Materials Literature
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Mimicking cellular microenvironments by MEMS technology is one of the emerging research areas. Integrated biomimetic systems with nanofiber polymer networks and microfluidic chips were fabricated and cellular behaviors were observed by changing surface characteristics of nanofibers and flow rates of microchannels. Mod…
The interaction of CH 2 O with perfect and defective TiO 2 (110) surfaces (produced by overannealing and Ar ion sputtering methods) was studied by thermal desorption spectroscopy, high-resolution electron energy loss spectroscopy (HREELS), and density functional theory (DFT) calculations. Exposing the perfect TiO 2 (1…
A new complex, Cp* 2Sm(tpy) ( 1, where Cp* = C 5Me 5, tpy = 2,2':6',2''-terpyridine) and its one-electron oxidized congener [Cp* 2Sm(tpy)]PF 6 ([ 1] (+)) have been synthesized and characterized with the aim of comparing their electronic and magnetic behavior to the known ytterbium analogues: Cp* 2Yb(tpy) ( 2) and [Cp*…
Self-assembling peptide nanofiber scaffolds are an excellent material for applications such as tissue repair, tissue regeneration, instant stopping of bleeding, and slow drug release. We report a new self-assembling peptide D-EAK16 consisting purely of D-amino acids. D-EAK16 and L-EAK16 display mirror-image CD spectra…
Abstract Novel highly branched biodegradable macromolecular systems have been developed by grafting carboxymethylchitosan (CMCht) onto low generation poly(amidoamine) (PAMAM) dendrimers. Such structures organize into sphere‐like nanoparticles that are proposed to be used as carriers to deliver bioactive molecules aime…
We measured the size- and shape-dependent compressibility of the TiO 2 anatase nanoparticles using monochromatic synchrotron X-ray powder diffraction and high-pressure diamond-anvil cell techniques. Compared to the bulk anatase sample, the rice-shaped (3.8 × 5.0 nm) and the rod-shaped (3.5 × 21.0 nm) anatase nanoparti…
Small-angle neutron scattering (SANS) was used to study the changes of segmental interactions and chain conformation due to the formation of lithium−PMMA complexes in polystyrene- block -poly(methyl methacrylate) (PS- b -PMMA) copolymers as a function of temperature and the percentage of carbonyl groups coordinated wi…
A chitosan derivative was prepared with good yields using a "one pot" approach by grafting L-lactide oligomers via ring opening polymerization. Side chains are primarily attached to hydroxyl groups located on carbons 3 and 6 of the glucosamine ring, while the amine group remains nonfunctionalized. By increasing the L-…
Shape-controlled metal nanoparticles are of interest because of their wide range of properties that are useful for applications that include optics, electronics, magnetism, and catalysis. Indium metal is an attractive target for nanoparticle synthesis because it is superconducting, plasmonically active, and is a compo…
Rare-earth orthoferrite LnFeO 3 nanocrystals were traditionally synthesized at temperatures higher than 700 °C. In this study, we developed a general nanosized heterobimetallic precursors approach for the synthesis of nanocrystalline rare-earth orthoferrite LnFeO 3 (Ln = La, Pr, Nd, Sm, Eu, Gd) at 500 °C. The nanosize…
This paper reports the facile synthesis of indium hydroxide nanospheres, nanoflowers, microcubes, and nanorods using a solvothermal method at 240 °C for 18 h in an ethanol solution of indium acetate with the directing surfactants of ethylenediamine, acetic acid, and oleic acid. After calcination of as-synthesized indi…
Using several hundred nanosecond long fully atomistic molecular dynamics simulations, we investigate the monomer and counterion local concentrations in poly amido amide (PAMAM) dendrimer systems for various generations at neutral pH. We also calculate the ζ potential as a function of dendrimer generation. It is found…
The temperature variation of electrical resistivity $\ensuremath{\rho}(T)$ and Seebeck coefficient $S(T)$ of Heusler-type ${\text{Fe}}_{2}{\text{VAl}}_{1\ensuremath{-}x}{\text{B}}_{x}$ $(0\ensuremath{\le}x\ensuremath{\le}1)$ alloys have been investigated. All the studied alloys were crystallized into a single-phase cu…
We introduce a metadynamics based scheme for computing the free energy of nanoparticles as a function of their crystalline order. The method is applied to small nanoparticles of the biomineral calcium carbonate to determine the preferred structure during early stages of crystal growth. For particles 2 nm in diameter,…
In this work, an online preparation of peroxymonocarbonate was formed innovatively, which offered the reliable intermediate for further investigation. Gold colloids with nanoparticles of different sizes were found to enhance the chemiluminescence (CL) of the peroxymonocarbonate-eosin Y system, and the most intensive C…
We report high-resolution photoemission spectroscopy of newly-discovered iron-based layered superconductor La(O$_{0.93}$F$_{0.07}$)FeAs (Tc = 24 K). We found that the superconducting gap shows a marked deviation from the isotropic s-wave symmetry. The estimated gap size at 5 K is 3.6 meV in the s- or axial p-wave case…
Abstract A solution processed n‐channel zinc oxide (ZnO) field effect transistor (FET) was fabricated by simple dip coating and subsequent heat treatment of a zinc acetate film. The field effect mobility of electrons depends on ZnO grain size, controlled by changing the number of coatings and zinc acetate solution con…
Abstract Nanocomposite materials were obtained using sorbitol plasticized waxy maize starch as matrix and tunicin whiskers as the reinforcement. The effect of filler load (0–25 wt % whiskers) and the relative humidity levels (0–98%) on the mechanical behavior of the films are discussed for linear and nonlinear deforma…
The apparent zerogap fermions in α-(BEDT-TTF) 2 I 3 are recently proposed to obey the tilted Weyl equation which is very unusual. The Hall conductivity, the conductivity and the orbital susceptibility are investigated theoretically for electrons described by this tilted Weyl equation. It is found that these quantities…
We explored a very interesting gold nanoparticle system-pegylated gold in colloidal solution-and analyzed its uptake by mice colorectal adenocarcinoma CT26 tumor cells and the impact on the cell's response to x-ray irradiation. We found that exposure to polyethylene glycol (PEG) modified ('pegylated') 4.7 ± 2.6 nm gol…