Junhwan Choi

A wirelessly powered, light-controlled, bioresorbable stimulation system with programmable polyphasic waveforms

Jong Uk Kim, Seung Gi Seo, H Wang, Eric Rytkin et autres

us, kr, sg (code pays fourni par la source)

64‐3: Low‐Voltage Organic Thin‐Film Transistors and Neuromorphic Devices Enabled by High‐k Polymer Dielectrics

Junhwan Choi

Polymer dielectric materials play a critical role in enabling low‐power and mechanically compliant organic electronic devices. In this study, the development of vapor‐deposited polymer dielectric materials and their device applications are presented. First, a high‐k copolymer dielectric based on poly(2‐cyanoethyl acrylate‐co‐diethylene glycol …

kr (code pays fourni par la source)

A High‐Hole Mobility Tellurium Transistor With Electron‐Donating Passivation Layer for Scalable, High‐Throughput Electronics

Taehyun Nam, Seung Min Lee, Chungryeol Lee, Changhyeon Lee et autres

ABSTRACT The demand for high‐performance semiconductors that can be processed layer‐by‐layer at low temperatures is rapidly growing to overcome scaling limits in future electronics. Unlike well‐developed n‐type materials, achieving high‐performance p‐type counterparts remains challenging. Tellurium (Te) is a promising candidate due to …

kr (code pays fourni par la source)

An Ultrathin, Cyano‐Functionalized Copolymeric Memristor by iCVD Process for Driving Convolutional Neural Networks of High‐Resolution Images

Ji In Kim, Myeong-Seob So, Woo Jin Wang, Taehoon Kim et autres

For on-chip learning, ideal weight storage elements should have scalability, data retention, symmetry and linear conductance modulation, and weight fine-tuning capabilities. In this study, memristors are fabricated by employing cyano-based ultrathin copolymer films (<10 nm) using 2-cyanoethyl acrylate (CEA) and di(ethylene glycol) …

kr (code pays fourni par la source)

Transistor‐Level Activation Functions via Two‐Gate Designs: From Analog Sigmoid and Gaussian Control to Real‐Time Hardware Demonstrations

Jun-Hyung Cho, Young-Min Han, Won‐Woo Lee, Youngwoo Yoo et autres

Abstract Tunable analog activation functions are essential for energy‐efficient artificial intelligence (AI) hardware. Two transistor designs are presented: the sigmoid‐like activation function transistor (SA‐transistor) and the Gaussian‐like activation function transistor (GA‐transistor), which implement analog sigmoid and Gaussian functions using a screen gate …

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Biodegradable, three-dimensional colorimetric fliers for environmental monitoring

Jin‐Tae Kim, Hyeon-Su Kim, Jae‐Young Yoo, Minsu Park et autres

Recently reported winged microelectronic systems offer passive flight mechanisms as a dispersal strategy for purposes in environmental monitoring, population surveillance, pathogen tracking, and other applications. Initial studies indicate potential for technologies of this type, but advances in structural and responsive materials and …

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Subject-Embedded Vision Transformer with Transfer Learning for Cross-Subject Dynamic Hand Gesture Recognition Using HD-sEMG

Jirou Feng, Xingce Bao, Junhwan Choi, Seulki Kyeong et autres

Hand gesture recognition (HGR) is crucial in developing advanced prosthetics, neurorobotics, and human-robot interaction (HRI). Surface electromyography (sEMG) and high-density sEMG (HD-sEMG) have gained attention for their ability to capture the muscle activity underlying hand gestures. Although many models achieve high performance …

kr, ch (code pays fourni par la source)

Quantized-memristor-enabled generative AI for predictive skin laser treatment imaging

Nam Ju Kim, Jun‐Hwe Cha, Yeong Kwon Kim, Jungyeop Oh et autres

kr (code pays fourni par la source)

A unipolar-driven synaptic transistor for environment-adaptable vision system

Sukwon Jang, Keunho Soh, Chungryeol Lee, Taehyun Nam et autres

Unlike conventional synapses in neural networks relying on bipolar spike-driven modulation, biological synapses in the peripheral nervous system handle unipolar input based on stimulus intensity, generating excitatory or inhibitory signals. Here, we demonstrate a unipolar-driven synaptic transistor (UDST) that exhibits both responses …

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Photoresponsive dual-mode memory transistor for optoelectronic computing: charge storage and synaptic signal processing

Gyeongho Lee, Sunwoo Jeong, Hyeonjung Kim, Yeong Jae Kim et autres

This study presents dual-mode memory transistor that accommodates memory and synaptic operations utilizing photoinduced charge trapping at the interface between poly(1,4-butanediol diacrylate) (pBDDA) and Parylene dielectric layer. Memory characteristics were implemented based on the photoresponsivity of dinaphtho[2,3- b :2′,3′- f ]thieno[3,2- b …

kr (code pays fourni par la source)

A two-step impedance inversion integrating domain adaptation and AVO analysis for the area away from wells

Jeonghun Yoo, Dokyeong Kim, Joongmoo Byun, Junhwan Choi et autres

kr (code pays fourni par la source)

Study on Dry Etching of iCVD‐Grown pV3D3 Dielectric Polymer Film

Jueun Baek, Yu‐Kyung Kim, Jeong‐Hoon Oh, Junghyun Park et autres

Abstract Polymer dielectric materials are promising candidates for next‐generation electronics due to their cost‐effectiveness, molecular‐level structural tunability, and mechanical deformability. Among various fabrication techniques, initiated chemical vapor deposition (iCVD) enables high‐purity polymer dielectric films with robust insulating properties. However, the lack of …

kr (code pays fourni par la source)