https://scholar.dgist.ac.kr/handle/20.500.11750/9971 2026-04-22T02:58:17Z https://scholar.dgist.ac.kr/handle/20.500.11750/59987 Title: Dielectric Polarization-Driven Energy Amplification in 2D Nanostructure-Embedded PVC Gel TENGs for Tribo-Resistive Sensing Applications Author(s): Park, Hyosik; Gbadam, Gerald Selasie; Lee, Cheoljae; Joo, Hyeonseo; Gwak, Sujeong; Rojas, Orlando J.; Lee, Ju-hyuck Abstract: Plasticized poly(vinyl chloride) (PVC) gels are prototypical soft ionic polymers that combine strongly negative charge polarity with inherently high permittivity; however, their mobile ions impose substantial dielectric loss and leakage currents, which limit the output of triboelectric nanogenerators (TENGs). Here, graphene oxide (GO) nanosheets are embedded as 2D capacitive layers in a PVC gel, where they immobilize excess ions and add interfacial polarization, giving a dielectric constant of 32 at 1 kHz while lowering the dissipation factor (tan delta) by 65% relative to the pristine gel. The optimized GO-doped gel TENG delivers 282 V, 20.1 mu A, and 612 mu W/cm2-approximately 2.3, 2.0, and 2.5 times the values of the pristine PVC gel, respectively. A single GO-PVC gel layer simultaneously functions as both dielectric and electrode, powering a self-powered tribo-resistive sensor that pinpoints pressures up to 800 kPa over a 5 x 5 virtual grid, with a spatial resolution of approximate to 1.8 mm and pressure sensitivities of 194 mV/kPa (0-200 kPa) and 25 mV/kPa (200-800 kPa). By suppressing ion-driven loss while amplifying polarization, this 2D capacitive-layer strategy is transferable to other ionic-gel systems-including ionic-liquid gels and ionomers-charting a versatile route toward high-output soft TENGs for energy-autonomous wearables and electronic skin. 2026-01-31T15:00:00Z https://scholar.dgist.ac.kr/handle/20.500.11750/59895 Title: 마찰 대전 터치 센서, 마찰 대전 터치 센서의 구동 방법, 및 전자 기기 Author(s): 이주혁; 박효식 https://scholar.dgist.ac.kr/handle/20.500.11750/59888 Title: DC POWER GENERATION DEVICE USING CONDUCTIVE POLYMER GEL AND METHOD THEREOF Author(s): 박효식; 이주혁 Abstract: The present invention relates to a high-output DC electric energy generation device using a conductive polymer gel and, more particularly, to a technology for generating DC electric energy using a charge recombination mechanism through contact-separation and sliding methods, wherein a conductive polymer gel including a mixture of PVC and a plasticizer or a mixture of PVDF and an ionic liquid is disposed between upper and lower metal electrodes made of gold or aluminum. The present invention can provide stable and efficient DC power to various applications such as IoT sensors and small electronic devices by optimizing the thickness of the conductive polymer gel, the concentration of the plasticizer, the metal electrode material, and the like. In particular, the present invention can increase power efficiency through charge generation and accumulation processes performed by vertical and horizontal movements of the electrodes. https://scholar.dgist.ac.kr/handle/20.500.11750/59879 Title: 바이오 압전층의 제조 방법, 이를 이용하여 제조된 바이오 압전층, 압전 발전 소자의 제조 방법 및 이를 이용하여 제조된 압전 발전 소자 Author(s): 이주혁; 류연경 Abstract: 본 발명은 바이오 압전층의 제조 방법, 이를 이용하여 제조된 바이오 압전층, 압전 발전 소자의 제조 방법 및 이를 이용하여 제조된 압전 발전 소자를 개시한다. 본 발명은 제1 용매에 글리신 분말 및 제2 용매를 혼합하여 글리신 용액을 제조하는 단계; 상기 글리신 용액에 기판을 침지시키는 단계; 상기 기판을 상기 글리신 용액으로부터 끌어당겨 글리신 결정을 제조하는 단계;를 포함하는 것을 특징으로 한다.