Involvement of Contact and Surface Phenomena in Nanolayered Amorphous Te Films for Toxic Gas Detection at Room Temperature

2022 ◽  
pp. 560-567
Author(s):  
Dumitru Tsiulyanu ◽  
O. Mocreac ◽  
T. Braniste
Keyword(s):  
Room Temperature ◽  
Gas Detection ◽  
Surface Phenomena ◽  
Toxic Gas

Electronic nose for toxic gas detection based on photostimulated core–shell nanowires

RSC Advances ◽  
2014 ◽  
Vol 4 (66) ◽  
pp. 35084-35088 ◽  
Author(s):  
Chatchawal Wongchoosuk ◽  
Kittitat Subannajui ◽  
Chunyu Wang ◽  
Yang Yang ◽  
Firat Güder ◽  
...  
Keyword(s):  
Electronic Nose ◽  
Room Temperature ◽  
Gas Detection ◽  
Core Shell ◽  
Toxic Gases ◽  
Toxic Gas ◽  
Shell Nanowires

This device can detect and discriminate toxic and non-toxic gases in the ppb level at room temperature.

Photoacoustic spectroscopy for trace gas detection with cryogenic and room-temperature continuous-wave quantum cascade lasers

Open Physics ◽  
2010 ◽  
Vol 8 (2) ◽  
Author(s):  
Virginie Zeninari ◽  
Agnès Grossel ◽  
Lilian Joly ◽  
Thomas Decarpenterie ◽  
Bruno Grouiez ◽  
...  
Keyword(s):  
Detection Limit ◽  
Room Temperature ◽  
Quantum Cascade Lasers ◽  
Gas Detection ◽  
Trace Gas ◽  
Atmospheric Gases ◽  
Trace Gas Detection ◽  
Quantum Cascade ◽  
Cascade Lasers

AbstractThe main characteristics that a sensor must possess for trace gas detection and pollution monitoring are high sensitivity, high selectivity and the capability to perform in situ measurements. The photacoustic Helmholtz sensor developed in Reims, used in conjunction with powerful Quantum Cascade Lasers (QCLs), fulfils all these requirements. The best cell response is # 1200 V W−1 cm and the corresponding ultimate sensitivity is j 3.3 × 10−10 W cm−11 Hz−11/2. This efficient sensor is used with mid-infrared QCLs from Alpes Lasers to reach the strong fundamental absorption bands of some atmospheric gases. A first cryogenic QCL emitting at 7.9 μm demonstrates the detection of methane in air with a detection limit of 3 ppb. A detection limit of 20 ppb of NO in air is demonstrated using another cryogenic QCL emitting in the 5.4 μm region. Real in-situ measurements can be achieved only with room-temperature QCLs. A room-temperature QCL emitting in the 7.9 μm region demonstrates the simultaneous detection of methane and nitrous oxide in air (17 and 7 ppb detection limit, respectively). All these reliable measurements allow the estimated detection limit for various atmospheric gases using quantum cascade lasers to be obtained. Each gas absorbing in the infrared may be detected at a detection limit in the ppb or low-ppb range.

Electrolyte-gated transistor for CO2 gas detection at room temperature

2020 ◽  
Vol 317 ◽  
pp. 128201 ◽  
Author(s):  
Bora Ersöz ◽  
Katrin Schmitt ◽  
Jürgen Wöllenstein
Keyword(s):  
Room Temperature ◽  
Gas Detection ◽  
Co2 Gas

Organosilicon dimer of BTBT as a perspective semiconductor material for toxic gas detection with monolayer organic field-effect transistors

2018 ◽  
Vol 6 (36) ◽  
pp. 9649-9659 ◽  
Author(s):  
Askold A. Trul ◽  
Alexey S. Sizov ◽  
Victoria P. Chekusova ◽  
Oleg V. Borshchev ◽  
Elena V. Agina ◽  
...  
Keyword(s):  
Field Effect ◽  
Field Effect Transistors ◽  
Fast Response ◽  
Semiconductor Material ◽  
Gas Detection ◽  
Electrical Performance ◽  
Organic Field Effect Transistors ◽  
Toxic Gas

Monolayer organic field effect transistors (OFETs) based on novel BTBT dimer demonstrate excellent electrical performance and fast response to ammonia vapours.

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.

scholarly journals Surface Plasmon Resonance (SPR) to Magneto-Optic SPR

2019 ◽  
Vol 4 (2) ◽  
pp. 50 ◽  
Author(s):  
Conrad Rizal ◽  
Vladimir Belotelov ◽  
Daria Ignatyeva ◽  
Anatoly K. Zvezdin ◽  
Simone Pisana
Keyword(s):  
Surface Plasmon Resonance ◽  
Environmental Monitoring ◽  
Surface Plasmon ◽  
Undergraduate Students ◽  
Plasmon Resonance ◽  
Gas Detection ◽  
Future Prospects ◽  
Toxic Gas ◽  
Magneto Optic

In this editorial, a brief background of the surface plasmon resonance (SPR) principle is discussed, followed by several aspects of magneto-optic SPR (MOSPR) and sensing schemes from the viewpoint of fundamental studies and potential technological applications. New sensitivity metrics are introduced that would allow researchers to compare the performance of SPR and MOSPR-based sensors. Merits of MOSPR over SPR based sensors and challenges faced by MOSPR sensors in terms of their practical use and portability are also considered. The editorial ends with potential new configurations and future prospects. This work is considered highly significant to device engineers, graduate and undergraduate students, and researchers of all levels involved in developing new classes of bio-devices for sensing, imaging, environmental monitoring, toxic gas detection, and surveying applications to name a few.

Sign in / Sign up

Export Citation Format

Share Document