Silver-Doped Zinc Oxide Single Nanowire Multifunctional Nanosensor With A Significant Enhancement In Response

Keywords

Nano-photodetector; Nanocrystalline materials; Nanosensor; Nanowire; ZnO:Ag

Abstract

Enhanced performances were obtained for nanosensors based on a single nanowire of silver-doped zinc oxide (ZnO:Ag). Arrays of crystalline ZnO:Ag nanowires were synthesized by electrodeposition on F-doped tin oxide coated substrates and studied by SEM, EDX, TEM, HRTEM, SIMS, XPS, PL and micro-Raman spectroscopy. Integration of a single nanowire or a single microwire on the chip was performed by employing metal maskless nanodeposition in the dual beam focused electron/ion beam instrument. The ultraviolet (UV) response and hydrogen (H2) gas response were studied for nanodevices and microdevices based on a single ZnO:Ag nanowire. We found that ZnO:Ag nanowire based nanosensor possesses a much faster response/recovery time and a higher response to UV radiation and hydrogen gas (∼50%) than those reported in literature. An increase in current value of about two orders in magnitude IUVON/IUVOFF was observed under exposure to UV light. Faster response/recovery times of about 0.98 s/0.87 s were observed. The ZnO:Ag nanowires and microwires can serve as nano-building materials for ultrasensitive and ultra-fast sensors with reduced power consumption. The mechanisms for such improved responses to UV and H2 were discussed. The developed nanomaterial is of great scientific interest for further studies as promising candidates for fabricating multifunctional nano-sensors, LEDs and photodetectors by bottom-up and hybrid nanotechnologies.

Publication Date

2-1-2016

Publication Title

Sensors and Actuators, B: Chemical

Volume

223

Number of Pages

893-903

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1016/j.snb.2015.10.002

Socpus ID

84945156316 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/84945156316

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