A5100688817- Adhesion, Friction, and Surface Interactions
- Surface Modification and Superhydrophobicity
- Advancements in Battery Materials
- Molecular Junctions and Nanostructures
- Nanofabrication and Lithography Techniques
- Glass properties and applications
- Supercapacitor Materials and Fabrication
- nanoparticles nucleation surface interactions
- Electrohydrodynamics and Fluid Dynamics
- Synthesis and properties of polymers
- Metal and Thin Film Mechanics
- Electrospun Nanofibers in Biomedical Applications
- Building materials and conservation
- Advanced Chemical Physics Studies
- Photonic Crystals and Applications
- Advanced Battery Materials and Technologies
- Advanced Battery Technologies Research
- Graphene research and applications
- ZnO doping and properties
- Material Properties and Processing
- Analytical Chemistry and Sensors
- Force Microscopy Techniques and Applications
- Advanced Sensor and Energy Harvesting Materials
- Advanced Cellulose Research Studies
- Recycling and utilization of industrial and municipal waste in materials production
Corning (South Korea)
2014-2023
Seoul National University
2006-2023
Samsung (South Korea)
2019
University of Colorado Boulder
2019
Pennsylvania State University
2019
Corning (United States)
2017-2019
Korea University
2012-2016
Pusan National University
2009-2011
Kookmin University
2009
Korea Advanced Institute of Science and Technology
2007-2008
A simple method for fabricating micro/nanoscale hierarchical structures is presented using a two-step temperature-directed capillary molding technique. This lithographic involves sequential application of the process in which uniform polymer-coated surface molded with patterned mold by means force above glass transition temperature polymer. Various microstructures and nanostructures were fabricated minimum resolution down to ∼50 nm good reproducibility. Also contact angle measurements water...
Understanding the interaction between polyimide and inorganic surfaces is vital in controlling interfacial adhesion behavior. Here, molecular dynamics simulations are employed to study of on both crystalline glassy silica surfaces, effects hydroxylation, structure, chemistry investigated. The results reveal that monomers have stronger hydroxylated compared nonhydroxylated surfaces. Also, onto glass corresponding Finally, we explore origins understand why some like Kapton a per unit area...
Paper is a popular platform material in all areas of sensor research due to its porosity, large surface area, and biodegradability, name but few. Many paper-based nanocomposites have been reported the last decade as novel substrates for surface-enhanced Raman spectroscopy (SERS). However, there are still limiting factors, like low density hot spots or loss wettability. Herein, we designed process fabricate silver-chitosan nanocomposite layer on paper celluloses by layer-by-layer method...
Abstract This manuscript provides a comprehensive study of adhesion behavior and its governing mechanisms when polyimide undergoes various modes detachment from silica glass. Within the framework steered molecular dynamics, we develop three different measurement techniques: pulling, peeling, sliding. Such computational methodologies can be applied to investigate heterogeneous materials with differing interfacial modes. Here, novel hybrid potential involving combination INTERFACE force field...
The effect of nanoscale roughness on the adhesion between glassy silica and polyimides is examined by molecular dynamics simulation. Different surfaces, with varying degrees roughness, were generated cleaving bulk structures a predefined surface desired average different periods hydroxylation densities in an effort to study influence these characteristics at silica–polyimide interface. calculated results reveal that Ra primary controlling factor within considered conditions. Further, energy...
The coalescence between 135-Ag and 16-Pd clusters was studied through constant temperature molecular dynamic (MD) simulations at 300 K. Initially, the surface energy reduction dominant. Later, some of Pd atoms penetrated into cluster induced a further decrease. Surface were rearranged to local five-folded icosahedron structure (Ihp). gradually but did not segregate core. As result, core-shell observed, which could be explained by strong mixing nature Ag low kinetic energy.
Understanding the interface between organic and inorganic materials presents many challenges due to complex chemistries involved. Modeling experimental work have elucidated only a few facets of physical chemical nature adhesion such surfaces. In this work, we use density functional theory understand five different crystal surfaces (two-dimensional silica, both sides kaolinite, hydroxylated quartz, albite) with molecules (benzene, phenol, phthalimide, N-phenylmaleimide, diphenyl ether)....
Abstract Glasses with high antimicrobial efficacy were developed in the Fe 2 O 3 -CuO-P 5 ternary system to mitigate fomite-mediated transmission of infectious diseases high-risk settings such as hospitals, daycares, and nursing homes. Binary CuO-P glasses not durable enough for use touch point articles, so was added compositions increase chemical durability. The amount Cu leachate decreased by at least orders magnitude when increased from 0 13.1 mol%. At highest contents corresponding...
A new method for sorting loaded microstructures using a platform known as active rail is presented. Active actively sorts grooved hydrogel at channel branch sites through pneumatic activation of flexible rail. This paper provides mechanism that capable continuous flow reconfigurable multibranch guidance, and it demonstrates stacking combinatorial multicompartment chemical delivery. Detailed facts importance to specialist readers are published ”Supporting Information”. Such documents...
Quaternary ammoniums are cations having widespread use in organic electrolytes for high performance electrochemical double layer capacitors (EDLCs) due to their various advantages such as stability and inexpensive production cost. However, the decomposition of quaternary via Hofmann elimination hinders applications EDLCs operating at elevated temperatures. This study systematically investigates reactivity four different (tetraethyl-, triethylmethyl-, diethyldimethyl-,...
Abstract The electrospinning technique has attracted significant research attention because of its various potential applications and simplicity manufacturing fibers diameter from several micrometers to nanometer range. However, the methods for controlling shape, structure, uniformity electrospun have not yet been fully investigated. In this instabilities, such as cyclical fluctuation multi-jet ejections, which are closely related corresponding nanofiber deposition, were investigated polymer...
Development of a novel polymeric binder material is necessary for improving the electrochemical performance silicon-based anodes Li-ion batteries, suffering from irreversible capacity loss due to their huge volume change during cycling. However, relevant mechanisms on how adhesion and mechanical properties are correlated stability Si anode still lacking. In this study, we investigate role functional groups attached in structural LixSiO2 using molecular dynamics simulations. A pulling test...
Electrospinning is recognized as a simple and easy method to produce fibers with nanoscale diameters. However, the methods for controlling shape, structure, uniformity of electrospun have not yet been fully investigated. In this research, electrospinning jet behavior, corresponding nanofiber deposition, average fiber diameter are examined various nozzle Fluctuations in sequence drop growing, electrospinning, and/or termination analyzed. We propose two different fluctuations according...
In this work, we use realistic silicate glass surface models, with molecular dynamics simulations, and present an algorithm for proper atomic partial charge assignment, consistent measurable internal dipoles. The immersion energy is calculated different compositions in solutions of varying pH. We to elucidate the differences structure water between mono- divalent cations. found increase ionic density This can be attributed stronger interaction cations, as opposed interactions silanol groups....
Abstract This article has been retracted due to dual submission and publication.
The adhesion behavior of perfluoropolyether (PFPE) on rough silica surfaces is investigated by steered molecular dynamics simulations. To reproduce bond breakage during sliding PFPE, a dynamic breaking method developed and applied to the PFPE–silica interface. Calculated results reveal that nanoscale roughness critical parameter affects strength due PFPE film thickness 1 nm, also depends density surface. effect amplitude, spacing, weight are individually analyzed find key for enhancement....