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181 0 _ai
182 0 _ab
200 1 _aPulsed cathodoluminescence and Raman spectra of MoS2 and WS2 nanocrystals and their combination MoS2/WS2 produced by self-propagating high-temperature synthesis
_fF. E. Bozheev, D. T. Valiev, R. R. Nemkaeva
203 _aText
_celectronic
300 _aTitle screen
320 _a[References: 36 tit.]
330 _aMolybdenum and tungsten disulfide nanoplates were produced by self-propagating high-temperature synthesis in argon atmosphere. This method provides an easy way to produce MoS2 and WS2 from nanoplates up to single- and several layers. The Raman peak intensities corresponding to in-plane E12g and out-of-plane A1g vibration modes and their shifts strongly depend on the thicknesses of the MoS2 and WS2 platelets indicating size-dependent scaling laws and properties. An electron beam irradiation of MoS2 and WS2powders leads to an occurrence of pulsed cathodoluminescence (PCL) spectra at 575?nm (2.15?eV) and 550?nm (2.25?eV) characteristic to their intrinsic band gaps. For the combination of MoS2 and WS2nanopowders, a PCL shoulder at 430?nm (2.88?eV) was observed, which is explained by the radiative electron-hole recombination at the MoS2/WS2grain boundaries. The luminescence decay kinetics of the MoS2/WS2 nanoplates appears to be slower than for individual MoS2 and WS2 platelets due to a spatial separation of electrons and holes at MoS2/WS2 junction resulting in extension of recombination time.
333 _aРежим доступа: по договору с организацией-держателем ресурса
461 _tApplied Physics Letters
_d1962-
463 _tVol. 108, iss. 9
_v[093111, 5 p.]
_d2016
610 1 _aэлектронный ресурс
610 1 _aтруды учёных ТПУ
700 1 _aBozheev
_bF. E.
_cspecialist in the field of Electrophysics
_cengineer-researcher of Tomsk Polytechnic University
_f1987-
_gFarabi Esimovich
_2stltpush
_3(RuTPU)RU\TPU\pers\37025
701 1 _aValiev
_bD. T.
_cspecialist in the field of lightning engineering
_cEngineer of Tomsk Polytechnic University
_f1987-
_gDamir Talgatovich
_2stltpush
_3(RuTPU)RU\TPU\pers\33772
701 1 _aNemkaeva
_bR. R.
_gRenata Ruslanovna
712 0 2 _aНациональный исследовательский Томский политехнический университет (ТПУ)
_bИнститут физики высоких технологий (ИФВТ)
_bЛаборатория № 12
_h6389
_2stltpush
_3(RuTPU)RU\TPU\col\19054
712 0 2 _aНациональный исследовательский Томский политехнический университет (ТПУ)
_bИнститут физики высоких технологий (ИФВТ)
_bКафедра лазерной и световой техники (ЛиСТ)
_h65
_2stltpush
_3(RuTPU)RU\TPU\col\18690
801 2 _aRU
_b63413507
_c20160801
_gRCR
856 4 _uhttp://dx.doi.org/10.1063/1.4943144
942 _cCF