Ultraflat Transparent Gold Nanoplates - Ideal Substrates for Tip-enhanced Raman Scattering Experiments

被引：97

作者：

Deckert-Gaudig, Tanja ^{[1
]}

Deckert, Volker ^{[1
,2
]}

机构：

[1] ISAS Inst Analyt Sci, D-44139 Dortmund, Germany

[2] Tech Univ Dortmund, D-44227 Dortmund, Germany

来源：

SMALL | 2009年 / 5卷 / 04期

关键词：

amino acids; gold; nanocrystalline materials; Raman spectroscopy; surface analysis; AMINO-ACIDS; HYDROTHERMAL ROUTE; AU NANOPARTICLES; SPECTROSCOPY; SERS; ADSORPTION; CYSTEINE; FIELD; SIZE; DFT;

D O I：

10.1002/smll.200801237

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The ultraflat gold nanoplates as effective substrates for tip-enhanced Raman scattering (TERS) measurements was investigated by conducting TERS experiments on immobilized biomolecules on a single transparent gold nanoplate. The gold nanoplates with a height of around 20 nm were considered to be ideal substrates for the immobilization of cystine in order to measure TERS spectra in black-reflection geometry. Researchers considered a model substance, cystine, which played an important role in building and stabilizing the tertiary structure in proteins. SEM and AFM was employed for size characterization of the nanoplates with a standard roughness on the gold of 120 pm root mean square, and 400 pm maximum peak-to-peak variation. Proposed illumination geometry as compared to the side reflection geometries exhibited better collection efficiency that can be obtained by using high numerical aperture microscope objectives or even oil immersion objectives.

引用

页码：432 / 436

页数：5