Assembly of Graphene Oxide and Au0.7Ag0.3 Alloy Nanoparticles on SiO2: A New Raman Substrate with Ultrahigh Signal-to-Background Ratio

被引：39

作者：

Chen, Peng ^{[1
,2
]}

Yin, Zongyou ^{[1
]}

Huang, Xiao ^{[1
]}

Wu, Shixin ^{[1
]}

Liedberg, Bo ^{[2
,3
]}

Zhang, Hua ^{[1
,2
]}

机构：

[1] Nanyang Technol Univ, Sch Mat Sci & Engn, Singapore 639798, Singapore

[2] Nanyang Technol Univ, Ctr Biomimet Sensor Sci, Singapore 637553, Singapore

[3] Linkoping Univ, Dept Phys Chem & Biol IFM, SE-58183 Linkoping, Sweden

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2011年 / 115卷 / 49期

基金：

瑞典研究理事会;

关键词：

METAL NANOPARTICLES; GRAPHITE OXIDE; SURFACE; SPECTROSCOPY; SCATTERING; RESONANCE; FILMS; GOLD; ENHANCEMENT; MOLECULES;

D O I：

10.1021/jp208486m

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：

Resonance Raman spectroscopy (RRS) often suffers from the large fluorescence background which obscures the much weaker Raman scattering. To address this fundamental problem, a novel Raman substrate has been fabricated by adsorption of Au0.7Ag0.3 alloy nanoparticles (NPs) on a graphene oxide (GO) coated SiO2 surface, which offers both excellent Raman enhancement and fluorescence quenching. Our experimental data reveal that a Raman to fluorescence background intensity ratio of 1.6 can be obtained for a highly fluorescent dye like Alexa fluor 488. Moreover, we demonstrate that the Raman enhancement mainly originates from the Au0.7Ag0.3 alloy NPs and that the fluorescence quenching mainly arises from the underlying functionalized GO (FGO) substrate.

引用

页码：24080 / 24084

页数：5

共 46 条

[1] A multiple-ligand approach to extending the dynamic range of analyte quantification in protein microarrays [J].

Andersson, Olof ;

Nikkinen, Henrik ;

Kanmert, Daniel ;

Enander, Karin .

BIOSENSORS & BIOELECTRONICS, 2009, 24 (08) :2458-2464

[2] Carbon nanotubes with covalently linked porphyrin antennae: Photoinduced electron transfer [J].

Baskaran, D ;

Mays, JW ;

Zhang, XP ;

Bratcher, MS .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2005, 127 (19) :6916-6917

[3] Raman, polarized Raman and ultraviolet resonance Raman spectroscopy of nucleic acids and their complexes [J].

Benevides, JM ;

Overman, SA ;

Thomas, GJ .

JOURNAL OF RAMAN SPECTROSCOPY, 2005, 36 (04) :279-299

[4] Electronic confinement and coherence in patterned epitaxial graphene [J].

Berger, Claire ;

Song, Zhimin ;

Li, Xuebin ;

Wu, Xiaosong ;

Brown, Nate ;

Naud, Cecile ;

Mayou, Didier ;

Li, Tianbo ;

Hass, Joanna ;

Marchenkov, Atexei N. ;

Conrad, Edward H. ;

First, Phillip N. ;

de Heer, Wait A. .

SCIENCE, 2006, 312 (5777) :1191-1196

[5] Surface-enhanced Raman scattering [J].

Campion, A ;

Kambhampati, P .

CHEMICAL SOCIETY REVIEWS, 1998, 27 (04) :241-250

[6] Nanoparticles with Raman spectroscopic fingerprints for DNA and RNA detection [J].

Cao, YWC ;

Jin, RC ;

Mirkin, CA .

SCIENCE, 2002, 297 (5586) :1536-1540

[7]

Colthup N. B., 1964, INTRO INFRARED RAMAN

[8] The chemistry of graphene oxide [J].

Dreyer, Daniel R. ;

Park, Sungjin ;

Bielawski, Christopher W. ;

Ruoff, Rodney S. .

CHEMICAL SOCIETY REVIEWS, 2010, 39 (01) :228-240

[9] Large-area ultrathin films of reduced graphene oxide as a transparent and flexible electronic material [J].

Eda, Goki ;

Fanchini, Giovanni ;

Chhowalla, Manish .

NATURE NANOTECHNOLOGY, 2008, 3 (05) :270-274

[10] Why gold nanoparticles are more precious than pretty gold: Noble metal surface plasmon resonance and its enhancement of the radiative and nonradiative properties of nanocrystals of different shapes [J].

Eustis, S ;

El-Sayed, MA .

CHEMICAL SOCIETY REVIEWS, 2006, 35 (03) :209-217

← 1 2 3 4 5 →