Silicon Microhotplate Arrays as a Platform for Efficient Gas Sensing Thin Film Research

Solid-state NMR has proven to be a versatile technique for studying the chemical structure, 3D structure and dynamics of all sorts of chemical compounds. In nanotechnology and particularly in thin films, the study of chemical modification, molecular packing, end chain motion, distance determination and solvent-matrix interactions is essential for controlling the final product properties and applications. Despite its atomic-level research capabilities and recent technical advancements, solid-state NMR is still lacking behind other spectroscopic techniques in the field of thin films due to the underestimation of NMR capabilities, availability, great variety of nuclei and pulse sequences, lack of sensitivity for quadrupole nuclei and time-consuming experiments. This article will comprehensively and critically review the work done by solid-state NMR on different types of thin films and the most advanced NMR strategies, which are beyond conventional, and the hardware design used to overcome the technical issues in thin-film research.

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Ammonia gas sensing with tin oxide thin film sensor and coplanar microheater

10.1063/5.0031525 ◽

2020 ◽

Author(s):

Shobi Bagga ◽

Jamil Akhtar ◽

Sanjeev Mishra

Keyword(s):

Thin Film ◽

Tin Oxide ◽

Gas Sensing ◽

Oxide Thin Film ◽

Film Sensor ◽

Ammonia Gas ◽

Thin Film Sensor

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Optical, electrical, and gas sensing properties of chloroaluminium phthalocyanine thin film

Optik ◽

10.1016/j.ijleo.2021.166762 ◽

2021 ◽

pp. 166762

Author(s):

Mohammad Esmaeil Azim Araghi ◽

Mostafa Parandin

Keyword(s):

Thin Film ◽

Gas Sensing ◽

Sensing Properties ◽

Gas Sensing Properties

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Study of Thin Film Tin Oxide for Reliability as Gas Sensing Material

2020 4th IEEE Electron Devices Technology & Manufacturing Conference (EDTM) ◽

10.1109/edtm47692.2020.9117957 ◽

2020 ◽

Author(s):

Ravi Shankar ◽

Tien Choy Loh ◽

Le Khaing Le ◽

Chun Wei Khor ◽

Shian Yeu Kam ◽

...

Keyword(s):

Thin Film ◽

Tin Oxide ◽

Gas Sensing ◽

Sensing Material

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Effect of Temperature on the Electrical and Gas Sensing Properties of Polyaniline and Multiwall Carbon Nanotube Doped Polyaniline Composite Thin Films

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.254.167 ◽

2011 ◽

Vol 254 ◽

pp. 167-170 ◽

Cited By ~ 1

Author(s):

Subodh Srivastava ◽

Sumit Kumar ◽

Vipin Kumar Jain ◽

Y.K. Vijay

Keyword(s):

Thin Film ◽

Thin Films ◽

Gas Sensing ◽

Hydrogen Gas ◽

Composite Thin Film ◽

Effect Of Temperature ◽

Multiwall Carbon Nanotube ◽

Film Sensor ◽

Composite Thin Films ◽

Pani Composite

In the present work we have reported the effect of temperature on the gas sensing properties of pure Polyaniline (PANI) and Multiwall carbon nanotube (MWNT) doped PANI composite thin film based chemiresistor type gas sensors for hydrogen gas sensing application. PANI and MWNT doped PANI composite were synthesized by in situ chemical oxidative polymerization of aniline using ammonium persulfate in an acidic medium. The thin sensing film of chemically synthesized PANI and MWNT doped PANI composite were deposited onto finger type Cu-interdigited electrodes using spin cast technique to prepared chemiresistor type gas sensor. The electrical properties of these composite thin films were characterized by I-V measurements as function of temperature. The I-V measurement revealed that conductivity of composite thin films increased as the temperature increased. The changes in resistance of the composite thin film sensor were utilized for detection of hydrogen gas. It was observed that at room temperature, MWNT doped PANI composite sensor shows higher response value and sensitivity with good repeatability in comparison to pure PANI thin film sensor. It was also observed that both PANI and MWNT doped PANI composite thin film based sensors showed unstable behavior as the temperature increased. The surface morphology of these composite thin films has also been characterized by scanning electron microscopy (SEM) measurement.

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