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  1. Article

    Open Access

    Publisher Correction: Electrospun PVDF/aromatic HBP of 4th gen based flexible and self‑powered TENG for wearable energy harvesting and health monitoring

    Ramadasu Gunasekhar, Mohammad Shamim Reza, Kap ** Kim in Scientific Reports (2024)

  2. Article

    Open Access

    Electrospun PVDF/aromatic HBP of 4th gen based flexible and self-powered TENG for wearable energy harvesting and health monitoring

    In recent times, high-performance wearable electronic devices that can transform mechanical force into electrical energy for biomedical monitoring applications are receiving an increasing amount of attention. ...

    Ramadasu Gunasekhar, Mohammad Shamim Reza, Kap ** Kim in Scientific Reports (2023)

  3. Article

    Open Access

    Flexible unimodal strain sensors for human motion detection and differentiation

    Multiple strain sensors are required to identify individual forces/stresses on human joints and recognize how they work together in order to determine the motion’s direction and trajectory. However, current se...

    Lu **, Zhenhong Li, Zekun Liu, Bethany Richardson, Yan Zheng in npj Flexible Electronics (2022)

  4. No Access

    Article

    Polysomnographic Observation Using Triboelectric Pressure Sensor Composed of Polymer-Pairs Having Coarse Surface

    In this research, the triboelectric sensors are fabricated using a facile stacking of nonwoven thermoplastic polyurethane (TPUnw) and as-spun thermoplastic polyurethane nanofiber web (TPUnf) with nonwoven polypro...

    Mir Muhammad Fahad, Mohammad Shamim Reza, Gajula Prasad in Fibers and Polymers (2022)

  5. No Access

    Article

    Novel Hybrid Pressure Sensor Based on Electrospun Spandex-Polyvinylidene Fluoride Composite Nanofiber Webs

    In this study, the mixture solution of Spandex and polyvinylidene fluoride (PVDF) was electrospun under controlled compositions to obtain Spandex-PVDF hybrid nanofiber webs. Their physico-mechanical and piezo-...

    Mohammad Shamim Reza, Kap ** Kim, Hongdoo Kim in Fibers and Polymers (2020)

  6. No Access

    Article

    Lifetime Prediction of High Tenacity Polyester Yarns for Hydrolytic Degradation Used for Soil Reinforcement

    The long-term strength is considered the various degradation mechanisms in the design of the reinforced soil structure so that ISO TR 20432 provides guidelines for the determination of the long-term strength o...

    Hang-Won Cho, Hyun-** Koo, Hongdoo Kim, Kap-** Kim in Fibers and Polymers (2020)

  7. No Access

    Article

    Electrospun Spandex Nanofiber Webs with Ionic Liquid for Highly Sensitive, Low Hysteresis Piezocapacitive Sensor

    Electrospun Spandex nanofiber webs having very high amount of nano-sized open cell can be used as a piezocapacitive sensor for monitoring both static and dynamic pressures due to excellent electrospinnability ...

    Mohammad Shamim Reza, Kevin Ray Ayag, Mi Kyong Yoo, Kap ** Kim in Fibers and Polymers (2019)

  8. No Access

    Article

    Uniaxially drawn polylactic acid film based physiological sensor for monitoring slee** parameters

    In this study, we investigated the effect of cutting angle, draw ratio (DR), and degree of orientation on the shearpiezoelectric behavior of uniaxially drawn PLA film. Piezoelectric results suggest that the PL...

    Ruthirapathi Tamil Selvan, Yu ** Ahn, Kap ** Kim, Hongdoo Kim in Fibers and Polymers (2017)

  9. No Access

    Article

    Zinc Oxide Thin-Film Transistors Fabricated at Low Temperature by Chemical Spray Pyrolysis

    We report the electrical behavior of undoped zinc oxide thin-film transistors (TFTs) fabricated by low-temperature chemical spray pyrolysis. An aerosol system utilizing aerodynamic focusing was used to deposit...

    Yesul Jeong, Christopher Pearson, Yong Uk Lee in Journal of Electronic Materials (2014)

  10. No Access

    Article

    Effects of negative gate-bias stress on the performance of solution-processed zinc-oxide transistors

    We studied the effects of negative gate-bias stress on the electrical characteristics of top-contact zinc-oxide (ZnO) thin-film transistors (TFTs), which were fabricated by spin coating a ZnO solution onto a s...

    Dongwook Kim, Woo-Sub Lee, Hyunji Shin in Journal of the Korean Physical Society (2014)

  11. No Access

    Article

    Synthesis of polymetalloxanes and their properties as gate insulator for organic thin film transistors

    We report here the synthesis and dielectric properties of polymetalloxane dielectric materials for organic field-effect transistor applications. The gate insulators were obtained from polymetalloxanes by conde...

    Yuedan Wang, Kyungmin Lee, Jihong Oh, Sinhee Kim, Minkyu Lee in Macromolecular Research (2013)

  12. No Access

    Article

    Immobilization of polyelectrolyte multilayer on polymer substrate by multicomponent reaction

    Heekyung Lee, Hongdoo Kim in Macromolecular Research (2010)

  13. No Access

    Article

    Chemical fixation of polyelectrolyte multilayers on polymer substrates

    A simple chemical fixation method for the fabrication of layer-by-layer (LbL) polyelectrolyte multilayer (PEM) has been developed to create a large area, highly uniform film for various applications. PEM of we...

    Son Duy Tuong, Heekyung Lee, Hongdoo Kim in Macromolecular Research (2008)

  14. No Access

    Article

    Shear Induced Phase Behavior of Polymer Blends by Small Angle Neutron Scattering

    The phase behavior of polymer blends and solutions can be changed dramatically by a flow field using a variety of flow geometries. Unlike simple binary fluids which require extremely high shear rates to produc...

    Alan I. Nakatani, Hongdoo Kim, Charles C. Han in MRS Online Proceedings Library (1989)