Personal profile
Biography
Dr Ajay's current research investigates the design and microfabrication of surface acoustic wave (SAW) and Lamb wave sensors on arbitrary substrates to develop highly sensitive and precise devices for healthcare monitoring. In particular, he explores the interaction between acoustic waves and the overlaying sensing medium on these devices through multiple mechanisms at a fundamental level, and accordingly tunes the geometrical parameters and composition of both the device and sensing medium to attain a high figure-of-merit for the resultant sensor. In the past, Dr. Ajay has lead a project to develop mechanically bendable one-port Lamb wave resonator sensors on a novel multilayered substrate through facile microfabrication approach. He also possesses expertise on the growth and characterization of piezoelectric thick films, capable of launching acoustic waves on arbitrary substrates, through physical vapor deposition method.
Research interests
Acoustic wave sensors
Surface acoustic wave (SAW) microfluidics
Radio frequency (RF) magnetron sputtering
Photolithography
Monash teaching commitment
- ECE2071 - Systems Programming
- ECE4191 - Engineering Integrated Design
Education/Academic qualification
Surface Acoustic Wave Sensors, PhD in Engineering, Self-seeded ZnO nanowires on SAW sensors: on-chip growth and methods for sensitivity enhancement, Monash University Malaysia
1 Mar 2012 → 2 Feb 2016
Award Date: 9 Apr 2016
Electrical and Computer Systems Engineering, Bachelor of Engineering (Honours), Monash University Malaysia
18 Jul 2005 → 27 Jul 2009
Award Date: 5 Sept 2009
Research area keywords
- Surface Acoustic Waves
- thin films
- nanostructured sensing medium
- Piezoelectric Materials
Expertise related to UN Sustainable Development Goals
In 2015, UN member states agreed to 17 global Sustainable Development Goals (SDGs) to end poverty, protect the planet and ensure prosperity for all. This person’s work contributes towards the following SDG(s):
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SDG 3 Good Health and Well-being
Collaborations and top research areas from the last five years
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Battery-less Acoustic Wave Sensor System for Front-End Semiconductor Process Monitoring
Ramakrishnan, N. (Primary Chief Investigator (PCI)), Siang Piao, C. (Chief Investigator (CI)), Eng Seng, C. (Chief Investigator (CI)), Achath Mohanan, A. (Chief Investigator (CI)) & Khor, S. M. (Chief Investigator (CI))
1/12/25 → 30/11/27
Project: Research
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Investigation into 2D Material Nanocomposite Integrated Acoustic Wave Resonators as VOC Sensors to Detect Chemical Dumping in Wastewaters Screen reader support enabled.
Ramakrishnan, N. (Primary Chief Investigator (PCI)), Siang Piao, C. (Chief Investigator (CI)), Eng Seng, C. (Chief Investigator (CI)), Achath Mohanan, A. (Chief Investigator (CI)) & Saha, T. (Chief Investigator (CI))
7/09/21 → 6/07/24
Project: Research
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Monolithic CMOS-Surface Acoustic Wave Resonators as Volatile Organic Compound Gas Sensors: Suitable for Wearable and Smartphone Devices
Ramakrishnan, N. (Primary Chief Investigator (PCI)), Achath Mohanan, A. (Chief Investigator (CI)), Siang Piao, C. (Chief Investigator (CI)), Swamy, V. (Chief Investigator (CI)), Saha, T. (Chief Investigator (CI)), Teng Hwang, T. (Chief Investigator (CI)) & Soundara Pandian, M. (Chief Investigator (CI))
15/03/21 → 14/03/24
Project: Research
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Investigating the effects of non-uniform electrodes on spurious mode suppression in a langasite crystal sensor operating in harsh environments
Saha, T. (Primary Chief Investigator (PCI)), Siang Piao, C. (Chief Investigator (CI)), Ramakrishnan, N. (Chief Investigator (CI)) & Achath Mohanan, A. (Chief Investigator (CI))
1/09/19 → 31/05/23
Project: Research
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Investigation Into Effect of Wave Energy Confinement Using Bragg Reflector Towards Realizing Highly Sensitive Flexible Surface Acoustic Wave Sensors Integrated with Nanostructures
Achath Mohanan, A. (Primary Chief Investigator (PCI)), Chee Pin, T. (Chief Investigator (CI)) & Ramakrishnan, N. (Chief Investigator (CI))
1/01/19 → 31/03/22
Project: Research
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Investigation into mass-sensitivity enhancement of acoustically thick polymer sensing film-coated one-port SAW resonators
Wang, Q. & Mohanan, A. A., 1 Nov 2025, In: Physica B: Condensed Matter. 716, 10 p., 417698.Research output: Contribution to journal › Article › Research › peer-review
Open Access -
A new multi-layered substrate for facile fabrication of flexible one-port lamb wave resonator sensors
Dhillon, A. S. & Mohanan, A. A., 1 Nov 2023, In: IEEE Sensors Journal. 23, 21, p. 25824-25835 12 p.Research output: Contribution to journal › Article › Research › peer-review
1 Link opens in a new tab Citation (Scopus) -
Extraction of attenuation parameter in periodic shorted reflectors of one-port SAW resonator using scattering matrix approach
Kesuma, H. P., Ramakrishnan, N., Lan, B. L. & Achath Mohanan, A., 2023, In: IEEE Transactions on Instrumentation and Measurement. 72, 4 p., 6500404.Research output: Contribution to journal › Article › Research › peer-review
1 Link opens in a new tab Citation (Scopus) -
Mass loading characteristics of one-port SAW resonator with sensing film attached reflector electrodes
Kesuma, H. P., Wang, Q., Mohanan, A. A. & Ramakrishnan, N., Dec 2023, In: IEEE Sensors Letters. 7, 12, 4 p., 2505204.Research output: Contribution to journal › Article › Research › peer-review
7 Link opens in a new tab Citations (Scopus) -
Dual resonance modes in two-port SAW resonator sensors: an analysis through scattering matrix approach
Zhihong, K. Y., Mohanan, A. A. & Ramakrishnan, N., Aug 2022, In: Japanese Journal of Applied Physics. 61, 8, 12 p., 086505.Research output: Contribution to journal › Article › Research › peer-review
2 Link opens in a new tab Citations (Scopus)