Creating Well-Defined Hot Spots for Surface-Enhanced Raman Scattering by Single-Crystalline Noble Metal Nanowire Pairs

被引：56

作者：

Kang, Taejoon ^{[2
]}

Yoon, Ilsun ^{[2
]}

Jeon, Ki-Seok ^{[1
]}

Choi, Wonjun ^{[3
]}

Lee, Yonghoon ^{[4
]}

Seo, Kwanyong ^{[2
]}

Yoo, Youngdong ^{[2
]}

Park, Q-Han ^{[3
]}

Ihee, Hyotcherl ^{[2
]}

Suh, Yung Doug ^{[1
]}

Kim, Bongsoo ^{[2
]}

机构：

[1] KRICT, Div Adv Chem Mat, Taejon 305600, South Korea

[2] Korea Adv Inst Sci & Technol, Dept Chem, Taejon 305701, South Korea

[3] Korea Univ, Dept Phys, Seoul 136701, South Korea

[4] Gwangju Inst Sci & Technol, Adv Photon Res Inst, Kwangju 500712, South Korea

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2009年 / 113卷 / 18期

基金：

瑞典研究理事会;

关键词：

SPECTROSCOPY; MOLECULES; NANOPARTICLES; MONOLAYERS; JUNCTIONS; AFM;

D O I：

10.1021/jp809391c

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：

Well-defined surface-enhanced Raman scattering (SERS) active systems were fabricated by single-crystal line noble metal nanowires. Crossed and parallel nanowire pairs were constructed by using a nanomanipulator to create SERS hot spots in the form of nanowire junction. SERS spectra of brilliant cresyl blue (BCB), p-mercaptoaniline (pMA), and p-mercaptobenzoic acid (pMBA) were observed at the junction of two nanowires. The SERS enhancement and polarization dependence are correlated well with the enhanced electric field intensities calculated by the finite difference time domain (FDTD) method for specific nanowire geometries. These simple and effective SERS active systems have a practical advantage that the hot spots can be readily located and visualized by an optical microscope. These well-defined SERS active systems based on noble metal nanowires can be further developed to find applications in a variety of biological and chemical sensing.

引用

页码：7492 / 7496

页数：5

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