A5077063203- Advanced Sensor and Energy Harvesting Materials
- biodegradable polymer synthesis and properties
- Hydrogels: synthesis, properties, applications
- Polymer composites and self-healing
- ZnO doping and properties
- Advanced Materials and Mechanics
- Nanoplatforms for cancer theranostics
- Conducting polymers and applications
- Electrospun Nanofibers in Biomedical Applications
- Natural Fiber Reinforced Composites
- Dielectric materials and actuators
- Photodynamic Therapy Research Studies
- Graphene research and applications
- Advanced Polymer Synthesis and Characterization
- Fiber-reinforced polymer composites
- Vibration Control and Rheological Fluids
- Plasmonic and Surface Plasmon Research
- Polydiacetylene-based materials and applications
- Gold and Silver Nanoparticles Synthesis and Applications
- Pickering emulsions and particle stabilization
- GaN-based semiconductor devices and materials
- Cancer Immunotherapy and Biomarkers
- Multiferroics and related materials
- Immunotherapy and Immune Responses
- Porphyrin and Phthalocyanine Chemistry
Purdue University West Lafayette
2021-2023
Korea Research Institute of Chemical Technology
2017-2020
Ulsan National Institute of Science and Technology
2016-2017
Chungnam National University
2017
The most important properties of self-healing polymers are efficient recovery at room temperature and prolonged durability. However, these two characteristics contradictory, making it difficult to optimize them simultaneously. Herein, a transparent easily processable thermoplastic polyurethane (TPU) with the highest reported tensile strength toughness (6.8 MPa 26.9 MJ m-3 , respectively) is prepared. This TPU superior contemporary room-temperature self-healable materials conveniently heals...
Triboelectric charging involves frictional contact of two different materials, and their electrification usually relies on polarity difference in the triboelectric series. This limits choices materials for pairs, hindering research development energy harvest devices utilizing effect. A progressive approach to resolve this issue modification chemical structures effectively engineering properties. Here, we describe a facile method change property polymeric surface via atomic-level...
Abstract Integrated electronic circuitries with pressure sensors have been extensively researched as a key component for emerging electronics applications such skins and health-monitoring devices. Although existing display high sensitivities, they can only be used specific purposes due to the narrow range of detectable (under tens kPa) difficulty forming highly integrated arrays. However, it is essential develop tactile wide in order use them diverse application areas including medical...
Environmental and health concerns force the search for sustainable super engineering plastics (SEPs) that utilise bio-derived cyclic monomers, e.g. isosorbide instead of restricted petrochemicals. However, previously reported thermosets or thermoplastics rarely offer thermal/mechanical properties, scalability, recycling match those petrochemical SEPs. Here we use a phase transfer catalyst to synthesise an isosorbide-based polymer with high molecular weight >100 kg mol-1, which is...
Here we demonstrate fully-integrated, bezel-less transistor arrays using stretchable origami substrates and foldable conducting interconnects. Reversible folding of these is enabled by which are composed rigid support fixtures elastic joints. In addition, hybrid structures thin metal films metallic nanowires worked as interconnects located on the elastomeric
Aramid nanofibers (ANFs), typically produced by exfoliating aramid microfibers (Kevlar) in alkaline media, exhibit excellent mechanical properties and have therefore attracted increased attention as nanoscale building blocks. However, the preparation of involves laborious hazardous processes, which limits industrial-scale use ANFs. This work describes a facile direct monomer-to-ANF synthesis via an as-synthesized intermediate low-molecular-weight poly(p-phenylene terephthalamide) (PPTA)...
Inspired by the human skin, a wholly self-healing electronic-skin (e-skin) is designed monolithic combination of dermis-like hydrogel for conductivity and an epidermis-like thermoplastic polyurethane (TPU) elastomer protection. The hydrogen-bond-mediated "heteroself-healing" through simple assembly this hydrogel-elastomer hybrid forms seamless interface with strong adhesion. A low degree microphase-separated TPU promotes heteroswapping hydrogen bonds at interface. e-skin recovers all...
In article number 1705145, Sung Yeon Hwang, Dongyeop X. Oh, Jeyoung Park, and co-workers fabricate remarkably tough room-temperature self-healable thermoplastic polyurethane elastomers. Hard segments with an asymmetric alicyclic structure provide the optimal metathesis efficiency for embedded aromatic disulfide while preserving remarkable mechanical properties. The toughness value of 26.9 MJ m−3 is twice best a previously reported material.
Abstract Although hydrogels are promising transdermal patches, they face spatiotemporal problems related to controlled drug release. From the “spatio” perspective, not malleable, therefore do fully contact curved skin, such as that found on nose and fingers. “temporal” internal network of a hydrogel retards cargo Herein, malleable rapid‐cargo‐releasing poly(vinyl alcohol)‐borax embeds freely mobile poly(hydroxyethyl methacrylate) (PHEMA) micelles is prepared. The in situ polymerization PHEMA...
Appropriate control of energy band bending at the interface between semiconductors and electrolytes are closely related to performance photoelectrochemical (PEC) water splitting. Dipoles formed near surface induces interface. Energy has been demonstrated by employing charged molecules piezoelectric materials. However, chemical approaches have demerit instability inducement instantaneous dipole, respectively. To overcome these problems, we adopted ferroelectric material for PEC splitting,...
One of the main challenges in widespread utilization localized plasmon resonance-based biosensors is fabrication large-area and low-cost plasmonic nanostructures. In this work, we fabricated complementary such as nanohole nanodisk arrays using dual nanotransfer printing (NTP) with a single metal deposition reusable mold. The suspended were subsequent dry etching process. We confirmed maximum enhancement bulk sensitivity experiments simulations by controlling vertical lateral depths...
Photodynamic therapy (PDT) using 5-aminolevulinic acid (ALA) prodrug is a clinically tried and proven treatment modality for surface-level lesions. However, its use deep-seated tumors has been limited due to the poor penetration depth of visible light needed activate photosensitizer protoporphyrin IX (PPIX), which produced from ALA metabolism. Herein, we report usage poly(ethylene glycol-b-lactic acid) (PEG-PLA)-encapsulated calcium tungstate (CaWO4, CWO short) nanoparticles (PEG-PLA/CWO...
In article number 2000876, Sung Yeon Hwang, Dongyeop X. Oh, Jeyoung Park, and co-workers fabricate a malleable rapid-cargo-releasing poly(vinyl alcohol)-borax hydrogel that embeds freely mobile poly(hydroxyethyl methacrylate) micelles. Upon exposure to wet conditions, the micelle particles escaping from act as “conveyor belt” effectively expel cargo into external environment.