Influence of doping on sensitivity and response time of TiO2 oxygen gas sensor

2000 ◽  
Vol 71 (3) ◽  
pp. 1500-1504 ◽  
Author(s):  
Rajnish K. Sharma ◽  
M. C. Bhatnagar ◽  
G. L. Sharma
Keyword(s):  
Response Time ◽  
Gas Sensor ◽  
Oxygen Gas

scholarly journals Ammonia Gas Sensing Characteristic of P3HT-rGO-MWCNT Composite Films

2021 ◽  
Vol 11 (15) ◽  
pp. 6675
Author(s):  
Tran Si Trong Khanh ◽  
Tran Quang Trung ◽  
Le Thuy Thanh Giang ◽  
Tran Quang Nguyen ◽  
Nguyen Dinh Lam ◽  
...  
Keyword(s):  
Response Time ◽  
Gas Sensor ◽  
Gas Sensing ◽  
Composite Films ◽  
Weight Ratio ◽  
Film Surface ◽  
Relative Sensitivity ◽  
Ammonia Gas ◽  
Casting Technique ◽  
Multi Walled Carbon Nanotubes

In this work, the P3HT:rGO:MWCNTs (PGC) nanocomposite film applied to the ammonia gas sensor was successfully fabricated by a drop-casting technique. The results demonstrated that the optimum weight ratio of the PGC nanocomposite gas sensor is 20%:60%:20% as the weight ratio of P3HT:rGO:MWCNTs (called PGC-60). This weight ratio leads to the formation of nanostructured composites, causing the efficient adsorption/desorption of ammonia gas in/out of the film surface. The sensor based on PGC-60 possessed a response time of 30 s, sensitivity up to 3.6% at ammonia gas concentration of 10 ppm, and relative sensitivity of 0.031%/ppm. These results could be attributed to excellent electron transportation of rGO, the main adsorption activator to NH3 gas of P3HT, and holes move from P3HT to the cathodes, which works as charge “nano-bridges” carriers of Multi-Walled Carbon Nanotubes (MWCNTs). In general, these three components of PGC sensors have significantly contributed to the improvement of both the sensitivity and response time in the NH3 gas sensor.

Localized Collection of Airborne Analytes: A Transport Driven Approach to Improve the Response Time of Existing Gas Sensor Designs including SERS based Detection of Small Molecules

2015 ◽  
Vol 1746 ◽  
Author(s):  
Jun Fang ◽  
Se-Chul Park ◽  
Leslie Schlag ◽  
Thomas Stauden ◽  
Joerg Pezoldt ◽  
...  
Keyword(s):  
Response Time ◽  
Small Molecules ◽  
Gas Sensor ◽  
Recent Trend ◽  
Active Area ◽  
Analyte Concentration ◽  
Analyte Molecule ◽  
Collection Rate ◽  
Molecular Binding ◽  
Increased Sensitivity

ABSTRACTThe detection of single molecular binding events has been a recent trend in sensor research introducing various sensor designs where the active sensing elements are nanoscopic in size. Currently, diffusion-only-transport is often used and it becomes increasingly unlikely for an analyte molecule to “find” and interact with sensing structures where the active area is shrunk in size, trading an increased sensitivity with a long response time. This report introduces electrodynamic nanolens based analyte concentration concepts to transport airborne analytes to nanoscopic sensing points to improve the response time of existing gas sensor designs. In all cases we find that the collection rate is several orders of magnitudes higher than in the case where the collection is driven by diffusion.

scholarly journals A novel gas sensor based on porous α-Ni(OH)2 ultrathin nanosheet/reduced graphene oxide composites for room temperature detection of NOx

2016 ◽  
Vol 40 (5) ◽  
pp. 4678-4686 ◽  
Author(s):  
Ying Yang ◽  
Hongjie Wang ◽  
Linlin Wang ◽  
Yunlong Ge ◽  
Kan Kan ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Response Time ◽  
Reduced Graphene Oxide ◽  
Gas Sensor ◽  
Room Temperature ◽  
Temperature Detection ◽  
Reduced Graphene ◽  
Ultrathin Nanosheet ◽  
Oxide Composites

Porous α-Ni(OH)2 TNS/rGO composites have a sensitivity of 64.4% and a response time of 10.0 s to 97.0 ppm NOx.

Towards a room temperature, solid state, oxygen gas sensor

1995 ◽  
Vol 30 (11) ◽  
pp. 1351-1357 ◽  
Author(s):  
T. Eguchi ◽  
J. Kuwano
Keyword(s):  
Solid State ◽  
Gas Sensor ◽  
Room Temperature ◽  
Oxygen Gas

Mixed potential gas sensor with short response time

2008 ◽  
Vol 130 (1) ◽  
pp. 326-329 ◽  
Author(s):  
J ZOSEL ◽  
D TUCHTENHAGEN ◽  
K AHLBORN ◽  
U GUTH
Keyword(s):  
Response Time ◽  
Gas Sensor ◽  
Mixed Potential ◽  
Short Response Time
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