Projects per year
Personal profile
Biography
Dr Ajay's current research is focused on design and fabrication of flexible high-performance ZnO-based surface acoustic wave (SAW) sensors integrated with zinc oxide (ZnO) nanostructures as sensing medium. In the past, he has worked on design and micro-fabrication of rigid lithium niobate-based SAW devices using a novel UV-LED photolithography technique, and on-chip integration of self-seeded ZnO nanowires as sensing medium on these devices using thermal evaporation method conducted at above 600 °C. The transition from rigid to flexible SAW sensors integrated with ZnO nanostructures requires the growth of highly piezoelectric ZnO thin film on flexible polymer substrates as medium for SAW propagation and a low-temperature growth method for on-chip integration of ZnO nanostructures. The growth of piezoelectric ZnO thin film on flexible polymer substrates is performed using RF magnetron sputtering in the Micro and Nano Devices Lab at Monash University Malaysia, and low temperature hydrothermal method is adopted for on-chip growth of ZnO nanowires as sensing medium.
Research interests
Flexible Surface acoustic wave (SAW) sensors, on-chip growth of nanostructures as SAW sensing medium
Monash teaching commitment
- ECE2071 - Computer Organisation and Programming
- ECE3091 - Engineering Design
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):
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
- Flexible surface acoustic wave (SAW) sensors
- On-chip growth of nanostructures as SAW sensing medium
Collaborations and top research areas from the last five years
Projects
- 5 Finished
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Monolithic CMOS-Surface Acoustic Wave Resonators as Volatile Organic Compound Gas Sensors: Suitable for Wearable and Smartphone Devices
Ramakrishnan, N., Achath Mohanan, A., Siang Piao, C., Swamy, V., Saha, T., Teng Hwang, T. & Soundara Pandian, M.
15/03/21 → 14/03/24
Project: Research
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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 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 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
4 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
1 Citation (Scopus) -
Scattering matrix approach to design of one-port surface acoustic wave resonator sensors utilizing reflectors as sensing element
Kesuma, H. P., Ramakrishnan, N., Lan, B. L., Dhillon, A. S. & Achath Mohanan, A., Apr 2021, In: IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control. 68, 4, p. 1418-1429 12 p.Research output: Contribution to journal › Article › Research › peer-review
6 Citations (Scopus)