Seminar

Engineering HDR Seminar Series 14, 2013: Investigations into Coupling of Resonance Phenomenon and Mass Loading Effect of Nanostructures Attached to Layered SAW Sensors

Mr Ajay Achath Mohanan, ECSE postgraduate student


Date: 2013-03-21
Time: 12:30 to 13:30
Venue: Engineering Meeting Room 1, 5-4-22


Abstract

It has been recently reported that high aspect ratio resonant structures attached to a SAW resonator in unison with a SAW resonator form a system of coupled resonators. These systems have prospect to function as highly sensitive SAW sensors especially for gas sensing applications. However, there is urgent need for experimental investigations and validations on the coupling of resonance phenomenon between resonant nanostructures such as nanowires, nanorods and nanopillars attached to the SAW device. Nanostructures are a suitable candidate for high aspect ratio structures and they also possess significant physical and chemical sensing characteristics. This research proposes to investigate into the phenomenon on system of coupled resonator made of vertically grown ZnO nanowires attached with ZnO/Si layered SAW resonator. Layered SAW devices are considered in the present work as they can propagate high frequency acoustic waves such as Sezawa waves, which is additional advantage for devising highly sensitive SAW sensors. The research findings will provide an insight into layered SAW sensors attached with nanostructure sensing medium to devise novel class of highly sensitive SAW sensors.

About the Speaker

Ajay Achath Mohanan graduated with Bachelor of Engineering (Electrical and Computer Systems Engineering with Honours) from Monash University Sunway Campus in 2009. He joined Monash University in 2012 for postgraduate studies under the supervision of Dr. Rajendran Parthiban and Dr. Narayanan Ramakrishnan. Prior to his postgraduate studies, he worked as a Process Engineer in Freescale Semiconductor Malaysia for 2 years. His research focus is on enhancing the sensitivity of layered surface acoustic wave (SAW) sensors using nanostructures as sensing medium.