Materials Literature
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The influence of sodium on the band structure of MoS2(0001) and the comparison of the experimental band dispersion with density functional theory show excellent agreement for the occupied states (angle-resolved photoemission) and qualitative agreement for the unoccupied states (inverse photoemission spectroscopy). Na-…
Density functional theory (DFT and time-dependent-DFT (TD-DFT) were employed to investigate the vibroelectronic structural properties of porphyrin and some derivatives: unsubstituted porphyrin (TPyr), meso-tetraphenylporphyrin (TPP), meso-tetrakis(p-sulfonatophenyl)porphyrin (TSPP), protonated-TPyr (H2TPyr), deuterate…
The solubility of penicillin V potassium (PVK) in binary ethanol + water and 1-butyl alcohol + water solvent mixtures was measured at temperatures ranging from (278.15 to 313.15) K. The solubility in ethanol + water was measured by a static analytical method while in 1-butyl alcohol + water a dynamic method was adopte…
In this work we report a fully aqueous and highly efficient method for the encapsulation of enzymes in silica nanocapsules during their formation process. In this approach, enzymes are first enclosed into unilamellar vesicles self-assembled by an amphiphilic precursor polymer - poly(ethylene glycol) substituted hyperb…
The homo and co-polymerization of a large ring size lactone afforded unsaturated poly(esters), further modified to functional thermoplastic materials.
The influence of silicene's strong spin-orbit interaction and of an external electric field ${E}_{z}$ on the transport coefficients are investigated in the presence of a perpendicular magnetic field $B$. For finite ${E}_{z}$ the spin and valley degeneracy of the Landau levels is lifted and leads to additional plateaus…
Adsorption of strong polyelectrolyte, poly(styrenesulfonate), PSS, of different molecular weights onto large α -Al 2 O 3 beads was systematically investigated as functions of pH and NaCl concentrations. The ultraviolet (UV) absorption spectra of PSS at different pH and salt concentrations confirmed that the structure…
Carbon nanotubes (CNTs) are widely known to agglomerate into difficult to separate, 10–100 μm bundles, even after suspension in solution. Here, a dry and rapid (≈10 s) method to deagglomerate bulk, unbound multi‐walled CNT bundles due to surface acoustic waves (SAW) in a piezoelectric substrate is reported for the fir…
Small carbon nano-onions (CNOs, 6-12 shells) were prepared in high yields and functionalized with carboxylic groups by chemical oxidation and reacted with βCD-NH2 to yield CNOs decorated with βCDs. A biocompatibile dextran polymer with graphted ferrocene groups was employed for the supramolecular self-assembly on the…
The absolute photoluminescence (PL) quantum yield (QY) of multilayers of Silicon nanocrystals (SiNCs) separated by SiO2 barriers were thoroughly studied as function of the barrier thickness, excitation wavelength, and temperature. By mastering the plasma-enhanced chemical vapor deposition growth, we produce a series o…
In this paper we show how surface coordination chemistry can elucidate one of the reproducibility issues related to the classical synthesis of gold nanoparticles by the Turkevich method.
A superior degree of functionality in materials can be expected, if two or more operational entities are related in a cooperative form. It is obvious that, for this purpose, one is seeking materials with complex design comprising bi- or multiple functional groups complementing each other. In the current paper, it is d…
CaCO3 acts as a gasification agent during magnesiothermic reduction of graphene oxide, thus preventing the newly formed graphene from restacking. The surface area of the obtained graphene increases from 66 m(2) g(-1) to 603 m(2) g(-1) by adding CaCO3 with a high yield of ∼70% based on the carbon content in graphene ox…
We establish a quantitative analogy between polymer grafted nanoparticles (PGNPs) and patchy nanoparticles (NPs). Over much of the experimentally relevant parameter space, we show that PGNPs behave quantitatively like Janus NPs, with the patch size having a universal dependence on the number of grafts and the ratio of…
Although many studies reporting the organ-level biodistribution of nanoparticles (NPs) in animals, very few have addressed the fate of NPs in organs at the cellular level. The liver appears to be the main organ for accumulation of NPs after intravenous injection. In this study, for the first time, the in vivo spatiote…
Perfectly lattice-matched magnetic tunnel junctions (MTJs) consisting of a Heusler alloy B2-Co2FeAl (CFA) electrode and a cation-disorder spinel (Mg-Al-O) barrier were fabricated by sputtering and plasma oxidation. We achieved a large tunnel magnetoresistance (TMR) ratio of 228% at room temperature (RT) (398% at 5 K)…
Three types of commercially derived methylsilicone materials, Sylgard-184, Q(V)Q(H) (an MQ-based silicone containing no dimethylsiloxane, D units), and D(V)D(H) (a D-based silicone with no additives), were judiciously chosen to study the conditions under which long-lasting hydrophilicity after oxygen plasma treatment…
We report photoluminescence measurements performed on monolayer- and two-layer-MoS2 placed on two types of mixed self-assembled monolayers (mSAMs) of photoswitchable azobenzene molecules. The two mSAMs differ via the electronegative character of the azobenzene derivatives. Thin layers of a transition metal dichalcogen…
In this study, a dual-ligand polymer-lipid hybrid nanoparticle drug delivery vehicle comprised of an anti-HER2/neu peptide (AHNP) mimic with a modified HIV-1 Tat (mTAT) was established for the targeted treatment of Her2/neu-overexpressing cells. The resultant dual-ligand hybrid nanoparticles (NPs) consisted of a poly(…
Nitrogen doped carbon fluorescent quantum dots (NDCFDs) with downconversion fluorescent and upconversion fluorescence properties were prepared by an ultrasonic one-step process. The raw materials and reagents were inexpensive and easy to obtain. The effect of ultrasonic time and reaction temperature on the fluorescent…