Abstract
Carbonaceous materials have recently received attention in electronic applications and measurement systems. In this work, we demonstrate the electrical behavior of carbon films fabricated by methane arc discharge decomposition technique. The current-voltage (I-V) characteristics of carbon films are investigated in the presence and absence of gas. The experiment reveals that the current passing through the carbon films increases when the concentration of CO2 gas is increased from 200 to 800 ppm. This phenomenon which is a result of conductance changes can be employed in sensing applications such as gas sensors.
Highlights
Continuous emission of carbon dioxide (CO2) and other greenhouse gases by industrial activities has been increased recently and has led to global warming
There are three configurations for installing the electrodes on the PCB board, namely, plane to plane (PTP), tip to plane (TTP), and tip to tip (TTT); in this study, we have only investigated the TTT structure
Results of optical emission spectroscopy The optical emission during arc discharge decomposition was captured in the wavelengths ranging from 385 to 750 nm through a spectrophotometer (StellarNet, Tampa, FL, USA), and the data of the recorded spectra was sketched using MATLAB software
Summary
Continuous emission of carbon dioxide (CO2) and other greenhouse gases by industrial activities has been increased recently and has led to global warming This calls for the need to develop low-cost, sensitive, resettable sensors that can be used to monitor the CO2 concentration in industrial exhaust gases [1,2,3]. Over the past few years, graphene and carbon nanotubes have become the center of attention in the sensor manufacturing technology [4,5,6,7,8] Their unique electrical properties such as tunable conductance and high charge mobility make them ideal for application as sensing medium in nanotechnology [9,10]. At the end of this process, a fine soot of carbonaceous material remains between
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