Facile preparation of monolayer NiO thin film for high performance THF sensor

ABSTRACT

High quality monolayer NiO thin film was fabricated by an oil–water interface self-assembly strategy. Polystyrene spheres were used as templates. The as-prepared film composed by a series of ordered hexagonal close-packed bowl-like array with an average diameter of about 700 nm. The monolayer NiO thin film deposited on aluminium oxide substrate with Au interdigital electrode on the surface can be directly used as a tetrahydrofuran (THF) gas sensor. The NiO thin film gas sensor presents great selectivity, fast response, and recovery time. The response of the monolayer NiO thin film sensor was about 15.14–100 ppm THF at a working temperature of 325 °C. The excellent performance can be attributed to the bowl-like structure and good contact with the Au coated aluminium oxide substrate.

Highlights

1. Monolayer NiO thin film was fabricated via an interfacial self-assemble strategy.

2. The sensor shows high selectivity, fast response and recovery time to THF at 325 °C.

3. A high sensitivity of 15.14 was achieved for the sensor to 100 ppm THF.

KEYWORDS:

• NiO
• sensors
• monolayer
• THF
• film

Disclosure statement

No potential conflict of interest was reported by the authors.

Additional information

Funding

This work is financially supported by the National Natural Science Foundation of China [grant number 51603092], [grant number 21506077]; Natural Science Foundation of Jiangsu Province [grant number BK20160537]; China Postdoctoral Science Foundation [grant number 2016M591777], [grant number 2016M590415]; Jiangsu University Scientific Research Funding [grant number 15JDG160]; Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions.