Materials Literature
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Using thermally evaporated cesium carbonate (Cs2CO3) in an organic matrix, we present a novel strategy for efficient n-doping of monolayer graphene and a ∼90% reduction in its sheet resistance to ∼250 Ohm sq(-1). Photoemission spectroscopy confirms the presence of a large interface dipole of ∼0.9 eV between graphene a…
We report a density-functional theory (DFT)-based study of the interface of bulk water with a prototypical oxide surface, MgO(001), and focus our study on the often-overlooked surface electric field. In particular, we observe that the bare MgO(001) surface, although charge-neutral and defectless, has an intense electr…
In nature, the fibrils of awns can make an open–close motion in response to humidity changes.
A novel pressure sensor has been developed by taking advantage of the orientational dependence of localized surface plasmon resonance of gold nanorods embedded in a polymer matrix. This stress-responsive material can be used to record the distribution and magnitude of pressure between two contacting surfaces by output…
A peroxidase-like catalyst was constructed through the self-assembly of histidyl bolaamphiphiles coordinated to Mn(2+) ions. The prepared catalyst exhibited oxidation activity for the organic substrate o-phenylenediamine (OPD) in the presence of hydrogen peroxide (H2O2). The histidyl bolaamphiphiles of bis(N-alpha-ami…
Red-emission enhancement of the CaAlSiN 3 :Eu 2+ phosphor by partial substitution for Ca 3 N 2 by CaCO 3 and excessive calcium source addition.
Differential dynamic microscopy (DDM) was used to investigate the diffusive dynamics of nanoparticles of diameter 200-400 nm that were strongly confined in a periodic square array of cylindrical nanoposts. The minimum distance between posts was 1.3-5 times the diameter of the nanoparticles. The image structure functio…
The synthesis, structural characterization and magnetic properties of a 1D zig-zag coordination polymer based on a cation-cation [(U(V)O2)Mn(II)] repeated unit are reported; it shows single chain magnet (SCM) behaviour with a high energy barrier of 122 K.
Magnetic resonance imaging (MRI) is an excellent imaging modality. However the low sensitivity of the technique poses a challenge to achieving an accurate image of function at the molecular level. To overcome this, contrast agents are used; typically gadolinium based agents for T1 weighted imaging, or iron oxide based…
The strength-ductility tradeoff has been a common long-standing dilemma in materials science. For example, superplasticity with a tradeoff in strength has been reported for Cu50Zr50 nanoglass (NG) with grain sizes below 5 nm. Here we report an improvement in strength without sacrificing superplasticity in Cu50Zr50 NG…
The present article reports on the one-step rapid green synthesis of water-soluble, fluorescent carbon nanodots (C-dots) with a quantum yield of 8.9%.
Incorporation of surface-based capacitances ( C / S ) simulated by Helmholtz models with pore size distribution obtained from the non-local density functional theory precisely predicts the double-layer capacitance of distinct forms of carbon.
Artemisinin (ART) is a natural drug with potent anticancer activities related with Fe(2+) mediated cleavage of the endoperoxide bridge in ART. Herein, we reported that Mn(2+) could substitute for Fe(2+) to react with ART and generate toxic products, inducing a much higher anticancer efficiency. On this basis, we prepa…
The synergistic deployment of the effects of temperature and carrier concentration raises the ZT of SnS to a high value (1.61 ± 0.02).
An impurity defect level formed by interstitial zinc at the surfaces of undoped ZnO nanoparticles plays a crucial role for d0 ferromagnetism.
Density functional theory calculations were used to investigate the mechanism of acetylene hydrochlorination separately catalyzed by un-doped B 12 N 12 and carbon-doped BN fullerene (B 12−n N 11+n C ( n = 0, 1)).
Silica and iron oxide nanoparticles with sizes ranging from 6 to 40 nm were functionalized with trehalose. The trehalose-conjugated nanoparticles showed strong interactions with Mycobacterium smegmatis (M. smegmatis) and minimal interactions with macrophage (RAW 264.7) or A549 cells. In addition, trehalose-conjugated…
We report an Al-doped hexagonal boron nitride nanosheet as a new adsorbent for mercaptans.
Thermal stability of Sb-doped Mg 2 Si 0.3 Sn 0.7 was studied by changing the heat treatment conditions (atmosphere, coating, temperature, and time).
A new multifunctional benzoxazine monomer Azo-COOH-Py BZ includes an azobenzene unit, a carboxylic acid group, and a pyrene moiety.