Gas sensing characteristics of copper phthalocyanine films: effects of film thickness and sensing temperature

2004 ◽  
Vol 99 (2-3) ◽  
pp. 281-287 ◽  
Author(s):  
Yuh-Lang Lee ◽  
Chuan-Yi Sheu ◽  
Rung-Hwa Hsiao
Keyword(s):  
Film Thickness ◽  
Copper Phthalocyanine ◽  
Gas Sensing ◽  
Sensing Characteristics

Effect of palladium doping and film thickness on the H2-gas sensing characteristics of SnO2

1994 ◽  
Vol 21 (2) ◽  
pp. 91-96 ◽  
Author(s):  
Kyung Hyun Cha ◽  
Hee Chan Park ◽  
Kwang Ho Kim
Keyword(s):  
Film Thickness ◽  
Gas Sensing ◽  
Palladium Doping ◽  
Sensing Characteristics

scholarly journals Improved Cl2 sensing characteristics of reduced graphene oxide when decorated with copper phthalocyanine nanoflowers

RSC Advances ◽  
2017 ◽  
Vol 7 (41) ◽  
pp. 25229-25236 ◽  
Author(s):  
Sanjeev Kumar ◽  
Navdeep Kaur ◽  
Anshul Kumar Sharma ◽  
Aman Mahajan ◽  
R. K. Bedi
Keyword(s):  
Graphene Oxide ◽  
Detection Limit ◽  
Reduced Graphene Oxide ◽  
Room Temperature ◽  
Copper Phthalocyanine ◽  
Gas Sensing ◽  
Sensing Platform ◽  
Reduced Graphene ◽  
Sensing Characteristics

A novel gas sensing platform involving a hybrid of reduced graphene oxide (rGO) sheets with unsubstituted copper phthalocyanine (CuPc) nanoflowers has been explored as a room temperature ppb level chemiresistive chlorine (Cl2) sensor with a detection limit as low as 1.97 ppb.

Spin coated unsubstituted copper phthalocyanine thin films for nitrogen dioxide sensors

2015 ◽  
Vol 29 (06n07) ◽  
pp. 1540032 ◽  
Author(s):  
Sanjay Chakane ◽  
Ashok Datir ◽  
Pankaj Koinkar
Keyword(s):  
Thin Films ◽  
Nitrogen Dioxide ◽  
Room Temperature ◽  
Copper Phthalocyanine ◽  
Gas Sensing ◽  
Mixed Solution ◽  
Visible Absorption ◽  
Α Phase ◽  
Uv Visible ◽  
Sensing Characteristics

Copper phthalocyanine ( CuPc ) is synthesized chemically and used for making CuPc thin films using spin coating technique. Films were prepared from trifluroacetic acid (TFA) and chlorobenzene mixed solution on the glass substrate. Spin coated films of unsubstituted CuPc films were heat annealed at 150°C for 2 h duration and were used to study NO 2 gas sensing characteristics. α-phase of CuPc is noted by UV-visible absorption spectra. IR spectra of undoped CuPc films and doped CuPc films with NO 2 revealed that, doping of nitrogen dioxide modifies and deletes some of the bands. The effect of NO 2 at various concentrations from 50 ppm to 500 ppm in atmospheric air at room temperature on the electrical conductivity of CuPc films was studied. Sensitivity, response time and repeatability of the CuPc sensor were discussed in this paper.

Structural Approach to Improve the Response Characteristics of Copper Phthalocyanine Thin Film-Based NO2Gas Sensor

1997 ◽  
Vol 488 ◽  
Author(s):  
Tadashi Nagasawa ◽  
Kenji Murakami ◽  
Kenzo Watanabe
Keyword(s):  
Copper Phthalocyanine ◽  
Gas Sensing ◽  
High Sensitivity ◽  
Film Deposition ◽  
Gas Sensitivity ◽  
Vacuum Sublimation ◽  
Response Characteristics ◽  
Atomic Force ◽  
Film Microstructure ◽  
Sensing Characteristics

AbstractIn order to realize a high-sensitivity, low temperature operable NO2gas sensor, thin films of at-form copper phthalocyanine (α-CuPc) have been deposited by vacuum sublimation. In this study, we have attempted to improve the gas-sensing characteristics through a modification of the film microstructure. Firstly, the gas sensitivity is remarkably increased by an insertion of higher-sensitive layer (vanadyl Pc film) between the α-CuPc film and the glass substrate in the low gas concentration range. Secondly, a reversibility in cycles of gas doping and dedoping is improved by film deposition on hydrofluoric acid-treated substrate. It is found from atomic force microscope analyses that this phenomenon may be closely related to a modification of the film microstructure.

scholarly journals Transforming Pt-SnO2 Nanoparticles into Pt-SnO2 Composite Nanoceramics for Room-Temperature Hydrogen-Sensing Applications

Materials ◽  
2021 ◽  
Vol 14 (9) ◽  
pp. 2123
Author(s):  
Ming Liu ◽  
Caochuang Wang ◽  
Pengcheng Li ◽  
Liang Cheng ◽  
Yongming Hu ◽  
...  
Keyword(s):  
Room Temperature ◽  
Gas Sensing ◽  
Sintering Temperature ◽  
Sno2 Nanoparticles ◽  
Hydrogen Sensing ◽  
Sensing Applications ◽  
Nanostructured Metal Oxides ◽  
Low Dimensional ◽  
Sensing Characteristics ◽  
Nanostructured Metal

Many low-dimensional nanostructured metal oxides (MOXs) with impressive room-temperature gas-sensing characteristics have been synthesized, yet transforming them into relatively robust bulk materials has been quite neglected. Pt-decorated SnO2 nanoparticles with 0.25–2.5 wt% Pt were prepared, and highly attractive room-temperature hydrogen-sensing characteristics were observed for them all through pressing them into pellets. Some pressed pellets were further sintered over a wide temperature range of 600–1200 °C. Though the room-temperature hydrogen-sensing characteristics were greatly degraded in many samples after sintering, those samples with 0.25 wt% Pt and sintered at 800 °C exhibited impressive room-temperature hydrogen-sensing characteristics comparable to those of their counterparts of as-pressed pellets. The variation of room-temperature hydrogen-sensing characteristics among the samples was explained by the facts that the connectivity between SnO2 grains increases with increasing sintering temperature, and Pt promotes oxidation of SnO2 at high temperatures. These results clearly demonstrate that some low-dimensional MOX nanocrystals can be successfully transformed into bulk MOXs with improved robustness and comparable room-temperature gas-sensing characteristics.

Effect of post-oxidation processes and thickness of SnO2 films prepared by vacuum evaporation on CO gas sensing characteristics

2021 ◽  
Author(s):  
Amit Kumar Mauraya ◽  
Preetam Singh ◽  
Saravanan Muthiah ◽  
Sunil Singh Kushvaha ◽  
Senthil Kumar Muthusamy
Keyword(s):  
Gas Sensing ◽  
Vacuum Evaporation ◽  
Oxidation Processes ◽  
Sensing Characteristics ◽  
Co Gas

Exploring gas-sensing characteristics of (CH2OH)2 with controlling the morphology of BiVO4 by adjusting pH of solution

2021 ◽  
Vol 859 ◽  
pp. 158400
Author(s):  
Shitu Pei ◽  
Shuyi Ma ◽  
Xiaoli Xu ◽  
Omer Almamoun ◽  
Yaotong Ma ◽  
...  
Keyword(s):  
Gas Sensing ◽  
Sensing Characteristics

Electrical conduction and gas sensing characteristics of P3HT/Au nano-islands composite

2017 ◽  
Vol 241 ◽  
pp. 1099-1105 ◽  
Author(s):  
Bin Chen ◽  
Chuanjun Liu ◽  
Lingpu Ge ◽  
Kenshi Hayashi
Keyword(s):  
Electrical Conduction ◽  
Gas Sensing ◽  
Sensing Characteristics
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