang Singh Chandel; Ashish Kakoria; Sumit Sinha-Ray. Enhancement in pool boiling heat transfer of ethanol and nanofluid on novel supersonic nanoblown nanofiber textured surface. Experimental Heat Transfer 2021, 1 -17.

AMA Style

Satyam Singh Thakur, Sheshang Singh Chandel, Ashish Kakoria, Sumit Sinha-Ray. Enhancement in pool boiling heat transfer of ethanol and nanofluid on novel supersonic nanoblown nanofiber textured surface. Experimental Heat Transfer. 2021; ():1-17.

Chicago/Turabian Style

Satyam Singh Thakur; Sheshang Singh Chandel; Ashish Kakoria; Sumit Sinha-Ray. 2021. "Enhancement in pool boiling heat transfer of ethanol and nanofluid on novel supersonic nanoblown nanofiber textured surface." Experimental Heat Transfer , no. : 1-17.

Conference paper
Published: 20 December 2020 in Functional Textiles and Clothing 2020
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Cigarette smoking has various direct and indirect concerns regarding the health of active and passive smokers. Cigarette smoke consists of many complex aerosols, including metals like arsenic (As), cadmium (Cd), chromium (Cr), lead (Pb), iron (Fe), mercury (Hg), and so on. Cigarette filters which are designed to separate toxic aerosols from the smoke to enter into human lungs are less looked after once the smoking is over, and often they are thrown precariously near water bodies. These filters buds when exposed to environment can release absorbed chemicals in soil and water, eventually resulting in biomagnification of toxic chemicals in plant or animal. Electrospun polymer nanofibers, like polyacrylonitrile (PAN), can be a useful alternative to filter materials in commercial cigarette. This paper suggests modification of traditional cigarette filters with PAN nanofibers which can be carbonized to prepare conductive substrate. Electrospun nanofibers when rolled like regular cigarette filters exhibited similar pressure drop with near identical molar flux of inhaled gas. However, the weight gain of regular cigarette filter after smoking was mere 25 %, whereas electrospun PAN nanofiber filter gained 115 % in weight after smoking. The same filter membrane, after smoking, was carbonized to make carbon nanofibers (CNF), which showed enhanced capacitance behavior in cyclic voltammetry study in KOH medium.

ACS Style

Prakash Giri; Ashish Kakoria; Sahil Verma; Sumit Sinha-Ray. Reuse of Cigarette Filters for Energy Applications. Functional Textiles and Clothing 2020 2020, 161 -168.

AMA Style

Prakash Giri, Ashish Kakoria, Sahil Verma, Sumit Sinha-Ray. Reuse of Cigarette Filters for Energy Applications. Functional Textiles and Clothing 2020. 2020; ():161-168.

Chicago/Turabian Style

Prakash Giri; Ashish Kakoria; Sahil Verma; Sumit Sinha-Ray. 2020. "Reuse of Cigarette Filters for Energy Applications." Functional Textiles and Clothing 2020 , no. : 161-168.

Journal article
Published: 16 December 2020 in Polymer
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Industrially scalable fabrication of Chitosan (CS)/Nylon-6 (N) based nanofiber membrane was achieved using novel Solution Blowing technique with 40% Nylon-6 being replaced with Chitosan. The membrane was used as an efficient, reusable adsorbent of heavy metal (Cu2+) from water encompassing a wide range of metal ion concentrations, namely- 3–100 mg/L. At pH- 4 the adsorption was most favorable, and the maximum capacity was found to be as high as 240 mg/g owing to highly available active amine (-N¨H2) groups. At lower concentration, the adsorption profile could be matched with both Langmuir and Freundlich adsorption isotherms. However, both isotherms failed at higher concentration regime, hypothesizing possible access to sub-surface availability of active sites, which is otherwise not reported for fiber-based adsorbents as per best of knowledge of authors. Large scale (4L) demonstration with such adsorbent, with 90% metal ion removal efficiency, exhibits the potential of the membrane in practical applications. The membrane could be reused up to 8 times where the leachate can be used for metal extraction.

ACS Style

Ashish Kakoria; Suman Sinha-Ray; Sumit Sinha-Ray. Industrially scalable Chitosan/Nylon-6 (CS/N) nanofiber-based reusable adsorbent for efficient removal of heavy metal from water. Polymer 2020, 213, 123333 .

AMA Style

Ashish Kakoria, Suman Sinha-Ray, Sumit Sinha-Ray. Industrially scalable Chitosan/Nylon-6 (CS/N) nanofiber-based reusable adsorbent for efficient removal of heavy metal from water. Polymer. 2020; 213 ():123333.

Chicago/Turabian Style

Ashish Kakoria; Suman Sinha-Ray; Sumit Sinha-Ray. 2020. "Industrially scalable Chitosan/Nylon-6 (CS/N) nanofiber-based reusable adsorbent for efficient removal of heavy metal from water." Polymer 213, no. : 123333.

Research article
Published: 26 December 2018 in ACS Applied Nano Materials
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An effective, cost-efficient catalyst material that can replace Platinum as electrode material in fuel cell has become the focus point of non-fossil fuel based alternate energy systems. Transition/post-transition metal oxide-based catalyst development is now the thrust area in the above-mentioned context for efficient energy conversions, especially oxygen reduction reaction (ORR), oxygen evolution reaction (OER) and hydrogen evolution reaction (HER). Here, for the first time, application of electrospun beta-Gallium oxide (β-Ga2O3) nanofibers, a post-transition metal oxide, as an efficient bi-functional catalyst material is reported. These nanofibers are highly porous (specific surface area ~100-300 m2/g) and exhibit a mesoporous architecture (pore size ~1.5-2 nm) which facilitates better ion transport through the spongy morphology of individual nanofiber. The fabricated -Ga2O3 nanofibers performed at par with Pt/C catalyst, like for ORR the onset potential was 0.84 V (vs RHE) and for HER, although the onset potential was -0.34 V (vs RHE), the current density was visibly better than the latter catalyst. This catalyst also performed much better in methanol tolerance test and was near similar in current retention for 6 h, as measured in chronoamperometry. This performance was solely attributed by the large surface area and unique morphology presented by the material, via a rather simple fabrication technique, without addition of any dopant material.

ACS Style

Ashish Kakoria; Bandhana Devi; Abhishek Anand; Aditi Halder; Rik Rani Koner; Sumit Sinha-Ray. Gallium Oxide Nanofibers for Hydrogen Evolution and Oxygen Reduction. ACS Applied Nano Materials 2018, 2, 64 -74.

AMA Style

Ashish Kakoria, Bandhana Devi, Abhishek Anand, Aditi Halder, Rik Rani Koner, Sumit Sinha-Ray. Gallium Oxide Nanofibers for Hydrogen Evolution and Oxygen Reduction. ACS Applied Nano Materials. 2018; 2 (1):64-74.

Chicago/Turabian Style

Ashish Kakoria; Bandhana Devi; Abhishek Anand; Aditi Halder; Rik Rani Koner; Sumit Sinha-Ray. 2018. "Gallium Oxide Nanofibers for Hydrogen Evolution and Oxygen Reduction." ACS Applied Nano Materials 2, no. 1: 64-74.

Review
Published: 02 July 2018 in Fibers
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Electrospinning, for the last few decades, has been extensively acknowledged for its ability to manufacture a macro/nanofibrous architecture from biopolymers, which is otherwise difficult to obtain, in a cost effective and user-friendly technique. Such biopolymer nanofibers can be tailored to meet applications such as drug delivery, tissue engineering, filtration, fuel cell, and food packaging etc. Due to their structural uniqueness, chemical and mechanical stability, functionality, super-high surface area-to-volume ratio, and one-dimensional orientation, electrospun biopolymer nanofibers have been proven to be extremely beneficial. A parallel method in nonwoven methodologies called “Solution Blowing” has also become a potential candidate to fabricate a similar type of architecture from biopolymer fibers, and is gaining popularity among researchers, despite its recent advent in early 2000’s. This review chiefly focuses on the fabrication of biopolymer macro/nanofibers via electrospinning and solution blowing, and several applications of such fiber architectures. Biopolymers include plant- and animal-derived biopolymers, such as cellulose, lignin, chitin, and chitosan, as well as proteins and their derivatives. The fabrication of biopolymer fibers from these biopolymers alone or as blends, predominantly with biodegradable polymers like Polyvinyl alcohol (PVA), Polyethylene Oxide (PEO), Polyethylene glycol (PEG), poly (lactide-co-glycolide) (PLGA) etc., or non-biodegradable polymers like polyamide, Polyacrylonitrile (PAN) etc., will be discussed in detail, along with the applications of several composites of such sort.

ACS Style

Ashish Kakoria; Sumit Sinha-Ray. A Review on Biopolymer-Based Fibers via Electrospinning and Solution Blowing and Their Applications. Fibers 2018, 6, 45 .

AMA Style

Ashish Kakoria, Sumit Sinha-Ray. A Review on Biopolymer-Based Fibers via Electrospinning and Solution Blowing and Their Applications. Fibers. 2018; 6 (3):45.

Chicago/Turabian Style

Ashish Kakoria; Sumit Sinha-Ray. 2018. "A Review on Biopolymer-Based Fibers via Electrospinning and Solution Blowing and Their Applications." Fibers 6, no. 3: 45.

Article
Published: 30 June 2017 in Macromolecular Materials and Engineering
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Transparent conducting electrodes attract attention in relation to solar cells, touch panels, displays, e-readers, and transparent heaters. In many cases, rarefied metal nets with optical transmittance of ≈90% and with minimal sheet resistance are sought after. Here, a mesh of conducting polymer nanofibers is developed as a transparent conducting electrode. A sheet resistance of 8.4 kΩ sq−1 with 84% optical transmittance is achieved with polyethylene oxide/poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEO/PEDOT:PSS) blended polymer nanofibers. This study also demonstrates that such nanofiber being deposited on a glass substrate can be used as a transparent film heater in relevant applications such as window heating or displays at harsh environments. Such a transparent heater is rated at 0.41 W in.−2 for 120 V. It is also capable of heating a substrate up to ≈70 °C in 4 min at 60 V from room temperature without any degeneration of nanofiber network, rendering itself as a practically useful transparent heater. The performance of the PEO/PEDOT:PSS nanofiber-coated transparent glass heater is comparable to that of the relatively expensive indium tin oxide thin-film heaters.

ACS Style

Sebnem Duzyer; Sumit Sinha-Ray; Suman Sinha-Ray; Alexander L. Yarin. Transparent Conducting Electrodes from Conducting Polymer Nanofibers and Their Application as Thin-Film Heaters. Macromolecular Materials and Engineering 2017, 302, 1 .

AMA Style

Sebnem Duzyer, Sumit Sinha-Ray, Suman Sinha-Ray, Alexander L. Yarin. Transparent Conducting Electrodes from Conducting Polymer Nanofibers and Their Application as Thin-Film Heaters. Macromolecular Materials and Engineering. 2017; 302 (10):1.

Chicago/Turabian Style

Sebnem Duzyer; Sumit Sinha-Ray; Suman Sinha-Ray; Alexander L. Yarin. 2017. "Transparent Conducting Electrodes from Conducting Polymer Nanofibers and Their Application as Thin-Film Heaters." Macromolecular Materials and Engineering 302, no. 10: 1.

Journal article
Published: 01 May 2017 in International Journal of Heat and Mass Transfer
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ACS Style

Sebastian Fischer; Rakesh P. Sahu; Sumit Sinha Ray; Alexander L. Yarin; Tatiana Gambaryan-Roisman; Peter Stephan. Effect of nano-textured heater surfaces on evaporation at a single meniscus. International Journal of Heat and Mass Transfer 2017, 108, 2444 -2450.

AMA Style

Sebastian Fischer, Rakesh P. Sahu, Sumit Sinha Ray, Alexander L. Yarin, Tatiana Gambaryan-Roisman, Peter Stephan. Effect of nano-textured heater surfaces on evaporation at a single meniscus. International Journal of Heat and Mass Transfer. 2017; 108 ():2444-2450.

Chicago/Turabian Style

Sebastian Fischer; Rakesh P. Sahu; Sumit Sinha Ray; Alexander L. Yarin; Tatiana Gambaryan-Roisman; Peter Stephan. 2017. "Effect of nano-textured heater surfaces on evaporation at a single meniscus." International Journal of Heat and Mass Transfer 108, no. : 2444-2450.

Journals
Published: 20 April 2017 in Nanoscale
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Mechanically robust freestanding platinum (Pt) nanofiber (NF) meshes are of great interest in applications where the corrosion resistance, malleability, and stability of a pure platinum structure must be combined with high surface area for catalysis. For photoelectrochemical applications, transparent electrodes are desirable. Several 1-dimensional (1D) Pt-based materials have been developed, but energy-intensive fabrication techniques and unsatisfactory performance have limited their practical implementation in next-generation photoelectrochemical applications. Here, we introduce relatively simple yet commercially-viable methods for creating robust, free-standing PtNF mats through combined electrospinning/solution blowing and electroplating steps. The PtNFs obtained by these processes exhibited outstanding low sheet resistance (Rs) values with reasonable transparency. In addition, the PtNFs were highly bendable and stretchable. Thus, the new methods and materials presented here hold great promise for creating mechanically robust and catalytically active transparent conducting films for diverse photoelectrochemical applications.

ACS Style

Seongpil An; Yong Il Kim; Sumit Sinha-Ray; Min-Woo Kim; Hong Seok Jo; Mark T. Swihart; Alexander L. Yarin; Sam S. Yoon. Facile processes for producing robust, transparent, conductive platinum nanofiber mats. Nanoscale 2017, 9, 6076 -6084.

AMA Style

Seongpil An, Yong Il Kim, Sumit Sinha-Ray, Min-Woo Kim, Hong Seok Jo, Mark T. Swihart, Alexander L. Yarin, Sam S. Yoon. Facile processes for producing robust, transparent, conductive platinum nanofiber mats. Nanoscale. 2017; 9 (18):6076-6084.

Chicago/Turabian Style

Seongpil An; Yong Il Kim; Sumit Sinha-Ray; Min-Woo Kim; Hong Seok Jo; Mark T. Swihart; Alexander L. Yarin; Sam S. Yoon. 2017. "Facile processes for producing robust, transparent, conductive platinum nanofiber mats." Nanoscale 9, no. 18: 6076-6084.

Journal article
Published: 05 March 2017 in npj Microgravity
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Here, we demonstrate that heat removed in pool boiling from a heater mimicking high-power microelectronics could be used to facilitate a swing-like motion of the heater before being finally dissipated. This swing-like motion could be beneficial for shedding a large vapor bubble that encapsulates high-power heaters in microgravity where buoyancy force is unavailable for vapor bubble removal. The swing-like motion is propelled by vapor bubble recoil, the force which exists irrespective of gravity and buoyancy. We also demonstrate that this force could be significantly enhanced by depositing on the heater surface supersonically blown polymer nanofibers with cross-sectional diameters below 100 nm. These nanofibers provide additional nucleation sites, resulting in much more frequent bubble nucleation and departure, and thus a higher overall vapor recoil force propelling the heater motion. Such nanofibers strongly adhere to the heater surface and withstand prolonged harsh pool boiling. The measured velocity of the model swing-like heater in Novec 7300 fluid is about 1 cm/s.

ACS Style

Sumit Sinha-Ray; Wenshuo Zhang; Barak Stoltz; Rakesh P. Sahu; Suman Sinha-Ray; Alexander L. Yarin. Swing-like pool boiling on nano-textured surfaces for microgravity applications related to cooling of high-power microelectronics. npj Microgravity 2017, 3, 9 .

AMA Style

Sumit Sinha-Ray, Wenshuo Zhang, Barak Stoltz, Rakesh P. Sahu, Suman Sinha-Ray, Alexander L. Yarin. Swing-like pool boiling on nano-textured surfaces for microgravity applications related to cooling of high-power microelectronics. npj Microgravity. 2017; 3 (1):9.

Chicago/Turabian Style

Sumit Sinha-Ray; Wenshuo Zhang; Barak Stoltz; Rakesh P. Sahu; Suman Sinha-Ray; Alexander L. Yarin. 2017. "Swing-like pool boiling on nano-textured surfaces for microgravity applications related to cooling of high-power microelectronics." npj Microgravity 3, no. 1: 9.

Journal article
Published: 01 March 2017 in International Journal of Heat and Mass Transfer
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ACS Style

Sumit Sinha Ray; Wenshuo Zhang; Rakesh Sahu; Suman Sinha-Ray; Alexander L. Yarin. Pool boiling of Novec 7300 and DI water on nano-textured heater covered with supersonically-blown or electrospun polymer nanofibers. International Journal of Heat and Mass Transfer 2017, 106, 482 -490.

AMA Style

Sumit Sinha Ray, Wenshuo Zhang, Rakesh Sahu, Suman Sinha-Ray, Alexander L. Yarin. Pool boiling of Novec 7300 and DI water on nano-textured heater covered with supersonically-blown or electrospun polymer nanofibers. International Journal of Heat and Mass Transfer. 2017; 106 ():482-490.

Chicago/Turabian Style

Sumit Sinha Ray; Wenshuo Zhang; Rakesh Sahu; Suman Sinha-Ray; Alexander L. Yarin. 2017. "Pool boiling of Novec 7300 and DI water on nano-textured heater covered with supersonically-blown or electrospun polymer nanofibers." International Journal of Heat and Mass Transfer 106, no. : 482-490.

Journal article
Published: 01 November 2016 in Polymer
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ACS Style

Arkaprovo Ghosal; Sumit Sinha-Ray; Suman Sinha-Ray; Alexander L. Yarin; Behnam Pourdeyhimi. Numerical modeling and experimental study of solution-blown nonwovens formed on a rotating drum. Polymer 2016, 105, 255 -263.

AMA Style

Arkaprovo Ghosal, Sumit Sinha-Ray, Suman Sinha-Ray, Alexander L. Yarin, Behnam Pourdeyhimi. Numerical modeling and experimental study of solution-blown nonwovens formed on a rotating drum. Polymer. 2016; 105 ():255-263.

Chicago/Turabian Style

Arkaprovo Ghosal; Sumit Sinha-Ray; Suman Sinha-Ray; Alexander L. Yarin; Behnam Pourdeyhimi. 2016. "Numerical modeling and experimental study of solution-blown nonwovens formed on a rotating drum." Polymer 105, no. : 255-263.

Journal article
Published: 01 April 2016 in International Journal of Heat and Mass Transfer
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Pool boiling of Novec 7300 fluid and self-rewetting water–heptanol mixtures on bare copper surface and a copper surface coated with copper-plated nanofibers is studied experimentally. The experimental data revealed a significant increase in the heat removal rate up to the critical heat flux (CHF) on the copper-plated nanofiber surfaces in comparison with bare copper surfaces. Also, the critical heat flux increases on the copper-plated nanofiber surface, albeit it is reached at a lower surface superheat in comparison with bare copper surface. Prolong boiling in water facilitates oxidation of the layer of copper-plated nanofibers, and diminishes its roughness, albeit does not affect the heat transfer rate.

ACS Style

Rakesh Sahu; Sumit Sinha Ray; Suman Sinha-Ray; Alexander L. Yarin. Pool boiling of Novec 7300 and self-rewetting fluids on electrically-assisted supersonically solution-blown, copper-plated nanofibers. International Journal of Heat and Mass Transfer 2016, 95, 83 -93.

AMA Style

Rakesh Sahu, Sumit Sinha Ray, Suman Sinha-Ray, Alexander L. Yarin. Pool boiling of Novec 7300 and self-rewetting fluids on electrically-assisted supersonically solution-blown, copper-plated nanofibers. International Journal of Heat and Mass Transfer. 2016; 95 ():83-93.

Chicago/Turabian Style

Rakesh Sahu; Sumit Sinha Ray; Suman Sinha-Ray; Alexander L. Yarin. 2016. "Pool boiling of Novec 7300 and self-rewetting fluids on electrically-assisted supersonically solution-blown, copper-plated nanofibers." International Journal of Heat and Mass Transfer 95, no. : 83-93.

Research article
Published: 18 March 2016 in Molecular Pharmaceutics
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Sustained controlled drug release is one of the prominent contributions for more successful treatment outcomes in the case of several diseases. However, the incorporation of hydrophilic drugs into nanofibers, a promising novel delivery system, and achieving a long-term sustained release still pose a challenging task. In this work we demonstrated a robust method of avoiding burst release of drugs and achieving a sustained drug release from 2 to 4 weeks using core–shell nanofibers with poly(methyl methacrylate) (PMMA) shell and monolithic poly(vinyl alcohol) (PVA) core or a novel type of core–shell nanofibers with blended (PVA and PMMA) core loaded with ciprofloxacin hydrochloride (CIP). It is also shown that, for core–shell nanofibers with monolithic core, drug release can be manipulated by varying flow rate of the core PVA solution, whereas for core–shell nanofibers with blended core, drug release can be manipulated by varying the ratios between PMMA and PVA in the core. During coaxial electrospinning, when the solvent from the core evaporates in concert with the solvent from the shell, the interconnected pores spanning the core and the shell are formed. The release process is found to be desorption-limited and agrees with the two-stage desorption model. Ciprofloxacin-loaded nanofiber mats developed in the present work could be potentially used as local drug delivery systems for treatment of several medical conditions, including periodontal disease and skin, bone, and joint infections.

ACS Style

Špela Zupančič; Sumit Sinha-Ray; Suman Sinha-Ray; Julijana Kristl; Alexander L. Yarin. Controlled Release of Ciprofloxacin from Core–Shell Nanofibers with Monolithic or Blended Core. Molecular Pharmaceutics 2016, 13, 1393 -1404.

AMA Style

Špela Zupančič, Sumit Sinha-Ray, Suman Sinha-Ray, Julijana Kristl, Alexander L. Yarin. Controlled Release of Ciprofloxacin from Core–Shell Nanofibers with Monolithic or Blended Core. Molecular Pharmaceutics. 2016; 13 (4):1393-1404.

Chicago/Turabian Style

Špela Zupančič; Sumit Sinha-Ray; Suman Sinha-Ray; Julijana Kristl; Alexander L. Yarin. 2016. "Controlled Release of Ciprofloxacin from Core–Shell Nanofibers with Monolithic or Blended Core." Molecular Pharmaceutics 13, no. 4: 1393-1404.

Journal article
Published: 01 February 2016 in International Journal of Heat and Mass Transfer
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ACS Style

Martin Freystein; Felix Kolberg; Lucas Spiegel; Sumit Sinha-Ray; Rakesh P. Sahu; Alexander L. Yarin; Tatiana Gambaryan-Roisman; Peter Stephan. Trains of Taylor bubbles over hot nano-textured mini-channel surface. International Journal of Heat and Mass Transfer 2016, 93, 827 -833.

AMA Style

Martin Freystein, Felix Kolberg, Lucas Spiegel, Sumit Sinha-Ray, Rakesh P. Sahu, Alexander L. Yarin, Tatiana Gambaryan-Roisman, Peter Stephan. Trains of Taylor bubbles over hot nano-textured mini-channel surface. International Journal of Heat and Mass Transfer. 2016; 93 ():827-833.

Chicago/Turabian Style

Martin Freystein; Felix Kolberg; Lucas Spiegel; Sumit Sinha-Ray; Rakesh P. Sahu; Alexander L. Yarin; Tatiana Gambaryan-Roisman; Peter Stephan. 2016. "Trains of Taylor bubbles over hot nano-textured mini-channel surface." International Journal of Heat and Mass Transfer 93, no. : 827-833.

Journal article
Published: 29 December 2015 in Journal of Heat Transfer
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Liquid film flow boiling heat transfer driven by electrohydrodynamic (EHD) conduction pumping is experimentally studied on a surface with a novel metal-plated nanofiber-mat coating. The nanotextured surface is formed on a copper substrate covered by an electrospun polymer nanofiber mat, which is copper-plated as a postprocess. The mat has a thickness of about 30 μm and is immersed in saturated HCFC-123. The objective is to study electrowetting of the copper-plated nanofiber-enhanced surface via EHD conduction pumping mechanism for the entire liquid film flow boiling regime leading up to critical heat flux (CHF), and compare it to the bare surface without EHD-driven flow. The results show that with the combination of these two techniques, for a given superheat value, enhancement in heat flux and boiling heat transfer coefficient is as high as 555% compared to the bare surface. The results are quite promising for thermal management applications.

ACS Style

Viral K. Patel; Jamal Seyed-Yagoobi; Suman Sinha-Ray; Sumit Sinha-Ray; Alexander Yarin. Electrohydrodynamic Conduction Pumping-Driven Liquid Film Flow Boiling on Bare and Nanofiber-Enhanced Surfaces. Journal of Heat Transfer 2015, 138, 041501 .

AMA Style

Viral K. Patel, Jamal Seyed-Yagoobi, Suman Sinha-Ray, Sumit Sinha-Ray, Alexander Yarin. Electrohydrodynamic Conduction Pumping-Driven Liquid Film Flow Boiling on Bare and Nanofiber-Enhanced Surfaces. Journal of Heat Transfer. 2015; 138 (4):041501.

Chicago/Turabian Style

Viral K. Patel; Jamal Seyed-Yagoobi; Suman Sinha-Ray; Sumit Sinha-Ray; Alexander Yarin. 2015. "Electrohydrodynamic Conduction Pumping-Driven Liquid Film Flow Boiling on Bare and Nanofiber-Enhanced Surfaces." Journal of Heat Transfer 138, no. 4: 041501.

Research article
Published: 16 December 2015 in Molecular Pharmaceutics
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Nanofibers represent an attractive novel drug delivery system for prolonged and controlled release. However, sustained release of hydrophilic drugs, like ciprofloxacin hydrochloride (CIP), from polymeric nanofibers is not an easy task. The present study investigates the effect of different hydrophobic polymers (PCL and PMMA) alone in monolithic nanofibers or with hydrophilic polymers (PVA, PEO, and chitosan) in blended nanofibers aiming to achieve sustained CIP release. CIP release from PCL nanofibers was 46% and from PMMA just 1.5% over 40 day period. Thus, PMMA holds great promise for modification of CIP release from blended nanofibers. PMMA blends with 10% PEO, PVA, or chitosan were used to electrospin nanofibers from solution in the mixture of acetic and formic acid. These nanofibers exhibited different drug-release profiles: PEO containing nanofiber mats demonstrated high burst effect, chitosan containing mats revealed very slow gradual release, and PVA containing mats yielded smaller burst effect with favorable sustained release. We have also shown that gradual sustain release of antibiotic like CIP can be additionally tuned over 18 days with various blend ratios of PMMA with PVA or chitosan reaching almost 100%. A mathematical model in agreement with the experimental observation revealed that the sustained CIP release from the blended nanofibers corresponded to the two-stage desorption process.

ACS Style

Špela Zupančič; Sumit Sinha-Ray; Suman Sinha-Ray; Julijana Kristl; Alexander L. Yarin. Long-Term Sustained Ciprofloxacin Release from PMMA and Hydrophilic Polymer Blended Nanofibers. Molecular Pharmaceutics 2015, 13, 295 -305.

AMA Style

Špela Zupančič, Sumit Sinha-Ray, Suman Sinha-Ray, Julijana Kristl, Alexander L. Yarin. Long-Term Sustained Ciprofloxacin Release from PMMA and Hydrophilic Polymer Blended Nanofibers. Molecular Pharmaceutics. 2015; 13 (1):295-305.

Chicago/Turabian Style

Špela Zupančič; Sumit Sinha-Ray; Suman Sinha-Ray; Julijana Kristl; Alexander L. Yarin. 2015. "Long-Term Sustained Ciprofloxacin Release from PMMA and Hydrophilic Polymer Blended Nanofibers." Molecular Pharmaceutics 13, no. 1: 295-305.

Journal article
Published: 01 August 2015 in International Journal of Heat and Mass Transfer
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ACS Style

Rakesh Sahu; Sumit Sinha Ray; Suman Sinha-Ray; Alexander L. Yarin. Pool boiling on nano-textured surfaces comprised of electrically-assisted supersonically solution-blown, copper-plated nanofibers: Experiments and theory. International Journal of Heat and Mass Transfer 2015, 87, 521 -535.

AMA Style

Rakesh Sahu, Sumit Sinha Ray, Suman Sinha-Ray, Alexander L. Yarin. Pool boiling on nano-textured surfaces comprised of electrically-assisted supersonically solution-blown, copper-plated nanofibers: Experiments and theory. International Journal of Heat and Mass Transfer. 2015; 87 ():521-535.

Chicago/Turabian Style

Rakesh Sahu; Sumit Sinha Ray; Suman Sinha-Ray; Alexander L. Yarin. 2015. "Pool boiling on nano-textured surfaces comprised of electrically-assisted supersonically solution-blown, copper-plated nanofibers: Experiments and theory." International Journal of Heat and Mass Transfer 87, no. : 521-535.

Journal article
Published: 01 July 2015 in Journal of Membrane Science
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ACS Style

Sumit Sinha Ray; Suman Sinha-Ray; Alexander L. Yarin; Behnam Pourdeyhimi. Application of solution-blown 20–50nm nanofibers in filtration of nanoparticles: The efficient van der Waals collectors. Journal of Membrane Science 2015, 485, 132 -150.

AMA Style

Sumit Sinha Ray, Suman Sinha-Ray, Alexander L. Yarin, Behnam Pourdeyhimi. Application of solution-blown 20–50nm nanofibers in filtration of nanoparticles: The efficient van der Waals collectors. Journal of Membrane Science. 2015; 485 ():132-150.

Chicago/Turabian Style

Sumit Sinha Ray; Suman Sinha-Ray; Alexander L. Yarin; Behnam Pourdeyhimi. 2015. "Application of solution-blown 20–50nm nanofibers in filtration of nanoparticles: The efficient van der Waals collectors." Journal of Membrane Science 485, no. : 132-150.

Journal article
Published: 01 January 2015 in Polymer
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Sumit Sinha Ray; Suman Sinha-Ray; Alexander L. Yarin; Behnam Pourdeyhimi. Theoretical and experimental investigation of physical mechanisms responsible for polymer nanofiber formation in solution blowing. Polymer 2015, 56, 452 -463.

AMA Style

Sumit Sinha Ray, Suman Sinha-Ray, Alexander L. Yarin, Behnam Pourdeyhimi. Theoretical and experimental investigation of physical mechanisms responsible for polymer nanofiber formation in solution blowing. Polymer. 2015; 56 ():452-463.

Chicago/Turabian Style

Sumit Sinha Ray; Suman Sinha-Ray; Alexander L. Yarin; Behnam Pourdeyhimi. 2015. "Theoretical and experimental investigation of physical mechanisms responsible for polymer nanofiber formation in solution blowing." Polymer 56, no. : 452-463.