Article
Chemistry, Physical
Pawisa Kanokpaka, Ling-Yu Chang, Bung-Chen Wang, Tsung-Han Huang, Mu-Jie Shih, Wei-Song Hung, Juin-Yih Lai, Kuo-Chuan Ho, Min-Hsin Yeh
Summary: Recent progress in wearable sweat sensors has allowed for the collection of molecular-level insight into the dynamics of human bodies. In this study, a self-powered molecular imprinted polymers-based triboelectric sensor (MIP-TES) was designed for specific and simultaneous lactate detection. The results demonstrated the high selectivity and stability of the sensor, which could directly power LED lights.
Article
Materials Science, Ceramics
Zhenlong Li, JiaJia Yin, Yang Yu, Yuan Ji, Yundan Liu, Xiang Qi
Summary: In this study, an economical and eco-friendly strain and sweat sensor was developed using carbon black and natural flour polymer. The sensor, made of green and biodegradable composites, can measure electrical resistance and strain simultaneously and continuously. The sensor's electric response was also investigated under simulated sweat conditions. The CB-dough sensor showed potential for durable surveillance of human activity and real-time feedback of sweat secretion, offering a simple and cost-effective solution for flexible strain sensors in wearable electronics and bio-sensors.
CERAMICS INTERNATIONAL
(2023)
Article
Nanoscience & Nanotechnology
Myung-Yeon Cho, Ik-Soo Kim, Seok-hun Kim, Chulhwan Park, Nam-Young Kim, Sang-Wook Kim, Sunghoon Kim, Jong-Min Oh
Summary: Respiration monitoring and human sweat sensing have great potential for application in personal healthcare data collection, disease diagnostics, and preventing human-to-human transmission of deadly viruses. A unique sensing system based on a CsPb2Br5/BaTiO3 humidity-sensing layer was introduced, showing optimal performance with a 1.0 μm thick layer due to its ideal microstructure. The sensor offers high electrical signal variation at 0.5 kHz, making it the best device for monitoring sudden changes in respiratory rates and detecting sweat evaporation with ultrasensitive capabilities.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Analytical
Ren Wang, Qingfeng Zhai, Tiance An, Shu Gong, Wenlong Cheng
Summary: In recent years, there has been a growing interest in developing wearable biosensors for non-invasive monitoring of vital signs and chemical/biological markers, with textiles being considered a promising platform due to their breathability, softness, and comfort. Gold is favored as an active sensing material for fabricating lactate biosensors due to its biocompatibility and wide electrochemical window. Dry-spinning method was used to produce stretchable, strain-insensitive and highly conductive gold fibers which could be integrated into textiles for monitoring lactate levels with high sensitivity.
Article
Engineering, Environmental
Seon Gyu Son, Hong Jun Park, Seon-Mi Kim, Seo Jin Kim, Min Sik Kil, Jae-Min Jeong, Youngeun Lee, Youngho Eom, Sung Yeon Hwang, Jeyoung Park, Bong Gill Choi
Summary: A self-healable, robust, and conductive ink is developed by incorporating graphene into a self-healing polymer. The corresponding screen-printed electrode exhibits spontaneous conductivity self-healing and can withstand high tensile strain under ambient conditions. A highly stretchable electrochemical Na+ sensor is fabricated using this ink, which shows excellent sensitivity retention and can monitor sweat during physical exercise. This work opens up possibilities for the commercialization of devices requiring both mechanical resilience and stable electrical performance.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Analytical
Meixue Lai, Lijie Zhong, Siyi Liu, Yitian Tang, Tingting Han, Huali Deng, Yu Bao, Yingming Ma, Wei Wang, Li Niu, Shiyu Gan
Summary: This study presents a method for constructing wearable sweat electrolyte sensors using carbon fiber-based solid-contact ion-selective electrodes (SC-ISEs). By using carbon fibers extracted from commercial cloth as electrode material, the cost and reproducibility issues of flexible SC-ISEs were addressed. The results showed that the carbon fiber-based SC-ISEs exhibited reversible voltammetric and stable impedance performances, and had high reproducibility of standard potentials between normal and bending states.
ANALYTICA CHIMICA ACTA
(2024)
Review
Optics
Rui Min, Xuehao Hu, Luis Pereira, M. Simone Soares, Luis C. B. Silva, Guoqing Wang, Luis Martins, Hang Qu, Paulo Antunes, Carlos Marques, Xiaoli Li
Summary: Polymer optical fibers, with advantages like low Young's modulus, high flexibility, and bio-compatibility, meet the requirements for monitoring human physiological and body functions and are expected to be widely implemented in this research field in the next few years.
OPTICS AND LASER TECHNOLOGY
(2022)
Article
Biophysics
Zhenying Xu, Xiujuan Qiao, Runzhang Tao, Yanxin Li, Shuju Zhao, Yuchen Cai, Xiliang Luo
Summary: In this study, a noninvasive wearable sweat sensing patch was demonstrated, consisting of an electrochemical sensing system and a pilocarpine-based iontophoretic system. The sweat sensor can simultaneously monitor the pH and tyrosine (Tyr) in sweat, and calibrate Tyr detection results with the measured pH value to enhance accuracy. The presence of tannic acid chelated-Ag nanoparticles and carbon nanotubes significantly improved the conductivity and flexibility of the hydrogel, and endowed it with antibacterial capability. The wearable sensor was capable of monitoring Tyr with enhanced accuracy in various sweats.
BIOSENSORS & BIOELECTRONICS
(2023)
Article
Chemistry, Analytical
Ivan Chapalo, Andrei Gusarov, Andreas Ioannou, Andreas Pospori, Karima Chah, Ying-Gang Nan, Kyriacos Kalli, Patrice Megret
Summary: We studied the response of fiber Bragg gratings (FBGs) inscribed in a few-mode polymer optical fiber to gamma radiation. The FBGs exhibited a linear Bragg wavelength shift with the dose, with a mean sensitivity of -3.95 pm/kGy at 43 degrees C. The sensitivity increased to -10.6 pm/kGy at 58 degrees C. After irradiation, the FBGs showed partial recovery, which depended on the received dose. In addition, the reflection power of the FBGs decreased with the dose due to radiation induced attenuation in the CYTOP fiber. The linear response and recovery make CYTOP FBGs suitable for gamma radiation dosimetry, but compensation for the temperature dependence is necessary in practical applications.
Article
Engineering, Environmental
Yutong Shen, Shanshan Chai, Qingling Zhang, Mengdi Zhang, Xue Mao, Liang Wei, Fenglei Zhou, Runjun Sun, Chengkun Liu
Summary: In this study, a fiber-based organic electrochemical transistor (FECT) was developed by incorporating MXene and PEDOT:PSS onto electrospun polyvinyl formal (PVF) nanofiber bundle, showing high sensitivity and selectivity. A wearable real-time monitoring platform was also built to detect lactate concentrations in human sweat.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Analytical
Zhenying Xu, Jingyao Song, Bingrui Liu, Shaoping Lv, Fengxian Gao, Xiliang Luo, Peipei Wang
Summary: The wearable microfluidic-based electrochemical sensor incorporating conducting polymer PEDOT:PSS hydrogel provides an accurate and sensitive detection of uric acid (UA) in human sweat. It shows ultrahigh sensitivity and low limit of detection, allowing real-time monitoring of UA levels in human sweat samples with high correlation to ELISA results.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Materials Science, Multidisciplinary
Sudipta Choudhury, Deepak Deepak, Gourav Bhattacharya, James McLaughlign, Susanta Sinha Roy
Summary: In this study, a modified MoS2-PANI screen-printed carbon electrode (SPCE) is used as a sweat biosensor. The biosensor exhibits high sensitivity, excellent stability, and selectivity. The enhanced performance of the biosensor is attributed to the synergistic effect between MoS2 and PANI.
MACROMOLECULAR MATERIALS AND ENGINEERING
(2023)
Article
Electrochemistry
Jaesik Yoon, Myeongseok Sim, Tae-Sik Oh, Young Soo Yoon, Dong-Joo Kim
Summary: A sensitive and selective sweat sensor based on a flexible NiCu(OOH)/polystyrene (PS) electrode was reported for detecting a urea biomarker. The sensor exhibited excellent linear response and sensitivity, with negligible interferences from co-existing species. Bending tests demonstrated excellent mechanical tolerance, highlighting its potential for biomedical applications.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2021)
Article
Chemistry, Analytical
Dalton L. Glasco, Anjaiah Sheelam, Nguyen H. B. Ho, Jeffrey G. Bell
Summary: Parkinson's disease (PD) is a leading neurological disorder affecting global health. In this study, a low-cost 3D printed sensor combined with a portable potentiostat connected to a smartphone via Bluetooth was used to detect L-Dopa in human sweat for the first time. The optimized sensors were able to simultaneously detect uric acid and L-Dopa with a wide response range, and were unaffected by common physiological interferents. The recovery rate of L-Dopa in human sweat using a smartphone-assisted handheld potentiostat was 100%, confirming the accurate detection ability of this sensor.
ANALYTICA CHIMICA ACTA
(2023)
Article
Mechanics
Wuke Xu, Qi Wu, Hanqi Zhang, Chen Gong, Rong Wang, Jiyun Lu, Ke Xiong
Summary: The study introduced a new fiber Bragg grating-based acoustic emission sensor for intensive investigation of the damage process of a carbon-fiber reinforced plastic T-joint under loading. Experimental findings showed that the sensor effectively detected the acoustic emission signals caused by debonding and were consistent with the finite element simulation results.
COMPOSITE STRUCTURES
(2021)
Article
Materials Science, Multidisciplinary
Seong-Min Kim, Nara Kim, Youngseok Kim, Min-Seo Baik, Minsu Yoo, Dongyoon Kim, Won-June Lee, Dong-Hee Kang, Sohee Kim, Kwanghee Lee, Myung-Han Yoon
NPG ASIA MATERIALS
(2018)
Article
Multidisciplinary Sciences
Seong-Min Kim, Chang-Hyun Kim, Youngseok Kim, Nara Kim, Won-June Lee, Eun-Hak Lee, Dokyun Kim, Sungjun Park, Kwanghee Lee, Jonathan Rivnay, Myung-Han Yoon
NATURE COMMUNICATIONS
(2018)
Article
Engineering, Electrical & Electronic
Ji-Hee Yang, Da-Jeong Yun, Seong-Min Kim, Do-Kyun Kim, Myung-Han Yoon, Gi-Heon Kim, Sung-Min Yoon
SOLID-STATE ELECTRONICS
(2018)
Article
Materials Science, Multidisciplinary
Youngseok Kim, Taekyung Lim, Chi-Hyeong Kim, Chang Su Yeo, Keumyoung Seo, Seong-Min Kim, Jiwoong Kim, Sang Yoon Park, Sanghyun Ju, Myung-Han Yoon
NPG ASIA MATERIALS
(2018)
Article
Nanoscience & Nanotechnology
Anna I. Hofmann, Ida Ostergren, Youngseok Kim, Sven Fauth, Mariavittoria Craighero, Myung-Han Yoon, Anja Lund, Christian Muller
ACS APPLIED MATERIALS & INTERFACES
(2020)
Article
Materials Science, Multidisciplinary
Youngseok Kim, Anja Lund, Hyebin Noh, Anna I. Hofmann, Mariavittoria Craighero, Sozan Darabi, Sepideh Zokaei, Jae Il Park, Myung-Han Yoon, Christian Mueller
MACROMOLECULAR MATERIALS AND ENGINEERING
(2020)
Article
Chemistry, Physical
Ji Hwan Kim, Zubair Ahmad, Youngseok Kim, Wonbin Kim, Hyungju Ahn, Jae-Suk Lee, Myung-Han Yoon
CHEMISTRY OF MATERIALS
(2020)
Review
Biochemistry & Molecular Biology
Ji Hwan Kim, Seong-Min Kim, Gunwoo Kim, Myung-Han Yoon
MACROMOLECULAR BIOSCIENCE
(2020)
Article
Chemistry, Multidisciplinary
Youngseok Kim, Hyebin Noh, Bryan D. Paulsen, Jiwoong Kim, Il-Young Jo, HyungJu Ahn, Jonathan Rivnay, Myung-Han Yoon
Summary: This study reports high-performance microfiber-based organic electrochemical transistors with unprecedentedly large muC*, achieved by using highly ordered crystalline PEDOT:PSS microfibers with very high carrier mobilities. The strain engineering and solvent-mediated crystallization techniques led to the permanent preferential alignment of crystalline PEDOT:PSS domains, resulting in high carrier mobility without compromising volumetric capacitance and hole density. The advantageous electrical and electrochemical characteristics offer a benchmark parameter of mu C* over approximately 1500 F cm(-1) V-1 s(-1), which is the highest metric reported in the literature and can be beneficial for realizing a new class of substrate-free bioelectronics.
ADVANCED MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Bowen Ding, Gunwoo Kim, Youngseok Kim, Flurin D. Eisner, Edgar Gutierrez-Fernandez, Jaime Martin, Myung-Han Yoon, Martin Heeney
Summary: Two new glycolated semiconducting polymers, PgBT(F)2gT and PgBT(F)2gTT, with different backbone curvatures were designed and synthesised for application in p-type accumulation mode organic electrochemical transistors (OECTs). While PgBT(F)2gT achieved a higher volumetric capacitance due to its curved backbone geometry, PgBT(F)2gTT exhibited superior OECT performance overall thanks to its enhanced order, resulting in faster charge mobility.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Multidisciplinary Sciences
Elizabeth Gutierrez-Meza, Ravyn Malatesta, Hongmo Li, Ilaria Bargigia, Ajay Ram Srimath Kandada, David A. Valverde-Chavez, Seong-Min Kim, Hao Li, Natalie Stingelin, Sergei Tretiak, Eric R. Bittner, Carlos Silva-Acuna
Summary: Frenkel excitons play a crucial role in the optical properties of organic semiconductors and are predicted to form bound exciton pairs. By using nonlinear coherent spectroscopy, bound biexcitons were identified in a model polymeric semiconductor, revealing correlations between excitons. Using a Frenkel exciton model, the binding energy of biexcitons was related to molecular parameters, offering insights into the electronic structure of polymeric semiconductors and other excitonic systems.
Article
Nanoscience & Nanotechnology
Dong-Hee Kang, Seyoung Lee, Ji Hwan Kim, Dongyoon Kim, Seong-Min Kim, Jeong-Ah Kim, Myung-Han Yoon
Summary: The study introduces a method based on two-stage nanosphere lithography to fabricate vertical silicon nanocolumn arrays with extremely low density, high aspect ratios, and arbitrary spatial patterns. This approach offers advantages in terms of large-scale manufacturing, flexibility, and reproducibility, making it suitable for various applications including cellular interface experiments.
ACS APPLIED NANO MATERIALS
(2021)