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

Peng Chen; Zongyou Yin; Xiao Huang; Shixin Wu; Bo Liedberg; Hua Zhang

doi:10.1021/jp208486m

Assembly of Graphene Oxide and Au_0.7Ag_0.3 Alloy Nanoparticles on SiO₂: A new Raman Substrate with Ultrahigh Signal-to-Background Ratio

Peng Chen
, Zongyou Yin
, Xiao Huang
, Shixin Wu
, Bo Liedberg
, Hua Zhang^*

^*Corresponding author for this work

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

39 Citations (Scopus)

Abstract

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 Au _0.7Ag _0.3 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 Au_0.7Ag _0.3 alloy NPs and that the fluorescence quenching mainly arises from the underlying functionalized GO (FGO) substrate.

Original language	English
Pages (from-to)	24080-24084
Journal	The Journal of Physical Chemistry C
Volume	115
Issue number	49
Online published	16 Nov 2011
DOIs	https://doi.org/10.1021/jp208486m
Publication status	Published - 15 Dec 2011
Externally published	Yes

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@article{5e2242afdcc0443cbe59a8e6dcb8f298,

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

abstract = "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 Au 0.7Ag 0.3 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 Au0.7Ag 0.3 alloy NPs and that the fluorescence quenching mainly arises from the underlying functionalized GO (FGO) substrate. ",

author = "Peng Chen and Zongyou Yin and Xiao Huang and Shixin Wu and Bo Liedberg and Hua Zhang",

year = "2011",

month = dec,

day = "15",

doi = "10.1021/jp208486m",

language = "English",

volume = "115",

pages = "24080--24084",

journal = "The Journal of Physical Chemistry C",

issn = "1932-7447",

publisher = "American Chemical Society",

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}

Assembly of Graphene Oxide and Au_0.7Ag_0.3 Alloy Nanoparticles on SiO₂: A new Raman Substrate with Ultrahigh Signal-to-Background Ratio. / Chen, Peng; Yin, Zongyou; Huang, Xiao et al.
In: The Journal of Physical Chemistry C, Vol. 115, No. 49, 15.12.2011, p. 24080-24084.

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

TY - JOUR

T1 - Assembly of Graphene Oxide and Au0.7 Ag0.3 Alloy Nanoparticles on SiO2

T2 - A new Raman Substrate with Ultrahigh Signal-to-Background Ratio

AU - Chen, Peng

AU - Yin, Zongyou

AU - Huang, Xiao

AU - Wu, Shixin

AU - Liedberg, Bo

AU - Zhang, Hua

PY - 2011/12/15

Y1 - 2011/12/15

N2 - 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 Au 0.7Ag 0.3 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 Au0.7Ag 0.3 alloy NPs and that the fluorescence quenching mainly arises from the underlying functionalized GO (FGO) substrate.

AB - 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 Au 0.7Ag 0.3 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 Au0.7Ag 0.3 alloy NPs and that the fluorescence quenching mainly arises from the underlying functionalized GO (FGO) substrate.

UR - https://www.scopus.com/pages/publications/83455162596

UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-83455162596&origin=recordpage

U2 - 10.1021/jp208486m

DO - 10.1021/jp208486m

M3 - RGC 21 - Publication in refereed journal

SN - 1932-7447

VL - 115

SP - 24080

EP - 24084

JO - The Journal of Physical Chemistry C

JF - The Journal of Physical Chemistry C

IS - 49

ER -