Ultimate Sensitivity of Physical Sensor for Ammonia Gas Detection Exploiting Full Differential 3-Omega Technique

2017 ◽  
Vol 80 (10) ◽  
pp. 1571-1578 ◽  
Author(s):  
Ardalan Lotfi ◽  
Alireza Mahdavifar ◽  
Daniel Struk ◽  
Joseph R Stetter ◽  
Milad Navaei ◽  
...  
Keyword(s):  
Gas Detection ◽  
Ammonia Gas ◽  
Ultimate Sensitivity ◽  
Physical Sensor ◽  
3 Omega

scholarly journals Chemically functionalised suspended-core fibre for ammonia gas detection

2021 ◽  
pp. 1-1
Author(s):  
Liangliang Liu ◽  
Zijuan Tang ◽  
Chenyang He ◽  
Serhiy Korposh ◽  
Shuqin Lou ◽  
...  
Keyword(s):  
Gas Detection ◽  
Ammonia Gas ◽  
Core Fibre

Zinc(II)porphyrin-poly(lactic acid) nanoporous fiber membrane for ammonia gas detection

2016 ◽  
Vol 23 (4) ◽  
pp. 911-917 ◽  
Author(s):  
Min Hu ◽  
Weimin Kang ◽  
Zongjie Li ◽  
Shi Jie ◽  
Yixia Zhao ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Gas Detection ◽  
Poly Lactic Acid ◽  
Fiber Membrane ◽  
Ammonia Gas

High Sensitivity Ammonia Gas Detection with Hollow-Core Photonic Bandgap Fibers Reference Gas Cavity

2016 ◽  
Vol 43 (3) ◽  
pp. 0305001
Author(s):  
冯巧玲 Feng Qiaoling ◽  
姜萌 Jiang Meng ◽  
王学锋 Wang Xuefeng ◽  
梁鹄 Liang Hu ◽  
王聪颖 Wang Congying ◽  
...  
Keyword(s):  
Photonic Bandgap ◽  
High Sensitivity ◽  
Gas Detection ◽  
Hollow Core ◽  
Ammonia Gas ◽  
Photonic Bandgap Fibers ◽  
Gas Cavity

Carbon nanofibers functionalized with amide group for ammonia gas detection

2019 ◽  
Author(s):  
Nurjahirah Janudin ◽  
Norli Abdullah ◽  
Wan Md Zin Wan Yunus ◽  
Faizah Md Yasin ◽  
Mohd Hanif Yaacob ◽  
...  
Keyword(s):  
Carbon Nanofibers ◽  
Amide Group ◽  
Gas Detection ◽  
Ammonia Gas

scholarly journals Nanostructured ZnO/Ag Film Prepared by Magnetron Sputtering Method for Fast Response of Ammonia Gas Detection

Molecules ◽  
2020 ◽  
Vol 25 (8) ◽  
pp. 1899 ◽  
Author(s):  
Yiran Zheng ◽  
Min Li ◽  
Xiaoyan Wen ◽  
Ho-Pui Ho ◽  
Haifei Lu
Keyword(s):  
Magnetron Sputtering ◽  
Thermal Annealing ◽  
Physical Vapor Deposition ◽  
Gas Sensing ◽  
Volume Ratio ◽  
Fast Response ◽  
Gas Detection ◽  
Zno Films ◽  
Zno Film ◽  
Ammonia Gas

Possessing a large surface-to-volume ratio is significant to the sensitive gas detection of semiconductor nanostructures. Here, we propose a fast-response ammonia gas sensor based on porous nanostructured zinc oxide (ZnO) film, which is fabricated through physical vapor deposition and subsequent thermal annealing. In general, an extremely thin silver (Ag) layer (1, 3, 5 nm) and a 100 nm ZnO film are sequentially deposited on the SiO2/Si substrate by a magnetron sputtering method. The porous nanostructure of ZnO film is formed after thermal annealing contributed by the diffusion of Ag among ZnO crystal grains and the expansion of the ZnO film. Different thicknesses of the Ag layer help the formation of different sizes and quantities of hollows uniformly distributed in the ZnO film, which is demonstrated to hold superior gas sensing abilities than the compact ZnO film. The responses of the different porous ZnO films were also investigated in the ammonia concentration range of 10 to 300 ppm. Experimental results demonstrate that the ZnO/Ag(3 nm) sensor possesses a good electrical resistance variation of 85.74% after exposing the sample to 300 ppm ammonia gas for 310 s. Interestingly, a fast response of 61.18% in 60 s for 300 ppm ammonia gas has been achieved from the ZnO/Ag(5 nm) sensor, which costs only 6 s for the response increase to 10%. Therefore, this controllable, porous, nanostructured ZnO film maintaining a sensitive gas response, fabricated by the physical deposition approach, will be of great interest to the gas-sensing community.

scholarly journals Ammonia Gas Detection by Tannic Acid Functionalized and Reduced Graphene Oxide at Room Temperature

2014 ◽  
Vol 2014 ◽  
pp. 1-6 ◽  
Author(s):  
Sweejiang Yoo ◽  
Xin Li ◽  
Yuan Wu ◽  
Weihua Liu ◽  
Xiaoli Wang ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Gas Sensor ◽  
Tannic Acid ◽  
Room Temperature ◽  
Gas Sensing ◽  
High Sensitivity ◽  
Gas Detection ◽  
Ammonia Gas ◽  
Reduced Graphene

Reduced graphene oxide (rGO) based chemiresistor gas sensor has received much attention in gas sensing for high sensitivity, room temperature operation, and reversible. Here, for the first time, we present a promising chemiresistor for ammonia gas detection based on tannic acid (TA) functionalized and reduced graphene oxide (rGOTA functionalized). Green reductant of TA plays a major role in both reducing process and enhancing the gas sensing properties ofrGOTA functionalized. Our results showrGOTA functionalizedonly selective to ammonia with excellent respond, recovery, respond time, and recovery times.rGOTA functionalizedelectrical resistance decreases upon exposure to NH3where we postulated that it is due to n-doping by TA and charge transfer betweenrGOTA functionalizedand NH3through hydrogen bonding. Furthermore,rGOTA functionalizedhinders the needs for stimulus for both recovery and respond. The combination of greener sensing material and simplicity in overall sensor design provides a new sight for green reductant approach of rGO based chemiresistor gas sensor.

Application of bismuth ferrite protonic conductor for ammonia gas detection

2013 ◽  
Vol 188 ◽  
pp. 957-964 ◽  
Author(s):  
Małgorzata Dziubaniuk ◽  
Renata Bujakiewicz-Korońska ◽  
Jan Suchanicz ◽  
Jan Wyrwa ◽  
Mieczysław Rękas
Keyword(s):  
Bismuth Ferrite ◽  
Gas Detection ◽  
Ammonia Gas ◽  
Protonic Conductor

Flexible Transparent Reduced Graphene Oxide Sensor Coupled with Organic Dye Molecules for Rapid Dual-Mode Ammonia Gas Detection

2016 ◽  
Vol 26 (24) ◽  
pp. 4329-4338 ◽  
Author(s):  
Le Thai Duy ◽  
Tran Quang Trung ◽  
Vinh Quang Dang ◽  
Byeong-Ung Hwang ◽  
Saqib Siddiqui ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Organic Dye ◽  
Gas Detection ◽  
Dye Molecules ◽  
Dual Mode ◽  
Ammonia Gas ◽  
Reduced Graphene
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