Dispersed Ag nanoparticles on TiO2 nanowire clusters for photodetection

Author

Ngangbam, Chitralekha ; Shougaijam, Biraj ; Mondal, Aniruddha

Author_Institution

Dept. of Electron. & Commun. Eng., Inst. of Technol., Imphal, India

fYear

2014

fDate

22-25 Oct. 2014

Firstpage

1

Lastpage

4

Abstract

The glancing angle deposition (GLAD) technique has been employed to synthesize TiO₂ nanowire clusters (NWCs) covered with Ag nanoparticles (NPs) on Si (n-type) substrates. The Field emission scanning electron microscopy (FE-SEM) characterization has shown Ag NPs distribution on the TiO₂ NWCs surface. The photoluminescence emission intensity from the TiO₂ NWCs/Ag NPs sample reduced due to the formation of Ag-O complex on the TiO₂ surface. The Current (I) - voltage (V) characteristics have been measured for TiO₂ NWCs/Ag NPs structure under white light and dark conditions. The ideality factor ~ 16.1 for TiO₂ NWCs/Ag NPs and ~ 7.04 for TiO₂ NWCs based detectors have been calculated. The switching on/off time response shows rise time (Tr) of 23.60 sec and decay time (Tf) of 23.11 sec for TiO₂ NWCs/Ag NPs detector.

Keywords

field emission electron microscopy; nanofabrication; nanoparticles; nanosensors; nanowires; photodetectors; photoluminescence; scanning electron microscopy; silver; titanium compounds; Ag nanoparticle distribution; Ag-O complex formation; FE-SEM characterization; Si; Si substrates; TiO₂-Ag; current-voltage characteristics; dark condition; decay time; dispersed Ag nanoparticles; field emission scanning electron microscopy; glancing angle deposition technique; ideality factor; photodetection; photoluminescence emission intensity; rise time; switching on-off time response; time 23.11 s; time 23.6 s; titania nanowire cluster surface; white light condition; Artificial intelligence; Iron; Three-dimensional displays; GLAD; Silver Nanoparticles; TiO2 NWCs; photocurrent;

fLanguage

English

Publisher

ieee

Conference_Titel

TENCON 2014 - 2014 IEEE Region 10 Conference

Conference_Location

Bangkok

ISSN

2159-3442

Print_ISBN

978-1-4799-4076-9

Type

conf

DOI

10.1109/TENCON.2014.7022361

Filename

7022361