A5040320137- Photonic Crystals and Applications
- Advancements in Battery Materials
- Advanced Battery Materials and Technologies
- Photonic and Optical Devices
- Supercapacitor Materials and Fabrication
- Advanced Battery Technologies Research
- Optical Coatings and Gratings
- Advanced Sensor and Energy Harvesting Materials
- Thermal properties of materials
- Plasmonic and Surface Plasmon Research
- Nonlinear Optical Materials Studies
- Conducting polymers and applications
- Mesoporous Materials and Catalysis
- Electron and X-Ray Spectroscopy Techniques
- Polymer composites and self-healing
- Thermal Radiation and Cooling Technologies
- Nanofabrication and Lithography Techniques
- Advanced Materials and Mechanics
- Gold and Silver Nanoparticles Synthesis and Applications
- Metamaterials and Metasurfaces Applications
- Polymer Surface Interaction Studies
- Silicon Nanostructures and Photoluminescence
- Quantum Dots Synthesis And Properties
- Pickering emulsions and particle stabilization
- Advanced battery technologies research
University of Illinois Urbana-Champaign
2016-2025
Division of Materials Research
2018-2025
Materials Science & Engineering
2009-2025
Goodwin College
2010-2024
University of Illinois System
2003-2024
Battery Park
2017-2022
Institute for Advanced Study
2018-2021
Urbana University
1999-2021
Korea Institute of Science and Technology
2021
Northwestern University
2021
A diverse spectrum of technology drivers such as improved thermal barriers, higher efficiency thermoelectric energy conversion, phase-change memory, heat-assisted magnetic recording, management nanoscale electronics, and nanoparticles for medical therapies are motivating studies the applied physics transport at nanoscale. This review emphasizes developments in experiment, theory, computation past ten years summarizes present status field. Interfaces become increasingly important on small...
Pulickel M. Ajayan, et al., (eds.).John Wiley & Sons (2003), 238 pp. ISBN: 3-527-30359-6 $135 / $105 €157.50
Self-healing coatings that autonomically repair and prevent corrosion of the underlying substrate are created through dispersion microencapsulated healing agents in a polymer film. Following damage event, these released into damaged region, passivating substrate. This approach to self-healing is quite general, effective for both model industrially important coating systems.
The synthesis, swelling kinetics, and optical diffraction of inverse opal hydrogel sensors (see Figure) are demonstrated. Colloidal crystal templating is used to prepare methacrylate/acrylic acid (AA) copolymers that have an interconnected pore structure, allowing facile diffusion a relatively rapid response. system shows good mechanical stability pH‐dependent shifts in regulated by the AA concentration.
Polydimethylsiloxane-based self-healing is achieved through the tin-catalyzed polycondensation of phase-separated droplets. The catalyst released into crack plane when microcapsules containing a tin compound are ruptured by advancing (see figure). This system greatly extends capability polymers introducing new, stable healing chemistry structural polymer matrix and may provide route to in harsh corrosive environments.
Using time-domain thermoreflectance, we have measured the transport of thermally excited vibrational energy across planar interfaces between water and solids that been chemically functionalized with a self-assembled monolayer (SAM). The Kapitza length--i.e., thermal conductivity divided by conductance per unit area interface--is analogous to "slip length" for flowing tangentially past solid surface. We find length at hydrophobic (10-12 nm) is factor 2-3 larger than hydrophilic (3-6 nm). If...
We use substrates chemically micropatterned with anionic and cationic regions to govern the deposition of charged colloidal particles. The direct observation assembly suggests that this process includes two steps: an initial patterned attachment colloids substrate additional ordering structure upon drying. driving forces process, i.e. , screened electrostatic lateral capillary interactions, are discussed. This approach makes it possible fabricate complex, high-resolution two-dimensional arrays
EN-MILD approach for Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub> MXene synthesis with an ultrahigh electrical conductivity of about 2.4 × 10<sup>4</sup> S cm<sup>−1</sup>.
Abstract Lithium metal anodes hold great promise to enable high-energy battery systems. However, lithium dendrites at the interface between anode and separator pose risks of short circuits fire, impeding safe application. In contrast conventional approaches suppressing dendrites, here we show a deposition-regulating strategy by electrically passivating top porous nickel scaffold chemically activating bottom form conductivity/lithiophilicity gradients, whereby is guided deposit preferentially...
We describe an optical beam deflection technique for measurements of the thermal diffusivity fluid mixtures and suspensions nanoparticles with a precision better than 1%. Our approach is tested using conductivity ethanol-water mixtures; in nearly pure ethanol, increase water concentration factor 2 larger predicted by effective medium theory. Solutions C60–C70 fullerenes toluene alkanethiolate-protected Au were measured to maximum volume fractions 0.6% 0.35vol%, respectively. do not observe...
We manufacture large-area plasmonic structures featuring 3-dimensional chirality by colloidal nanohole lithography. By varying the polar rotating speed of samples during gold evaporation, we can fabricate spiral-type ramp nanostructures. The optical properties show chiroptical resonances in 100 to 400 THz frequency region (750 3000 nm), with circular dichroism values up 13%. Our method offers a simple low-cost manufacturing cm(2)-sized chiral templates for applications such as stereochemical...
We present a method to enhance the sensing properties of localized plasmon sensor. The concept is based on combination plasmons in nanostructures and photonic microcavity. Metal nanorods that are placed at Bragg distance above metal mirror form Fabry–Pérot microcavity constitute coupled photonic-plasmonic system. resonances phase shifts upon excitation extremely sensitive changes refractive index material surrounding nanorods. Compared plasmonic alone, system allows for much more detection...
Silicon-based lithium ion battery anodes are attracting significant attention because of silicon's exceptionally high capacity. However, large volume change during cycling generally leads to anode pulverization unless the silicon is dispersed throughout a matrix in nanoparticulate form. Because results loss electric connectivity, reversible capacity most dramatically decays within few cycles. Here we report three-dimensional (3D) bicontinuous formed by depositing layer on surface colloidal...