† indicates equal contribution and * indicates corresponding author(s).
[2025]
[51] An Ultrathin, Cyano-Functionalized Copolymeric Memristor by iCVD Process for Driving Convolutional Neural Networks of High-Resolution Images
Ji In Kim†, Minsu So†, Woo Jin Wang†, Taehoon Kim†, Eun Su Jeong, Kyumin Sim, Hamin Park, Sung Kyu Kim, Yong Goo Shin*, Junhwan Choi* and Min Ju Kim*
Advanced Science 2025, e11801 (Early View).
[50] Transistor-Level Activation Functions via Two-Gate Designs: From Analog Sigmoid and Gaussian Control to Real-Time Hardware Demonstrations
Junhyung Cho†, Youngmin Han†, Won Woo Lee†, Youngwoo Yoo, Kannan Udaya Mohanan, Chang-Hyun Kim, Junhwan Choi, Young-Joon Kim*, Wonjun Shin* and Hocheon Yoo*
Advanced Materials 2025, e11018 (Early View).
[49] Quantized-Memristor-Enabled Generative AI for Predictive Skin Laser Treatment Imaging
Namju Kim†, Jun-Hwe Cha†, Yeong Kwon Kim†, Jungyeop Oh, Inyong Kim, Minkyu Jeong, Junhwan Choi and Byung Chul Jang*
Device 2025, 3, 100908.
[48] A Unipolar-Driven Synaptic Transistor for Environment-Adaptable Vision System
Sukwon Jang†, Keunho Soh†, Chungryeol Lee†, Taehyun Nam, Minjae Jang, Jeong-ik Park, Changhyeon Lee, Junhwan Choi, Jung Ho Yoon* and Sung Gap Im*
Nature Communications 2025, 16, 7636.
[47] Photoresponsive Dual-Mode Memory Transistor for Optoelectronic Computing: Charge Storage and Synaptic Signal Processing
Gyeongho Lee†, Sunwoo Jeong†, Hyeonjung Kim†, Yeong Jae Kim, Seyong Oh*, Junhwan Choi* and Hocheon Yoo*
npj Flexible Electronics 2025, 9, 65.
<JCR < 2%, Impact factor = 15.5>
DOI: https://doi.org/10.1038/s41528-025-00444-1
Highlighted in 단국대학교 뉴스, 연합뉴스, 전자신문, 뉴시스, 뉴스1, 아이뉴스24, 베리타스알파
[46] Study on Dry Etching of iCVD-Grown pV3D3 Dielectric Polymer Film
Jueun Baek, Yukyung Kim, Jeonghoon Oh, Junghyun Park, Kwang Hyeon Baik, Soohwan Jang* and Junhwan Choi*
Small Methods 2025, 2500744, Early View.
<JCR < 15%, Impact factor = 9.1>
[45] MoS2 Channel-Enhanced High-Density Charge Trap Flash Memory and Machine Learning-Assisted Sensing Methodologies for Memory-Centric Computing Systems
Ki Han Kim†, Ju Han Park†, Khang June Lee†, Ji-Won Seo, Yeong Kwon Kim, Junhwan Choi, Min-Jae Seo* and Byung Chul Jang*
Advanced Science 2025, 12, e01926.
[44] Tunneling Dielectric Thickness-Dependent Behaviors in Transistors Based on Sandwiched Small Molecule and Insulating Layer Structures
Dong Hyun Lee†, Yunchae Jeon†, Junhwan Choi* and Hocheon Yoo*
Advanced Electronic Materials 2025, 11, 2400910 (Front Cover).
[43] Millimetre-scale bioresorbable optoelectronic systems for electrotherapy
Yamin Zhang†, Eric Rytkin†, Liangsong Zeng†, Jong Uk Kim†, Lichao Tang†, Haohui Zhang†, Aleksei Mikhailov, Kaiyu Zhao, Yue Wang, Li Ding, Xinyue Lu, Anastasia Lantsova, Elena Aprea, Gengming Jiang, Shupeng Li, Seung Gi Seo, Tong Wang, Jin Wang, Jiayang Liu, Jianyu Gu, Fei Liu, Keith Bailey, Yat Fung Larry Li, Amy Burrell, Anna Pfenniger, Andrey Ardashev, Tianyu Yang, Naijia Liu, Zengyao Lv, Nathan S. Purwanto, Yue Ying, Yinsheng Lu, Claire Hoepfner, Altynai Melisova, Jiarui Gong, Jinheon Jeong, Junhwan Choi, Alex Hou, Rachel Nolander, Wubin Bai, Sung Hun Jin, Zhenqiang Ma, John M. Torkelson, Yonggang Huang*, Wei Ouyang*, Rishi K. Arora*, Igor R. Efimov* and John A. Rogers*
Nature 2025, 640, 77-86.
[2024]
[42] Low-Power Charge Trap Flash Memory with MoS2 Channel for High-Density In-Memory Computing
Youngkwon Kim†, Sangyong Park†, Junhwan Choi, Hamin Park* and Byung Chul Jang*
Advanced Functional Materials 2024, 34, 2405670.
[41] Polymer Dielectric-Based Emerging Devices: Advancements in Memory, Field-Effect Transistor, and Nanogenerator Technologies
Wangmyung Choi†, Junhwan Choi†, Yongbin Han, Hocheon Yoo* and Hong-Joon Yoon*
Micromachines 2024, 15, 1115.
[40] Exploring New Logic Devices: Unlocking Potential with Floating-Gate Transistor
Chungryeol Lee†, Junhwan Choi†, Changhyeon Lee, Hocheon Yoo* and Sung Gap Im*
Applied Physics Reviews 2024, 11, 031317.
<JCR < 10%, Impact factor = 11.9>
[39] Ultrathin, Solvent-Resistant Dielectric for Monolithic Fabrication of Low-Power, Intrinsically Stretchable Active-Matrix Electronic Skin
Juyeon Kang†, Jiyong Yoon†, Bohyun Lee, Hyunjin Jung, Juchan Kim, Wangwoo Nam, Kihoon Jeong, Junhwan Choi*, Donghee Son* and Sung Gap Im*
Device (Cell Press) 2024, 2, 100426.
[38] Realistic Chest X-ray Image Synthesis via Generative Network with Stochastic Memristor Array for Machine Learning-based Medical Diagnosis
Namju Kim†, Jungyeop Oh†, Sungkyu Kim†, Jun-Hwe Cha, Junhwan Choi, Sung Gap Im, Sung-Yool Choi* and Byung Chul Jang*
Advanced Functional Materials 2024, 34, 2305136 (Inside back cover).
[37] Highly Parallel and Ultra-Low-Power Probabilistic Reasoning with Programmable Gaussian-like Memory Transistors
Changhyeon Lee†, Leila Rahimifard†, Junhwan Choi†, Jeong-ik Park, Chungryeol Lee, Divake Kumar, Priyesh Shukla, Seung Min Lee, Amit Ranjan Trivedi*, Hocheon Yoo* and Sung Gap Im*
Nature Communications 2024, 15, 2439.
<JCR < 10%, Impact factor = 14.7>
[36] Soft, full Weatstone bridge 3D pressure sensors for cardiovascular monitoring
Yoonseok Park†, Haiwen Luan†, Kyeongha Kwon†, Ted S. Chung, Seyong Oh, Jae-Young Yoo, Gooyoon Chung, Junha Kim, Suhyeon Kim, Sung Soo Kwak, Junhwan Choi, Hoang-Phuong Phan, Seonggwang Yoo, Hyoyoung Jeong, Jaeho Shin, Sang Min Won, Hong-Joon Yoon, Yei Hwan Jung and John A. Rogers*
npj Flexible Electronics 2024, 8, 6.
[2023]
[35] The Effect of Alkyl Chain Length in Organic Semiconductors and Surface Polarity of Polymer Dielectrics in Organic Thin-Film Transistors (OTFTs)
Junhwan Choi†, Min Ju Kim†, Joo-Young Kim†, Eun Kyung Lee, Changhyeon Lee, Youngkeun Park, Juyeon Kang, Jeong-Il Park*, Byung Jin Cho* and Sung Gap Im*
Small Methods 2023, 7, 2300628 (Front Cover)
<JCR ~ 10%, Impact factor = 10.7>
[34] A Reconfigurable Binary/Ternary Logic Conversion-in-Memory Based on Drain-Aligned Floating-Gate Heterojunction Transistors
Chungryeol Lee, Changhyeon Lee, Seung Min Lee, Junhwan Choi, Hocheon Yoo* and Sung Gap Im*
Nature Communications 2023, 14, 3757
[33] Combination of Polymer Gate Dielectric and Two-Dimensional Semiconductor for Emerging Field-Effect Transistors
Junhwan Choi* and Hocheon Yoo*
Polymers 2023, 15, 1395
[32] Self-Powered, Light-Controlled, Bioresorbable Platforms for Programmed Drug Delivery
Yamin Zhang, Fei Liu, Yuhe Zhang, Jin Wang, Dominic D’Andrea, Jordan B. Walters, Shupeng Lie , Hong-Joon Yoon, Mingzheng Wu, Shuo Li, Ziying Hu, Tong Wang, Junhwan Choi, Keith Bailey, Elizabeth Dempsey, Kaiyu Zhao, Anastasia Lantsova, Yasmine Bouricha, Ivy Huang, Hexia Guo, Xinchen Ni, Yunyun Wu, Geumbee Lee, Fuchang Jiang, Yonggang Huang, Colin K. Franz* and John A. Rogers*
Proceedings of the National Academy of Sciences 2023, 120, e2217734120
[31] A Vacuum-Deposited Polymer Dielectric for Wafer-Scale Stretchable Electronics
Ja Hoon Koo†, Juyeon Kang†, Sungjun Lee†, Jun-Kyul Song, Junhwan Choi, Juyong Yoon, Hong Jun Park, Sung-Hyuk Sunwoo, Dong Chan Kim, Wangwoo Nam, Dae-Hyeong Kim*, Sung Gap Im* and Donghee Son*
Nature Electronics 2023, 6, 137-145
[30] Electrical Interrogation of Thickness-Dependent Multiferroic Phase Transitions in the 2D Antiferromagnetic Semiconductor NiI2
Dmitry Lebedev†, J. Tyler Gish†, Ethan S. Garvey, Teodor K. Stanev, Junhwan Choi, Leonidas Georgopoulos, Thomas W. Song, Hong Youl Park, Kenji Watanabe, Takashi Taniguchi, Nathaniel P. Stern, Vinod K. Sangwan and Mark C. Hersam*
Advanced Functional Materials 2023, 33, 2212568
[2022]
[29] Biodegradable, Three-Dimensional Colorimetric Fliers for Environmental Monitoring
Hong-Joon Yoon†, Geumbee Lee†, Jin-Tae Kim†, Jae-Young Yoo†, Haiwen Luan†, Shyuan Cheng, Soohyeon Kang, Huong Le Thien Huynh, Hyeonsu Kim, Jaehong Park, Joohee Kim, Sung Soo Kwak, Hanjun Ryu, Jihye Kim, Yeon Sik Choi, Hak-Young Ahn, Junhwan Choi, Seyong Oh, Yei Hwan Jung, Minsu Park, Wubin Bai, Yonggang Huang, Leonardo P. Chamorro*, Yoonseok Park* and John A. Rogers*
Science Advances 2022, 8, eade3201
[28] Vertically Integrated Electronics: New Opportunities from Emerging Materials and Devices
Seongjae Kim†, Juhyung Seo†, Junhwan Choi* and Hocheon Yoo*
Nano-Micro Letters 2022, 14, 201
<JCR < 5%, Impact factor = 26.6>
[27] High-Speed, Scanned Laser Structuring of Multi-Layered Eco/Bioresorbable Materials for Advanced Electronic Systems
Quansan Yang†, Ziying Hu†, Min-Ho Seo, Yameng Xu, Ying Yan, Yen-Hao Hsu, Jaime Berkovich, Kwonjae Lee, Tzu-Li Liu, Samantha McDonald, Haolin Nie, Hannah Oh, Mingzheng Wu, Jin-Tae Kim, Stephen A. Miller, Ying Jia, Serkan Butun, Wubin Bai, Hexia Guo, Junhwan Choi, Anthony Banks, Wilson Z. Ray, Yevgenia Kozorovitskiy, Matthew L. Becker, Mitchell A. Pet, Matthew R. MacEwan, Jan-Kai Chang, Heling Wang*, Yonggang Huang* and John A. Rogers*
Nature Communications 2022, 13, 6518
[26] Memristor‐Based Security Primitives Robust to Malicious Attacks for Highly Secure Neuromorphic Systems
Jungyeop Oh†, Sungkyu Kim†, Junhwan Choi, Jun-Hwe Cha, Sung Gap Im, Byung Chul Jang* and Sung-Yool Choi*
Advanced Intelligent Systems 2022, 4, 2200177
[25] A Sub‐20 nm Organic/Inorganic Hybrid Dielectric for Ultralow‐Power Organic Thin‐Film Transistor (OTFT) With Enhanced Operational Stability
Junhwan Choi†, Chungryeol Lee†, Juyeon Kang, Changhyeon Lee, Seung Min Lee, Jungyeop Oh, Sung‐Yool Choi and Sung Gap Im*
Small 2022, 18, 2203165
<JCR < 10%, Impact factor = 13.3>
[24] Vertically Stacked, Low-Voltage Organic Ternary Logic Circuits Including Nonvolatile Floating-Gate Memory Transistors
Junhwan Choi†, Changhyeon Lee†, Chungryeol Lee, Hongkeun Park, Seung Min Lee, Chang-Hyun Kim, Hocheon Yoo* and Sung Gap Im*
Nature Communications 2022, 13, 2305
<JCR < 10%, Impact factor = 16.6>
[23] Functional Polymeric Passivation-Led Improvement of Bias Stress with Long-Term Durability of Edge-Rich Nanoporous MoS2 Thin-Film Transistors
Heekyeong Park†, Junhwan Choi†, Junoh Shim, Seung Min Lee, Sungmin On, Hyung Joong Yun, Sunkook Kim*, Sung Gap Im* and Hocheon Yoo*
npj 2D Materials and Applications 2022, 6, 21
[2021]
[22] Systematic Control of Negative Transconductance in Organic Heterojunction Transistor for High‐Performance, Low‐Power Flexible Ternary Logic Circuits
Chungryeol Lee†, Junhwan Choi†, Hongkeun Park, Changhyeon Lee, Chang‐Hyun Kim, Hocheon Yoo* and Sung Gap Im*
Small 2021, 17, 2103365
<JCR < 10%, Impact factor = 15.153>
[21] Highly Reliable Charge Trap-Type Organic Non-Volatile Memory Device Using Advanced Band-Engineered Organic-Inorganic Hybrid Dielectric Stacks
Min Ju Kim, Changhyeon Lee, Eui Joong Shin, Tae In Lee, Seongho Kim, Jaejoong Jeong, Junhwan Choi, Wan Sik Hwang, Sung Gap Im and Byung Jin Cho*
Advanced Functional Materials 2021, 31, 2103291
[2020]
[20] Long‐Term Retention of Low‐Power, Nonvolatile Organic Transistor Memory Based on Ultrathin, Trilayered Dielectric Containing Charge Trapping Functionality
Changhyeon Lee†, Kwanyong Pak†, Junhwan Choi, Min Ju Kim, Byung Jin Cho and Sung Gap Im*
Advanced Functional Materials 2020, 30, 2004665
[19] Heavily Crosslinked, High‐k Ultrathin Polymer Dielectrics for Flexible, Low‐Power Organic Thin‐Film Transistors (OTFTs)
Junhwan Choi, Juyeon Kang, Changhyeon Lee, Kihoon Jeong and Sung Gap Im*
Advanced Electronic Materials 2020, 6, 2000314
[18] High‐Fidelity, Sub‐5 nm Patterns from High‐χ Block Copolymer Films with Vapor‐Deposited Ultrathin, Cross‐Linked Surface‐Modification Layers
Hyun Suk Wang†, Seula Oh†, Junhwan Choi, Wontae Jang, Ki Hyun Kim, Carlos Luis Arellano, June Huh, Joona Bang* and Sung Gap Im*
Macromolecular Rapid Communications 2020, 41, 1900514
[2019]
[17] Ultrathin ZrOx-Organic Hybrid Dielectric (EOT 3.2 nm) via Initiated Chemical Vapor Deposition for High-Performance Flexible Electronics
Min Ju Kim†, Kwanyong Pak†, Junhwan Choi, Tae In Lee, Wan Sik Hwang, Sung Gap Im* and Byung Jin Cho*
ACS Applied Materials & Interfaces 2019, 11, 44513-44520
[16] Conformal 3D Nanopatterning by Block Copolymer Lithography with Vapor-Phase Deposited Neutral Adlayer
Geon Gug Yang†, Junhwan Choi†, Seung Keun Cha, Gil Yong Lee, Hyeong Min Jin, Ho Seong Hwang, Taeyeong Yun, Juyeon Kang, Kyu Hyo Han, Jang Hwan Kim, Hee Jae Choi, Sung Gap Im* and Sang Ouk Kim*
ACS Nano 2019, 13, 13092-13099
<JCR < 10%, Impact factor = 14.588>
[15] Spontaneous Generation of a Molecular Thin Hydrophobic Skin Layer on a Sub-20 nm, High-k Polymer Dielectric for Extremely Stable Organic Thin-Film Transistor Operation
Junhwan Choi, Jongsun Yoon, Min Ju Kim, Kwanyong Pak, Changhyeon Lee, Haechang Lee, Kihoon Jeong, Kyuwook Ihm, Seunghyup Yoo, Byung Jin Cho, Hyomin Lee and Sung Gap Im*
ACS Applied Materials & Interfaces 2019, 11, 29113-29123
[14] Large-Scale, Low-Power Nonvolatile Memory Based on Few-Layer MoS2 and Ultrathin Polymer Dielectrics
Sang Cheol Yang†, Junhwan Choi†, Byung Chul Jang, Woonggi Hong, Gi Woong Shim, Sang Yoon Yang, Sung Gap Im* and Sung‐Yool Choi*
Advanced Electronic Materials 2019, 5, 1800688
[13] Low-Power, Flexible Nonvolatile Organic Transistor Memory Based on an Ultrathin Bilayer Dielectric Stack
Kwanyong Pak, Junhwan Choi, Changhyeon Lee and Sung Gap Im*
Advanced Electronic Materials 2019, 5, 1800799
[12] Polymer Analog Memristive Synapse with Atomic-Scale Conductive Filament for Flexible Neuromorphic Computing System
Byung Chul Jang†, Sungkyu Kim†, Sang Yoon Yang†, Jihun Park, Jun-Hwe Cha, Jungyeop Oh, Junhwan Choi, Sung Gap Im, Vinayak P. Dravid and Sung-Yool Choi*
Nano Letters 2019, 19, 839-849
[~ 2018]
[11] Initiated Chemical Vapor Deposition: A Versatile Tool for Various Device Applications
Seung Jung Yu†, Kwanyong Pak†, Moo Jin Kwak†, Munkyu Joo, Bong Jun Kim, Myung Seok Oh, Jieung Baek, Hongkeun Park, Goro Choi, Do Heung Kim, Junhwan Choi, Yunho Choi, Jihye Shin, Heeyeon Moon, Eunjung Lee* and Sung Gap Im*
Advanced Engineering Materials 2018, 20, 1700622
[10] Memristive Logic‐in‐Memory Integrated Circuits for Energy‐Efficient Flexible Electronics
Byung Chul Jang†, Yunyong Nam†, Beom Jun Koo, Junhwan Choi, Sung Gap Im, Sang‐Hee Ko Park*, Sung‐Yool Choi*
Advanced Functional Materials 2018, 28, 1704725 (Front Cover)
[9] Low‐Power Nonvolatile Charge Storage Memory Based on MoS2 and an Ultrathin Polymer Tunneling Dielectric
Myung Hun Woo, Byung Chul Jang, Junhwan Choi, Khang June Lee, Gwang Hyuk Shin, Hyejeong Seong, Sung Gap Im and Sung‐Yool Choi*
Advanced Functional Materials 2017, 27, 1703545 (Front Cover)
[8] Zero-Static-Power Nonvolatile Logic-in-Memory Circuits for Flexible Electronics
Byung Chul Jang, Sang Yoon Yang, Hyejeong Seong, Sung Kyu Kim, Junhwan Choi, Sung Gap Im and Sung-Yool Choi*
Nano Research 2017, 10, 2459-2470
[7] Flexible, Low-Power Thin-Film Transistors Made of Vapor-Phase Synthesized High-k, Ultrathin Polymer Gate Dielectrics
Junhwan Choi, Munkyu Joo, Hyejeong Seong, Kwanyong Pak, Hongkeun Park, Chan Woo Park and Sung Gap Im*
ACS Applied Materials & Interfaces 2017, 9, 20808-20817
[6] Vapor-Phase Synthesis of Sub-15 nm Hybrid Gate Dielectrics for Organic Thin Film Transistors
Hyejeong Seong, Junhwan Choi, Bong Jun Kim, Hongkeun Park and Sung Gap Im*
Journal of Materials Chemistry C 2017, 5, 4463-4470
[5] Synthesis of Ultrathin, Homogeneous Copolymer Dielectrics to Control the Threshold Voltage of Organic Thin‐Film Transistors
Kwanyong Pak, Hyejeong Seong, Junhwan Choi, Wan Sik Hwang and Sung Gap Im*
Advanced Functional Materials 2016, 26, 6574-6582 (Back Cover)
[4] Flexible Nonvolatile Polymer Memory Array on Plastic Substrate via Initiated Chemical Vapor Deposition
Byung Chul Jang†, Hyejeong Seong†, Sung Kyu Kim, Jong Yun Kim, Beom Jun Koo, Junhwan Choi, Sang Yoon Yang, Sung Gap Im*, Sung-Yool Choi*
ACS Applied Materials & Interfaces 2016, 8, 12951-12958
[3] A Low-Voltage Organic Complementary Inverter with High Operation Stability and Flexibility Using an Ultrathin iCVD Polymer Dielectric and a Hybrid Encapsulation Layer
Hyejeong Seong, Junhwan Choi, Byung Chul Jang, Mincheol Kim, Seunghyup Yoo, Sung-Yool Choi and Sung Gap Im*
Advanced Electronic Materials 2016, 2, 1500385 (Front Cover)
[2] Vapor-Phase Deposition of the Fluorinated Copolymer Gate Insulator for the P-type Organic Thin-Film Transistor
Junhwan Choi, Hyejeong Seong, Kwanyong Pak and Sung Gap Im*
Journal of Information Display 2016, 17, 43-49
[1] Vapor-Phase Deposited Ultrathin Polymer Gate Dielectrics for High-Performance Organic Thin Film Transistors
Hyejeong Seong, Kwanyong Pak, Munkyu Joo, Junhwan Choi and Sung Gap Im*
Advanced Electronic Materials 2016, 2, 1500209