Tuning SERS properties of pattern-based MWNTs-AuNPs substrates by adjustment of the pattern spacings

Hui Mei; Xing Zhao; Shenwei Bai; Qingwen Li; Junchao Xia; Haili Bai; Laifei Cheng

doi:10.1016/j.carbon.2018.04.054

Tuning SERS properties of pattern-based MWNTs-AuNPs substrates by adjustment of the pattern spacings

Hui Mei, Xing Zhao, Shenwei Bai, Qingwen Li, Junchao Xia, Haili Bai, Laifei Cheng

School of Materials Sience and Engineering

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

17 Scopus citations

Abstract

Vertically-aligned multi-walled carbon nanotubes (MWNTs) arrays were designed with different pattern spacings on silicon wafer and tunable three-dimensional (3D) surface-enhanced Raman scattering (SERS) substrates were fabricated by decorating the patterned MWNTs arrays with gold nanoparticles (AuNPs) via magnetron sputtering and annealing. SERS substrates with large amounts of “hot spots” were achieved by adjusting the thickness of sputtered gold film. The microstructure of MWNTs-AuNPs hybrid materials were examined under scanning electron microscopy (SEM) and transmission electron microscope (TEM). The Raman scattering behavior of MWNTs arrays was systematically investigated. Surface-enhanced Raman scattering property of MWNTs-AuNPs was demonstrated using molecular probes Rhodamine 6G (R6G) solutions as standard analyte and the pattern spacing was found to significantly affect Raman intensity. MWNTs-AuNPs substrates with pattern spacing of 100 nm were used to evaluate the SERS property of the material and the detection concentration level was found as low as 10⁻¹⁰ M.

Original language	English
Pages (from-to)	38-45
Number of pages	8
Journal	Carbon
Volume	136
DOIs	https://doi.org/10.1016/j.carbon.2018.04.054
State	Published - Sep 2018

Keywords

Au nanoparticles
Patterned MWNTs arrays
Raman spectroscopy
Surface-enhanced Raman scattering (SERS)

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10.1016/j.carbon.2018.04.054

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@article{e20baece01be45a98e269a2cc79570d6,

title = "Tuning SERS properties of pattern-based MWNTs-AuNPs substrates by adjustment of the pattern spacings",

abstract = "Vertically-aligned multi-walled carbon nanotubes (MWNTs) arrays were designed with different pattern spacings on silicon wafer and tunable three-dimensional (3D) surface-enhanced Raman scattering (SERS) substrates were fabricated by decorating the patterned MWNTs arrays with gold nanoparticles (AuNPs) via magnetron sputtering and annealing. SERS substrates with large amounts of “hot spots” were achieved by adjusting the thickness of sputtered gold film. The microstructure of MWNTs-AuNPs hybrid materials were examined under scanning electron microscopy (SEM) and transmission electron microscope (TEM). The Raman scattering behavior of MWNTs arrays was systematically investigated. Surface-enhanced Raman scattering property of MWNTs-AuNPs was demonstrated using molecular probes Rhodamine 6G (R6G) solutions as standard analyte and the pattern spacing was found to significantly affect Raman intensity. MWNTs-AuNPs substrates with pattern spacing of 100 nm were used to evaluate the SERS property of the material and the detection concentration level was found as low as 10−10 M.",

keywords = "Au nanoparticles, Patterned MWNTs arrays, Raman spectroscopy, Surface-enhanced Raman scattering (SERS)",

author = "Hui Mei and Xing Zhao and Shenwei Bai and Qingwen Li and Junchao Xia and Haili Bai and Laifei Cheng",

note = "Publisher Copyright: {\textcopyright} 2018 Elsevier Ltd",

year = "2018",

month = sep,

doi = "10.1016/j.carbon.2018.04.054",

language = "英语",

volume = "136",

pages = "38--45",

journal = "Carbon",

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T1 - Tuning SERS properties of pattern-based MWNTs-AuNPs substrates by adjustment of the pattern spacings

AU - Mei, Hui

AU - Zhao, Xing

AU - Bai, Shenwei

AU - Li, Qingwen

AU - Xia, Junchao

AU - Bai, Haili

AU - Cheng, Laifei

PY - 2018/9

Y1 - 2018/9

N2 - Vertically-aligned multi-walled carbon nanotubes (MWNTs) arrays were designed with different pattern spacings on silicon wafer and tunable three-dimensional (3D) surface-enhanced Raman scattering (SERS) substrates were fabricated by decorating the patterned MWNTs arrays with gold nanoparticles (AuNPs) via magnetron sputtering and annealing. SERS substrates with large amounts of “hot spots” were achieved by adjusting the thickness of sputtered gold film. The microstructure of MWNTs-AuNPs hybrid materials were examined under scanning electron microscopy (SEM) and transmission electron microscope (TEM). The Raman scattering behavior of MWNTs arrays was systematically investigated. Surface-enhanced Raman scattering property of MWNTs-AuNPs was demonstrated using molecular probes Rhodamine 6G (R6G) solutions as standard analyte and the pattern spacing was found to significantly affect Raman intensity. MWNTs-AuNPs substrates with pattern spacing of 100 nm were used to evaluate the SERS property of the material and the detection concentration level was found as low as 10−10 M.

AB - Vertically-aligned multi-walled carbon nanotubes (MWNTs) arrays were designed with different pattern spacings on silicon wafer and tunable three-dimensional (3D) surface-enhanced Raman scattering (SERS) substrates were fabricated by decorating the patterned MWNTs arrays with gold nanoparticles (AuNPs) via magnetron sputtering and annealing. SERS substrates with large amounts of “hot spots” were achieved by adjusting the thickness of sputtered gold film. The microstructure of MWNTs-AuNPs hybrid materials were examined under scanning electron microscopy (SEM) and transmission electron microscope (TEM). The Raman scattering behavior of MWNTs arrays was systematically investigated. Surface-enhanced Raman scattering property of MWNTs-AuNPs was demonstrated using molecular probes Rhodamine 6G (R6G) solutions as standard analyte and the pattern spacing was found to significantly affect Raman intensity. MWNTs-AuNPs substrates with pattern spacing of 100 nm were used to evaluate the SERS property of the material and the detection concentration level was found as low as 10−10 M.

KW - Au nanoparticles

KW - Patterned MWNTs arrays

KW - Raman spectroscopy

KW - Surface-enhanced Raman scattering (SERS)

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U2 - 10.1016/j.carbon.2018.04.054

DO - 10.1016/j.carbon.2018.04.054

M3 - 文章

AN - SCOPUS:85055735349

SN - 0008-6223

VL - 136

SP - 38

EP - 45

JO - Carbon

JF - Carbon

ER -

Tuning SERS properties of pattern-based MWNTs-AuNPs substrates by adjustment of the pattern spacings

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Keywords

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