scholarly journals P1.8.10 Work Function Gas Sensors at Room Temperature by means of Conductive Polypyrrole Thin-films

2012 ◽  
Author(s):  
C. R. Zamarreño ◽  
I. R. Matias ◽  
F. J. Arregui ◽  
P. Davydovskaya ◽  
R. Pohle ◽  
...  
Keyword(s):  
Thin Films ◽  
Work Function ◽  
Gas Sensors ◽  
Room Temperature ◽  
Conductive Polypyrrole

scholarly journals A tunable volatile organic compound sensor by using PtOx/GQDs/TiO2 nanocomposite thin films at room temperature under visible-light activation

RSC Advances ◽  
2017 ◽  
Vol 7 (63) ◽  
pp. 39859-39868 ◽  
Author(s):  
Shaofeng Shao ◽  
Yunyun Chen ◽  
Shenbei Huang ◽  
Fan Jiang ◽  
Yunfei Wang ◽  
...  
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Visible Light ◽  
Gas Sensors ◽  
Room Temperature ◽  
Light Activation ◽  
Nanocomposite Thin Film ◽  
Nanocomposite Thin Films ◽  
Volatile Organic ◽  
Visible Light Activation

Pt/GQDs/TiO2 nanocomposite thin film-based gas sensors show tunable VOC sensing behaviour at room temperature under visible-light activation.

Room temperature pulsed laser deposited ZnO thin films as photoluminiscence gas sensors

2012 ◽  
Vol 259 ◽  
pp. 806-810 ◽  
Author(s):  
D. Padilla-Rueda ◽  
J.M. Vadillo ◽  
J.J. Laserna
Keyword(s):  
Thin Films ◽  
Gas Sensors ◽  
Room Temperature ◽  
Pulsed Laser ◽  
Zno Thin Films

scholarly journals Highly Sensitive InOxOzone Sensing Films on Flexible Substrates

2009 ◽  
Vol 2009 ◽  
pp. 1-5 ◽  
Author(s):  
G. Kiriakidis ◽  
K. Moschovis ◽  
I. Kortidis ◽  
R. Skarvelakis
Keyword(s):  
Thin Films ◽  
Gas Sensors ◽  
Air Conditioning ◽  
Room Temperature ◽  
Growth Conditions ◽  
Flexible Substrates ◽  
Dc Magnetron Sputtering ◽  
Surface Cracking ◽  
Highly Sensitive ◽  
Extended Surface

InOxthin films with a thickness of the order of 100 nm were grown by dc magnetron sputtering on glass, Si and flexible (PET) substrates. The electrical conductivity ofInOxthin films exhibited a change of two orders of magnitude during photoreduction with ultraviolet light and subsequent oxidation in ozone concentrations from 2370 to 15 ppb, at room temperature. Optical transparency of over 85% for all substrates was maintained. Film structural and ozone sensing properties were analyzed. Surface morphology investigations carried out by SEM for films on PET substrates showed extended surface cracking for bending angles beyond40∘. Optimization of growth conditions has led to films with extremely low detection levels for ozone down to 15 ppb at room temperature, demonstrating the wide prospective of utilizing these metal oxides as gas sensors on flexible substrates for a variety of automotive and air-conditioning applications.

TPD Study of Carbon Monoxide Interaction with Pd/Nb Bimetallic System

1994 ◽  
Vol 59 (8) ◽  
pp. 1709-1720 ◽  
Author(s):  
Tomas Jirsak ◽  
Vladimír Nikolajenko ◽  
Zlatko Knor
Keyword(s):  
Thin Films ◽  
Work Function ◽  
Room Temperature ◽  
Temperature Programmed Desorption ◽  
Foil Surface ◽  
Temperature State ◽  
Bimetallic System ◽  
Adsorption Of Co ◽  
Higher Temperature ◽  
Temperature Programmed

Chemisorption properties of thin films of Pd evaporated onto Nb recrystallized-foil surface have been studied by temperature-programmed desorption (TPD) and by measurement of the work function changes (WFC) at room temperature. TPD results indicate two states of CO adsorbed in dependence on the thickness of the palladium layer. The low temperature state (330 K) occurs at low Pd coverages (about one monolayer). Second state, occurring at slightly higher temperature (370 K), is attributed to bulk Pd. WFC data show negligible change of the work function after deposition of small amounts of Pd onto a clean Nb surface. With increasing amount of Pd, ∆ϕ rises and reaches a saturation value. Adsorption of CO onto Pd/Nb surface caused the work function increase at all coverages of Pd deposited.

Micro Sensor Operating at Room Temperature

2004 ◽  
Vol 828 ◽  
Author(s):  
Song-Kap Duk ◽  
Duk-Dong Lee
Keyword(s):  
Work Function ◽  
Gas Sensor ◽  
Gas Sensors ◽  
Gate Voltage ◽  
Room Temperature ◽  
Film Surface ◽  
High Sensitivity ◽  
Gas Detection ◽  
Pani Film ◽  
Response Characteristics

ABSTRACTIn the study, low power micro gas sensors operated at room temperature for the detection of NH3 and NOx gases are proposed. As candidate material of gas sensor for NH3 gas detection at room temperature, polyaniline(PANi) synthesized by chemical polymerization was selected. And Te(Tellurium) thin film was used for NOx gas detection at room temperature. By using these sensing materials, micro gas sensors for room temperature operation were prepared and measured the response characteristics for NH3 and NOx.In case of PANi sensor, the structure was inverted staggered FET type having advantage of useful one for Lab-On-a-Chip. The operating principle of the sensor is based on the change in work function of PANi film caused by adsorption of gas molecules in air on the film surface. The change in work function was measured indirectly from that in gate voltage of the FET device. The responses to various gases (NH3, CH4, Methanol and CH3CN) were obtained in gate voltage step mode in R.H. 30%. And in case of Te sensor, the sensing material was thermally evaporated on glass substrate. The thickness and annealing temperature were 500 Å −2000 Å and 100 °C −300 °C, respectively. The Te-based micro gas sensor exhibited high sensitivity to NOx and good selectivity against CO and hydro-carbon gases. And by adding Ti to Te film, the sensor has a good selectivity to CO gas.

scholarly journals Investigation of CO2 reaction with copper oxide nanoparticles for room temperature gas sensing

2016 ◽  
Vol 4 (14) ◽  
pp. 5294-5302 ◽  
Author(s):  
N. B. Tanvir ◽  
O. Yurchenko ◽  
Ch. Wilbertz ◽  
G. Urban
Keyword(s):  
Low Power ◽  
Copper Oxide ◽  
Work Function ◽  
Gas Sensors ◽  
Room Temperature ◽  
Gas Sensing ◽  
Low Cost ◽  
Copper Oxide Nanoparticles ◽  
Oxide Nanoparticles ◽  
Reversible Formation

CO2 sensing at room temperature: the interaction of CO2 and H2O with copper oxide nanoparticles results in reversible formation of basic carbonates. This phenomenon is the key reaction for the work function readout based CO2 sensing which enables the prospects towards low power and low cost gas sensors.

Sign in / Sign up

Export Citation Format

Share Document