https://scholar.dgist.ac.kr/handle/20.500.11750/1921 2026-10-27T07:04:39Z https://scholar.dgist.ac.kr/handle/20.500.11750/61026 Title: Advances in Triboelectric Nanogenerators-Based Smart Infrastructure and IoT Applications Author(s): Behera, Swayam Aryam; Kaja, Kushal Ruthvik; Panda, Swati; Mohanty, Raj; Vivekananthan, Venkateswaran; Rajaboina, Rakesh Kumar; Kim, Hoe Joon; Khanapuram, Uday Kumar; Hajra, Sugato; Pitsalidis, Charalampos; Achary, P.G.R. Abstract: With the rapid development of today's infrastructure networks, there is now more need than ever before for self-reliant systems capable of lowering the reliance on human intervention and maintenance. The current methods used for smart infrastructures rely on energy-consuming sensors that can pose problems related to their limited life spans and high costs of maintenance and scalability. Even though wireless technologies have made it possible to monitor and control operations in real time, their dependence on power systems remains problematic. In this sense, TENGs serve as a viable solution to the problem through capturing mechanical energy to power self-powered sensing devices. The current review presents a comprehensive analysis of smart infrastructure systems with TENGs as the energy source for applications in smart building, transportation, environmental monitoring, agriculture, and Internet of Things platforms. In contrast to other studies, which primarily concentrate on developments in materials or devices, this study focuses on TENG-based smart infrastructure and applications. Major challenges and possible solutions are presented. Overall, this review highlights the transition from battery-dependent systems toward potentially autonomous and low-maintenance smart infrastructure, while discussing the remaining scientific and engineering challenges that must be addressed before widespread practical deployment. 2026-07-31T15:00:00Z https://scholar.dgist.ac.kr/handle/20.500.11750/61017 Title: Upcycling Disposable Food Plates Based Triboelectric Nanogenerator for Body Motion Sensing and Enhancing Cell Migration Author(s): Hajra, Sugato; Kaja, Kushal Ruthvik; Jena, Subhra Sulipta; Hong, Seonki; Panigrahi, Basanta Kumar; Panda, Swati; Pakawanit, Phakkhananan; Vittayakorn, Naratip; Kim, Hoe Joon Abstract: The rapid development of wearable and self-powered technologies has led to high demand for sustainable, low-cost energy-harvesting solutions. In this study, a triboelectric nanogenerator (TENG) was fabricated using discarded disposable plates as the positive triboelectric layer and waste nitrile gloves as the negative layer, demonstrating an effective method for converting waste into functional devices. The TENG worked in the single-electrode mode, producing a maximum output voltage of 170 V and a current of 240 nA. A peak power output of 32 & micro;W with an external load resistance of 500 M Omega was achieved using the fabricated TENG. Because of its consistent electrical performance, the TENG successfully powered small electronic devices such as a digital watch and a calculator. In addition to energy harvesting, the generated electrical output was used to stimulate biological activity in vitro, thereby increasing the migration of NIH/3T3 fibroblasts. Furthermore, the TENG could convert bodily movements into electrical energy. The combination of biomechanical sensing and electrically aided cell migration demonstrates the TENG's potential as a long-term platform for self-powered biomedical devices. 2026-06-30T15:00:00Z https://scholar.dgist.ac.kr/handle/20.500.11750/60969 Title: Curcumin-pectin based cotton patch for electro-assisted wound healing and behavioural monitoring Author(s): Panda, Swati; Hajra, Sugato; Kaja, Kushal Ruthvik; Jena, Subhra Sulipta; Belal, Mohamed A.; Pakawanit, Phakkhananan; Khanbareh, Hamideh; Vittayakorn, Naratip; Hong, Seonki; Qin, Jiaqian; Kim, Hoe Joon Abstract: Wound healing is a complex biological process essential for restoring tissue integrity. Delayed or non-healing skin wounds can lead to serious complications, including infection, scarring, clotting, and hemorrhage. Therefore, promoting tissue regeneration, remodeling, and effective wound monitoring is crucial. Electrical stimulation (ES) generated by triboelectric nanogenerators (TENGs) has recently attracted significant attention for accelerating wound healing. In this study, a TENG-powered wound-healing patch was developed using bio-derived pectin and curcumin. These active materials showed good in vitro antibacterial and anti-inflammatory properties, along with a pH-responsive release suitable for infected wound environments. Additionally, the wound-healing patch showed excellent in vitro biocompatibility and accelerated cell migration under ES generated by the TENG device. The TENG device generated electrical output voltage, current, and power of 60 V, 160 nA, and 2.7 & micro;W at 500 M ohm, respectively. In vivo animal studies confirmed accelerated wound healing with the self-powered wound-healing patch within 9 days. Notably, this study reports a biomaterial-based, multifunctional, self-powered wound-healing patch that combines antibacterial, anti-inflammatory, and pH-responsive therapeutic capabilities. Furthermore, a wearable TENG device was demonstrated for real-time pain assessment in an animal model. This study presents a self-powered, low-cost, easy-to-fabricate patch for both wound healing and monitoring, with promising potential for wearable healthcare technologies. 2026-09-30T15:00:00Z https://scholar.dgist.ac.kr/handle/20.500.11750/60952 Title: Candle soot-enhanced pyroelectric generator for thermal energy harvesting and self-powered sensing Author(s): Bhosale, Premkumar; Hajra, Sugato; Mistewicz, Krystian; Belal, Mohamed; Kaja, Kushal Ruthvik; Panigrahi, Basanta Kumar; Vittayakorn, Naratip; Kim, Hoe Joon Abstract: In recent years, there has been considerable interest in surface engineering using carbon-based coatings to improve pyroelectric performance. This work demonstrates a straightforward, economical method for a pyroelectric energy generator (PEG) using candle soot as a light-absorbing coating on a widely available PZT-based piezoelectric buzzer. Infrared (IR) lamp-induced thermal excitation was used to comprehensively assess the performance of the soot-coated and pristine PZT piezoelectric buzzer disk. Due to improved photothermal conversion, the coated PEG device exhibits a significant increase in electrical output. When exposed to the IR lamp, the short-circuit current reached approximately 204 nA, while the open-circuit voltage was approximately 4.8 V. Furthermore, under controlled thermal cycling, the device exhibited adjustable output and efficient energy storage. Further, the PEG was shown to be sensitive to temperature changes caused by human activity or the daily use of appliances, as well as to energy harvesting, suggesting its potential for self-powered sensing applications, such as breath monitoring, or converting energy from everyday appliances. Overall, this study presents a simple method to increase pyroelectric device performance efficiency in sensing and sustainable energy applications. 2026-09-30T15:00:00Z