Silver-decorated carbon nanotube networks as SERS substrates

Yi Chieh Chen; Robert J. Young; Julie V. MacPherson; Neil R. Wilson

doi:10.1002/jrs.2862

Silver-decorated carbon nanotube networks as SERS substrates

Yi Chieh Chen, Robert J. Young, Julie V. MacPherson, Neil R. Wilson

Research output: Contribution to journal › Article › peer-review

Abstract

We report on investigations upon a surface-enhanced Raman scattering (SERS) substrate produced from a two-dimensional single-walled carbon nanotube (SWNT) network decorated with Ag nanoparticles. Using the strong and unique Raman spectrum of SWNTs as a reference, the SWNT/Ag nanostructure can be considered to provide two regions: one with an ultrasensitive SERS response for single-molecule SERS (SMSERS) study; and another with uniform SERS enhancement over an area of several square millimeters for general SERS measurements. We report the appearance of an anomalous Raman feature at around 2180 cm -1 in the high-sensitivity region which exhibits the characteristics of SMSERS. The SERS performance of the uniform area was characterized using pyridine vapor adsorbed onto the substrate. The presence of the SWNT/Ag nanostructure enhanced the Raman intensity by over seven orders of magnitude, a factor comparable to or exceeding that obtained on SERS substrates reported by other groups. The results indicate great potential to produce highly sensitive, uniform SERS substrates via further fine-tuning of the nanostructure. Copyright © 2011 John Wiley & Sons, Ltd.

Original language	English
Pages (from-to)	1255-1262
Number of pages	7
Journal	Journal of Raman Spectroscopy
Volume	42
Issue number	6
DOIs	https://doi.org/10.1002/jrs.2862
Publication status	Published - Jun 2011

Keywords

carbon nanotubes
dark-field optical microscopy
electrodeposition
localized surface plasmon resonance
single-molecule SERS detection

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10.1002/jrs.2862

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title = "Silver-decorated carbon nanotube networks as SERS substrates",

abstract = "We report on investigations upon a surface-enhanced Raman scattering (SERS) substrate produced from a two-dimensional single-walled carbon nanotube (SWNT) network decorated with Ag nanoparticles. Using the strong and unique Raman spectrum of SWNTs as a reference, the SWNT/Ag nanostructure can be considered to provide two regions: one with an ultrasensitive SERS response for single-molecule SERS (SMSERS) study; and another with uniform SERS enhancement over an area of several square millimeters for general SERS measurements. We report the appearance of an anomalous Raman feature at around 2180 cm -1 in the high-sensitivity region which exhibits the characteristics of SMSERS. The SERS performance of the uniform area was characterized using pyridine vapor adsorbed onto the substrate. The presence of the SWNT/Ag nanostructure enhanced the Raman intensity by over seven orders of magnitude, a factor comparable to or exceeding that obtained on SERS substrates reported by other groups. The results indicate great potential to produce highly sensitive, uniform SERS substrates via further fine-tuning of the nanostructure. Copyright {\textcopyright} 2011 John Wiley \& Sons, Ltd.",

keywords = "carbon nanotubes, dark-field optical microscopy, electrodeposition, localized surface plasmon resonance, single-molecule SERS detection",

author = "Chen, \{Yi Chieh\} and Young, \{Robert J.\} and MacPherson, \{Julie V.\} and Wilson, \{Neil R.\}",

year = "2011",

month = jun,

doi = "10.1002/jrs.2862",

language = "English",

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pages = "1255--1262",

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AU - Chen, Yi Chieh

AU - Young, Robert J.

AU - MacPherson, Julie V.

AU - Wilson, Neil R.

PY - 2011/6

Y1 - 2011/6

N2 - We report on investigations upon a surface-enhanced Raman scattering (SERS) substrate produced from a two-dimensional single-walled carbon nanotube (SWNT) network decorated with Ag nanoparticles. Using the strong and unique Raman spectrum of SWNTs as a reference, the SWNT/Ag nanostructure can be considered to provide two regions: one with an ultrasensitive SERS response for single-molecule SERS (SMSERS) study; and another with uniform SERS enhancement over an area of several square millimeters for general SERS measurements. We report the appearance of an anomalous Raman feature at around 2180 cm -1 in the high-sensitivity region which exhibits the characteristics of SMSERS. The SERS performance of the uniform area was characterized using pyridine vapor adsorbed onto the substrate. The presence of the SWNT/Ag nanostructure enhanced the Raman intensity by over seven orders of magnitude, a factor comparable to or exceeding that obtained on SERS substrates reported by other groups. The results indicate great potential to produce highly sensitive, uniform SERS substrates via further fine-tuning of the nanostructure. Copyright © 2011 John Wiley & Sons, Ltd.

AB - We report on investigations upon a surface-enhanced Raman scattering (SERS) substrate produced from a two-dimensional single-walled carbon nanotube (SWNT) network decorated with Ag nanoparticles. Using the strong and unique Raman spectrum of SWNTs as a reference, the SWNT/Ag nanostructure can be considered to provide two regions: one with an ultrasensitive SERS response for single-molecule SERS (SMSERS) study; and another with uniform SERS enhancement over an area of several square millimeters for general SERS measurements. We report the appearance of an anomalous Raman feature at around 2180 cm -1 in the high-sensitivity region which exhibits the characteristics of SMSERS. The SERS performance of the uniform area was characterized using pyridine vapor adsorbed onto the substrate. The presence of the SWNT/Ag nanostructure enhanced the Raman intensity by over seven orders of magnitude, a factor comparable to or exceeding that obtained on SERS substrates reported by other groups. The results indicate great potential to produce highly sensitive, uniform SERS substrates via further fine-tuning of the nanostructure. Copyright © 2011 John Wiley & Sons, Ltd.

KW - carbon nanotubes

KW - dark-field optical microscopy

KW - electrodeposition

KW - localized surface plasmon resonance

KW - single-molecule SERS detection

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JO - Journal of Raman Spectroscopy

JF - Journal of Raman Spectroscopy

IS - 6

ER -

Silver-decorated carbon nanotube networks as SERS substrates

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Keywords

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