UV-Assisted Alcohol Sensing With Zinc Oxide-Functionalized Gallium Nitride Nanowires

Author

Bajpai, Ritu ; Motayed, Abhishek ; Davydov, Albert V. ; Bertness, Kris A. ; Zaghloul, Mona E.

Author_Institution

Dept. of Electr. & Comput. Eng., George Washington Univ., Washington, DC, USA

Volume

33

Issue

7

fYear

2012

fDate

7/1/2012 12:00:00 AM

Firstpage

1075

Lastpage

1077

Abstract

Alcohol sensors using gallium nitride (GaN) nanowires (NWs) functionalized with zinc oxide (ZnO) nanoparticles have been demonstrated. These sensors operate at room temperature, are fully recoverable, and demonstrate a response and recovery time on the order of 100 s. The sensing is assisted by UV light within the 215-400-nm band and with the intensity of 375 nW/cm² measured at 365 nm. The ability to functionalize an inactive NW surface, with analyte-specific active metal-oxide nanoparticles, makes this sensor technique suitable for fabricating multianalyte sensor arrays.

Keywords

II-VI semiconductors; III-V semiconductors; chemical sensors; gallium compounds; nanofabrication; nanoparticles; nanosensors; nanowires; organic compounds; sensor arrays; ultraviolet detectors; wide band gap semiconductors; zinc compounds; GaN-ZnO; NW surface; UV-assisted alcohol sensing; analyte-specific active metal-oxide nanoparticle; multianalyte sensor array fabrication; nanowire surface; temperature 293 K to 298 K; time 100 s; wavelength 215 nm to 400 nm; Conductivity; Gallium nitride; Nanoparticles; Sensitivity; Temperature sensors; Zinc oxide; Chemical sensors; nanoparticles; nanoscale devices; photoconductivity; semiconductor nanostructures;

fLanguage

English

Journal_Title

Electron Device Letters, IEEE

Publisher

ieee

ISSN

0741-3106

Type

jour

DOI

10.1109/LED.2012.2194129

Filename

6200302