@article { ISI:000344791100009, title = {Metallic few-layer flowerlike VS2 nanosheets as field emitters}, journal = {European Journal of Inorganic Chemistry}, number = {31}, year = {2014}, month = {NOV}, pages = {5331-5336}, publisher = {WILEY-V C H VERLAG GMBH}, address = {BOSCHSTRASSE 12, D-69469 WEINHEIM, GERMANY}, abstract = {

We report first-principles DFT calculations of the single-layer VS2 work function, the experimental synthesis of flower-like few-layer-thick VS2 nanosheets by a simple one-step hydrothermal method, and the investigation of their field emission properties. The turn-on field required to draw emission current densities of 1 and 10 mu A/cm(2) were 4 and 5.01 V/mu m, respectively. The observed turn-on field values are attributed to the high field enhancement factor (ca. 2500), which is due to presence of sharp protrusions in the VS2 nanosheets. Furthermore, the field-emission current stability of the VS2 emitter shows stable behavior over a period of 12 h. Further, DFT calculations show that the work function (f) of the single-layer VS2 emitter is 6.01 eV.

}, keywords = {Density functional calculations, field emission, Layered compounds, Nanostructures, Sulfur, Vanadium}, issn = {1434-1948}, doi = {10.1002/ejic.201402448}, author = {Rout, Chandra Sekhar and Khare, Ruchita T. and Kashid, Ranjit V. and Joag, Dilip S. and More, Mahendra A. and Lanzillo, Nicholas A. and Washington, Morris and Nayak, Saroj K. and Late, Dattatray J.} } @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:000350222400033, title = {Microwave and hydrothermal syntheses of WSe2 micro/nanorods and their application in supercapacitors}, journal = {RSC Advances}, volume = {5}, number = {28}, year = {2015}, month = {FEB}, pages = {21700-21709}, publisher = {ROYAL SOC CHEMISTRY}, address = {THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND}, abstract = {

WSe2 micro/nanorods were synthesized using one step microwave and hydrothermal methods. The as synthesized micro/nanorod samples of WSe2 were characterized using various characterization techniques such as SEM, TEM, Raman spectroscopy, X-ray diffraction, UV-visible and PL spectroscopy. The as synthesized samples were also tested for their applicability to use as cathode materials for supercapacitor applications. The WSe2 samples prepared by the microwave and hydrothermal methods (with use of tungstic acid as precursor) show noteworthy performance towards supercapacitor application. Our work opens a new avenue to use these simple methods to prepare various morphologies of inorganic nanomaterials and utilize them for various energy and nanoelectronics applications.

}, issn = {2046-2069}, doi = {10.1039/c4ra12599a}, author = {Chakravarty, Disha and Late, Dattatray J.} } @article { ISI:000351435100014, title = {Microwave-assisted synthesis of few-layered TaTe2 and its application as supercapacitor}, journal = {European Journal of Inorganic Chemistry}, number = {9}, year = {2015}, month = {MAR}, pages = {1598-1603}, publisher = {WILEY-V C H VERLAG GMBH}, address = {BOSCHSTRASSE 12, D-69469 WEINHEIM, GERMANY}, abstract = {

We report a simple and rapid microwave-assisted synthesis of tantalum telluride (TaTe2) nanosheets. The ratio of tantalum pentachloride (TaCl5) and elemental tellurium (Te) powder were adjusted in the presence of NaBH4 in such a way as to obtain the TaTe2 nanosheet. The samples were characterized by various techniques such as scanning electron microscopy (SEM), transmission electron microscopy (TEM), atomic force microscopy (AFM), UV/Vis spectroscopy, photoluminescence (PL) spectroscopy, and XRD. Our SEM, TEM, and AFM results show the formation of sheet-like morphology, while the XRD data confirms the high crystalline quality and stable phase of the TaTe2 formed. The supercapacitor cells were fabricated by using TaTe2 nanosheets as anode material, platinum metal wire as a counterelectrode, and Ag/AgCl as reference electrode. The calculated coulombic efficiency is more than 95\%, while the cycle-to-cycle decrease in capacity is less than 5\%. The maximum discharge or charging capacity is below 2.4 Wh/kg, which is an ideal characteristic for achieving supercapacitor behavior.

}, keywords = {Microwave chemistry, Nanostructures, Supercapacitors, Tantalum, Tellurium}, issn = {1434-1948}, doi = {10.1002/ejic.201403220}, author = {Chakravarty, Disha and Kumar, Praveen and Ugale, Vaishali S. and Late, Dattatray J.} } @article {43783, title = {MoO3-rGO nanocomposites for electrochemical energy storage}, journal = {Applied Surface Science}, volume = {418}, year = {2017}, month = {OCT}, pages = {2-8}, type = {Article}, abstract = {We have synthesized the one dimensional (1D) MoO3 nanorods and MoO3-rGO nanocomposite by using sonochemical dispersion method at low temperature. The obtained products were characterized by using Raman spectroscopy, FT-IR, SEM, TEM and HR-TEM. We have demonstrated the electrochemical properties of MoO3 nanorods and MoO3-rGO nanocomposites. The specific capacitance for MoO3 nanorods and MoO3-rGO nanocomposite was calculated to be 3.3 F/g and 22.83 F/g at current density of 0.3 A/g respectively. The nanocomposite of MoO3-rGO shows the better electrochemical performance as compared to pristine MoO3 nanorods sample due to improvement in the conductivity. Our result suggests that the MoO3-rGO nanocomposites material has great potential for electrochemical energy storage and related applications. (C) 2016 Elsevier B.V. All rights reserved.}, keywords = {Energy storage, Nanocomposites, Nanorods, Storage (materials), Temperature}, doi = {10.1016/j.apsusc.2016.11.199}, author = {Khandare, Lina and Late, Dattatray J.} } @article {47717, title = {MoS2 and CdMoS4 nanostructure-based UV light photodetectors}, journal = {Nanoscale Advances}, volume = {3}, year = {2021}, month = {AUG}, pages = {4799-4803}, type = {Article}, abstract = {We have developed MoS2 nanosheets and CdMoS4 hierarchical nanostructures based on a UV light photodetector. The surface morphologies of the as-prepared samples were investigated via field emission scanning electron microscopy (FESEM) and transmission electron microscopy (TEM). The performance parameters for the present photodetectors are investigated under the illumination of UV light having a wavelength of similar to 385 nm. Upon the illumination of UV light, the CdMoS4-based photodetector device showed a better response to UV light compared to the MoS2 device in terms of photoresponsivity, response time (similar to 72 s) and recovery time (similar to 94 s). Our results reveal that CdMoS4 hierarchical nanostructures are practical for enhancing the device performance.}, issn = {2516-0230}, doi = {10.1039/d1na00326g}, author = {Pawar, Mahendra S. and Kadam, Sunil R. and Kale, Bharat B. and Late, Dattatray J.} }