https://scholar.dgist.ac.kr/handle/20.500.11750/4341 2026-11-15T16:21:49Z 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; Sulipta, Jena Subhra; 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; Sulipta, Jena Subhra; Belal, Mohamed Ahmed; 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/20.500.11750/60873 Title: SAFE: a Mix-and-Read Assay for miRNA Detection in Extracellular Vesicles From Unprocessed Plasma Toward Clinical Disease Diagnosis Author(s): Sulipta, Jena Subhra; Kim, Soo Jin; Jang, Hyeonha; Chi, Lianhua; Eom, Yunji; Doh, Kyung-Oh; Lee, JaeJong; Park, Jun Seok; Lee, Junyeop; Hong, Seonki Abstract: Rapid and accurate diagnosis of cardiovascular disease (CVD) is essential for timely intervention, yet current workflows often rely on hospital-based instrumentation that can delay decision-making. We present SAFE (Sonication-Assisted liposome Fusion with Extracellular vesicles (EVs)), a rapid, direct-from-plasma assay that quantifies microRNAs (miRNAs) encapsulated within EVs in approximately 10 min, providing a molecular signature of myocardial injury. SAFE delivers molecular beacons (MBs) into endogenous EVs through liposome fusion, eliminating the need for EV isolation and RNA extraction while minimizing interference from plasma proteins by confining hybridization within the EV lumen. Brief sonication accelerates fusion kinetics, shortening the assay time to 10 min. In a pilot clinical evaluation involving patients with CVD (n = 20) and healthy controls (n = 15), SAFE detected elevated levels of two cardiac-associated miRNAs (miR-133a and miR-208a), achieving a diagnostic accuracy of 91.4% for each. These findings position SAFE as a rapid and minimally processed platform for the direct quantification of EV-associated miRNAs, well suited for time-critical CVD triage and ready for implementation studies across diverse clinical environments. 2026-06-30T15:00:00Z https://scholar.dgist.ac.kr/handle/20.500.11750/60860 Title: Beyond Molecular Determinism: State-Convergent Polymerization as a Functional Design Principle Under Chemical Complexity Author(s): Hong, Seonki Abstract: Polymeric materials are traditionally designed by prescribing molecular structures and reaction pathways. However, many functional polymers-exemplified by natural melanins and synthetic polydopamine-operate reproducibly despite persistent molecular heterogeneity and ill-defined architectures. Here, I propose state-convergent polymerization (SCP) as a design logic for polymeric materials formed under chemical complexity, in which polymerization is defined by convergence toward a functional material state rather than a discrete molecular structure. In SCP, polymer formation emerges from dynamically evolving pools of reactive motifs confined within environmentally bounded chemical state spaces. Crucially, these state spaces are chemically addressable through experimentally accessible variables such as pH, redox conditions, oxygen availability, and interfacial confinement, enabling multiple reaction trajectories to coexist while enforcing functional convergence. By decoupling polymer function from molecular determinism, SCP provides a materials design framework for materials operating under chemical complexity, including biointerfaces, adaptive coatings, and open-system polymerization processes. This perspective reframes polymer synthesis from structure prescription toward state engineering, offering actionable principles for designing robust functional materials beyond molecular precision. 2026-06-30T15:00:00Z