The gas sensing properties of single-walled carbon nanotubes deposited on an aminosilane monolayer

Thu Hong Tran; Jin Woo Lee; Kyongsoo Lee; Yang Doo Lee; Byeong Kwon Ju

doi:10.1016/j.snb.2007.07.104

The gas sensing properties of single-walled carbon nanotubes deposited on an aminosilane monolayer

Thu Hong Tran, Jin Woo Lee, Kyongsoo Lee, Yang Doo Lee, Byeong Kwon Ju

School of Electrical Engineering

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

31 Citations (Scopus)

Abstract

This paper presents our study on the effects of an aminosilane monolayer on the gas sensing properties of single-walled carbon nanotubes (SWCNTs). A gas sensor for nitrogen dioxide (NO₂) detection was fabricated by conventional photolithography process on an oxidized silicon wafer functionalized with 3-aminopropyltriethoxysilane (APTES). Such a CNT-based gas sensor was found to result in high sensitivity and fast response time compared with the sensor fabricated on a non-silanised surface. The amine groups in the APTES monolayer, electron donating in nature, played a role of charge transfer to the semiconducting SWCNTs, and hence the amount of electrons transferred from SWCNTs to NO₂ molecules increased. Our results suggest that the APTES intended originally for selective placement of individual SWCNTs could be used to enhance the gas sensing properties of the SWCNTs.

Original language	English
Pages (from-to)	67-71
Number of pages	5
Journal	Sensors and Actuators, B: Chemical
Volume	129
Issue number	1
DOIs	https://doi.org/10.1016/j.snb.2007.07.104
Publication status	Published - 2008 Jan 29

Keywords

Electron donation
Gas sensor
Nitrogen dioxide (NO)
Self-assembled monolayer (SAM)
Single-walled carbon nanotubes (SWCNTs)

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Instrumentation
Condensed Matter Physics
Surfaces, Coatings and Films
Metals and Alloys
Electrical and Electronic Engineering
Materials Chemistry

Access to Document

10.1016/j.snb.2007.07.104

Cite this

@article{c9206d2149d740aab069e90d0592840b,

title = "The gas sensing properties of single-walled carbon nanotubes deposited on an aminosilane monolayer",

abstract = "This paper presents our study on the effects of an aminosilane monolayer on the gas sensing properties of single-walled carbon nanotubes (SWCNTs). A gas sensor for nitrogen dioxide (NO2) detection was fabricated by conventional photolithography process on an oxidized silicon wafer functionalized with 3-aminopropyltriethoxysilane (APTES). Such a CNT-based gas sensor was found to result in high sensitivity and fast response time compared with the sensor fabricated on a non-silanised surface. The amine groups in the APTES monolayer, electron donating in nature, played a role of charge transfer to the semiconducting SWCNTs, and hence the amount of electrons transferred from SWCNTs to NO2 molecules increased. Our results suggest that the APTES intended originally for selective placement of individual SWCNTs could be used to enhance the gas sensing properties of the SWCNTs.",

keywords = "Electron donation, Gas sensor, Nitrogen dioxide (NO), Self-assembled monolayer (SAM), Single-walled carbon nanotubes (SWCNTs)",

author = "Tran, {Thu Hong} and Lee, {Jin Woo} and Kyongsoo Lee and Lee, {Yang Doo} and Ju, {Byeong Kwon}",

note = "Funding Information: This work was supported in part by MIC and IITA through the IT Leading R&D Support Project. The authors thank the government for financial support. ",

year = "2008",

month = jan,

day = "29",

doi = "10.1016/j.snb.2007.07.104",

language = "English",

volume = "129",

pages = "67--71",

journal = "Sensors and Actuators, B: Chemical",

issn = "0925-4005",

publisher = "Elsevier",

number = "1",

}

TY - JOUR

T1 - The gas sensing properties of single-walled carbon nanotubes deposited on an aminosilane monolayer

AU - Tran, Thu Hong

AU - Lee, Jin Woo

AU - Lee, Kyongsoo

AU - Lee, Yang Doo

AU - Ju, Byeong Kwon

N1 - Funding Information: This work was supported in part by MIC and IITA through the IT Leading R&D Support Project. The authors thank the government for financial support.

PY - 2008/1/29

Y1 - 2008/1/29

N2 - This paper presents our study on the effects of an aminosilane monolayer on the gas sensing properties of single-walled carbon nanotubes (SWCNTs). A gas sensor for nitrogen dioxide (NO2) detection was fabricated by conventional photolithography process on an oxidized silicon wafer functionalized with 3-aminopropyltriethoxysilane (APTES). Such a CNT-based gas sensor was found to result in high sensitivity and fast response time compared with the sensor fabricated on a non-silanised surface. The amine groups in the APTES monolayer, electron donating in nature, played a role of charge transfer to the semiconducting SWCNTs, and hence the amount of electrons transferred from SWCNTs to NO2 molecules increased. Our results suggest that the APTES intended originally for selective placement of individual SWCNTs could be used to enhance the gas sensing properties of the SWCNTs.

AB - This paper presents our study on the effects of an aminosilane monolayer on the gas sensing properties of single-walled carbon nanotubes (SWCNTs). A gas sensor for nitrogen dioxide (NO2) detection was fabricated by conventional photolithography process on an oxidized silicon wafer functionalized with 3-aminopropyltriethoxysilane (APTES). Such a CNT-based gas sensor was found to result in high sensitivity and fast response time compared with the sensor fabricated on a non-silanised surface. The amine groups in the APTES monolayer, electron donating in nature, played a role of charge transfer to the semiconducting SWCNTs, and hence the amount of electrons transferred from SWCNTs to NO2 molecules increased. Our results suggest that the APTES intended originally for selective placement of individual SWCNTs could be used to enhance the gas sensing properties of the SWCNTs.

KW - Electron donation

KW - Gas sensor

KW - Nitrogen dioxide (NO)

KW - Self-assembled monolayer (SAM)

KW - Single-walled carbon nanotubes (SWCNTs)

UR - http://www.scopus.com/inward/record.url?scp=38149070929&partnerID=8YFLogxK

U2 - 10.1016/j.snb.2007.07.104

DO - 10.1016/j.snb.2007.07.104

M3 - Article

AN - SCOPUS:38149070929

SN - 0925-4005

VL - 129

SP - 67

EP - 71

JO - Sensors and Actuators, B: Chemical

JF - Sensors and Actuators, B: Chemical

IS - 1

ER -

The gas sensing properties of single-walled carbon nanotubes deposited on an aminosilane monolayer

Abstract

Keywords

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this