Surface enhanced Raman spectroscopy of aromatic compounds on silver nanoclusters

被引：36

作者：

Fleger, Y. ^{[1
,2
]}

Mastai, Y. ^{[2
,3
]}

Rosenbluh, M. ^{[1
,2
]}

Dressler, D. H. ^{[2
,3
]}

机构：

[1] Bar Ilan Univ, Dept Phys, Jack & Pearl Resnick Inst Adv Technol, IL-52900 Ramat Gan, Israel

[2] Bar Ilan Univ, Inst Nanotechnol & Adv Mat, IL-52900 Ramat Gan, Israel

[3] Bar Ilan Univ, Dept Chem, IL-52900 Ramat Gan, Israel

来源：

SURFACE SCIENCE | 2009年 / 603卷 / 05期

关键词：

Raman scattering spectroscopy; Surface enhanced Raman scattering; X-ray photoelectron spectroscopy; Self assembly; Aromatics; Thiols; SELF-ASSEMBLED MONOLAYERS; 4-MERCAPTOBENZOIC ACID; SCATTERING SERS; LONG-RANGE; DISTANCE DEPENDENCE; GOLD; ADSORPTION; XPS; NANOPARTICLES; DEPOSITION;

D O I：

10.1016/j.susc.2009.01.020

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Surface enhanced Raman spectroscopy (SERS) has been used to characterize multilayers of three different aromatic compounds in the proximity of silver nanoclusters. SERS of mercapto benzoic acid (MBA), which adsorbs onto the silver nanoclusters through the sulfur moiety, exhibits frequency shifts in comparison to the Raman spectrum of crystalline MBA. Conversely, benzoic acid and benzophenone that adsorb through the oxygen species lack these frequency shifts, and show only a typical SERS enhancement. We employed X-ray photoelectron spectroscopy (XPS), to probe the nature of the binding between the silver and the three different aromatic compounds. Thereafter, we assigned the major Raman peaks of all three molecules to specific molecular vibrations. Overall, this enables us to determine the origin of the observed shifts in the SERS spectrum of MBA and similar molecules. (c) 2009 Elsevier B.V. All rights reserved.

引用

页码：788 / 793

页数：6

共 62 条

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