Materials Literature
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It is widely known that macromolecules, such as proteins, can control the nucleation and growth of inorganic solids in biomineralizing organisms. However, what is not known are the complementary molecular interactions, organization, and rearrangements that occur when proteins interact with inorganic solids during the…
Abstract We investigate a d ‐dimensional model ( d = 2,3) for sound waves in a disordered environment, in which the local fluctuations of the elastic modulus are spatially correlated with a certain correlation length. The model is solved analytically by means of a field‐theoretical effective‐medium theory (self‐consis…
We report on the formation of quasi-two-dimensional nanostructures of silicon by quenching liquid silicon confined in slit nanopores. The formation processes are investigated by molecular-dynamics (MD) calculations using the Tersoff potential. We find that single- or double-layer nanosheets are formed according to the…
Zirconium diboride and a zirconium diboride/tantalum diboride mixture were synthesized by solution‐based processing. Zirconium n ‐propoxide was refluxed with 2,4‐pentanedione to form zirconium diketonate. This compound hydrolyzed in a controllable fashion to form a zirconia precursor. Boria and carbon precursors were…
Electrospun fibrous scaffolds are being developed for the engineering of numerous tissues. Advantages of electrospun scaffolds include the similarity in fiber diameter to elements of the native extracellular matrix and the ability to align fibers within the scaffold to control and direct cellular interactions and matr…
Since bacterial infections associated with implants remain a major cause of their failure, this study investigated the use of polyelectrolyte multilayers (PEMs) comprising hyaluronic acid (HA) and chitosan (CH) to confer antibacterial properties on titanium (Ti). HA and CH were deposited on Ti using the layer-by-layer…
The electronic structure and optical properties of $\mathrm{La}\mathrm{Cr}{\mathrm{O}}_{3}$ have been calculated and the origin of the light green color of $\mathrm{La}\mathrm{Cr}{\mathrm{O}}_{3}$ has been identified. An optical gap of ${\ensuremath{\Delta}}_{1}=3.4\phantom{\rule{0.3em}{0ex}}\mathrm{eV}$ was reproduce…
We report on the use of patterned superhydrophobic silicon nanowire surfaces for the efficient, selective transfer of biological molecules and nanoparticles. Superhydrophilic patterns are prepared on superhydrophobic silicon nanowire surfaces using standard optical lithography. The resulting water-repellent surface al…
Porous silicon carbide (SiC) ceramics with porosities ranging from 60% to 83% were fabricated from extruded blends of carbon‐filled polysiloxane using expandable microspheres as sacrificial templates. The fabrication process involved the following steps: (i) extrusion and in situ foaming of a mixture of polysiloxane,…
AIMS: The study of an algicidal activity and mechanism of the isolated Pseudomonas fluorescens HYK0210-SK09 (SK09) against a winter bloomed harmful diatom, Stephanodiscus hantzschii. METHODS AND RESULTS: SK09 was isolated from the Paldang reservoir, Korea and used to biological control of S. hantzschii. The inoculatio…
Abstract A theoretical model is presented to describe the chemical mechanism of surface‐enhanced resonance Raman scattering (SERRS) via charge transfer (CT) in the pyridine–Ag 2 complex. We first describe the influence of the interaction between the metal cluster and pyridine to the ground‐state properties of the pyri…
We report the ligand-exchange reaction between the optically inactive racemic penicillamine monolayer on a silver nanocluster surface and enantiopure D- or L-penicillamine dissolved in solution. Emergence of the identical band positions in the gel electrophoresis separation assures the presence of size-invariant silve…
We report the observation of appreciable enhancement of fluorescence induced by large Au colloids on a solid support. Au colloids 40, 59, and 81 nm in radius were homogeneously deposited on glass substrates with varying average particle distances and interparticle coupling. The fluorescence enhancement was examined by…
We compared conductive transparent carbon nanotube coatings on glass substrates made of differently produced single-wall (SWNT), double-wall, and multiwall carbon nanotubes. The airbrushing approach and the vacuum filtration method were utilized for the fabrication of carbon nanotube films. The optoelectronic performa…
The development of multifunctional nanoparticles that have dual capabilities of tumor imaging and delivering therapeutic agents into tumor cells holds great promises for novel approaches for tumor imaging and therapy. We have engineered urokinase plasminogen activator receptor (uPAR) targeted biodegradable nanoparticl…
Despite the numerous experimental and theoretical studies on the negatively charged nitrogen vacancy center $({\mathrm{NV}}^{\ensuremath{-}})$ in diamond and the predictions that the neutral nitrogen vacancy center $({\mathrm{NV}}^{0})$ should have an $S=\frac{1}{2}$ ground state, ${\mathrm{NV}}^{0}$ has not previousl…
The delivery of hyperthermic thermoseeds to a specific target site with minimal side effects is an important challenge in targeted hyperthermia, which employs magnetic method and functional polymers. An external magnetic field is used to control the site-specific targeting of the magnetic nanoparticles. Polymer-coated…
Blooming block copolymers! Uniform droplets of solvent that contain amphiphilic polystyrene–poly(ethylene oxide) diblock copolymers are prepared using a microcapillary device. Solvent removal drives interfacial instabilities, through which the polymer assembles into complex hierarchical microparticle structures (see p…
The piezoresistive behavior of a silicon carbonitride ceramic derived from a polymer precursor is investigated under a uniaxial compressive loading condition. The electric conductivity has been measured as a function of the applied stress along both longitudinal and transverse directions. The gauge factor of the mater…
We have followed the dynamic redox process taking place in individual ceria zirconia nanoparticles with changes in the oxygen chemical potential using an in situ environmental transmission electron microscopy (ETEM). We observe considerable variability in the redox activity and have been able to correlate these differ…