Publication result detail

Aerosol-assisted CVD-grown WO3 nanoneedles decorated with copper oxide nanoparticles for the selective and humidity-resilient detection of H2S

Annanouchm F. E.; Zouhair, H.; VALLEJOS VARGAS, S; Umek, P.; Guttmann, P.; Bittencourt, C.; Llobet, E.

Original Title

Aerosol-assisted CVD-grown WO3 nanoneedles decorated with copper oxide nanoparticles for the selective and humidity-resilient detection of H2S

English Title

Aerosol-assisted CVD-grown WO3 nanoneedles decorated with copper oxide nanoparticles for the selective and humidity-resilient detection of H2S

Type

WoS Article

Original Abstract

A gas-sensitive hybrid material consisting of Cu2O nanoparticle-decorated WO3 nanoneedles is successfully grown for the first time in a single step via aerosol-assisted chemical vapor deposition. Morphological, structural, and composition analyses show that our method is effective for growing single-crystalline, n-type WO3 nanoneedles decorated with p-type Cu2O nanoparticles at moderate temperatures (i.e., 380 °C), with cost effectiveness and short fabrication times, directly onto microhot plate transducer arrays with the view of obtaining gas sensors. The gas-sensing studies performed show that this hybrid nanomaterial has excellent sensitivity and selectivity to hydrogen sulfide (7-fold increase in response compared with that of pristine WO3 nanoneedles) and a low detection limit (below 300 ppb of H2S), together with unprecedented fast response times (2 s) and high immunity to changes in the background humidity. These superior properties arise because of the multiple p-n heterojunctions created at the nanoscale in our hybrid nanomaterial.

English abstract

A gas-sensitive hybrid material consisting of Cu2O nanoparticle-decorated WO3 nanoneedles is successfully grown for the first time in a single step via aerosol-assisted chemical vapor deposition. Morphological, structural, and composition analyses show that our method is effective for growing single-crystalline, n-type WO3 nanoneedles decorated with p-type Cu2O nanoparticles at moderate temperatures (i.e., 380 °C), with cost effectiveness and short fabrication times, directly onto microhot plate transducer arrays with the view of obtaining gas sensors. The gas-sensing studies performed show that this hybrid nanomaterial has excellent sensitivity and selectivity to hydrogen sulfide (7-fold increase in response compared with that of pristine WO3 nanoneedles) and a low detection limit (below 300 ppb of H2S), together with unprecedented fast response times (2 s) and high immunity to changes in the background humidity. These superior properties arise because of the multiple p-n heterojunctions created at the nanoscale in our hybrid nanomaterial.

Keywords

aerosol-assisted CVD; functionalization; gas sensor; nanoneedles; nanoparticles

Key words in English

aerosol-assisted CVD; functionalization; gas sensor; nanoneedles; nanoparticles

Authors

Annanouchm F. E.; Zouhair, H.; VALLEJOS VARGAS, S; Umek, P.; Guttmann, P.; Bittencourt, C.; Llobet, E.

RIV year

2016

Released

01.04.2015

Publisher

American Chemical Society

ISBN

1944-8252

Periodical

ACS Applied Materials & Interfaces

Volume

7

Number

12

State

United States of America

Pages from

6842

Pages to

6851

Pages count

7

URL

http://pubs.acs.org/doi/abs/10.1021/acsami.5b00411

BibTex

@article{BUT117970,
  author="Annanouchm F. E. and Zouhair, H. and VALLEJOS VARGAS, S and Umek, P. and Guttmann, P. and Bittencourt, C. and Llobet, E.",
  title="Aerosol-assisted CVD-grown WO3 nanoneedles decorated with copper oxide nanoparticles for the selective and humidity-resilient detection of H2S",
  journal="ACS Applied Materials & Interfaces",
  year="2015",
  volume="7",
  number="12",
  pages="6842--6851",
  doi="10.1021/acsami.5b00411",
  issn="1944-8244",
  url="http://pubs.acs.org/doi/abs/10.1021/acsami.5b00411"
}