Materials Literature
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We demonstrate that chemically stable, multifunctional polymer thin films can be obtained using the layer-by-layer (LbL) deposition based on covalent bonds between adsorbing chains. Poly(pentafluorophenyl-4-vinylbenzoate) (P1) or poly(pentafluorophenylacrylate) (P2) polymers were assembled with poly(allyl amine) (PAAm…
Graphene sheets with regular perforations, dubbed as antidot lattices, have theoretically been predicted to have a number of interesting properties. Their recent experimental realization with lattice constants below 100 nanometers stresses the urgency of a thorough understanding of their electronic properties. In this…
Polyaniline (PANI)-tethered cubic polyhedral oligomeric silsesquioxane (POSS) in emeraldine base (EB) form is synthesized via oxidative copolymerization of octa(aminophenyl) silsesquioxane and aniline in the presence of HCl followed by the treatment with triethylamine. The chemical structures of POSS-PANI-EB are eluci…
Hollow silica nanospheres with mesoporous shells were successfully fabricated with a new one-pot strategy by using a thermosensitive polymer, poly(N-isopropylacrylamide) (PNIPAm), as a reversible template without the need of further calcination or chemical etching. By simply regulating the solution temperature with re…
Naturally occurring bile acids are ideal building blocks for a new generation of biomaterials displaying low systemic toxicity and engineered properties. Herein we report the synthesis of bile acid-based polyesters using entropy-driven ring-opening metathesis polymerization (ED-ROMP) and characterization of the struct…
Superhydrophobic surfaces composed of single-crystalline nanowires of an organic semiconductor are demonstrated by model water striders. Model copper water striders with self-assembled crystalline nanowires on their “legs” can nicely “stand” on the surface of water. 1.0 mg of such nanowires could support a 372 mg mode…
Microcapsules containing phase change material for textile thermal insulation were synthesized and characterized. Prior to the encapsulation, the formation, the stability and phase change behavior of paraffin mixture were studied to define an optimum formulation with a wide temperature range. The addition of approxima…
A facile method is developed for the preparation of high-quality, water-soluble, and near-infrared (NIR)-emitting CdSeTe alloyed quantum dots (AQdots) with L-cysteine as the capping agent. By changing the size and the composition of AQdots the photoluminescent quantum yield (QY) can reach as high as 53% and the emissi…
Novel and uniform mesoporous silica particles with controllable cavities in their surface have been fabricated using PAA and CTAB as dual templates in a mild reaction system. Herein, a series of hierarchically distinct silica particles can be obtained by simply adjusting the mass ratios (R) of PAA to CTAB. When the R…
Model cellulose surfaces based on cellulose nanocrystals (CNs) were prepared by the Langmuir-Schaeffer technique. Cellulose nanocrystals were obtained by acid hydrolysis of different natural fibers, producing rodlike nanoparticles with differences in charge density, aspect ratio, and crystallinity. Dioctadecyldimethyl…
It is known that the edges of a two-dimensional slab of insulating ${\text{MoS}}_{2}$ exhibit one-dimensional metallic edge states, the so-called ``brim states.'' Here, we find from density-functional theory calculations that several edge structures, which are relevant for the hydrodesulfurization process, are magneti…
Density functional (M06-L and B3LYP) and multiconfigurational second-order perturbation (CASPT2) theories are applied to [n]-cyclacenes having n = 6–12 in order to assess their strain energies and the degree of di- or polyradical character inherent in their electronic structures. In the case of density functional theo…
Nanostructured (porous) silicon is a promising biodegradable biomaterial, which is being intensively researched as a tissue engineering scaffold and drug-delivery vehicle. Here, we tested the biocompatibility of non-treated and thermally-oxidized porous silicon particles using an indirect cell viability assay. Initial…
Ballistic transport through a collection of quantum billiards in undoped graphene is studied analytically within the conformal mapping technique. The billiards show pseudodiffusive behavior, with the conductance equal to that of a classical conductor characterized by the conductivity ${\ensuremath{\sigma}}_{0}=4{e}^{2…
An electroless deposition method comprised of seed formation and subsequent seeded growth is developed for the decoration of surface-grown single-walled carbon nanotubes (SWCNTs) with gold nanoparticles of controlled size and interparticle distance. The density of the gold nanoparticles is determined by the density of…
Nanocomposite fibrous membranes have been fabricated by electrospinning cellulose nanocrystal (CNC)-loaded poly(acrylic acid) (PAA) ethanol mixtures. Incorporating CNC in PAA significantly reduced fiber diameters and improved fiber uniformity. The average diameters of the as-spun nanocomposite fibers were significantl…
We measure changes in the penetration depth $\ensuremath{\lambda}$ of the ${T}_{c}\ensuremath{\approx}6\text{ }\text{ }\mathrm{K}$ superconductor LaFePO. In the process, scanning SQUID susceptometry is demonstrated as a technique for accurately measuring local temperature-dependent changes in $\ensuremath{\lambda}$, i…
Fluorescent nanoparticles containing a gadolinium oxide core are very attractive because they are able to combine both imaging (fluorescence imaging, magnetic resonance imaging) and therapy (X-ray therapy and neutron-capture therapy) techniques. The exploitation of these multifunctional particles for in vivo applicati…
Lithium borohydride is a promising candidate for hydrogen storage and fuel cell application due to its high hydrogen content. In the present work, the effect of various oxides on the dehydrogenation of LiBH 4 was investigated. The MS-TG results showed that the LiBH 4 /oxide mixtures were able to dehydrogenate at much…
Protein adsorption, as the primary process occurring when a foreign surface comes into contact with a biosystem, was studied on thin polymer brush films consisting of poly(N-isopropylacrylamide) (PNIPAAm) and poly(2-vinylpyridine) (P2VP). These films were prepared by the "grafting to" method. The protein resistance of…