Excellent surface enhanced Raman scattering obtained with nanoporous gold fabricated by chemical de-alloying

被引：25

作者：

Xue, Yanpeng ^{[1
]}

Scaglione, Federico

Paschalidou, Eirini Maria

Rizzi, Paola

Battezzati, Livio

机构：

[1] Univ Torino, Dipartimento Chim, Via Pietro Giuria 7, I-10125 Turin, Italy

来源：

CHEMICAL PHYSICS LETTERS | 2016年 / 665卷

关键词：

Nanoporous gold; Chemical de-alloying; Metallic glass; Raman scattering; MOLECULES; SERS; NANOPARTICLES; PRECURSOR; CORROSION; EVOLUTION; SILVER;

D O I：

10.1016/j.cplett.2016.10.046

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：

Three dimensional nanoporous gold, with an average ligament size of 50 nm, was fabricated by chemical de-alloying from a new Au based metallic glass precursor. The resultant nanoporous gold gives rise to superior surface enhanced Raman scattering (SERS) capability using 4,40-bi-pyridine as probe molecules. The SERS intensity mapping images confirm the presence of hot spots. A low detection limit down to 10 (14) M for bipyridine was achieved, which is attributed to the localized enhanced electromagnetic fields around nano-sized ligaments, the electromagnetic coupling between ligaments, and the trapped SERS sensitive atoms. (C) 2016 Elsevier B.V. All rights reserved.

引用

页码：6 / 9

页数：4

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