The room-temperature sensing performance of ZnO nanorods for 2-methoxyethanol solvent

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Abstract

Quasi-vertically aligned zinc oxide nanorod (ZnO NR) arrays were synthesized via hydrothermal processing on glass substrates coated with a conductive layer of aluminium-doped zinc oxide (AZO). Different characterization techniques were used to study the phase structures, surface morphology and elemental composition of the prepared nanorods, including X-ray diffraction (XRD), field emission scanning microscopy (FE-SEM) and X-ray photoelectron spectroscopy (XPS). The sensing behaviour of the ZnO NR arrays has been demonstrated toward different concentrations of 2-methoxyethanol solvent, a highly toxic organic compound. The sensitivity of the prepared sensor is 24 nA/(ppm cm-2) and 60 nA/(ppm cm-2) at applied voltages of 5 V and 10 V, respectively. Its limit of detection (LoD) is 190 ± 5 ppm independently of the applied voltage. The mechanism of the sensing behaviour was explained based on the charge-transfer mechanisms.

Original languageEnglish
Pages (from-to)223-228
Number of pages6
JournalSensors and Actuators, B: Chemical
Volume203
DOIs
Publication statusPublished - 2014

Fingerprint

Zinc Oxide
Zinc oxide
Nanorods
zinc oxides
nanorods
room temperature
Poisons
Electric potential
electric potential
Phase structure
Aluminum
organic compounds
Organic compounds
Field emission
Temperature
Surface morphology
Charge transfer
field emission
Microscopic examination
x rays

Keywords

  • Electrochemical sensors
  • Hydrothermal process
  • Organic solvent detection
  • ZnO nanorods

ASJC Scopus subject areas

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

Cite this

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title = "The room-temperature sensing performance of ZnO nanorods for 2-methoxyethanol solvent",
abstract = "Quasi-vertically aligned zinc oxide nanorod (ZnO NR) arrays were synthesized via hydrothermal processing on glass substrates coated with a conductive layer of aluminium-doped zinc oxide (AZO). Different characterization techniques were used to study the phase structures, surface morphology and elemental composition of the prepared nanorods, including X-ray diffraction (XRD), field emission scanning microscopy (FE-SEM) and X-ray photoelectron spectroscopy (XPS). The sensing behaviour of the ZnO NR arrays has been demonstrated toward different concentrations of 2-methoxyethanol solvent, a highly toxic organic compound. The sensitivity of the prepared sensor is 24 nA/(ppm cm-2) and 60 nA/(ppm cm-2) at applied voltages of 5 V and 10 V, respectively. Its limit of detection (LoD) is 190 ± 5 ppm independently of the applied voltage. The mechanism of the sensing behaviour was explained based on the charge-transfer mechanisms.",
keywords = "Electrochemical sensors, Hydrothermal process, Organic solvent detection, ZnO nanorods",
author = "Al-Hardan, {N. H.} and {Jalar @ Jalil}, Azman and {Abdul Hamid}, {Muhammad Azmi} and Keng, {Lim Kar} and Roslinda Shamsudin and {Yeop Majlis}, Burhanuddin",
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T1 - The room-temperature sensing performance of ZnO nanorods for 2-methoxyethanol solvent

AU - Al-Hardan, N. H.

AU - Jalar @ Jalil, Azman

AU - Abdul Hamid, Muhammad Azmi

AU - Keng, Lim Kar

AU - Shamsudin, Roslinda

AU - Yeop Majlis, Burhanuddin

PY - 2014

Y1 - 2014

N2 - Quasi-vertically aligned zinc oxide nanorod (ZnO NR) arrays were synthesized via hydrothermal processing on glass substrates coated with a conductive layer of aluminium-doped zinc oxide (AZO). Different characterization techniques were used to study the phase structures, surface morphology and elemental composition of the prepared nanorods, including X-ray diffraction (XRD), field emission scanning microscopy (FE-SEM) and X-ray photoelectron spectroscopy (XPS). The sensing behaviour of the ZnO NR arrays has been demonstrated toward different concentrations of 2-methoxyethanol solvent, a highly toxic organic compound. The sensitivity of the prepared sensor is 24 nA/(ppm cm-2) and 60 nA/(ppm cm-2) at applied voltages of 5 V and 10 V, respectively. Its limit of detection (LoD) is 190 ± 5 ppm independently of the applied voltage. The mechanism of the sensing behaviour was explained based on the charge-transfer mechanisms.

AB - Quasi-vertically aligned zinc oxide nanorod (ZnO NR) arrays were synthesized via hydrothermal processing on glass substrates coated with a conductive layer of aluminium-doped zinc oxide (AZO). Different characterization techniques were used to study the phase structures, surface morphology and elemental composition of the prepared nanorods, including X-ray diffraction (XRD), field emission scanning microscopy (FE-SEM) and X-ray photoelectron spectroscopy (XPS). The sensing behaviour of the ZnO NR arrays has been demonstrated toward different concentrations of 2-methoxyethanol solvent, a highly toxic organic compound. The sensitivity of the prepared sensor is 24 nA/(ppm cm-2) and 60 nA/(ppm cm-2) at applied voltages of 5 V and 10 V, respectively. Its limit of detection (LoD) is 190 ± 5 ppm independently of the applied voltage. The mechanism of the sensing behaviour was explained based on the charge-transfer mechanisms.

KW - Electrochemical sensors

KW - Hydrothermal process

KW - Organic solvent detection

KW - ZnO nanorods

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