Hybridization of silicon nanowires with TeO2 branch structures and Pt nanoparticles for highly sensitive and selective toluene sensing

Jae Hoon Bang; Myung Sik Choi; Ali Mirzaei; Seungmin Han; Ha Young Lee; Sun Woo Choi; Sang Sub Kim; Hyoun Woo Kim

doi:10.1016/j.apsusc.2020.146620

Hybridization of silicon nanowires with TeO₂ branch structures and Pt nanoparticles for highly sensitive and selective toluene sensing

Jae Hoon Bang, Myung Sik Choi, Ali Mirzaei, Seungmin Han, Ha Young Lee, Sun Woo Choi, Sang Sub Kim, Hyoun Woo Kim

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

18 Scopus citations

Abstract

In this study, based on Si NW-TeO₂ composites sensitized with Pt nanoparticles (NPs), a novel toluene sensor was fabricated. Dense TeO₂ branches formed on the stem of Si NWs, and isolated Pt NPs were dispersed uniformly on the composite surfaces. Several different gases present in exhaled breath (NO₂, CO, C₆H₆, and C₇H₈) at different concentrations were tested at the optimal working temperature (200 °C). To study the role of Pt sensitization on the gas sensing characteristics of the composites, both Si NW-TeO₂ and Si NW-TeO₂/Pt composites were tested. Pt-loaded composite was more sensitive to toluene than Pt-deficient one. A sensing mechanism was proposed. Our results indicate that the inexpensive, fast, and easy-to-use sensor described here has the potential to be employed as a medical diagnostics tool, as well as an environmental monitoring tool.

Original language	English
Article number	146620
Journal	Applied Surface Science
Volume	525
DOIs	https://doi.org/10.1016/j.apsusc.2020.146620
State	Published - 30 Sep 2020

Keywords

Gas sensor
Nanowire
Pt nanoparticle
Silicon
TeO
Toluene

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@article{af8770bd9e53473d9ff64450ddacc383,

title = "Hybridization of silicon nanowires with TeO2 branch structures and Pt nanoparticles for highly sensitive and selective toluene sensing",

abstract = "In this study, based on Si NW-TeO2 composites sensitized with Pt nanoparticles (NPs), a novel toluene sensor was fabricated. Dense TeO2 branches formed on the stem of Si NWs, and isolated Pt NPs were dispersed uniformly on the composite surfaces. Several different gases present in exhaled breath (NO2, CO, C6H6, and C7H8) at different concentrations were tested at the optimal working temperature (200 °C). To study the role of Pt sensitization on the gas sensing characteristics of the composites, both Si NW-TeO2 and Si NW-TeO2/Pt composites were tested. Pt-loaded composite was more sensitive to toluene than Pt-deficient one. A sensing mechanism was proposed. Our results indicate that the inexpensive, fast, and easy-to-use sensor described here has the potential to be employed as a medical diagnostics tool, as well as an environmental monitoring tool.",

keywords = "Gas sensor, Nanowire, Pt nanoparticle, Silicon, TeO, Toluene",

author = "Bang, {Jae Hoon} and Choi, {Myung Sik} and Ali Mirzaei and Seungmin Han and Lee, {Ha Young} and Choi, {Sun Woo} and Kim, {Sang Sub} and Kim, {Hyoun Woo}",

note = "Publisher Copyright: {\textcopyright} 2020",

year = "2020",

month = sep,

day = "30",

doi = "10.1016/j.apsusc.2020.146620",

language = "English",

volume = "525",

journal = "Applied Surface Science",

issn = "0169-4332",

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TY - JOUR

T1 - Hybridization of silicon nanowires with TeO2 branch structures and Pt nanoparticles for highly sensitive and selective toluene sensing

AU - Bang, Jae Hoon

AU - Choi, Myung Sik

AU - Mirzaei, Ali

AU - Han, Seungmin

AU - Lee, Ha Young

AU - Choi, Sun Woo

AU - Kim, Sang Sub

AU - Kim, Hyoun Woo

PY - 2020/9/30

Y1 - 2020/9/30

N2 - In this study, based on Si NW-TeO2 composites sensitized with Pt nanoparticles (NPs), a novel toluene sensor was fabricated. Dense TeO2 branches formed on the stem of Si NWs, and isolated Pt NPs were dispersed uniformly on the composite surfaces. Several different gases present in exhaled breath (NO2, CO, C6H6, and C7H8) at different concentrations were tested at the optimal working temperature (200 °C). To study the role of Pt sensitization on the gas sensing characteristics of the composites, both Si NW-TeO2 and Si NW-TeO2/Pt composites were tested. Pt-loaded composite was more sensitive to toluene than Pt-deficient one. A sensing mechanism was proposed. Our results indicate that the inexpensive, fast, and easy-to-use sensor described here has the potential to be employed as a medical diagnostics tool, as well as an environmental monitoring tool.

AB - In this study, based on Si NW-TeO2 composites sensitized with Pt nanoparticles (NPs), a novel toluene sensor was fabricated. Dense TeO2 branches formed on the stem of Si NWs, and isolated Pt NPs were dispersed uniformly on the composite surfaces. Several different gases present in exhaled breath (NO2, CO, C6H6, and C7H8) at different concentrations were tested at the optimal working temperature (200 °C). To study the role of Pt sensitization on the gas sensing characteristics of the composites, both Si NW-TeO2 and Si NW-TeO2/Pt composites were tested. Pt-loaded composite was more sensitive to toluene than Pt-deficient one. A sensing mechanism was proposed. Our results indicate that the inexpensive, fast, and easy-to-use sensor described here has the potential to be employed as a medical diagnostics tool, as well as an environmental monitoring tool.

KW - Gas sensor

KW - Nanowire

KW - Pt nanoparticle

KW - Silicon

KW - TeO

KW - Toluene

UR - http://www.scopus.com/inward/record.url?scp=85084406040&partnerID=8YFLogxK

U2 - 10.1016/j.apsusc.2020.146620

DO - 10.1016/j.apsusc.2020.146620

M3 - Article

AN - SCOPUS:85084406040

SN - 0169-4332

VL - 525

JO - Applied Surface Science

JF - Applied Surface Science

M1 - 146620

ER -

Hybridization of silicon nanowires with TeO₂ branch structures and Pt nanoparticles for highly sensitive and selective toluene sensing

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