01612nas a2200217   4500008004100000022001400041245006000055210005900115260007100174300001400245490000600259520089400265653002201159653002201181653002301203653001901226653000801245100002301253700002401276856009401300       2014                        eng d  a1944-824400aTemperature Dependent Phonon Shifts in Single-Layer WS20 aTemperature Dependent Phonon Shifts in SingleLayer WS2  a1155 16TH ST, NW, WASHINGTON, DC 20036 USAbAMER CHEMICAL SOCcJAN  a1158-11630 v63 a<p>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.</p>10alayered materials10aphonon vibrations10aRaman spectroscopy10athermal effect10aWS21 aThripuranthaka, M.1 aLate, Dattatray, J.  uhttps://library.ncl.res.in/content/temperature-dependent-phonon-shifts-single-layer-ws2-001609nas a2200265   4500008004100000022001400041245009900055210006900154260006400223300000700287490000600294520068100300653002200981653002201003653000901025653002201034653002301056100002301079700002501102700002301127700002201150700002401172700002301196856012401219       2015                        eng d  a1847-980400aStable field emission from layered MoS2 nanosheets in high vacuum and observation of 1/f noise0 aStable field emission from layered MoS2 nanosheets in high vacuu  aJANEZA TRDINE 9, RIJEKA, 51000, CROATIAbINTECH EUROPEcAPR  a100 v53 a<p>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.</p>10aElectron emission10alayered materials10aMoS210aNoise measurement10aRaman spectroscopy1 aKashid, Ranjit, V.1 aJoag, Pracheetee, D.1 aThripuranthaka, M.1 aRout, Chandra, S.1 aLate, Dattatray, J.1 aMore, Mahendra, A.  uhttps://library.ncl.res.in/content/stable-field-emission-layered-mos2-nanosheets-high-vacuum-and-observation-1f-noise-1