Materials Literature
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We present a novel method for creating asymmetrical particles with unusual, flattened shapes from colloidal latex microspheres pinned at an oil-water interface. The shape and degree of asymmetry are controlled by incubating particles for minutes to tens of minutes at an elevated temperature. Estimates of the surface e…
Making a stack: Helical columnar architectures are prepared by a hierarchical self-assembly process involving H-bonding, π–π, and ion–dipole interactions (see picture). The strategic combination of these supramolecular interactions within mesomorphic systems yields materials in which photoinduced chirality and the inc…
Silica nanorods were successfully prepared through a sol-gel process in the presence of carboxylic-functionalized single-walled carbon nanotubes (C-SWCNTs). The effect of chemical functionalization of single-walled carbon nanotubes (SWCNTs) on the growth of the silica layer was investigated using pristine SWCNTs (P-SW…
Titania nanocontainers were synthesized through a two-step process and then loaded with 8-hydroxyquinoline (8-HQ) and p-toluenesulfonic acid (p-TSA). The size of the containers was 242 +/- 10 nm as determined by Scanning Electron Microscopy (SEM). X-Ray Diffraction Analysis (XRD) showed that the titania nanocontainers…
We present a theoretical approach to scale the artificially fast dynamics of simulated coarse-grained polymer liquids down to its realistic value. As coarse graining affects entropy and dissipation, two factors enter the rescaling: inclusion of intramolecular vibrational degrees of freedom and rescaling of the frictio…
Surface modification is essential in biomedical applications and nanotechnological developments. We report a novel method using surface-enhanced Raman spectroscopy (SERS) for quantifying ligand adsorption onto gold nanoparticles (AuNPs). After centrifugal or settlement removal of the AuNPs-ligand complex, the amount o…
Photo-cross-linkable, functionalized, and thermosensitive polyphosphazenes were synthesized to develop a dual cross-linking system with properties of mechanically suitable strength and controllable biodegradation for injectable biomedical applications. The aqueous solutions of the polymers exhibited sol-gel transition…
This paper reports the hydrogen storage properties of a ternary hydride system, LiAlH 4 −MgH 2 −LiBH 4 (molar ratio 1:1:1), both undoped and doped with TiF 3 addition. It was found that there is a mutual destabilization among the three hydrides. This new ternary system possesses superior hydrogen desorption properties…
High-quality Cd3P2 nanocrystals with various sizes from 1.6 to 12 nm were prepared. Correspondingly, the size tuning emissions cover a broad range from 450 to over 1500 nm with quantum efficiencies of 30−70%.This synthetic approach would open a new route for synthesis of other II−V nanocrystals.
We have studied a ${\text{EuFe}}_{2}{\text{As}}_{2}$ single crystal by neutron diffraction under magnetic fields up to 3.5 T and temperatures down to 2 K. A field-induced spin reorientation is observed in the presence of a magnetic field along both the $a$ and $c$ axes, respectively. Above critical field, the ground-s…
Charge/discharge processes of organic radical batteries based on the radical polymer's redox reaction are largely influenced by carbon fibers consisting in the composite electrodes to help electron transfer. To find the optimal structure of the composite electrodes, the dominant electron transfer processes were determ…
Because of its unique electronic transport properties, graphene has attracted an enormous amount of interest recently. By using standard Auger electron spectroscopy and Raman spectroscopy, we have studied electron-beam irradiation effects on graphene damage. We have shown that irradiation with an electron-beam can sel…
Biodegradable elastomers based on polycondensation reactions of xylitol with sebacic acid, referred to as poly(xylitol sebacate) (PXS) elastomers have recently been developed. We describe the in vivo behavior of PXS elastomers. Four PXS elastomers were synthesized, characterized, and compared with poly(L-lactic-co-gly…
Abstract The ability to design and predict new phases in solid‐state chemistry remains a challenge. However, experiment and theory have been working together in the last decade to find new phases with targeted magnetic properties in the family of transition‐metal‐rich borides. These studies were very successful for bo…
New bimetallic Ni−Au supported nanoparticle catalysts were prepared by using dendrimer templated nanoparticles. Amine-terminated generation 5 polyamidoamine (PAMAM) dendrimers were anchored to a commercial silica with a siloxane linked anhydride. The dendrimer was then alkylated and used to template Ni−Au nanoparticle…
Zinc Oxide (ZnO) is a promising candidate material for optical and electronic devices due to its direct wide band gap (3.37 eV) and high exciton binding energy (60 meV). For applications in various fields such as light emitting diode (LED) and laser diodes, growth of p-type ZnO is a prerequisite. ZnO is an intrinsical…
We demonstrate amorphization in a Ge(10)Sb(2)Te(13) (GST) thin film through a nonthermal process by femtosecond electronic excitation. Amorphous recording marks were formed by irradiation with a single femtosecond pulse, and were confirmed to be recrystallized by laser thermal annealing. Scanning electron microscope o…
The novelty of this work is based on designing the chemistry of the electrospun nanofibers, so that the resultant composites substantially benefit from cross-linking between the nanofibers and the polymer matrix. Specifically, the solution of in-house synthesized copolymers polystyrene-co-glycidyl methacrylate P(St-co…
Poly(ethylene glycol) (PEG) is often attached to compounds to increase serum half-life, reduce immunogenicity, and enhance bioavailability. Accurate and sensitive quantification of PEG conjugates is critical for product development, pharmacokinetic measurements, and efficacy studies. However, PEGylated compounds can b…
The site-dependent and spontaneous functionalization of 4-bromobenzene diazonium tetrafluoroborate (4-BBDT) and its doping effect on a mechanically exfoliated graphene (MEG) were investigated. The spatially resolved Raman spectra obtained from both edge and basal region of MEG revealed that 4-BBDT molecules were nonco…