Preparation of TiO2 nanowire arrays through hydrothermal growth method and their pH sensing characteristics

Yen Chieh Huang; Fu Shou Tsai; Shui Jinn Wang

doi:10.7567/JJAP.53.06JG02

Preparation of TiO₂ nanowire arrays through hydrothermal growth method and their pH sensing characteristics

Yen Chieh Huang, Fu Shou Tsai, Shui Jinn Wang

Institute of Microelectronics

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

18 Citations (Scopus)

Abstract

The use of a TiO₂ nanowire (NW) hydrothermally grown on an fluorine-doped tin oxide (FTO) substrate as a separated sensing electrode of an extended-gate field-effect-transistor (SE-EGFET) pH sensor is demonstrated. Sensing responses to the prepared samples in a wide pH range (2-12) are presented and compared with responses of a film-type TiO₂ electrode. The pH sensors with the NW-type and film-type electrodes show a sensitivity of 62 and 50mV/pH, respectively, and a comparably good linearity in the pH range of 2-12. The superiority of the NW-type TiO2 electrode (24% improvement in sensitivity compared with that of the film-type electrode) is attributed mainly to the higher surface-to-volume (SV) ratio and higher conductivity of the hydrogen thermal growth (HTG) nanowires.

Original language	English
Article number	06JG02
Journal	Japanese journal of applied physics
Volume	53
Issue number	6 SPEC. ISSUE
DOIs	https://doi.org/10.7567/JJAP.53.06JG02
Publication status	Published - 2014 Jun

All Science Journal Classification (ASJC) codes

General Engineering
General Physics and Astronomy

Access to Document

10.7567/JJAP.53.06JG02

Cite this

@article{fafd52988a7c4a28b781cb87da4c5fd3,

title = "Preparation of TiO2 nanowire arrays through hydrothermal growth method and their pH sensing characteristics",

abstract = "The use of a TiO2 nanowire (NW) hydrothermally grown on an fluorine-doped tin oxide (FTO) substrate as a separated sensing electrode of an extended-gate field-effect-transistor (SE-EGFET) pH sensor is demonstrated. Sensing responses to the prepared samples in a wide pH range (2-12) are presented and compared with responses of a film-type TiO2 electrode. The pH sensors with the NW-type and film-type electrodes show a sensitivity of 62 and 50mV/pH, respectively, and a comparably good linearity in the pH range of 2-12. The superiority of the NW-type TiO2 electrode (24% improvement in sensitivity compared with that of the film-type electrode) is attributed mainly to the higher surface-to-volume (SV) ratio and higher conductivity of the hydrogen thermal growth (HTG) nanowires.",

author = "Huang, {Yen Chieh} and Tsai, {Fu Shou} and Wang, {Shui Jinn}",

year = "2014",

month = jun,

doi = "10.7567/JJAP.53.06JG02",

language = "English",

volume = "53",

journal = "Japanese journal of applied physics",

issn = "0021-4922",

number = "6 SPEC. ISSUE",

}

TY - JOUR

T1 - Preparation of TiO2 nanowire arrays through hydrothermal growth method and their pH sensing characteristics

AU - Huang, Yen Chieh

AU - Tsai, Fu Shou

AU - Wang, Shui Jinn

PY - 2014/6

Y1 - 2014/6

N2 - The use of a TiO2 nanowire (NW) hydrothermally grown on an fluorine-doped tin oxide (FTO) substrate as a separated sensing electrode of an extended-gate field-effect-transistor (SE-EGFET) pH sensor is demonstrated. Sensing responses to the prepared samples in a wide pH range (2-12) are presented and compared with responses of a film-type TiO2 electrode. The pH sensors with the NW-type and film-type electrodes show a sensitivity of 62 and 50mV/pH, respectively, and a comparably good linearity in the pH range of 2-12. The superiority of the NW-type TiO2 electrode (24% improvement in sensitivity compared with that of the film-type electrode) is attributed mainly to the higher surface-to-volume (SV) ratio and higher conductivity of the hydrogen thermal growth (HTG) nanowires.

AB - The use of a TiO2 nanowire (NW) hydrothermally grown on an fluorine-doped tin oxide (FTO) substrate as a separated sensing electrode of an extended-gate field-effect-transistor (SE-EGFET) pH sensor is demonstrated. Sensing responses to the prepared samples in a wide pH range (2-12) are presented and compared with responses of a film-type TiO2 electrode. The pH sensors with the NW-type and film-type electrodes show a sensitivity of 62 and 50mV/pH, respectively, and a comparably good linearity in the pH range of 2-12. The superiority of the NW-type TiO2 electrode (24% improvement in sensitivity compared with that of the film-type electrode) is attributed mainly to the higher surface-to-volume (SV) ratio and higher conductivity of the hydrogen thermal growth (HTG) nanowires.

UR - http://www.scopus.com/inward/record.url?scp=84903310800&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84903310800&partnerID=8YFLogxK

U2 - 10.7567/JJAP.53.06JG02

DO - 10.7567/JJAP.53.06JG02

M3 - Article

AN - SCOPUS:84903310800

SN - 0021-4922

VL - 53

JO - Japanese journal of applied physics

JF - Japanese journal of applied physics

IS - 6 SPEC. ISSUE

M1 - 06JG02

ER -

Preparation of TiO₂ nanowire arrays through hydrothermal growth method and their pH sensing characteristics

Abstract

All Science Journal Classification (ASJC) codes

Access to Document

Other files and links

Fingerprint

Cite this