Jul 22, 2014, 11:38 AM
News Code: 2722002
0 Persons
Gas detector developed in Karaj

Tehran, July 22, IRNA - Researchers at the Materials and Energy Research Center in Karaj, Alborz province have developed a gas sensor based on indium (III) oxide (In2O3) nanorods to detect nitrogen dioxide (NO2), which is a toxic gas.

Some underground coal mine operators have experienced excessive NO2 emissions. The gas sensor could detect NO2 rapidly in coal mines, said Tuesday's edition of 'Iran Daily'.

In the research, In2O3 nanoparticles synthesizes for gas sensor application.

Then, in the calcination step, In2O3 nanoparticles with rough surfaces were obtained.

These nanoparticles were deposited by electrophoretic deposition between the inter-digitated electrodes to fabricate gas sensor. Deposition resulted in the chained nanoparticles in the inter-electrode space.

A characteristic feature of electrophoretic deposition process is that colloidal particles suspended in a liquid medium migrate under the influence of an electric field (electrophoresis) and are deposited onto an electrode.

All colloidal particles that can be used to form stable suspensions and carry a charge could be used in electrophoretic deposition. This includes materials such as polymers, pigments, dyes, ceramics and metals.