Colloquium - Dr. Azher Majid Siddiqui | Department of Physics

Colloquium - Dr. Azher Majid Siddiqui

Event Information
Event Date: 
Tuesday, October 24, 2017 - 3:15pm
Event Location: 
Physics Building - Room 104

Professor

Department of Physics

University - Jamia Millia Islamia

Title: "Structural, optical and gas sensing properties of swift heavy ions irradiated metal oxide thin films"

Abstract:

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.

*Refreshments will be served before the colloquium*

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