A5074681611- Block Copolymer Self-Assembly
- Liquid Crystal Research Advancements
- Photonic Crystals and Applications
- Advanced Sensor and Energy Harvesting Materials
- Conducting polymers and applications
- Polymer composites and self-healing
- Advanced Materials and Mechanics
- Nanomaterials and Printing Technologies
- Pigment Synthesis and Properties
- Machine Learning in Materials Science
- Slime Mold and Myxomycetes Research
- 2D Materials and Applications
- Quantum Dots Synthesis And Properties
- Organic Electronics and Photovoltaics
- Innovative Microfluidic and Catalytic Techniques Innovation
- Advanced Memory and Neural Computing
- Polydiacetylene-based materials and applications
- Mesoporous Materials and Catalysis
- Fuel Cells and Related Materials
- Thermal properties of materials
- Solar-Powered Water Purification Methods
- Chalcogenide Semiconductor Thin Films
- Photochromic and Fluorescence Chemistry
- Scientific Computing and Data Management
Texas A&M University
2022-2024
Yonsei University
2018-2022
The development of electrically responsive sensors based on the capacitance, voltage, and resistance that can detect simultaneou sly visualize large strain involved with human motion is in great demand. Here, we demonstrate a highly stretchable, capacitive sensor strain-responsive structural color (SC). Our device contains an elastomeric sensing film produces capacitance change under strain, which self-assembled block copolymer (BCP) photonic crystal (PC) 1D periodic in-plane lamellae...
The development of a lightweight, low-power, user-interactive three-dimensional (3D) touchless display in which human stimulus can be detected and simultaneously visualized noncontact mode is great interest. Here, we present 3D sensing based on multiorder reflection structural colors (SCs) thin, solid-state block copolymer (BCP) photonic crystal (PC). Full-visible-range SCs are developed BCP PC consisting alternating lamellae, one contains chemically cross-linked, interpenetrated hydrogel...
Abstract Flexible electronics that enable the visualization of thermal energy have significant potential for various applications, such as diagnosis, sensing and imaging, displays. Thermo‐adaptive flexible electronic devices based on thin 1D block copolymer (BCP) photonic crystal (PC) films with self‐assembled periodic nanostructures are presented. By employing a thermo‐responsive polymer/non‐volatile hygroscopic ionic liquid (IL) blend BCP film, full visible structural colors (SCs)...
Abstract Structural color (SC) arising from a periodically ordered self‐assembled block copolymer (BCP) photonic crystal (PC) is useful for reflective‐mode sensing displays owing to its capability of stimuli‐responsive structure alteration. However, set PC inks, each providing precisely addressable SC in the full visible range, has rarely been demonstrated. Here, strategy developing BCP inks with tunable structures presented. This involves solution‐blending two lamellar‐forming BCPs...
Stimuli-interactive structural color (SC) of a block copolymer (BCP) photonic crystal (PC) uses reversible alteration the PC using external fluids and applied forces. The origin diffusional pathways stimulating fluid into BCP has not been examined. Here, we directly visualize vertically oriented screw dislocations in one-dimensional lamellar that facilitate rapid response visible SC. To reveal pathway solvent via dislocations, lamellae are swollen with an interpenetrated hydrogel network,...
Abstract In spite of efforts to fabricate stimuli‐sensitive structural colors (SCs) self‐assembled block copolymer (BCP) photonic crystals (PCs) with potential applications in displays, media boards, and sensors, few studies have demonstrated BCP PCs suitable for high‐density nonvolatile information storage. Herein, a simple but robust route multilevel recording using PC is presented. The proposed method based on the spatially controlled crosslinking microdomains induced by photothermal...
Block Copolymer Blends In article number 2103697, Cheolmin Park and co-workers develop a palette of block copolymer photonic crystal inks, enabling convenient modulation the structural color in full visible range via solution blending two lamellar-forming copolymers. The binary blend crystals are applicable to various processes offer efficient reflection-mode pattern encryption suitable for emerging vision technology requiring ultra-thin, mechanically flexible, thus skin-patchable performance.
In article number 1904055, Youngjong Kang, Cheolmin Park, and co-workers demonstrate multilevel nonvolatile memory bits by utilizing photothermal control of the structural color a block copolymer photonic crystal deposited on photothermal-conversion layer. With multi-structural recording through laser position, time, power, information is stored visualized with different colors in manner, not simply binary form.
Structural colors (SCs) of photonic crystals (PCs) have attracted much attention due to their broad applications in the field displays, sensors, and media boards. Compared with different PCs, block copolymer (BCP) based PCs has an easy processing route self-assembled microstructure BCP. Here, we demonstrate a non-volatile, multi-level optical information storage BCP SC. Our method is on controlled cross-linking PC's microdomains resulting from photo-thermal conversion. The process writing...
Liquid-phase exfoliation (LPE) of transition metal dichalcogenide (TMD) nanosheets is a facile, cost-effective approach to large-area photoelectric devices including photodetectors and non-volatile memories. Non-destructive using macromolecular dispersing agents advantageous in rendering the TMD nanocomposite films appropriate for mechanically flexible devices. Here, an efficient LPE molybdenum diselenide (MoSe 2 ) with zwitterionic detergents demonstrated, was facilitated through...
In article number 2008548, Seunggun Yu, Cheolmin Park, and co-workers demonstrate thermo-adaptive flexible electronic devices, based on thin self-assembled block copolymer photonic crystal films. The reversible structural color of the thermo-responsive film facilitates development a sensing display as well diagnostic thermal patches, making it step forward in emerging thermotronics suitable for variety human-interactive photo-electronics.