Robust Au-PEG/PS Microbeads as Optically Stable Platforms for SERS

被引：28

作者：

Farah, Abdiaziz A. ^{[1
]}

Bravo-Vasquez, Juan P. ^{[2
]}

Alvarez-Puebla, Ramon A. ^{[2
]}

Cho, Jae-Young ^{[2
]}

Fenniri, Hicham ^{[1
]}

机构：

[1] Univ Alberta, Dept Chem, Gunning Lemieux Chem Ctr, Edmonton, AB T6G 2G2, Canada

[2] CNR, Natl Inst Nanotechnol, Edmonton, AB T6G 2M9, Canada

来源：

SMALL | 2009年 / 5卷 / 11期

关键词：

nanocomposites; nanoparticles; polymer microbeads; SERS; ultradetection; ENHANCED RAMAN-SCATTERING; POLY(ETHYLENE OXIDE); METAL NANOPARTICLES; GOLD NANOPARTICLES; SEROTONIN; RELEASE; SPECTROSCOPY; DEPRESSION; CHEMISTRY; SURFACES;

D O I：

10.1002/smll.200801398

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A method to produce a gold nanoparticle (AuNP)-poly(ethylene glycol) PEG/polystyrene nanocomposite (Au-PEG/PS) by chemical modifying PEG-grafted PS microbeads was reported. PEG was used for its excellent capability to selectively retain Au. The PEG/PS microbeads were suspended in the solution of HAuCl4, which accelerated the diffusion of Au(III) ions into the PEG-rich region, where they were reduced by NaBH4. Surface plasmon resonance (SPR) spectroscopy and surface enhanced resonance Raman scattering (SERRS) were performed to examine the optical enhancing properties and material stability. SEM images of the AU-PEG/PS microbeads indicated presence of microspheres of 100-200 μm in diameter characterized by the presence of macropores. The chemical and optical stability, shelf life, reproducibility, and synthetic accessibility made the developed composite materials suitable for SERS-based ultra-detection.

引用

页码：1283 / 1286

页数：4

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