Materials Literature
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Polyethylene glycol (PEG) brushes are used to reduce protein adsorption at surfaces. Their design needs to allow for two leading adsorption modes at the brush-coated surface. One is primary adsorption at the surface itself. The second is ternary adsorption within the brush as a result of weak PEG-protein attraction. W…
To make more effective use of underutilized resources, acid-solubilized collagen (ASC) and pepsin-solubilized collagen (PSC) were isolated from the skin of deep-sea redfish (Sebastes mentella) and characterized for their potential in commercial applications. The yield of ASC (47.5%) was lower compared to PSC (92.2%),…
We have investigated the thermal behavior of a set of model linear thermoplastic polyurethanes (TPU) with a relatively high content of hard segments: from 50 to 100 wt %. The soft segment of these samples consists of poly(propylene oxide), end-capped with ethylene oxide (EO−PPO−EO), while the hard segment is composed…
We report results of a magneto-optical investigation of the Zintl-phase compound EuIn$_2$P$_2$. The compound orders magnetically at $T_C$=24 K and exhibits concomitant large magnetoresistance effects. For $T\le$50 K and increasing magnetic fields we observe a transfer of spectral weight in $σ_1(ω)$ from energies above…
This work focuses on the physicochemical characterization of dendrigraft poly-L-lysines (DGLs) obtained by polymerization of N-carboxyanhydride in buffered water (pH 6.5). Diffusion coefficients (D) and hydrodynamic radii (Rh) of five successive DGL generations were determined by Taylor dispersion analysis (TDA). To o…
Although (103) is a stable nominal orientation for both silicon and germanium, experimental observations revealed that in the case of silicon this surface remains disordered on an atomic scale even after careful annealing. We report here a set of low-energy reconstruction models corresponding to $1\times 2$, $2\times…
With density functional theory, studied are the local magnetic moments in Fe-Al alloys depending on concentration and Fe nearest environment. At zero temperature, the system can be in different states: ferromagnetic, antiferromagnetic and spin-spiral waves (SSW) which has a minimum energy. Both SSW and negative moment…
Cementite Fe3C is studied with first-principles calculations. Two possible positions of carbon atoms in the iron sublattice are considered: with prismatic or octahedral environment. Mossbauer spectra (MS) with parameters calculated for both modifications are simulated above and below the Curie temperature. A possibili…
We show that electron irradiation in a dedicated scanning transmission microscope can be used as a nano-electron-lithography technique allowing the controlled reshaping of single walled carbon and boron nitride nanotubes. The required irradiation conditions have been optimised on the basis of total knock-on cross sect…
We discuss an efficiency of various band structure algorithms in determining the Fermi surface (FS) of the paramagnetic ErGa3. The linear muffin-tin orbital (LMTO) in the atomic sphere approximation (ASA) method and three full potential (FP) codes: FP-LMTO, FP linear augmented plane wave (FLAPW), and FP local orbitals…
Microfluidic devices were fabricated from silk fibroin using an aqueous molding process adapted from soft lithography. The process results in mechanically robust, patent devices with macroscopic fluidic connections. Hepatocytes were seeded in the device and perfused for up to five days during which they exhibited live…
We investigate the quantum Hall (QH) states near the charge-neutral Dirac point of a high mobility graphene sample in high magnetic fields. We find that the QH states at filling factors nu=+/-1 depend only on the perpendicular component of the field with respect to the graphene plane, indicating that they are not spin…
Abstract Porphyrins and phthalocyanines have outstanding chemical and thermal stability. The macrocyclic structure and chemical reactivity of tetrapyrroles offers architectural flexibility and facilitates the tailoring of chemical, physical and optoelectronic parameters. The specific optical properties of the tetrapyr…
Measurements of the optical rotation of LiB 3 O 5 have been carried out using a high-accuracy universal polarimeter in the temperature range 298–503 K. The results have been analyzed within the framework of a point-dipole model for the optical rotation. Though the magnitude of the rotation is very small, its sign has…
Abstract How fibroin molecules fold themselves and further self‐assemble into aggregations with specific structures when the solution concentration increases is the key to understanding the natural silk‐forming process of the silkworm. A regenerated Bombyx mori silk fibroin solution was prepared, and serially diluted…
Abstract In the present study plasma polymerization of tetraethylorthosilicate and hexamethyldisiloxane was carried out on polyethylene film with an aim of enhancing barrier properties. The glow discharge was obtained at 0.2 mbar using 13.56 MHz radio frequency source capable of giving power out put up to 100 W. The m…
ZnO p–n homojunction light-emitting diodes were fabricated on p-GaAs substrates by metal-organic chemical vapor deposition. The current–voltage characteristics showed a diode characteristic between the n-type and p-type ZnO layers with a threshold voltage of 3.8 V. We present a room-temperature study of photoluminesce…
Abstract A series of carboxymethyl chitosan (CMC) with 2.4‐dihydoxybenzophenone (UV‐0) substituent were synthesized by the Mannich reaction of CMC hydrochloride and UV‐0 in the solvent of methanol and water. The different molar degree of substitution (MS) was achieved by changing the UV‐0 content. The effects of MS on…
The influence of corrugation, impurities, heterogeneity of tube diameters, shape of the interchannels, and carbon vacancies in the ${\mathrm{H}}_{2}$ uptake by a bundle of carbon nanotubes was studied. It was found that both the existence of tubes of different chiralities and the presence of vacancies in narrow inters…
Electrochemical etching of pores in as-grown and doped n-type ZnSe substrates is reported. To dope the samples the as-grown semi-insulating substrates were annealed in a Zn melt containing Al impurity at concentrations ranging from 0.1 to 40 at.%. We demonstrate the growth of arrays of parallel pores with diameters ra…