Activated vibrational modes and Fermi resonance in tip-enhanced Raman spectroscopy

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	Activated vibrational modes and Fermi resonance in tip-enhanced Raman spectroscopy
	Sun, MT ; Fang, YR ; Zhang, ZY ; Xu, HX
刊名	PHYSICAL REVIEW E
	2013
卷号	87 期号:2
ISSN号	1539-3755
通讯作者	Xu, HX (reprint author), Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, POB 603-146, Beijing 100190, Peoples R China.
中文摘要	Using p-aminothiophenol (PATP) molecules on a gold substrate and high-vacuum tip-enhanced Raman spectroscopy (HV-TERS), we show that the vibrational spectra of these molecules are distinctly different from those in typical surface-enhanced Raman spectroscopy. Detailed first-principles calculations help to assign the Raman peaks in the TERS measurements as Raman-active and IR-active vibrational modes of dimercaptoazobenzene (DMAB), providing strong spectroscopic evidence for the dimerization of PATP molecules to DMAB under the TERS setup. The activation of the IR-active modes is due to enhanced electromagnetic field gradient effects within the gap region of the highly asymmetric tip-surface geometry. Fermi resonances are also observed in HV-TERS. These findings help to broaden the versatility of TERS as a promising technique for ultrasensitive molecular spectroscopy. DOI:10.1103/PhysRevE.87.020401
资助信息	National Basic Research Project of China [2012YQ12006005, 2009CB930701, 2009CB930704, 2007CB936804]; National Natural Science Foundation of China [90923003, 10874233, 10874234, 20703064, 11034006, 11227407]; CAS [KJCX2-EW-W04]; U.S. National Science Foundation [0906025]; U.S. Department of Energy, Basic Energy Sciences, Materials Sciences and Engineering Division; Nanometer Structure Consortium at Lund University, nmC@LU
语种	英语
公开日期	2014-01-16
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/56760]
专题	物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文
推荐引用方式 GB/T 7714	Sun, MT,Fang, YR,Zhang, ZY,et al. Activated vibrational modes and Fermi resonance in tip-enhanced Raman spectroscopy[J]. PHYSICAL REVIEW E,2013,87(2).
APA	Sun, MT,Fang, YR,Zhang, ZY,&Xu, HX.(2013).Activated vibrational modes and Fermi resonance in tip-enhanced Raman spectroscopy.PHYSICAL REVIEW E,87(2).
MLA	Sun, MT,et al."Activated vibrational modes and Fermi resonance in tip-enhanced Raman spectroscopy".PHYSICAL REVIEW E 87.2(2013).