Materials Literature
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Enzyme-responsive protein nanocapsules are synthesized to release their protein cargoes in response to specific enzymes secreted in certain cellular events with both specificity and with a controlled rate by composition tuning. The unique nanocapsule structures protect the encapsulated proteins during hydrogel synthes…
We demonstrate the possibility to tune the electronic transport properties of graphene mono-layers and multi-layers by functionalisation with fluorine. For mono-layer samples, with increasing the fluorine content, we observe a transition from electronic transport through Mott variable range hopping (VRH) in two dimens…
Surface state localization and hybridization on B, Mg, and Li terminated MgB${}_{2}$(0001) surfaces are studied within density functional theory (DFT). For the B terminated surface we find a low energy B ${\ensuremath{\sigma}}_{1}$ surface state, a $s{p}_{z}$ surface state, and B ${\ensuremath{\sigma}}_{2}$ and ${\ens…
We report the detection of unusual superconductivity up to 49 K in single crystalline CaFe(2)As(2) via electron-doping by partial replacement of Ca by rare-earth. The superconducting transition observed suggests the possible existence of two phases: one starting at 49 K, which has a low critical field < 4 Oe, and the…
Aiming at the development of new architectures within the context of the quest for strongly luminescent materials with tunable emission, we utilized the propensity of the robust bimetallic clusters [Au₂Ag₂(R(I)/R(II))₄] (R(I) = 4-C₆F₄I, R(II) = 2-C₆F₄I) for self-assembly through aurophilic interactions. With a de novo…
In chiral magnets without inversion symmetry, the magnetic structure can form a lattice of magnetic whirl lines, a two-dimensional skyrmion lattice, stabilized by spin-orbit interactions in a small range of temperatures and magnetic fields. The twist of the magnetization within this phase gives rise to an efficient co…
We study the thermoelectric properties of three-dimensional topological insulators with many holes (or pores) in the bulk. We show that at high density of these holes, the thermoelectric figure of merit, ZT, can be large due to the contribution of the conducting surfaces and the suppressed phonon thermal conductivity.…
An effective Hamiltonian technique is used to investigate the effect of applying curled electric fields on physical properties of stress-free BiFeO(3) dots being under open-circuit electrical boundary conditions. It is discovered that such fields can lead to a control of not only the magnitude but also the direction o…
Specific heat, magnetic torque, and magnetization studies of LiCoPO${}_{4}$ olivine are presented. They show that a unique set of physical properties of LiCoPO${}_{4}$ leads to the appearance of features characteristic of two-dimensional Ising systems near the N\'eel temperature ${T}_{N}$ = $21.6$ K and to the appeara…
1,7-Dihalogenated boron dipyrromethene dyes were successfully synthesized and substituted, thus providing an entry to the final, elusive reactivity pattern. The spectroscopic properties of 1,7-disubstituted BODIPY dyes were studied and are discussed as a function of their structure.
We report a solution-based synthesis of monodispersed Cu(2)CdSnSe(4) nanocrystals and a study on the thermoelectric properties of these wide-band-gap dense materials compacted from nanocrystals for the first time. With the help of copper dopants and selenium vacancies generated during wet-chemistry synthesis, a large…
Calculations of formation energies and charge transition levels of defects routinely rely on density functional theory (DFT) for describing the electronic structure. Since bulk band gaps of semiconductors and insulators are not well described in semilocal approximations to DFT, band-gap correction schemes or advanced…
Oscillators omitted: A self-assembled inclusion complex between a LnIII[12-metallacrown-4]23+ sandwich motif (green and bronze) and a [24-metallacrown-8] (purple) is stable in methanol. The YbIII complex has a large quantum yield (0.89 %) and luminescent lifetime (14 μs) in methanol, which are attributed to the exclus…
Quenched Ge–Sb–Te (GST) compounds exhibit strongly disordered metastable structures whose average structure corresponds to a distorted rocksalt type with trigonal symmetry. Depending on the composition and thermal treatment, the metrics remain more or less pseudocubic. The corresponding stable phases show regular sequ…
Nature is a school for human beings. Learning from nature has long been a source of bioinspiration for scientists and engineers. Multiscale structures are characteristic for biological materials, exhibiting inherent multifunctional integration. Optimized biological solutions provide inspiration for scientists and engi…
Abstract Controlling liquid adhesion is a fundamental issue in many applications for special wettable surfaces. Compared to superhydrophobic surfaces of different water adhesion, superoleophobic surfaces of controllable oil adhesion are much more practical, as it leads to non‐wetting for both water and oil. However, p…
Shaped and dimpled: Silver nanocrystals enclosed by concave surfaces and thus high-index facets have been prepared by simply controlling the growth habit of Ag cubic seeds. Four types of concave nanocrystals, including octahedron, cube, octapod, and trisoctahedron, were obtained (see picture).
Self-compensation, the tendency of a crystal to lower its energy by forming point defects to counter the effects of a dopant, is here quantitatively proven. Based on a new theoretical formalism and several different experimental techniques, we demonstrate that the addition of 1.4 \ifmmode\times\else\texttimes\fi{} 10$…
An overview of the behavior of Fe-based superconductors (FBSs) in magnetic fields is given with the emphasis on the materials features important for pinning of vortices, critical current densities, melting of the vortex structures and the upper critical fields. We also discuss how the multiband electronic structure of…
BACKGROUND: Degeneration of xenografts or homografts is a major cause for reoperation in young patients after pulmonary valve replacement. We present the early results of fresh decellularized pulmonary homografts (DPH) implantation compared with glutaraldehyde-fixed bovine jugular vein (BJV) and cryopreserved homograf…