Porous GaN Submicron Rods for Gas Sensor with High Sensitivity and Excellent Stability at High Temperature

Zhang, Mingxiang1; Zhao, Changhui1; Gong, Huimin1; Niu, Gaoqiang1; Wang, Fei1,2

2019-09-11

10.1021/acsami.9b09769

ACS Applied Materials & Interfaces   影响因子和分区

1944-8244

1944-8252

Highly porous GaN submicron rods have been synthesized successfully by a facile hydrothermal method and heat treatment under controlled atmosphere. The morphology and size of the hydrothermal products are tailorable by adjusting the concentration of precursor solutions. Upon calcination in air, the nanorod-assembled GaOOH submicron rods are converted into bundlelike Ga2O3 and into porous GaN submicron rods under an ammonia flow. Gas-sensing characterization demonstrates that the sensors based on porous GaN exhibit high sensitivity and fast response to ethanol vapor, as well as excellent stability and reliability at high temperature. The highly porous GaN submicron rods with a large specific surface area, small grain size, and high length-to-diameter ratio show better response to ethanol. A possible sensing enhancement mechanism is also proposed. This study provides a promising route for the novel synthesis of GaN submicron rods for high-performance gas sensors.

hydrothermal porous GaN submicron rods gas sensors high temperature high sensitivity

SCI ; EI

英语

第一 ; 通讯

Guangdong Special Support Program[2015TQ01X555]

Science & Technology - Other Topics ; Materials Science

Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary

WOS:000486360500056

AMER CHEMICAL SOC

20194107509353

Ammonia ; Chemical sensors ; Ethanol ; Gas detectors ; III-V semiconductors ; Morphology ; Nanorods

Nanotechnology:761 ; Chemistry:801 ; Organic Compounds:804.1 ; Inorganic Compounds:804.2 ; Accidents and Accident Prevention:914.1 ; Solid State Physics:933 ; Materials Science:951

Web of Science

1.Southern Univ Sci & Technol, Sch Microelect, Shenzhen 518055, Peoples R China
2.Southern Univ Sci & Technol, GaN Device Engn Technol Res Ctr Guangdong, Shenzhen 518055, Peoples R China

Zhang, Mingxiang,Zhao, Changhui,Gong, Huimin,et al. Porous GaN Submicron Rods for Gas Sensor with High Sensitivity and Excellent Stability at High Temperature[J]. ACS Applied Materials & Interfaces,2019,11(36):33124-33131.

Zhang, Mingxiang,Zhao, Changhui,Gong, Huimin,Niu, Gaoqiang,&Wang, Fei.(2019).Porous GaN Submicron Rods for Gas Sensor with High Sensitivity and Excellent Stability at High Temperature.ACS Applied Materials & Interfaces,11(36),33124-33131.

Zhang, Mingxiang,et al."Porous GaN Submicron Rods for Gas Sensor with High Sensitivity and Excellent Stability at High Temperature".ACS Applied Materials & Interfaces 11.36(2019):33124-33131.