Materials Literature
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We present molecular dynamics simulation evidence for a freezing transition from liquid silicon to quasi-two-dimensional (quasi-2D) bilayer silicon in a slit nanopore. This new quasi-2D polymorph of silicon exhibits a bilayer hexagonal structure in which the covalent coordination number of every silicon atom is four.…
Doping ease and the ability to readily nanoimprint silk films offer the possibility to rapidly prototype photonic devices that couple optical functions with embedded material properties. By imprinting fluorescent silk films with periodic nanoscale lattices matched to the emission spectra of the doping fluorophores it…
Thin films of single-walled carbon nanotubes (SWNTs) are a viable nanomaterial for next generation sensors, transistors, and electrodes for solar cells and displays. Despite their remarkable properties, challenges in synthesis and processing have hindered integration in current electronics. Challenges include the inab…
Because of the increased use of titanium dioxide (TiO2) nanoparticles (NPs) in tissue engineering (TE), and in new constructs for cardiac TE, their effect was studied on three relevant cell types: Adult rat ventricular cardiomyocytes, human embryonic stem cell-derived cardiomyocytes (hESC-CM) and fibroblasts. For adul…
The work in this paper aims to portray a complete structural, magnetic, and theoretical description of two original end-to-end (EE) μ(1,3)-azide-bridged, cyclic tetranuclear Ni(II) clusters, [{Ni(II)(L(1))(μ(1,3)-N(3))(H(2)O)}(4)] (1) and [{Ni(II)(L(2))(μ(1,3)-N(3))(H(2)O)}(4)] (2), where the ligands used to achieve t…
The displacement caused by an applied sinusoidal voltage and electrochemical impedance spectroscopy are used to analyze the electromechanical behavior of bucky-gel single-walled carbon nanotube actuators containing an ionic liquid. This behavior can be understood in terms of complex capacitance diagrams and the freque…
We study the dynamics of the coverage and aggregation of gold nanoparticles over organosilanized glass substrates for different sizes of nanoparticles. We present measurements of extinction spectra and nanoparticle counting statistics and demonstrate that both methods are equivalent describing those processes. We intr…
Micro- and nano-sized magnetic support is a recently developed revolutionary technology for bioseparation, especially for ligand fishing, protein, enzyme, DNA, RNA and cell isolation or purification. Magnetic nanoparticles (MPs) are referred to by various synonyms, such as magnetic beads (MB) or micro- and nano-sized…
Nanocomposites were developed by cross-linking cellulose nanowhiskers with poly(methyl vinyl ether-co-maleic acid) and polyethylene glycol. Nuclear magnetic resonance (NMR) studies showed cross-linking occurs between the matrix and cellulose nanowhiskers via an esterification reaction. Proton NMR T(2) relaxation exper…
We demonstrate a two-dimensional (2D) polarization-independent resonant subwavelength grating (RSG) in a filter array. RSGs, also called guided mode resonant filters, are traditionally one-dimensional gratings; however, this leads to TE and TM resonances at different wavelengths and with different spectral shape. A 2D…
Highly magnetic MnFe2O4 nanocrystals (NCs) are coated with non-cross-linked carboxymethyl polyvinyl alcohol to produce conjugates that are highly stable under varying temperatures, pH, and ionic strengths. The polymer-coated NCs exhibit low nonspecific cell binding. They are also amenable to chemical linking with biom…
Abstract Biodegradable poly( L ‐lactide) (PLA)/silica (SiO 2 ) nanocomposites were prepared by melt compounding to investigate the effect of spherical nanofillers on the thermal stability of PLA. The nanocomposites displayed improved thermal stability both under nitrogen and in air. The stabilization mechanism was att…
There is a paucity of data regarding the safety of administering solid gold nanoparticles (AuNPs) in large animal tumor models. We assessed the acute toxicity and biodistribution of 5 nm and 25 nm solid AuNPs in New Zealand White rabbits (n = 6 in each) with implanted liver Vx2 tumors 24 h after intravenous injection.…
We present a microwave realization of finite tight-binding graphene-like structures. The structures are realized using disks with a high index of refraction. The disks are placed on a metallic surface while a second surface is adjusted atop the disks, such that the waves coupling the disks in the air are evanescent, l…
On the basis of existing experiments, the grain-size effect on the permittivity and dielectric function in the case of ferroelectric and relaxor ferroelectric dense single-phase ceramics is reviewed and critically discussed. Relevant data exist for BaTiO3 (BTO), SrTiO3 (STO), Pb(Zr,Ti)O3 (PZT), Pb(Mg1/3Nb2/3)O3 (PMN)…
Breaking out: Liposomes that are adsorbed onto porous CaCO3 particles and that contain the peroxidase substrate Amplex Red (AR) are disrupted by ultrasonic treatment. The substrate is released and diffuses into the inner part of the multicompartment containers where the peroxidase enzyme is found, and the enzymatic re…
The first successful approach to synthesizing ultrabright fluorescent mesoporous silica nanoparticles is reported. Fluorescent dye is physically entrapped inside nanochannels of a silica matrix created during templated sol-gel self-assembly. The problem of dye leakage from open channels is solved by incorporation of h…
Abstract In this contribution, we present details on a recently installed hot‐wall reactor for graphene growth on silicon carbide (SiC) in argon under atmospheric pressure. Both preparation steps, i.e., the preconditioning of the SiC substrate by hydrogen etching and the graphene growth are performed in this setup in…
A general route was demonstrated to realize the patterning of reduced graphene oxide sheets (RGOs) on a variety of substrates by a combination of modulating the solution wettability of the substrates and spin-coating process. By virtue of usual surface treatment technique or application of mixed solvent, the GO soluti…
By simply applying an electric current across a graphene oxide (GO) film, GO can be easily recovered to produce reduced GO (RGO). The resulting RGO film can be used as efficient gap electrodes in organic photoswitching devices, which display comparable efficiency to those using Au as gap electrodes.