Deciphering surface enhanced Raman scattering activity of gold nanoworms through optical correlations

Hainan Xie, Duncan Graham

Research output: Contribution to journalMeeting abstract

11 Citations (Scopus)

Abstract

Surface enhanced Raman scattering (SERS) "hot spots" are the regions where the electromagnetic field is significantly enhanced, resulting in much greater SERS activity than other areas. Therefore, the engineering and characterization of "hot spots" have attracted much attention. Herein, we have synthesized nanoworms formed by connecting hollow gold nanospheres and investigated their composition as Well is their SERS properties, including their potential for simultaneous analysis of multiple species. The three-dimensional nanostructures that led to different SERS activities were investigated using correlated optical/SERS and SEM imaging. Gold nanoworms with hollow nanosphere segments and partial tube formation were confirmed. All highly SERS-active structures were found to be three-dimensional arrays consisting of inter-/intrananoworm interactions; no individual nanospheres were found to give significant SERS signal under the experimental conditions. The major SERS contribution was found to be the electromagnetic coupling effect within the three-dimensional arrays and the localized surface plasmon resonance of the nanostructure was found to have a minimal effect. This study gives insight into the basis of enhancement for these nanoworm structures and adds to the growing body evidence in relation to nanostructures and surface enhancement of Raman scattering.
LanguageEnglish
Pages-
Number of pages1
JournalAbstracts of papers - American Chemical Society
Volume242
Publication statusPublished - 28 Aug 2011

Fingerprint

Optical correlation
Gold
Raman scattering
Nanospheres
Nanostructures
Electromagnetic coupling
Surface plasmon resonance
Electromagnetic fields
Imaging techniques

Keywords

  • Raman scattering
  • gold nanoworms
  • optical correlations
  • SERS

Cite this

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title = "Deciphering surface enhanced Raman scattering activity of gold nanoworms through optical correlations",
abstract = "Surface enhanced Raman scattering (SERS) {"}hot spots{"} are the regions where the electromagnetic field is significantly enhanced, resulting in much greater SERS activity than other areas. Therefore, the engineering and characterization of {"}hot spots{"} have attracted much attention. Herein, we have synthesized nanoworms formed by connecting hollow gold nanospheres and investigated their composition as Well is their SERS properties, including their potential for simultaneous analysis of multiple species. The three-dimensional nanostructures that led to different SERS activities were investigated using correlated optical/SERS and SEM imaging. Gold nanoworms with hollow nanosphere segments and partial tube formation were confirmed. All highly SERS-active structures were found to be three-dimensional arrays consisting of inter-/intrananoworm interactions; no individual nanospheres were found to give significant SERS signal under the experimental conditions. The major SERS contribution was found to be the electromagnetic coupling effect within the three-dimensional arrays and the localized surface plasmon resonance of the nanostructure was found to have a minimal effect. This study gives insight into the basis of enhancement for these nanoworm structures and adds to the growing body evidence in relation to nanostructures and surface enhancement of Raman scattering.",
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Deciphering surface enhanced Raman scattering activity of gold nanoworms through optical correlations. / Xie, Hainan; Graham, Duncan.

In: Abstracts of papers - American Chemical Society, Vol. 242, 28.08.2011, p. -.

Research output: Contribution to journalMeeting abstract

TY - JOUR

T1 - Deciphering surface enhanced Raman scattering activity of gold nanoworms through optical correlations

AU - Xie, Hainan

AU - Graham, Duncan

PY - 2011/8/28

Y1 - 2011/8/28

N2 - Surface enhanced Raman scattering (SERS) "hot spots" are the regions where the electromagnetic field is significantly enhanced, resulting in much greater SERS activity than other areas. Therefore, the engineering and characterization of "hot spots" have attracted much attention. Herein, we have synthesized nanoworms formed by connecting hollow gold nanospheres and investigated their composition as Well is their SERS properties, including their potential for simultaneous analysis of multiple species. The three-dimensional nanostructures that led to different SERS activities were investigated using correlated optical/SERS and SEM imaging. Gold nanoworms with hollow nanosphere segments and partial tube formation were confirmed. All highly SERS-active structures were found to be three-dimensional arrays consisting of inter-/intrananoworm interactions; no individual nanospheres were found to give significant SERS signal under the experimental conditions. The major SERS contribution was found to be the electromagnetic coupling effect within the three-dimensional arrays and the localized surface plasmon resonance of the nanostructure was found to have a minimal effect. This study gives insight into the basis of enhancement for these nanoworm structures and adds to the growing body evidence in relation to nanostructures and surface enhancement of Raman scattering.

AB - Surface enhanced Raman scattering (SERS) "hot spots" are the regions where the electromagnetic field is significantly enhanced, resulting in much greater SERS activity than other areas. Therefore, the engineering and characterization of "hot spots" have attracted much attention. Herein, we have synthesized nanoworms formed by connecting hollow gold nanospheres and investigated their composition as Well is their SERS properties, including their potential for simultaneous analysis of multiple species. The three-dimensional nanostructures that led to different SERS activities were investigated using correlated optical/SERS and SEM imaging. Gold nanoworms with hollow nanosphere segments and partial tube formation were confirmed. All highly SERS-active structures were found to be three-dimensional arrays consisting of inter-/intrananoworm interactions; no individual nanospheres were found to give significant SERS signal under the experimental conditions. The major SERS contribution was found to be the electromagnetic coupling effect within the three-dimensional arrays and the localized surface plasmon resonance of the nanostructure was found to have a minimal effect. This study gives insight into the basis of enhancement for these nanoworm structures and adds to the growing body evidence in relation to nanostructures and surface enhancement of Raman scattering.

KW - Raman scattering

KW - gold nanoworms

KW - optical correlations

KW - SERS

UR - http://dx.doi.org/10.1021/jp207645b

M3 - Meeting abstract

VL - 242

SP - -

JO - Abstracts of papers - American Chemical Society

T2 - Abstracts of papers - American Chemical Society

JF - Abstracts of papers - American Chemical Society

SN - 0065-7727

ER -