Graphene-Thickness-Dependent Graphene-Enhanced Raman Scattering

doi:10.1021/jp310564d

CORC > 北京大学 > 信息科学技术学院

	Graphene-Thickness-Dependent Graphene-Enhanced Raman Scattering
	Ling, Xi ; Wu, Juanxia ; Xie, Liming ; Zhang, Jin
刊名	journal of physical chemistry c
	2013
关键词	CHARGE-TRANSFER SURFACE SPECTROSCOPY INTENSITY
DOI	10.1021/jp310564d
英文摘要	Graphene-enhanced Raman scattering (GERS), enhancing Raman signals on graphene surface, is an excellent approach to investigate the properties of graphene via the Raman enhancement effect. In the present study, we studied the graphene-thickness dependent GERS in detail. First, by keeping molecule density on few-layer graphene using vacuum thermal deposition method, GERS enhancement was found to be the same for all graphene layers (one to six layers). While adsorbing probe molecules by solution soaking the GERS enhancing factor was different on monolayer and bilayer graphene. By soaking in low concentration solutions, the GERS intensity on bilayer graphene was stronger than that on monolayer graphene, whereas by soaking under high concentration solutions, the GERS intensity difference was much less for that on monolayer and on bilayer. Molecule density, molecular configuration, and GERS enhancing factor are further discussed for molecules on monolayer and bilayer graphene. It was finally concluded that the abnormal graphene-thickness dependence of GERS between monolayer and bilayer graphene was attributed to the different enhancement for GERS on monolayer and bilayer graphene. Monolayer and bilayer graphene have different electronic structure and then doping effect of probe molecules, which shifts the Fermi level of graphenes differently. As a result, monolayer and bilayer graphene have different energy band matching with the probe molecules, yielding different chemical enhancement.; Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; SCI(E); EI; 14; ARTICLE; 5; 2369-2376; 117
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/150802]
专题	信息科学技术学院
推荐引用方式 GB/T 7714	Ling, Xi,Wu, Juanxia,Xie, Liming,et al. Graphene-Thickness-Dependent Graphene-Enhanced Raman Scattering[J]. journal of physical chemistry c,2013.
APA	Ling, Xi,Wu, Juanxia,Xie, Liming,&Zhang, Jin.(2013).Graphene-Thickness-Dependent Graphene-Enhanced Raman Scattering.journal of physical chemistry c.
MLA	Ling, Xi,et al."Graphene-Thickness-Dependent Graphene-Enhanced Raman Scattering".journal of physical chemistry c (2013).