Materials Literature
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Natural nanoparticles are present in soils but their abundance, properties and interactions with other soil components have not been studied widely. We used an ultrasonic‐centrifugal method to disperse and extract nanoparticles from 12 soils sampled in different regions of China. Various techniques were used to study…
We perform a simplified analysis of the edge excitations of the canted antiferromagnetic (CAF) phase of the $\ensuremath{\nu}=0$ quantum Hall state in both monolayer and bilayer graphene. Namely, we calculate, within the framework of quantum Hall ferromagnetism, the mean-field quasiparticle spectrum of the CAF phase n…
Highly oriented graphene nanoribbons sheets and yarns are produced by chemical unzipping of self-standing multiwalled carbon nanotube (MWNT) sheets. The as-produced yarns - after being chemically and thermally reduced - exhibit a good mechanical, electrical, and electrochemical performance.
Because nanoparticles are finding uses in myriad biomedical applications, including the delivery of nucleic acids, a detailed knowledge of their interaction with the biological system is of utmost importance. Here the size-dependent uptake of gold nanoparticles (AuNPs) (20, 30, 50 and 80 nm), coated with a layer-by-la…
New piezoelectric ceramics, 0.71 BiFe 1− x ( Ni 1/2 Ti 1/2 ) x O 3 −0.29 BaTiO 3 +0.6 wt% MnO 2 [ BFNT x – BT ] ( x = 0–0.09), were fabricated using conventional mixed‐oxide method. It was found that the introduction of BNT into BF ‐ BT system caused insignificant change in crystal structure, which is a single‐phase p…
Beaded SiC quantum rings can be prepared by introducing a carbonization reaction at the laser-induced Si plasma and ethanol interface (referred to as reactive laser ablation). An anomalous red spectral shift is observed when the diameter of SiC nanocrystals within the SiC quantum rings is smaller than 3 nm. Experiment…
Mussel foot proteins (mfps) mediate fouling by the byssal holdfast and have been extensively investigated as models for versatile polymer-mediated underwater adhesion and coatings. However, insights into the structural properties of mfps have lagged far behind the nanomechanical advances, owing in part to the inabilit…
Fabricating vertically ordered and etchable high aspect ratio nanodomains of block copolymer (BCP) thin films on diverse substrates via continuous processing dynamic cold zone annealing (CZA) is particularly attractive for nanomanufacturing of next-generation electronics. Previously, we reported dynamic CZA studies wi…
In order to explore the structural roles of sodium in boroaluminosilicate glasses, we have designed ten Na${}_{2}$O-B${}_{2}$O${}_{3}$-Al${}_{2}$O${}_{3}$-SiO${}_{2}$ glasses with varied [Al${}_{2}$O${}_{3}$]/[SiO${}_{2}$] ratio to access different regimes of sodium behavior. Multinuclear nuclear magnetic resonance (N…
Composites are a class of material, which receives much attention not only because it is on the cutting edge of active material research fields due to appearance of many new types of composites, e.g., nanocomposites and bio-medical composites, but also because there are a great deal of promise for its potential applic…
Oil Palm Biomass Fibres and Recent Advancement in Oil Palm Biomass Fibres Based Hybrid Biocomposites
Radiation-induced ratchet electric currents have been studied theoretically in graphene with a periodic noncentrosymmetric lateral potential. The ratchet current generated under normal incidence is shown to consist of two contributions, one of them being polarization-independent and proportional to the energy relaxati…
A complete characterization is given of the possible macroscopic deformations of periodic nonlinear affine unimode metamaterials constructed from rigid bars and pivots. The materials are affine in the sense that their macroscopic deformations can only be affine deformations: on a local level the deformation may vary f…
A large family of periodic planar non-linear bimode metamaterials are constructed from rigid bars and pivots. They are affine materials in the sense that their macroscopic deformations are only affine deformations: at large distances any deformation must be close to an affine deformation. Bimode means that the paths o…
How low can you go? The visual detection of 2,4,6-trinitrotoluene and Hg2+ at the sub-zeptomole level is demonstrated. This was achieved using a hybrid material that allowed for the development of a single-particle, single-molecule detection technique, which may be the ultimate in ultra-trace sensitivity with selectiv…
BACKGROUND: Pseudomonas putida KT2440 is able to synthesize large amounts of medium-chain-length polyhydroxyalkanoates (mcl-PHAs). To reduce the substrate cost, which represents nearly 50% of the total PHA production cost, xylose, a hemicellulose derivate, was tested as the growth carbon source in an engineered P. put…
It is shown that, contrary to the naive expectation, single particle spectral gaps can be opened on the surface states of three dimensional topological insulators by using commensurate out- and in-plane antiferromagnetic or ferrimagnetic insulating thin films.
We use THz time-domain spectroscopy to investigate the far-infrared properties of vanadium dioxide thin films, strain-engineered through epitaxial growth on (100) R TiO 2 substrates. The films exhibit a large uniaxial tensile strain along the rutile c -axis. X-ray diffraction measurements reveal a structural transitio…
The structure-property relation of nanostructured Al-doped ZnO thin films has been investigated in detail through a systematic variation of structure and morphology, with particular emphasis on how they affect optical and electrical properties. A variety of structures, ranging from compact polycrystalline films to mes…
We present a local control scheme to construct the external potential v that, for a given initial state, produces a prescribed time-dependent density in an interacting quantum many-body system. The numerical method is efficient and stable even for large and rapid density variations irrespective of the initial state an…