Effect of Nanotube Aspect Ratio on Chemical Vapour Sensing Properties of Polymer/MWCNT Composites

2012 ◽  
Vol 21 ◽  
pp. 117-123 ◽  
Author(s):  
G. Sakale ◽  
D. Jakovlevs ◽  
I. Aulika ◽  
Maris Knite
Keyword(s):  
Carbon Nanotubes ◽  
Volatile Organic Compounds ◽  
Organic Compounds ◽  
Electrical Resistance ◽  
Chemical Vapour ◽  
Length Change ◽  
Resistance Change ◽  
Sensing Properties ◽  
Multi Wall Carbon Nanotubes ◽  
Volatile Organic

The main topic of this paper is the study of polyisoprene-multi wall carbon nanotubes (PiMWCNT) composites electrical conductivity and volatile organic compound sensing properties with respect to type of multi wall carbon nanotubes used. Electrical percolation parameters like percolation threshold and critical exponent of produced composites are determined and analyzed. PiMWCNT composites exhibit a promising sensitivity to the presence of volatile organic compounds. Therefore the composites sensing mechanism of volatile organic compounds are analyzed in more detail by applying an original measuring technique which enables simultaneous measurement of an electrical resistance, mass and length change measurement of the sample in the presence and subsequent absence of a vapour. Measurement results enabled the evaluation of both vapour diffusion behavior in the composite and electrical resistance change mechanism.

Ag/SnO2/graphene ternary nanocomposites and their sensing properties to volatile organic compounds

2016 ◽  
Vol 659 ◽  
pp. 127-131 ◽  
Author(s):  
Sheng Ge ◽  
Hanxiong Zheng ◽  
Yufeng Sun ◽  
Zhen Jin ◽  
Jianhua Shan ◽  
...  
Keyword(s):  
Volatile Organic Compounds ◽  
Organic Compounds ◽  
Sensing Properties ◽  
Volatile Organic

FILMS SPIN-COATED WITH GALLIC ACID AND THE DETECTION OF SPUN FILMS AGAINST VOLATILE ORGANIC COMPOUNDS

2019 ◽  
Vol 27 (02) ◽  
pp. 1950106
Author(s):  
SİBEL ŞEN
Keyword(s):  
Thin Films ◽  
Volatile Organic Compounds ◽  
Gallic Acid ◽  
Organic Compounds ◽  
Gas Sensing ◽  
Quartz Substrate ◽  
Methanol Vapor ◽  
Sensing Properties ◽  
Gas Sensing Properties ◽  
Volatile Organic

To determine thin films’ properties of commercially available gallic acid molecule, they were deposited onto a suitable substrate using spin coater. UV–Visible absorption spectroscopy and atomic force microscopy (AFM) were employed for the characterization of the deposited thin films. Characterization results obtained by these two techniques indicated that the gallic acid molecules are suitable for transfer onto a glass or quartz substrate. Gas-sensing properties and thickness of these thin films were elucidated using surface plasmon resonance (SPR). Thickness values of spun thin films were obtained at different spinning speeds. Then, the gas-sensing properties were examined by exposing them to the vapors of four volatile organic compounds (VOCs). It was found that the spun films of this material were selective for methanol vapor yielding rapid response and recovery time and thin films of gallic acid exhibited reversible changes in the optical behavior, which makes them suitable for practical methanol-detection applications.

Volatile Organic Compounds and Dimethyl Methyl Phosphonate (DMMP) Sensing Properties of the Metal Oxide Functionalized QCM Transducers at Room Temperature

2017 ◽  
Vol 164 (13) ◽  
pp. B657-B664 ◽  
Author(s):  
Arif Kösemen ◽  
Sadullah Öztürk ◽  
Zafer Şen ◽  
Zühal Alpaslan Kösemen ◽  
Mika Harbeck ◽  
...  
Keyword(s):  
Volatile Organic Compounds ◽  
Metal Oxide ◽  
Organic Compounds ◽  
Room Temperature ◽  
Sensing Properties ◽  
Volatile Organic
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