Materials Literature
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A theorem is established to show that nanoscale energy deposition in water by X-rays can be greatly enhanced via the geometry of nanostructures. The calculated results show that enhancement over background water can reach over 60 times for a single nanoshell made of gold. Other geometries and nanostructures are invest…
We study the bound states of a three-dimensional Holstein polaron near various kinds of single impurities, using the momentum-average approximation. We show that the electron-phonon coupling is responsible for a strong renormalization of the impurity potential, resulting in an effective potential with significant reta…
Abstract A seeded surfactant‐free methyl methacrylate emulsion polymerization is employed to prepare core–shell particles with predetermined size and narrow size distribution. The particle size is determined by the ratio between methyl methacrylate (MMA, shell) and polytetrafluoroethylene (PTFE, core). Monodisperse pa…
Optical antennas interface an object with optical radiation and boost the absorption and emission of light by the objects through the antenna modes. It has been much desired to enhance both excitation and emission processes of the quantum emitters as well as to interface multiwavelength channels for many nano-optical…
Exposure of protein-repelling oligo(ethylene glycol) (OEG) terminated alkanethiolate (AT) monolayers to ultraviolet (UV) light results in the damage of the OEG chains and photooxidation of the thiolate headgroups, which can be used for controlled tuning of protein-repelling properties within the so-called UV direct wr…
To satisfy the low loss requirement of magnetically suspended rotors, such as energy-storage flywheel, a novel radial permanent-magnet biased magnetic bearing (RPMB) with low rotating loss due to low flux fluctuation frequency in rotor core called homopolar 2-pole RPMB was proposed. A rotating loss separation method w…
We demonstrate high-finesse plasmonic metamaterial with strong resonant response in the near-IR spectral range fabricated using a thin low-loss film of gold monocrystal. The monocrystal was grown using specially formulated simplified crystal growth procedure based on epitaxial deposition, which makes it readily access…
By applying formulation based on time reversibility, we provide the analytic theory of resonance properties of metallic nanoslit arrays. We model lossy resonant systems in which a resonance is induced by a single quasi-bound mode (QBM). It is consistent with the Fano resonance theory of quantum interference of auto-io…
In order to clarify the temporal interplay of the different photocurrent mechanisms occurring in single GaAs nanowire based circuits, we introduce an on-chip photocurrent pump-probe spectroscopy with a picosecond time resolution. We identify photoinduced thermoelectric, displacement, and carrier lifetime limited curre…
Nanoscale Al/SiC composite laminates have unique properties, such as high strength, high toughness, and damage tolerance. In this article, the high-temperature nanoindentation response of Al/SiC nanolaminates is explored from room temperature up to 300°C. Selected nanoindentations were analyzed postmortem using focuse…
Despite myriad potential advantages over piezoelectric ultrasound transducers, capacitive micromachined ultrasound transducers (CMUTs) have not yet seen widespread commercial implementation. The possible reasons for this may include key issues of the following: (1) long-term device reliability and (2) electrical safet…
We examined the mechanism of accumulation of charged polynuclear platinum complexes (PPCs) based on analogy of polyarginine interactions with the cell surface heparan sulfate proteoglycan (HSPG) family of protein-linked glycosoaminoglycan polysaccharides (GAGs). GAGS such as heparan sulfate (HS) and chondroitin sulfat…
How microorganisms obtain energy is a challenging topic, and there have been numerous studies on the mechanisms involved. Here, we focus on the energy substrate traffic in the hyperthermophilic bacterium Aquifex aeolicus. This bacterium can use insoluble sulfur as an energy substrate and has an intricate sulfur energy…
A multiscale experimental study of the structural, compositional, and morphological characteristics of aluminosilicate (LTA) and pure-silica (MFI) zeolite materials surface-modified with MgO x H y nanostructures is presented. These characteristics are correlated with the suitability of such materials in the fabricatio…
The optical properties of single crystals of the high-temperature superconductor La${}_{2\ensuremath{-}x}$Ba${}_{x}$CuO${}_{4}$ have been measured over a wide frequency and temperature range for light polarized in the a-b planes and along the $c$ axis. Three different Ba concentrations have been examined, $x=0.095$ wi…
Doxorubicin exhibits unusual photoreactivity in aqueous solutions. Our data show that there are two distinct photoreactive pathways for doxorubicin. One is a two-step process that leads to the formation of 3-methoxysalicylic acid, a stable degradation product. The other pathway is a photoreduction of doxorubicin to fo…
The coupling of angstrom-sized electron probes with spin-polarized electronic transitions shows that the inelastically scattered probe electron is in a mixed state containing electron vortices with nonzero orbital angular momentum. These electrons create an asymmetric intensity distribution in energy filtered diffract…
One-step synthesis of poly(butyl cyanoacrylate- co -propargyl cyanoacrylate) (P(BCA/PCA)) and polyurethane (PUR) azide nanocapsules for direct covalent and variable functionalization is reported. The capsules in the size range between 230 and 350 nm were synthesized in an inverse (water-in-oil) miniemulsion system thr…
A new type of thiourea cross-linked chitosan with Fe(III) as template (TCCTS template) was synthesized. The adsorption of Fe(II) and Fe(III) on this TCCTS template was studied. The factors affecting adsorption such as pH and contact time were considered. The results showed that the optimum pH value for adsorption was…
Dye-sensitized solar cells have recently drawn much attention because of their cost effectiveness and easy manufacturing process. However, the challenge lies in minimizing the cost of sensitizer dyes and the platinum-based counter electrode. Natural dyes such as red cabbage, red perilla, rosella, blue pea, and curcumi…