@article {43392, title = {Antimicrobial activity of ZnO nanoparticles against pathogenic bacteria and fungi}, journal = {JSM Nanotechnology and Nanomedicine}, volume = {2}, year = {2014}, month = {JAN}, pages = {1-7}, author = {Navale, G. R. and Thripuranthaka, M. and Late, Dattatray J. and Shinde, Sandip S.} } @article { ISI:000209665200041, title = {MoS2 nanoparticles and h-BN nanosheets from direct exfoliation of bulk powder: one-step synthesis method}, journal = {Materials Research Express}, volume = {1}, number = {3}, year = {2014}, month = {SEP}, pages = {035038}, publisher = {IOP PUBLISHING LTD}, address = {TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND}, abstract = {

We report facile synthesis of MoS2 nanoparticles and h-BN nanosheets using ultrasonication method in suitable solvents such as N-Methyl-2-pyrrolidone and ethylene glycol, respectively. The average size of MoS2 nanoparticles observed from TEM analysis were 4-5 nm and about a few hundreds of nm for h-BN nanosheets. Raman spectroscopy carried out on nanoparticle samples confirms the formation of MoS2 nanoparticles and h-BN nanosheets. UV-vis absorption and photoluminescence (PL) measurements carried out on the products show typical absorption and luminescence spectra of MoS2 and h-BN. Further, we attempted to decorate gold nanoparticles on nanosheets of MoS2 and h-BN which show subsequent change in Raman spectra due to charge transfer interaction.

}, keywords = {h-BN, MoS2, Nanoparticles, nanosheets, Optical properties}, issn = {2053-1591}, doi = {10.1088/2053-1591/1/3/035038}, author = {Thripuranthaka, M. and Rout, Chandra Sekhar and Late, Dattatray J.} } @article { ISI:000330201900057, title = {Temperature Dependent Phonon Shifts in Single-Layer WS2}, journal = {Acs Applied Materials \& Interfaces}, volume = {6}, number = {2}, year = {2014}, month = {JAN}, pages = {1158-1163}, publisher = {AMER CHEMICAL SOC}, address = {1155 16TH ST, NW, WASHINGTON, DC 20036 USA}, abstract = {

Atomically thin two-dimensional tungsten disulfide (WS2) sheets have attracted much attention due to their potential for future nanoelectronic device applications. We report first experimental investigation on temperature dependent Raman spectra of single-layer WS2 prepared using micromechanical exfoliation. Our temperature dependent Raman spectroscopy results shows that the E-2g(1) and A(1g) modes of single-layer WS2 soften as temperature increases from 77 to 623 K. The calculated temperature coefficients of the frequencies of 2LA(M), E-2g(1), A(1g), and A(1g)(M) + LA(M) modes of single-layer WS2 were observed to be -0.008, -0.006, -0.006, and -0.01 cm(-1) K-1, respectively. The results were explained in terms of a double resonance process which is active in atomically thin nanosheet. This process can also be largely applicable in other emerging single-layer materials.

}, keywords = {layered materials, phonon vibrations, Raman spectroscopy, thermal effect, WS2}, issn = {1944-8244}, doi = {10.1021/am404847d}, author = {Thripuranthaka, M. and Late, Dattatray J.} } @article { ISI:000334078500086, title = {Temperature dependent Raman spectroscopy of chemically derived few layer MoS2 and WS2 nanosheets (vol 104, 081911, 2014)}, journal = {Applied Physics Letters}, volume = {104}, number = {12}, year = {2014}, month = {MAR}, pages = {129901}, publisher = {AMER INST PHYSICS}, address = {CIRCULATION \& FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA}, issn = {0003-6951}, doi = {10.1063/1.4869463}, author = {Thripuranthaka, M. and Kashid, Ranjit V. and Rout, Chandra Sekhar and Late, Dattatray J.} } @article { ISI:000332619100046, title = {Temperature dependent Raman spectroscopy of chemically derived few layer MoS2 and WS2 nanosheets}, journal = {Applied Physics Letters}, volume = {104}, number = {8}, year = {2014}, month = {FEB}, pages = {081911}, publisher = {AMER INST PHYSICS}, address = {1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA}, abstract = {We have systematically investigated the temperature dependent Raman spectroscopy behavior of a few layered MoS2 and WS2 nanosheets synthesized using simple hydrothermal method. Our result reveals A(1g) and E-2g(1) modes soften as temperature increases from 77 K to 623 K. This behavior can be explained in terms of a double resonance process which is active in single-and few layer thick nanosheets. The frequency shifts and peak broadening can provide unambiguous, nondestructive, and accurate information of a few layered MoS2 and WS2. This mechanism can also be applicable in characterizing the structural, optical, electronic, and vibrational properties of other emerging layered materials. (c) 2014 AIP Publishing LLC.}, issn = {0003-6951}, doi = {10.1063/1.4866782}, author = {Thripuranthaka, M. and Kashid, Ranjit V. and Rout, Chandra Sekhar and Late, Dattatray J.} } @article { ISI:000354067400001, title = {Stable field emission from layered MoS2 nanosheets in high vacuum and observation of 1/f noise}, journal = {Nanomaterials and Nanotechnology}, volume = {5}, year = {2015}, month = {APR}, pages = {10}, publisher = {INTECH EUROPE}, address = {JANEZA TRDINE 9, RIJEKA, 51000, CROATIA}, abstract = {

Field emission and current noise of hydrothermally synthesized MoS2 nanosheets are investigated in ultra-high-vacuum and industrially suited high-vacuum conditions. The study reveals that the emission turn-on field is pressure dependent. Moreover, the MoS2 nanosheets exhibit more stable field-electron emission in high-vacuum than in ultra-high-vacuum conditions. The investigations on field-emission current fluctuations show features of 1/f-type noise in ultra-high-vacuum and high-vacuum conditions, attributed to adsorption and desorption processes. The post-field-emission results indicate the MoS2 nanosheets are a robust field emitter in high-vacuum conditions.

}, keywords = {Electron emission, layered materials, MoS2, Noise measurement, Raman spectroscopy}, issn = {1847-9804}, doi = {10.5772/60071}, author = {Kashid, Ranjit V. and Joag, Pracheetee D. and Thripuranthaka, M. and Rout, Chandra S. and Late, Dattatray J. and More, Mahendra A.} } @article {47131, title = {High efficiency lithium storage in 3D composite foam of Co3O4 nanoparticles integrated carbon nanohorns}, journal = {Materials Science and Engineering B-Advanced Functional Solid-State Materials}, volume = {263}, year = {2021}, month = {JAN}, pages = {114839}, type = {Article}, abstract = {

A well-designed 3 dimensional (3D) nanocomposite foam of Co3O4 nanoparticles and functionalized carbon nano horns (CNH) is prepared by feasible wet chemistry followed by lyophilization. This 3D nanocomposite foam is evaluated electrochemically as anode material for lithium-ion battery (LIB). 3D hierarchical mesoporous hybrid of functionalized carbon nano horn-Co3O4 (CCO) shows excellent lithium storage properties with long cycle life due to high surface area, good conductivity, 3D interconnected mesoporous structure, mechanical and chemical stability and shortened diffusion path length for Li+ ions during lithiation-delithiation. The Co3O4 nanoparticles incorporated into interconnected CNH foam effectively increases the number of active sites of CCO nanocomposite and consequently increase in the reversible specific capacity and coulombic efficiency. Different compositions of CNH foam with Co3O4 nanoparticles are prepared, among which the CCO 1:1 foam displays reversible capacity of 797 mAhg1 at current density of 0.1 Ag-1 along with excellent rate performance. High specific capacity of around 702 mAhg(-1) is obtained even at the current density of 5 Ag-1.

}, keywords = {3D CCO foam, carbon nanohorns, Excellent rate capability, Li ion diffusion coefficient, Long Cycle life}, issn = {0921-5107}, doi = {10.1016/j.mseb.2020.114839}, author = {Dwivedi, Pravin K. and Parte, Golu and Thripuranthaka, M. and Shelke, Manjusha V.} } @article {48112, title = {3D x-ray microtomography investigations on the bimodal porosity and high sulfur impregnation in 3D carbon foam for Li-S battery application}, journal = {Journal of Physics-Energy}, volume = {4}, year = {2022}, month = {JAN }, pages = {014003}, type = {Article}, abstract = {

Lithium-sulfur (Li-S) batteries, regarded as one of the most promising alternatives to current state-of-the-art rechargeable Li-ion battery technologies, have received tremendous attention as potential candidates for next-generation portable electronics and the rapidly advancing electric vehicle market. However, substantial capacity decay, miserable cycle life, and meagre stability remain critical challenges. More specifically, shuttling of polysulfide (Li2S (x) (3 \< x \<= 8)) species severely hinders the cycle performance resulting in capacity fade and cycling instability. In the present work, a highly conducting three-dimensional (3D) carbon nanofiber (CNF) foam has been synthesized using the lyophilization method followed by thermal pyrolysis. The highly porous foam materials have a bimodal porosity distribution in the nano and micro regime and were successfully investigated to serve as a potential host for sulfur species intended for Li-S battery application. 3D x-ray microtomography was employed to estimate the nature of sulfur impregnation and distribution in the 3D porous networks. On utilizing the final product as cathode material, sulfur impregnated carbonized CNF foam and modified the separator with functionalized multiwalled carbon nanotubes delivered a specific capacity of similar to 845 mAh g(-1) at 100 mA g(-1).

}, keywords = {bimodal porosity, CNF foam, Li-S battery, microtomography}, issn = {2515-7655}, doi = {10.1088/2515-7655/ac4c34}, author = {Thripuranthaka, M. and Chaturvedi, Vikash and Dwivedi, Pravin Kumari and Torris, Arun and Shelke, V. Manjusha} } @article {48330, title = {Carbon encapsulated NiCo2S4 nanoparticles with enhanced surface mediated charge storage for superior ultracapacitor electrodes}, journal = {Chemistry-An Asian Journal}, volume = {18}, year = {2023}, month = {APR}, type = {Article}, abstract = {

Three different compositions of NiCo2S4 (NCS) materials were prepared using three solvents, named NCS HTDI (hydrothermal in DI water), NCS STEG (solvothermal in ethylene glycol), and a novel carbon-encapsulated NCS STFA (solvothermal in formamide). The structural and morphological properties of the prepared NCS HTDI, NCS STEG, and NCS HTDI materials were analyzed using various physical characterization techniques. As prepared, NCS materials were tested as an electrode for supercapacitor (SC) application using a 3-electrode system in a basic electrolyte (3 M KOH). NCS HTDI exhibits a specific capacitance of 2536 F g(-1), NCS STEG shows 1355 F g(-1), and NCS STFA shows 1178 F g(-1) at an input current density of 1 A g(-1). The SBN-PSC material is utilized as a counter electrode in the NCS STFA || SBN-PSC-based asymmetric SC device. The device exhibits exceptionally superior electrochemical performance with a specific capacitance of 172 F g(-1) at 10 A g(-1) input current density and 97\% capacity retention after 5000 cycles in a voltage window of 1.6 V. The results confirm the superiority of NCS STFA||SBN-PSC deviceas an excellent high-energy and high-power SC.

}, keywords = {Asymmetric supercapacitor device, NiCo2S4, pseudocapacitor, Surface charge storage}, issn = {1861-4728}, doi = {10.1002/asia.202300121}, author = {Chaturvedi, Vikash and Pawar, Meenakshi and Thripuranthaka, M. and Shivade, Rajkiran and Shelke, Manjusha V. V.} }