Related Experiment Video
Updated: Dec 21, 2025

Preparation of Silicon Nanowire Field-effect Transistor for Chemical and Biosensing Applications
Published on: April 21, 2016
Local grain-to-grain conductivity in an SnO2-V2O5 nanocomposite ethanol sensor
Chitra Muthukumaravel1, Uthayarani Karunakaran1, Geramilla Mangamma2
1Department of Physics, Sri Ramakrishna Engineering College, Coimbatore 641022, Tamilnadu, India.
None:
Nanocrystalline tin oxide-vanadium oxide (SnO2-V2O5) nanocomposite was prepared by the hydrothermal route. Morphological and conductive atomic force microscopy studies were employed to explore the properties of the interface between the grains and grain boundaries of these binary oxides. Detailed analysis of this nanocomposite revealed that the barrier height of 0.512 eV favours a pronounced sensitivity of 63.99% towards 160 ppm of ethanol at room temperature. This might also be due to the decrease in the resistance from 2000 MΩ (individual SnO2) to 830 MΩ (nanocomposite). The synergistic effect, large surface area, greater number of interfaces and more conduction electrons provide a greater number of surface active sites for the nanocomposite. This leads to the nanocomposite showing better sensing performance than the corresponding individual systems.
More Related Videos
Related Concept Videos
Electrical Conductivity
In a practical conductor, an applied electric field may be sustained, causing a flow of electrons, which produce a current. The differential form of the current, the current density, is related to the electric field.
More generally, it is related to the force per unit charge, which involves the...
Potentiometry: Membrane Electrodes
Controlled-Potential Coulometry: Electrolytic Methods
The chosen potential...

