A sensitive SERS substrate based on Au/TiO2/Au nanosheets

Li Jiang; Xiu Liang; Tingting You; Penggang Yin; Hua Wang; Lin Guo; Shihe Yang

doi:10.1016/j.saa.2015.01.040

A sensitive SERS substrate based on Au/TiO2/Au nanosheets

Spectrochim Acta A Mol Biomol Spectrosc. 2015 May 5:142:50-4. doi: 10.1016/j.saa.2015.01.040. Epub 2015 Jan 28.

Authors

Li Jiang¹, Xiu Liang¹, Tingting You¹, Penggang Yin², Hua Wang¹, Lin Guo³, Shihe Yang⁴

Affiliations

¹ Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education, School of Chemistry and Environment, Beihang University, Beijing 100191, China.
² Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education, School of Chemistry and Environment, Beihang University, Beijing 100191, China. Electronic address: [email protected].
³ Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education, School of Chemistry and Environment, Beihang University, Beijing 100191, China. Electronic address: [email protected].
⁴ Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education, School of Chemistry and Environment, Beihang University, Beijing 100191, China; Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China. Electronic address: [email protected].

PMID: 25699693
DOI: 10.1016/j.saa.2015.01.040

Abstract

Sensitive SERS substrates based on Au/TiO2/Au nanosheet have been prepared by physically sputtering Au nanoparticles onto fabricated TiO2 nanosheets. The Au/TiO2/Au nanosheets show much stronger SERS signal as compared to normal Au/Ti substrates by increasing surface area and effectively inducing plasmonic coupling between adjoining Au nanoparticles. In addition, influence factors such as concentration of probe solution and deposition time of gold nanoparticles were discussed. This study provides an easy-prepared and label-free substrate for the detection of biomolecule.

Keywords: Adenine; AuNPs; PMBA; SERS; TiO(2).

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Adenine / chemistry
Benzoates / chemistry
Gold / chemistry*
Nanostructures / chemistry*
Nanostructures / ultrastructure
Spectrum Analysis, Raman / methods*
Sulfhydryl Compounds / chemistry
Titanium / chemistry*

Substances

Benzoates
Sulfhydryl Compounds
4-mercaptobenzoate
titanium dioxide
Gold
Titanium
Adenine