Materials Literature
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We study the bombardment of a suspended monolayer graphene sheet via different energetic atoms via classical molecular dynamics based on the reactive force field (ReaxFF). We find that the probability, quality, and controllability of defects are mainly determined by the impact site, the properties of the incident atom…
The pulsed plasma polymerization of allyl alcohol was employed under the aspect of maximal retention of OH groups and the formation of a regular polymer structure. It should be noted that earlier investigations on plasma polymers deposited from allyl alcohol did not show extensive postplasma addition of oxygen and wat…
A theoretical model is suggested which describes the formation of cracks at grain boundaries (GBs) containing partial (non-topological) disclinations and their dipoles in graphene. Such partial disclinations and their dipoles at GBs are associated with experimentally observed structural irregularities of real GBs in g…
pH-sensitive micelles are considered promising carriers for tumor targeted drug delivery. In this study, novel pH-sensitive star-shape copolymers of amphiphilic poly(epsilon-caprolactone)-b-poly(N, N-diethylaminoethyl methacrylate)-r-poly(N-(3-sulfopropyl)-N-methacryloxyethy-N, N-diethylammoniumbetaine) (4sPCLDEAS) ar…
A novel approach of patterning graphene on conductive surfaces based on local electrochemical reduction of graphene oxide is reported. Graphene is "written" from typical graphene oxide dispersion by applying negative potential on conductive surfaces vs. a micrometer-sized counter electrode "pen" with scanning electroc…
It was recently shown that the affinity of doubly charged, 1-3 diaminopropane (Dap(2+)) for DNA permits the growth on highly ordered pyrolitic graphite (HOPG) substrates, of plasmid DNA films, of known uniform thickness [O. Boulanouar, A. Khatyr, G. Herlem, F. Palmino, L. Sanche, and M. Fromm, J. Phys. Chem. C 115, 21…
A one-step colloidal process has been adopted to prepare silver (Ag) and silver sulfide (Ag₂S) nanocrystals, thus avoiding presynthesis of an organometallic precursor and the injection of a toxic phosphine agent. During the reaction, a layered intermediate compound is first formed, which then acts as a precursor, deco…
Alignment of nematic liquid crystals on polycarbonate films obtained with the use of solvents with different solvations is studied. Domain structures occurring during the growth on the polymer surface against the background of the initial thread-like or schlieren texture are demonstrated. It is established by optical…
Metamaterials (MTMs) have advantages to control electromagnetic (EM) waves with high flexibility. However, the application of MTMs in antennas has mainly focused on controlling the phases of EM waves (e.g., to transform spherical waves into planar waves in flat lens and Luneburg lens). In this work, we experimentally…
Silicon carbide (SiC) offers a unique opportunity to realize advanced quantum‐based devices and sensors. The role of paramagnetic defects in this material to achieve optical and spin quantum coherence control are discussed, and SiC nanostructures exhibiting optical emission due to quantum confinement associated with s…
Solids are distinguished from fluids by their ability to resist shear. In traditional solids, the resistance to shear is associated with the emergence of broken translational symmetry as exhibited by a nonuniform density pattern. In this work, we focus on the emergence of shear rigidity in a class of solids where this…
The work presents a comparative study of the effects of divalent Ba , Sr , and Pb substituents on the multiferroic properties of BiFeO 3 . The multiferroic properties of Bi 0.75 A 0.25 FeO 3 (A = Sr , Pb , Ba ) solid solution have been explained taking into account the effects of size differences and electronic config…
During the graphitization of polar SiC(0001) surfaces through thermal decomposition, a strongly bound carbon-rich layer forms at the graphene/SiC interface. This layer is responsible for the system's high electron-doping and contributes to the degradation of the electrical properties of the overlying graphene. In this…
The reaction of tetrachloroauric acid in DMF with poly(ethylene imine) (PEI) as a reducing agent yields spherical nanoparticles. Depending on the reaction conditions single gold nanoparticles or gold-PEI clusters with tunable size up to 200 nm in diameter were obtained which could serve as potential building blocks fo…
A family of Zn k O k ( k = 12, 16) cluster-assembled solid phases with novel structures and properties has been characterized utilizing a bottom-up approach with density functional calculations. Geometries, stabilities, equation of states, phase transitions, and electronic properties of these ZnO polymorphs have been…
Arc discharge single-walled carbon nanotubes (SWCNTs) possess superlative optical and electronic properties that are of high interest for technologically important applications including fiber optic communications, biomedical imaging, and field-effect transistors. However, as-grown arc discharge SWCNTs possess a mixtu…
A diverse range of drug delivery vehicles have been developed to specifically target chemotherapeutics to solid tumours while avoiding systemic dose-limiting toxicity. Many of these active targeting strategies display limited efficacy because they rely on subtle differences in expression patterns between pathogenic ti…
Controlling water adhesion is important for superhydrophobic surfaces in many applications. Compared with numerous researches about the effect of microstructures on the surface adhesion, research relating to the influence of surface chemical composition on the surface adhesion is extremely rare. Herein, a new strategy…
Herein we describe a platform technology for the synthesis and characterization of partially aminated, (35)S-labeled, dendritic polyglycerol sulfate (dPG(35)S amine) and fluorescent dPGS indocarbocyanine (ICC) dye conjugates. These polymer conjugates, based on a biocompatible dendritic polyglycerol scaffold, exhibit a…
Four new doubly bridged Cd(II)-azido complexes derived from sterically hindered NNN- and NN-donors were synthesized and structurally characterized. The tridentate amine ligands 2-methylquinolyl-2(ethyl-2-pyridyl)-methylamine (Meepmqa) and bis(2-methylypyridyl)methylamine (MeDPA) afforded the dinuclear complexes [Cd 2…