Synthesis of In2O3-ZnO core-shell nanowires and their application in gas sensing

Nandan Singh; Andrea Ponzoni; Raju Kumar Gupta; Pooi See Lee; Elisabetta Comini

doi:10.1016/j.snb.2011.09.073

Synthesis of In₂O₃-ZnO core-shell nanowires and their application in gas sensing

Nandan Singh^*, Andrea Ponzoni, Raju Kumar Gupta, Pooi See Lee, Elisabetta Comini

^*Corresponding author for this work

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

141 Citations (Scopus)

Abstract

Heteronanostructures are very promising gas sensor materials due to their high surface area and hybrid properties. In₂O₃-ZnO core-shell nanowires are synthesized via two-step growth process. The as-deposited shell is made up of grainy polycrystalline ZnO coated on the single crystalline In₂O₃ core. The sensing properties of pristine In₂O₃ and In₂O₃-ZnO core-shell nanowires are investigated for different gases. In₂O ₃-ZnO core-shell nanowires are found to possess better response towards the CO, H₂ and ethanol while pristine In₂O ₃ nanowires has shown a superior response towards the NO₂. The high sensitivity and dynamic repeatability have shown in these sensors reveal that the core-shell nanowires are promising as sensitive and reliable chemical sensors. The gas sensing mechanism of these heterostructured nanowires is discussed in detail.

Original language	English
Pages (from-to)	1346-1351
Number of pages	6
Journal	Sensors and Actuators, B: Chemical
Volume	160
Issue number	1
DOIs	https://doi.org/10.1016/j.snb.2011.09.073
Publication status	Published - Dec 15 2011
Externally published	Yes

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

Keywords

Core-shell nanowires
Gas sensor
Nanowire network
Polycrystalline
Sensitivity

Access to Document

10.1016/j.snb.2011.09.073

Cite this

@article{43d9148254b54e29a7503169c4e38835,

title = "Synthesis of In2O3-ZnO core-shell nanowires and their application in gas sensing",

abstract = "Heteronanostructures are very promising gas sensor materials due to their high surface area and hybrid properties. In2O3-ZnO core-shell nanowires are synthesized via two-step growth process. The as-deposited shell is made up of grainy polycrystalline ZnO coated on the single crystalline In2O3 core. The sensing properties of pristine In2O3 and In2O3-ZnO core-shell nanowires are investigated for different gases. In2O 3-ZnO core-shell nanowires are found to possess better response towards the CO, H2 and ethanol while pristine In2O 3 nanowires has shown a superior response towards the NO2. The high sensitivity and dynamic repeatability have shown in these sensors reveal that the core-shell nanowires are promising as sensitive and reliable chemical sensors. The gas sensing mechanism of these heterostructured nanowires is discussed in detail.",

keywords = "Core-shell nanowires, Gas sensor, Nanowire network, Polycrystalline, Sensitivity",

author = "Nandan Singh and Andrea Ponzoni and Gupta, \{Raju Kumar\} and Lee, \{Pooi See\} and Elisabetta Comini",

year = "2011",

month = dec,

day = "15",

doi = "10.1016/j.snb.2011.09.073",

language = "English",

volume = "160",

pages = "1346--1351",

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

issn = "0925-4005",

publisher = "Elsevier",

number = "1",

}

TY - JOUR

T1 - Synthesis of In2O3-ZnO core-shell nanowires and their application in gas sensing

AU - Singh, Nandan

AU - Ponzoni, Andrea

AU - Gupta, Raju Kumar

AU - Lee, Pooi See

AU - Comini, Elisabetta

PY - 2011/12/15

Y1 - 2011/12/15

N2 - Heteronanostructures are very promising gas sensor materials due to their high surface area and hybrid properties. In2O3-ZnO core-shell nanowires are synthesized via two-step growth process. The as-deposited shell is made up of grainy polycrystalline ZnO coated on the single crystalline In2O3 core. The sensing properties of pristine In2O3 and In2O3-ZnO core-shell nanowires are investigated for different gases. In2O 3-ZnO core-shell nanowires are found to possess better response towards the CO, H2 and ethanol while pristine In2O 3 nanowires has shown a superior response towards the NO2. The high sensitivity and dynamic repeatability have shown in these sensors reveal that the core-shell nanowires are promising as sensitive and reliable chemical sensors. The gas sensing mechanism of these heterostructured nanowires is discussed in detail.

AB - Heteronanostructures are very promising gas sensor materials due to their high surface area and hybrid properties. In2O3-ZnO core-shell nanowires are synthesized via two-step growth process. The as-deposited shell is made up of grainy polycrystalline ZnO coated on the single crystalline In2O3 core. The sensing properties of pristine In2O3 and In2O3-ZnO core-shell nanowires are investigated for different gases. In2O 3-ZnO core-shell nanowires are found to possess better response towards the CO, H2 and ethanol while pristine In2O 3 nanowires has shown a superior response towards the NO2. The high sensitivity and dynamic repeatability have shown in these sensors reveal that the core-shell nanowires are promising as sensitive and reliable chemical sensors. The gas sensing mechanism of these heterostructured nanowires is discussed in detail.

KW - Core-shell nanowires

KW - Gas sensor

KW - Nanowire network

KW - Polycrystalline

KW - Sensitivity

UR - http://www.scopus.com/inward/record.url?scp=81155137918&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=81155137918&partnerID=8YFLogxK

U2 - 10.1016/j.snb.2011.09.073

DO - 10.1016/j.snb.2011.09.073

M3 - Article

AN - SCOPUS:81155137918

SN - 0925-4005

VL - 160

SP - 1346

EP - 1351

JO - Sensors and Actuators, B: Chemical

JF - Sensors and Actuators, B: Chemical

IS - 1

ER -