About

Areas of specialism

Wearable and flexible piezo/triboelectric nanogenerators for energy harvesting & autonomous sensing applications, Solar cells, Anti-reflection coatings, and Hybrid energy cells.

My qualifications

Ph.D. in Electronics & Radio Engineering
Kyung Hee University, South Korea
M.Tech. in Material Science & Engineering
Indian Institute of Technology (IIT) Kanpur, India

Previous roles

01 September 2018 - 30 September 2019
Postdoctoral Fellow at the Department of Electronic Engineering
Kyung Hee University, South Korea.
July 2012 - December 2013
Teaching Faculty Member at the Department of Physics
K L University, India.

Affiliations and memberships

Royal Society of Chemistry
MRSC
Materials Research Society
Member

Supervision

Postgraduate research supervision

Publications

Bhaskar Dudem, R. D. Ishara G Dharmasena, Raheel Riaz, Venkateswaran Vivekananthan, K. G. U Wijayantha, Paolo Lugli, Luisa Petti, S. Ravi P Silva (2022)Wearable Triboelectric Nanogenerator from Waste Materials for Autonomous Information Transmission via Morse Code, In: ACS applied materials & interfaces14(4)pp. 5328-5337 Amer Chemical Soc

Electronic waste produced by plastic, toxic, and semiconducting components of existing electronic devices is dramatically increasing environmental pollution. To overcome these issues, the use of eco-friendly materials for designing such devices is attaining much attention. This current work presents a recycled material-based triboelectric nanogenerator (TENG) made of plastic waste and carbon-coated paper wipes (C@PWs), in which the PWs are also collected from a waste bin. The resultant C@PW-based TENG is then used for powering low-power electronic devices and, later, to generate a Morse code from a wearable for autonomous communication. In this application, the end users decode the Morse code from a customized LabVIEW program and read the transmitted signal. With further redesigning, a 9-segment keyboard is developed using nine-TENGs, connected to an Arduino controller to display the 9-segment actuation on a computer screen. Based on the above analysis, our C@PW-TENG device is expected to have an impact on future self-powered sensors and internet of things systems.

Bhaskar Dudem, R.D. Ishara G Dharmasena, Sontyana Adonijah Graham, Jung Woo Leem, Harishkumarreddy Patnam, Anki Reddy Mule, S. Ravi P Silva, Jae Su Yu (2020)Exploring the theoretical and experimental optimization of high-performance triboelectric nanogenerators using microarchitectured silk cocoon films, In: Nano energy74 Elsevier Ltd

Triboelectric nanogenerators (TENGs) developed using eco-friendly natural materials instead of traditional electronic materials are more favorable for biocompatible applications, as well as from a sustainable life-cycle analysis perspective. Microarchitectured silkworm fibroin films with high surface roughness and an outstanding ability to lose electrons are used to design TENGs. An alcohol-annealing treatment is utilized to strengthen the resistance of the silk film (SF) against humidity and aqueous solubility. Herein, for the first time, the distance-dependent electric field theoretical model is employed to optimize the TENG parameters to achieve high output, which shows excellent agreement with the experimental outputs of SF-based TENG. The alcohol-treated microarchitectured SF (AT-MASF) with a polytetrafluoroethylene positive contact exhibits a stable and high electrical output even in harsh environments. These studies can lead us closer to the attractive future vision of realizing biodegradable TENG systems for harness/sensing various biomechanical activities even under real/humid environments. The potential and real-time application of the proposed AT-MASF-based TENG is demonstrated by directly employing its electric power to drive a number of low-power portable electronics and for sensing in human-body centric activities.

BHASKAR DUDEM, RANDUNU DEVAGE ISHARA GIHAN DHARMASENA, Raheel Riaz, VIVEKANANTHAN VENKATESWARAN, K.G.U. Wijayantha, Paolo Lugli, Luisa Petti, S RAVI PRADIP SILVA (2022)Wearable Triboelectric Nanogenerator from Waste Materials for Autonomous Information Transmission via Morse Code, In: ACS applied materials & interfaces American Chemical Society

Electronic waste produced by plastic, toxic, and semiconducting components of existing electronic devices is dramatically increasing environmental pollution. To overcome these issues the use of eco-friendly materials for designing such devices are attaining great concern. This current work presents a recycled materials-based triboelectric nanogenerator (TENG) made of plastic waste and carbon-coated paper wipes (C@PWs), in which the PWs also collected from a waste bin. The resultant C@PWs-based TENG is then used for powering low-power electronic devices, and later, to generate a Morse code from a wearable for autonomous communication. Other end-users in a customized LabVIEW programme decode the Morse code signals and read the transmitted message. With further redesigning, a 9-segment keyboard is developed using nine-TENGs, connected to an Arduino controller to display the 9-segment actuation on a computer screen. Based on the above analysis, our C@PW-TENG device is expected to have an impact on future self-powered sensors and IoT systems.

Bhaskar Dudem, Sontyana Adonijah Graham, R.D. Ishara G Dharmasena, S. Ravi P Silva, Jae Su Yu (2021)Natural silk-composite enabled versatile robust triboelectric nanogenerators for smart applications, In: Nano energy83105819 Elsevier

Strategies to maximize the surface charge density across triboelectric layers while protecting it from humidity are crucial in employing triboelectric nanogenerators (TENGs) for commercial/real-time applications. Herein, for the first time, we propose the utility of crystalline silk microparticles (SMPs) to improve the surface charge density in materials like polyvinyl alcohol to realise its applicability for TENG devices. Moreover, these SMPs are extracted from discarded Bombyx mori silkworm cocoons by facile, inexpensive, and single-step alkaline-hydrolysis treatment. We examine the performance of these composites with counter-materials composed of waste PTFE plastic cups to show reuse in recycled products. The processing cost of TENG developed from recycled materials is not only low but eco-friendly. The TENG performance as a function of the concentration of SMPs is investigated and compared with the composite's work-function and surface-potentials, with the distance-dependent electric field theoretical model employed to optimize the performance. Consequently, the optimized TENG exhibits maximum output voltage, current, charge, and power density of ∼280 V, 17.3 μA, 32.5 nC, and 14.4 W·m−2, respectively, creating a highly competitive energy harvester that can conform to the rigorous needs of wearables and mobile applications. Furthermore, the fully packaged silicone rubber device protects it from humidity and enables the device utility for practical applications with a soft, comfortable, and skin-friendly interface.

Additional publications