Copper Phthalocyanine Quasi-1D Nanostructures: Growth Morphologies and Gas Sensing Properties

2008 ◽  
Vol 8 (1) ◽  
pp. 212-221 ◽  
Author(s):  
E. Strelcov ◽  
A. Kolmakov
Keyword(s):  
Response Time ◽  
Copper Phthalocyanine ◽  
Gas Sensing ◽  
Growth Conditions ◽  
Single Crystalline ◽  
1D Nanostructures ◽  
Gas Sensing Properties ◽  
Sensitivity And Selectivity ◽  
Bulk Ratio ◽  
Sensing Performance

The growth conditions of meso- and nanoscopic copper phthalocyanine quasi-1D structures, single crystalline whiskers and "nanowebs" were investigated on various technologically important substrates and were compared to existing literature. The synthesized morphologies were used to fabricate organic conductometric gas-sensing devices, and their sensitivity and selectivity toward NOx were investigated. The obtained results demonstrate excellent sensitivity and selectivity of these quasi-1D chemiresistors. Both the response time of the quasi-1D CuPc sensors and their overall gas sensing performance can be further enhanced by reducing the surface-to-bulk ratio of these nano- and meso-structures.

Effects of Heat Annealing on the Gas Sensing Properties of Spin Coated Unsubstituted Copper Phthalocyanine Films

2015 ◽  
Vol 1110 ◽  
pp. 241-245
Author(s):  
Ashok Datir ◽  
Pankaj Koinkar ◽  
Sanjay Chakane
Keyword(s):  
Response Time ◽  
Spin Coating ◽  
Recovery Rate ◽  
Response Rate ◽  
Copper Phthalocyanine ◽  
Gas Sensing ◽  
Sensing Properties ◽  
Lower Response ◽  
Time Sensitivity ◽  
Gas Sensing Properties

Unsubstituted copper phthalocyanine (CuPc) thin films on glass substrate were prepared using spin coating technique. The effects of heat annealing of CuPc films on the NO2 gas sensing properties were studied. The results showed that the films annealed at 150°C have highest sensitivity, highest response rate and lower response time. Sensitivity and response rate were decreased and response time was increased after annealing with temperature 200°C and above. The duration over which the films were annealed changes the gas sensing properties. Highest sensitivity, highest response rate, lower response time and highest recovery rate were observed for 2 hour (150°C) annealed films. Longer annealing time causes the decrease of sensitivity, response rate and recovery rate and increase of response time however improves recovery ratio. The heat treatment limited to the temperature of 150°C for 2 hours duration improves the sensing properties of the films. Hence heat annealed unsubstituted CuPc spin coated films can be used as nitrogen dioxide gas sensor.

Enhanced triethylamine sensing performance of metal–organic framework derived nest-type Fe-doped NiO nanostructure

2020 ◽  
Vol 7 (6) ◽  
pp. 1474-1482 ◽  
Author(s):  
Dongxue Wang ◽  
Chengbo Zhai ◽  
Liyong Du ◽  
Kuikun Gu ◽  
Mingzhe Zhang
Keyword(s):  
Response Time ◽  
Recovery Time ◽  
Gas Sensing ◽  
Metal Organic Framework ◽  
Quick Response ◽  
Fe Doping ◽  
Gas Sensing Properties ◽  
Metal Organic ◽  
Nest Type ◽  
Sensing Performance

The response of our Fe-doped NiO TEA sensor was about 21 times higher than that of the pure sensor. The quick response time and recovery time, good selectivity and stability, and enhanced gas sensing properties could be attributed to Fe-doping.

Schottky diodes based on 2D materials for environmental gas monitoring: a review on emerging trends, recent developments and future perspectives

2021 ◽  
Author(s):  
Minu Mathew ◽  
Chandra Sekhar Rout
Keyword(s):  
Gas Sensing ◽  
2D Materials ◽  
Schottky Diodes ◽  
High Sensitivity ◽  
Future Perspectives ◽  
Working Temperature ◽  
Emerging Trends ◽  
Gas Sensing Properties ◽  
Recent Developments ◽  
Sensitivity And Selectivity

This review details the fundamentals, working principles and recent developments of Schottky junctions based on 2D materials to emphasize their improved gas sensing properties including low working temperature, high sensitivity, and selectivity.

scholarly journals Correction: Controllable synthesis and enhanced gas sensing properties of a single-crystalline WO3–rGO porous nanocomposite

RSC Advances ◽  
2019 ◽  
Vol 9 (55) ◽  
pp. 32174-32174
Author(s):  
Hao Qin ◽  
Tie Liu ◽  
Jingyuan Liu ◽  
Qi Liu ◽  
Xiaoyan Jing ◽  
...  
Keyword(s):  
Gas Sensing ◽  
Controllable Synthesis ◽  
Single Crystalline ◽  
Sensing Properties ◽  
Gas Sensing Properties ◽  
Porous Nanocomposite

Correction for ‘Controllable synthesis and enhanced gas sensing properties of a single-crystalline WO3–rGO porous nanocomposite’ by Qin Hao et al., RSC Adv., 2017, 7, 14192–14199.

scholarly journals Controllable synthesis and enhanced gas sensing properties of a single-crystalline WO3–rGO porous nanocomposite

RSC Advances ◽  
2017 ◽  
Vol 7 (23) ◽  
pp. 14192-14199 ◽  
Author(s):  
Qin Hao ◽  
Tie Liu ◽  
Jingyuan Liu ◽  
Qi Liu ◽  
Xiaoyan Jing ◽  
...  
Keyword(s):  
Gas Sensing ◽  
Gas Detection ◽  
Controllable Synthesis ◽  
Single Crystalline ◽  
Sensing Properties ◽  
Porous Nanostructures ◽  
Gas Sensing Properties ◽  
Porous Nanocomposite

A single-crystalline WO3–rGO composite has been successfully prepared and applied into gas detection. Impressively, this permit-3D porous nanostructures display enhanced NO2 sensing properties.

scholarly journals Work Function Measurements in Single-Crystalline In2O3 for Conduction Modelling

Proceedings ◽  
2019 ◽  
Vol 14 (1) ◽  
pp. 54 ◽  
Author(s):  
Federico Schipani ◽  
Alexandru Oprea ◽  
Udo Weimar ◽  
Alexandra Papadogianni ◽  
Oliver Bierwagen
Keyword(s):  
Work Function ◽  
Gas Sensing ◽  
Single Crystalline ◽  
Sensing Properties ◽  
Gas Sensing Properties

To date, there are only a few studies on the gas sensing properties of single crystalline sensors. […]

Template-Free Synthesis and Assembly of Single-Crystalline Tungsten Oxide Nanowires and Their Gas-Sensing Properties.

ChemInform ◽  
2006 ◽  
Vol 37 (13) ◽  
Author(s):  
Julien Polleux ◽  
Alexander Gurlo ◽  
Nicolae Barsan ◽  
Udo Weimar ◽  
Markus Antonietti ◽  
...  
Keyword(s):  
Tungsten Oxide ◽  
Gas Sensing ◽  
Single Crystalline ◽  
Oxide Nanowires ◽  
Sensing Properties ◽  
Gas Sensing Properties ◽  
Template Free

WO3-Based Sensor Based on Hall Effect for NO2 Detection: Designed and Investigation

2010 ◽  
Vol 148-149 ◽  
pp. 1042-1046
Author(s):  
Jin Yang Lin ◽  
Yong Ai Zhang ◽  
Ling Jie Wang ◽  
Tai Liang Guo
Keyword(s):  
Magnetic Field ◽  
Response Time ◽  
Hall Effect ◽  
Tungsten Trioxide ◽  
Recovery Time ◽  
Room Temperature ◽  
Gas Sensing ◽  
Test Chamber ◽  
Tungsten Filament ◽  
Gas Sensing Properties

Novel tungsten oxide sensors were fabricated based on Hall Effect and their NO2 gas sensing properties were examined. Tungsten trioxide was grown by vapor evaporation of metal tungsten filament in an oxygen atmosphere. A WO3 thick film was deposited on the four Au electrode to be a WO3 sensor. The sensor was tested between magnetic field in a plastic test chamber. The gas sensing experiment revealed that at the NO2 concentration of 40 ppm, a sensitivity of 3.27, a response time of 36 s, and a recovery time of 45 s were observed at room-temperature. The effect of WO3 based on Hall Effect on the sensing characteristic is discussed.

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