01460nas a2200205 4500008004100000022001400041245008600055210006900141260006900210300001200279490000800291520074200299653001501041653002101056653000801077653001201085100002201097700001901119856011601138 2015 eng d a0925-838800aHydrothermal synthesis of WS2/RGO sheet and their application in UV photodetector0 aHydrothermal synthesis of WS2RGO sheet and their application in  aPO BOX 564, 1001 LAUSANNE, SWITZERLANDbELSEVIER SCIENCE SAcDEC a298-3030 v6533 a

Two-dimensional (2D) semiconductor nanomaterials hold great promises for future electronics and optics. In this paper, we report UV photocurrent response of 2D hybrid materials consisting of layered WS2 nanosheets and reduced graphene oxide prepared by using one step hydrothermal method. Few-layer WS2 and WS2/RGO nanosheets are characterized by Raman spectroscopy and HRTEM. The electric and optoelectronic properties of WS2 and WS2/RGO based UV photodetector shows a fast response of 48s and 85s and high photosensitivity (80 mu AW(-1) and 3.21 mAW(-1)) indicating that the two-dimensional composite nanostructure WS2/RGO is an important material for high performance photodetectors. (C) 2015 Elsevier B.V. All rights reserved.

10ananosheets10aUV photodetector10aWS210aWS2/RGO1 aShelke, Nitin, T.1 aKarche, B., R. uhttps://library.ncl.res.in/content/hydrothermal-synthesis-ws2rgo-sheet-and-their-application-uv-photodetector-001703nas a2200145 4500008004100000245008300041210006900124260000800193300001400201490000800215520117800223100002201401700001901423856011501442 2017 eng d00aUltraviolet photosensor based on few layered reduced graphene oxide nanosheets0 aUltraviolet photosensor based on few layered reduced graphene ox cOCT a374-379 0 v4183 aReduced graphene oxide (RGO), a two-dimensional (2D) system, has attracted much interest in photonic applications owing to its ability to absorb light over a broad wavelength. This leads to several studies on RGO-based photosensors. In this paper, chemical oxidation of graphite was carried out at room temperature for the preparation of large area reduced graphene oxide using a modified Hummer's method. The as-prepared reduced graphene oxide was characterized by XRD, Raman spectroscopy, FESEM, and TEM to confirm the absence of impurities and to ascertain their morphology. In addition, the as-prepared reduced graphene oxide for its possible application as UV photosensor is reported. The electric and optoelectronic properties of RGO based UV photosensor shows a fast response and recovery time of 1 s and 3 s; high photoresponsitivity (3.74AW(-1)) and quantum efficiency (1274%) indicating that the graphene oxide is an important material for high performance photosensor. This work demonstrates the ultrafast photoresponse with high photoresponsivity, proving its potential as a promising material for optoelectronic devices. 2016 Elsevier B.V. All rights reserved.1 aShelke, Nitin, T.1 aKarche, B., R. uhttps://library.ncl.res.in/content/ultraviolet-photosensor-based-few-layered-reduced-graphene-oxide-nanosheets01846nas a2200217 4500008004100000022001400041245010500055210006900160260000800229300001400237490000700251520109900258653002101357653002401378653002601402653001501428100002201443700001801465700001901483856012601502 2019 eng d a1533-488000aHydrothermal growth and humidity-dependent electrical properties of molybdenum disulphide nanosheets0 aHydrothermal growth and humiditydependent electrical properties  cAUG a5158-51660 v193 a

In present investigation, we report humidity dependent electrical properties of molybdenum disulphide (MoS2) nanosheets. MoS2 nanosheets were prepared through a facile hydrothermal method with different reaction temperatures. The as-synthesized MoS2 nanosheets were characterized with XRD, SEM, TEM, and Raman spectroscopy, which confirmed successful preparation and rationality. Further, the humidity dependent electrical properties against relative humidity (RH) of these samples were carried out at room temperature. The results evinced that the sensors film fabricated with MoS2 nanosheets prepared at temperature 220 degrees C exhibited better performance compared to the nanosheets synthesized at 180 degrees C and 200 degrees C temperature. The RH sensing results exhibits highly sensitive, ultrafast response/recovery behaviour and outstanding repeatability than reported earlier. The excellent humidity sensing properties of the resultant MoS2 nanosheets was proved to be an excellent candidate for constructing ultrahigh-performance humidity sensor toward various applications.

10aHumidity sensors10aHydrothermal method10aMolybdenum Disulphide10ananosheets1 aShelke, Nitin, T.1 aKarle, S., C.1 aKarche, B., R. uhttps://library.ncl.res.in/content/hydrothermal-growth-and-humidity-dependent-electrical-properties-molybdenum-disulphide01575nas a2200169 4500008004100000022001400041245006100055210006100116260000800177300001600185490000700201520104500208100002201253700001801275700001901293856009301312 2020 eng d a0957-452200aPhotoresponse properties of CdSe thin film photodetector0 aPhotoresponse properties of CdSe thin film photodetector cSEP a15061-150690 v313 a

In the present investigation, the performance of highly sensitive photodetector based on CdSe thin film has been demonstrated. The cadmium selenide (CdSe) films were deposited successfully by spray pyrolysis method on glass substrate. The as-deposited films were used as visible light detector. Further, the structural, morphological, and optical properties of CdSe films were investigated through X-ray diffraction (XRD), scanning electron microscopy (SEM), atomic force microscopy, and optical absorption spectrophotometer. The XRD studies show that the produced samples are polycrystalline in nature. A UV-Visible absorbance spectrum indicates direct allowed transition with bandgap about 1.75 eV. The SEM micrographs depict uniformly distributed well defined uneven hexagonal grains. The CdSe film-based photodetector exhibits high responsivity, detectivity and shows an ultrafast photoresponse. The excellent photoresponse and high photosensitivity of CdSe film makes it a strong candidate for high-performance photodetectors.

1 aShelke, Nitin, T.1 aKarle, S., C.1 aKarche, B., R. uhttps://library.ncl.res.in/content/photoresponse-properties-cdse-thin-film-photodetector