01832nas a2200205   4500008004100000022001400041245007000055210006900125260007100194300001400265490000600279520110600285653002101391653002201412653002201434653002301456653001901479100002401498856010401522       2015                        eng d  a1944-824400aTemperature dependent phonon shifts in few-layer black phosphorus0 aTemperature dependent phonon shifts in fewlayer black phosphorus  a1155 16TH ST, NW, WASHINGTON, DC 20036 USAbAMER CHEMICAL SOCcMAR  a5857-58620 v73 a<p>Atomically thin two-dimensional (2D) sheets of black phosphorus have attracted much attention due to their potential for future nanoelectronic and photonics device applications. Present investigations deal with the temperature dependent phonon shifts in a few-layer black phosphorus nanosheet sample prepared using micromechanical exfoliation on a 300 nm SiO2/Si substrate. The temperature dependent Raman spectroscopy experiments were carried out on a few-layer black phosphorus sample, which depicts softening of Ag-1 B-2g, and A(g)(2) modes as temperature increases from 77 to 673 K. The calculated temperature coefficients for Ag-1, B-2g, and A(g)(2) modes of the few-layer black phosphorus nanosheet sample were observed to be -0.01, -0.013, and -0.014 cm(-1) K-1, respectively. The temperature dependent softening modes of black phosphorus results were explained on the basis of a double resonance process which is more active in an atomically thin sample. This process can also be fundamentally pertinent in other promising and emerging 2D ultrathin layer and heterostructured materials.</p>10ablack phosphorus10alayered materials10aphonon vibrations10aRaman spectroscopy10athermal effect1 aLate, Dattatray, J.  uhttps://library.ncl.res.in/content/temperature-dependent-phonon-shifts-few-layer-black-phosphorus-001953nas a2200217   4500008004100000022001400041245013300055210006900188260007100257300001600328490000600344520109300350653002101443653003201464653002001496653001801516100002401534700002401558700002401582856012901606       2016                        eng d  a1944-824400aHumidity sensing and photodetection behavior of electrochemically exfoliated atomically thin-layered black phosphorus nanosheets0 aHumidity sensing and photodetection behavior of electrochemicall  a1155 16TH ST, NW, WASHINGTON, DC 20036 USAbAMER CHEMICAL SOCcMAY  a11548-115560 v83 a<p>Recent investigations on two-dimensional black phosphorus material mainly highlight work on few atomic layers and multilayers. It is still unknown if the black phosphorus atomically thin sheet is an ideal structure for the enhanced gas solid interactions due to its large surface area. To further investigate this concern, we have synthesized few atomic layer thick nanosheets of black phosphorus using an electrochemical exfoliation method. The surface morphology and thickness of the nanosheet were identified using AFM, TEM, and Raman spectroscopy. The black phosphorus nanosheet thick film device was used for the gas sensing application with exposure to different humidites. Further, the few layer black phosphorus nanosheet based transistor shows good mobility and on/off ratio. The UV light irradiation on the black phosphorus nanosheet shows good response time. The overall results show that the few layer thick film of black phosphorus nanosheets sample exhibits creditable sensitivity and better recovery time to be used in humidity sensor and photodetector applications.</p>10ablack phosphorus10aelectrochemical exfoliation10ahumidity sensor10aphotodetector1 aErande, Manisha, B.1 aPawar, Mahendra, S.1 aLate, Dattatray, J.  uhttps://library.ncl.res.in/content/humidity-sensing-and-photodetection-behavior-electrochemically-exfoliated-atomically-thin01926nas a2200193   4500008004100000022001400041245009300055210006900148260007300217300001200290490000800302520119600310653002101506653002101527653002301548653001501571100002401586856012201610       2016                        eng d  a1387-181100aLiquid exfoliation of black phosphorus nanosheets and its application as humidity sensor0 aLiquid exfoliation of black phosphorus nanosheets and its applic  aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcMAY  a494-5030 v2253 a<p>The bulk crystal of black phosphorus was exfoliated by liquid exfoliation method for a duration of 8 h using N-Methyl-2-Pyrrolidone as the solvent. The exfoliated sample was centrifuged at different rpm such as 3000, 5000 and 10,000 to separate out the 2D black phosphorus nanosheets with different thickness and length. The as synthesized black phosphorus nanosheets collected at these rpm values were characterized with TEM, AFM, Raman spectroscopy and Vis-NIR spectroscopy. Further, we investigated the humidity sensing behaviour of the devices fabricated by using these samples. The results obtained show that the device fabricated with black phosphorus nanosheets and nanoparticles obtained by filtration of the sample collected after 10,000 rpm exhibited better performance as compared to the nanosheets collected at 3000 and 5000 rpm. The response and recovery times of devices are found to be promising and better than those of the black phosphorus gas sensor reported earlier. The present investigations open up a new avenue for further studies in improving the performance of black phosphorus nanosheets based gas sensing devices. (C) 2016 Elsevier Inc. All rights reserved.</p>10ablack phosphorus10aHumidity sensors10aLiquid exfoliation10ananosheets1 aLate, Dattatray, J.  uhttps://library.ncl.res.in/content/liquid-exfoliation-black-phosphorus-nanosheets-and-its-application-humidity-sensor