Mesoporous Au films assembled on flexible cellulose nanopaper as high-performance SERS substrates

Dabum Kim; Jeonghun Kim; Joel Henzie; Youngsang Ko; Hyunsoo Lim; Goomin Kwon; Jongbeom Na; Hyun Jong Kim; Yusuke Yamauchi; Jungmok You

doi:10.1016/j.cej.2021.129445

Mesoporous Au films assembled on flexible cellulose nanopaper as high-performance SERS substrates

Dabum Kim, Jeonghun Kim, Joel Henzie, Youngsang Ko, Hyunsoo Lim, Goomin Kwon, Jongbeom Na, Hyun Jong Kim, Yusuke Yamauchi, Jungmok You

Department of Chemical and Biomolecular Engineering

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

41 Citations (Scopus)

Abstract

The fabrication of nanoarchitectured mesoporous gold films on flexible cellulose nanofiber (CNF) paper is reported for high-performance surface-enhanced Raman scattering (SERS) substrates via an electrochemical deposition method using polymeric micelles. Silver nanowires (AgNWs) are coated onto 2,2,6,6-tetramethylpiperidine-1-oxy-oxidized CNF nanopaper (TEMPO-CNF), and the resulting AgNW@TEMPO-CNF substrate is used as a conductive electrode to guide the thickness-controllable electrodeposition of mesoporous Au. Interestingly, the electrodeposition of mesoporous Au on the AgNW@TEMPO-CNF nanopaper formed a dense network of anisotropic nanoscale creases and channels, whereas deposition on flat Au electrodes makes round mesopores. Numerical simulations performed on both types of structures show that these anisotropic mesopores create more hotspots per unit area than the round mesopore films. Importantly, the mAu@AgNW@TEMPO-CNF nanopaper enables the highly sensitive detection of rhodamine 6G at concentrations as low as 100 fM, with an enhancement factor of 8.72 × 10¹¹ and excellent reproducibility. As a demonstration of their utility in practical chemical detection measurements, the SERS substrates are used to detect the pesticide thiram and a model gas, 2-naphthalenethiol; the detection limits were 10 fM and 1 ppb, respectively. SERS substrates composed of mAu@AgNW@TEMPO-CNF nanopaper may serve as an inexpensive, flexible, and stable chemical detection platform to sense both solution- and gas-phase analytes.

Original language	English
Article number	129445
Journal	Chemical Engineering Journal
Volume	419
DOIs	https://doi.org/10.1016/j.cej.2021.129445
Publication status	Published - 2021 Sept 1

Bibliographical note

Funding Information:
This study was supported by a National Research Foundation of Korea (NRF) grant funded by the Korean government (MSIP) (No.2018R1D1A1B07047874, 2020R1C1C1004459, 2017M3A7B4041987). This research was also supported by Korea Institute of Industrial Technology (KITECH, JE210028). This work was also performed in part at the Queensland node of the Australian National Fabrication Facility (ANFF-Q), a company established under the National Collaborative Research Infrastructure Strategy to provide nano and microfabrication facilities for Australian researchers.

Funding Information:
This study was supported by a National Research Foundation of Korea (NRF) grant funded by the Korean government (MSIP) (No.2018R1D1A1B07047874, 2020R1C1C1004459, 2017M3A7B4041987). This research was also supported by Korea Institute of Industrial Technology (KITECH, JE210028). This work was also performed in part at the Queensland node of the Australian National Fabrication Facility (ANFF-Q), a company established under the National Collaborative Research Infrastructure Strategy to provide nano and microfabrication facilities for Australian researchers.

Publisher Copyright:
© 2021 Elsevier B.V.

All Science Journal Classification (ASJC) codes

Chemistry(all)
Environmental Chemistry
Chemical Engineering(all)
Industrial and Manufacturing Engineering

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10.1016/j.cej.2021.129445

Cite this

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title = "Mesoporous Au films assembled on flexible cellulose nanopaper as high-performance SERS substrates",

abstract = "The fabrication of nanoarchitectured mesoporous gold films on flexible cellulose nanofiber (CNF) paper is reported for high-performance surface-enhanced Raman scattering (SERS) substrates via an electrochemical deposition method using polymeric micelles. Silver nanowires (AgNWs) are coated onto 2,2,6,6-tetramethylpiperidine-1-oxy-oxidized CNF nanopaper (TEMPO-CNF), and the resulting AgNW@TEMPO-CNF substrate is used as a conductive electrode to guide the thickness-controllable electrodeposition of mesoporous Au. Interestingly, the electrodeposition of mesoporous Au on the AgNW@TEMPO-CNF nanopaper formed a dense network of anisotropic nanoscale creases and channels, whereas deposition on flat Au electrodes makes round mesopores. Numerical simulations performed on both types of structures show that these anisotropic mesopores create more hotspots per unit area than the round mesopore films. Importantly, the mAu@AgNW@TEMPO-CNF nanopaper enables the highly sensitive detection of rhodamine 6G at concentrations as low as 100 fM, with an enhancement factor of 8.72 × 1011 and excellent reproducibility. As a demonstration of their utility in practical chemical detection measurements, the SERS substrates are used to detect the pesticide thiram and a model gas, 2-naphthalenethiol; the detection limits were 10 fM and 1 ppb, respectively. SERS substrates composed of mAu@AgNW@TEMPO-CNF nanopaper may serve as an inexpensive, flexible, and stable chemical detection platform to sense both solution- and gas-phase analytes.",

author = "Dabum Kim and Jeonghun Kim and Joel Henzie and Youngsang Ko and Hyunsoo Lim and Goomin Kwon and Jongbeom Na and Kim, {Hyun Jong} and Yusuke Yamauchi and Jungmok You",

note = "Funding Information: This study was supported by a National Research Foundation of Korea (NRF) grant funded by the Korean government (MSIP) (No.2018R1D1A1B07047874, 2020R1C1C1004459, 2017M3A7B4041987). This research was also supported by Korea Institute of Industrial Technology (KITECH, JE210028). This work was also performed in part at the Queensland node of the Australian National Fabrication Facility (ANFF-Q), a company established under the National Collaborative Research Infrastructure Strategy to provide nano and microfabrication facilities for Australian researchers. Funding Information: This study was supported by a National Research Foundation of Korea (NRF) grant funded by the Korean government (MSIP) (No.2018R1D1A1B07047874, 2020R1C1C1004459, 2017M3A7B4041987). This research was also supported by Korea Institute of Industrial Technology (KITECH, JE210028). This work was also performed in part at the Queensland node of the Australian National Fabrication Facility (ANFF-Q), a company established under the National Collaborative Research Infrastructure Strategy to provide nano and microfabrication facilities for Australian researchers. Publisher Copyright: {\textcopyright} 2021 Elsevier B.V.",

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AU - Kim, Jeonghun

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AU - Lim, Hyunsoo

AU - Kwon, Goomin

AU - Na, Jongbeom

AU - Kim, Hyun Jong

AU - Yamauchi, Yusuke

AU - You, Jungmok

N1 - Funding Information: This study was supported by a National Research Foundation of Korea (NRF) grant funded by the Korean government (MSIP) (No.2018R1D1A1B07047874, 2020R1C1C1004459, 2017M3A7B4041987). This research was also supported by Korea Institute of Industrial Technology (KITECH, JE210028). This work was also performed in part at the Queensland node of the Australian National Fabrication Facility (ANFF-Q), a company established under the National Collaborative Research Infrastructure Strategy to provide nano and microfabrication facilities for Australian researchers. Funding Information: This study was supported by a National Research Foundation of Korea (NRF) grant funded by the Korean government (MSIP) (No.2018R1D1A1B07047874, 2020R1C1C1004459, 2017M3A7B4041987). This research was also supported by Korea Institute of Industrial Technology (KITECH, JE210028). This work was also performed in part at the Queensland node of the Australian National Fabrication Facility (ANFF-Q), a company established under the National Collaborative Research Infrastructure Strategy to provide nano and microfabrication facilities for Australian researchers. Publisher Copyright: © 2021 Elsevier B.V.

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N2 - The fabrication of nanoarchitectured mesoporous gold films on flexible cellulose nanofiber (CNF) paper is reported for high-performance surface-enhanced Raman scattering (SERS) substrates via an electrochemical deposition method using polymeric micelles. Silver nanowires (AgNWs) are coated onto 2,2,6,6-tetramethylpiperidine-1-oxy-oxidized CNF nanopaper (TEMPO-CNF), and the resulting AgNW@TEMPO-CNF substrate is used as a conductive electrode to guide the thickness-controllable electrodeposition of mesoporous Au. Interestingly, the electrodeposition of mesoporous Au on the AgNW@TEMPO-CNF nanopaper formed a dense network of anisotropic nanoscale creases and channels, whereas deposition on flat Au electrodes makes round mesopores. Numerical simulations performed on both types of structures show that these anisotropic mesopores create more hotspots per unit area than the round mesopore films. Importantly, the mAu@AgNW@TEMPO-CNF nanopaper enables the highly sensitive detection of rhodamine 6G at concentrations as low as 100 fM, with an enhancement factor of 8.72 × 1011 and excellent reproducibility. As a demonstration of their utility in practical chemical detection measurements, the SERS substrates are used to detect the pesticide thiram and a model gas, 2-naphthalenethiol; the detection limits were 10 fM and 1 ppb, respectively. SERS substrates composed of mAu@AgNW@TEMPO-CNF nanopaper may serve as an inexpensive, flexible, and stable chemical detection platform to sense both solution- and gas-phase analytes.

AB - The fabrication of nanoarchitectured mesoporous gold films on flexible cellulose nanofiber (CNF) paper is reported for high-performance surface-enhanced Raman scattering (SERS) substrates via an electrochemical deposition method using polymeric micelles. Silver nanowires (AgNWs) are coated onto 2,2,6,6-tetramethylpiperidine-1-oxy-oxidized CNF nanopaper (TEMPO-CNF), and the resulting AgNW@TEMPO-CNF substrate is used as a conductive electrode to guide the thickness-controllable electrodeposition of mesoporous Au. Interestingly, the electrodeposition of mesoporous Au on the AgNW@TEMPO-CNF nanopaper formed a dense network of anisotropic nanoscale creases and channels, whereas deposition on flat Au electrodes makes round mesopores. Numerical simulations performed on both types of structures show that these anisotropic mesopores create more hotspots per unit area than the round mesopore films. Importantly, the mAu@AgNW@TEMPO-CNF nanopaper enables the highly sensitive detection of rhodamine 6G at concentrations as low as 100 fM, with an enhancement factor of 8.72 × 1011 and excellent reproducibility. As a demonstration of their utility in practical chemical detection measurements, the SERS substrates are used to detect the pesticide thiram and a model gas, 2-naphthalenethiol; the detection limits were 10 fM and 1 ppb, respectively. SERS substrates composed of mAu@AgNW@TEMPO-CNF nanopaper may serve as an inexpensive, flexible, and stable chemical detection platform to sense both solution- and gas-phase analytes.

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Mesoporous Au films assembled on flexible cellulose nanopaper as high-performance SERS substrates

Abstract

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