Experimental and Theoretical NANOTECHNOLOGY (ETN) abbreviated as Exp. Theo. NANOTECHNOLOGY is a multidisciplinary peer-reviewed and open access journal. It includes specialized research papers, short communications, reviews and selected conference papers in special issues on the characterization, synthesis, processing, structure and properties of different principles and applications of nanotechnology with focus on advantageous achievements and applications for the specialists in engineering, chemistry, physics, materials science and medicine. ETN covers and publishes all aspects of fundamental and applied researches of experimental and theoretical nanoscale technology dealing with materials synthesis, processing, nanofabrication, nanoprobes, spectroscopy, properties, biological systems, nanostructures, nanoelectronics, nano-optics, nano-mechanics, nanodevices, nanobiotechnology, nanomedicine, nanotoxicology within the scope of the journal. ETN aims to acquire the recent and outstanding researches for the benefit of the human being.
Copolysiloxane solvent detector using Langmuir-Blodgett surface potential method
A quick detection for volatile organic compounds (VOCs), especially in the indoor environment is a must as the build-up level of VOCs is multiple times greater than outdoor environment. By using a surface potential probe, we have analyzed the interaction between copolysiloxane Langmuir-Blodgett (LB) thin films with several commercially used VOCs solvent, specifically chloroform (CHCl3), isopropyl alcohol (IPA) and dichloromethane (DCM). These copolysiloxane
LB thin films, namely P50:50 and P25:75 had been deposited onto aluminium-coated substrates. Subsequently, the surface potential (ΔV) of copolysiloxane LB thin films were monitored during exposure to each solvent. Interaction of these thin films with each solvent produced non-identical changes in ΔV values. In addition, ∆Vmax value and halftime response for half ∆Vmax value (t50) were determined. Later, a figure of merit, ƒ was calculated to determine the optimum sensing material per solvent. The most promising candidates particularly as IPA solvent vapour sensors is P50:50 copolysiloxanes LB thin film that presented ΔVmax (106 mV), smallest halftime response for half ∆Vmax value achieved, t50 (65 s), and considerable ƒ (1.631 mV/s), as compared to others.