Production of efficient sers substrates by depositing gold over a polystyrene beads template

Química Nova

Sant'Ana, Antônio Carlos¹  Santos, Diego Pereira dos¹  Universidade de São Paulo, São Paulo, Brasil¹  Temperini, Marcia L. A.¹  Andrade, Gustavo Fernandes Souza¹ 

关键词: SERS;    nanostructured Au substrate;    single-molecule detection.;   

DOI  :  10.1590/S0100-40422010001000017

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 摘 要 】

This work reports on the SERS activity of a nanostructured substrate that was obtained by electrodepositing gold over a template consisting of polystyrene microspheres. This substrate displayed superior SERS performance for the detection of 4-merctaptopyridine as compared to a conventional roughened Au electrode. In order to investigate the substrate capability for the detection at low concentration limits, a series of Rhodamine 6G (1 nM) spectra were registered. Our spectral dynamics data is in agreement with single-molecule behavior, showing that the control over the substrate morphology is crucial to enable the production of highly reproducible and sensitive SERS substrates.

【 授权许可】

Unknown