Optimization of the surface coverage of metal nanoparticles on nanowires gas sensors to achieve the optimal sensing performance

Jae Hyoung Lee, Ali Mirzaei, Jin Young Kim, Jae Hun Kim, Hyoun Woo Kim, Sang Sub Kim

Research output: Contribution to journalArticle

Abstract

The functionalization of noble metal nanoparticles (NPs) is a highly efficient method for increasing the sensing performance of metal oxide nanowire (NWs) gas sensors. Despite the well-established strategy, the level of the optimal functionalization for obtaining the maximum sensing response has rarely been reported. Herein, the surfaces of SnO2 NWs were functionalized with Pt and Pd NPs, and the gas sensing characteristics were then investigated using NO2 as an example gas. The sensing responses obtained at the optimal temperature showed a bell-shaped dependency on the proportion of surface coverage by Pd and Pt NPs. The sensing mechanism is explained and the results were also fitted to a simple theoretical model based on modulation in the conduction channel via the chemical and electronic sensitization on NWs. This study provides guidelines on the amount of metal NPs for achieving the optimal sensing responses in metal oxide NWs gas sensors.

Original languageEnglish
Article number127196
JournalSensors and Actuators, B: Chemical
Volume302
DOIs
StatePublished - 2020 Jan 1

Fingerprint

Metal nanoparticles
Chemical sensors
Oxides
Nanowires
nanowires
Gases
Metals
Nanoparticles
nanoparticles
optimization
sensors
Precious metals
gases
metals
Modulation
metal oxides
noble metals
bells
Temperature
proportion

Keywords

  • Functionalization
  • NO gas
  • Pd
  • Pt
  • Sensing mechanism
  • SnO NWs

Cite this

@article{287201c11e61413a9faa76f3522292d0,
title = "Optimization of the surface coverage of metal nanoparticles on nanowires gas sensors to achieve the optimal sensing performance",
abstract = "The functionalization of noble metal nanoparticles (NPs) is a highly efficient method for increasing the sensing performance of metal oxide nanowire (NWs) gas sensors. Despite the well-established strategy, the level of the optimal functionalization for obtaining the maximum sensing response has rarely been reported. Herein, the surfaces of SnO2 NWs were functionalized with Pt and Pd NPs, and the gas sensing characteristics were then investigated using NO2 as an example gas. The sensing responses obtained at the optimal temperature showed a bell-shaped dependency on the proportion of surface coverage by Pd and Pt NPs. The sensing mechanism is explained and the results were also fitted to a simple theoretical model based on modulation in the conduction channel via the chemical and electronic sensitization on NWs. This study provides guidelines on the amount of metal NPs for achieving the optimal sensing responses in metal oxide NWs gas sensors.",
keywords = "Functionalization, NO gas, Pd, Pt, Sensing mechanism, SnO NWs",
author = "Lee, {Jae Hyoung} and Ali Mirzaei and Kim, {Jin Young} and Kim, {Jae Hun} and Kim, {Hyoun Woo} and Kim, {Sang Sub}",
year = "2020",
month = "1",
day = "1",
doi = "10.1016/j.snb.2019.127196",
language = "English",
volume = "302",
journal = "Sensors and Actuators, B: Chemical",
issn = "0925-4005",

}

Optimization of the surface coverage of metal nanoparticles on nanowires gas sensors to achieve the optimal sensing performance. / Lee, Jae Hyoung; Mirzaei, Ali; Kim, Jin Young; Kim, Jae Hun; Kim, Hyoun Woo; Kim, Sang Sub.

In: Sensors and Actuators, B: Chemical, Vol. 302, 127196, 01.01.2020.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Optimization of the surface coverage of metal nanoparticles on nanowires gas sensors to achieve the optimal sensing performance

AU - Lee, Jae Hyoung

AU - Mirzaei, Ali

AU - Kim, Jin Young

AU - Kim, Jae Hun

AU - Kim, Hyoun Woo

AU - Kim, Sang Sub

PY - 2020/1/1

Y1 - 2020/1/1

N2 - The functionalization of noble metal nanoparticles (NPs) is a highly efficient method for increasing the sensing performance of metal oxide nanowire (NWs) gas sensors. Despite the well-established strategy, the level of the optimal functionalization for obtaining the maximum sensing response has rarely been reported. Herein, the surfaces of SnO2 NWs were functionalized with Pt and Pd NPs, and the gas sensing characteristics were then investigated using NO2 as an example gas. The sensing responses obtained at the optimal temperature showed a bell-shaped dependency on the proportion of surface coverage by Pd and Pt NPs. The sensing mechanism is explained and the results were also fitted to a simple theoretical model based on modulation in the conduction channel via the chemical and electronic sensitization on NWs. This study provides guidelines on the amount of metal NPs for achieving the optimal sensing responses in metal oxide NWs gas sensors.

AB - The functionalization of noble metal nanoparticles (NPs) is a highly efficient method for increasing the sensing performance of metal oxide nanowire (NWs) gas sensors. Despite the well-established strategy, the level of the optimal functionalization for obtaining the maximum sensing response has rarely been reported. Herein, the surfaces of SnO2 NWs were functionalized with Pt and Pd NPs, and the gas sensing characteristics were then investigated using NO2 as an example gas. The sensing responses obtained at the optimal temperature showed a bell-shaped dependency on the proportion of surface coverage by Pd and Pt NPs. The sensing mechanism is explained and the results were also fitted to a simple theoretical model based on modulation in the conduction channel via the chemical and electronic sensitization on NWs. This study provides guidelines on the amount of metal NPs for achieving the optimal sensing responses in metal oxide NWs gas sensors.

KW - Functionalization

KW - NO gas

KW - Pd

KW - Pt

KW - Sensing mechanism

KW - SnO NWs

UR - http://www.scopus.com/inward/record.url?scp=85072862521&partnerID=8YFLogxK

U2 - 10.1016/j.snb.2019.127196

DO - 10.1016/j.snb.2019.127196

M3 - Article

AN - SCOPUS:85072862521

VL - 302

JO - Sensors and Actuators, B: Chemical

JF - Sensors and Actuators, B: Chemical

SN - 0925-4005

M1 - 127196

ER -