中国科学院重庆绿色智能技术研究院机构知识库

QQ客服 官方微博 反馈留言

	Unraveling the Raman Enhancement Mechanism on 1T′-Phase ReS2Nanosheets
	Miao, Peng1; Qin, Jing-Kai2; Shen, Yunfeng1; Su, Huimin3; Dai, Junfeng3; Song, Bo4; Du, Yunchen1; Sun, Mengtao5; Zhang, Wei6; Wang, Hsing-Lin3
	2018
摘要	2D transition metal dichalcogenides materials are explored as potential surface-enhanced Raman spectroscopy substrates. Herein, a systematic study of the Raman enhancement mechanism on distorted 1T (1T′) rhenium disulfide (ReS2) nanosheets is demonstrated. Combined Raman and photoluminescence studies with the introduction of an Al2O3dielectric layer unambiguously reveal that Raman enhancement on ReS2materials is from a charge transfer process rather than from an energy transfer process, and Raman enhancement is inversely proportional while the photoluminescence quenching effect is proportional to the layer number (thickness) of ReS2nanosheets. On monolayer ReS2film, a strong resonance-enhanced Raman scattering effect dependent on the laser excitation energy is detected, and a detection limit as low as 10−9m can be reached from the studied dye molecules such as rhodamine 6G and methylene blue. Such a high enhancement factor achieved through enhanced charge interaction between target molecule and substrate suggests that with careful consideration of the layer-number-dependent feature and excitation-energy-related resonance effect, ReS2is a promising Raman enhancement platform for sensing applications. © 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
DOI	10.1002/smll.201704079
发表期刊	Small
ISSN	16136810
卷号	14期号:14
收录类别	EI
语种	英语
EISSN	16136829