Laboratory for Surface Modification (LSM)

Seminars Archives

September 2017 | October 2017 | November 2017

Thursday, October 05, 2017

Stephanie Law
Materials Science and Engineering
University of Delaware
Thursday, October 19, 2017

Abhay Narayan Pasupathy
Columbia University
12:00 Noon CHEM 260
Thursday, October 26, 2017

Gennady Shvets
Cornell University
12:00 Noon CHEM 260
Friday, October 27, 2017
Structural, optical and gas sensing properties of swift heavy ions irradiated metal oxide thin films
Azher Siddiqui
Department of Physics
Jamia Millia Islamia, New Delhi
1:30 pm - NPL 201

In this work, we report the effects of 100 MeV Ag9+ and O7+ ions irradiation on the structural, optical and gas sensing properties of thermally oxidized thin films of tin and indium. XRD, SEM and RBS techniques have been employed to study the structural, modifications induced in the films as a result of irradiation. It was observed that irradiation with 100 MeV Ag9+ and O7+ ions resulted in a decrease in the crystallinity of the films along with a decrease in the grain size due to increase in the lattice strain. The structural modifications induced have been correlated with the simulations based on the thermal spike model. The optical properties of the pristine and SHI irradiated films was examined using UV-Vis spectroscopy. It was noticed that the optical band gap of the films increased upon irradiation with 100 MeV Ag9+ and O7+ ions. The changes in the response characteristics of indium oxide and tin oxide films towards methane and hydrogen respectively due to SHI irradiation are extensively discussed.

You may also view a summary of past and upcoming seminars.