Materials Literature
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Access to multifunctionality at the nanoscale requires the development of hybrid nanostructures that combine materials of different natures. In this line of thought, current research on coordination polymers is not only focusing on their synthesis at the nanoscale, but also on combining these polymers with other mater…
We report significant changes of optical conductivity (${\ensuremath{\sigma}}_{1}$) in single-layer graphene induced by mild oxygen plasma exposure and explore the interplay between carrier doping, disorder, and many-body interactions from their signatures in the absorption spectrum. The first distinctive effect is th…
In this study, we synthesized one type of biocompatible and biodegradable cross-linked star poly(ε-caprolactone)–poly(ethylene glycol) (c-4sPCL–PEG) with an excellent temperature memory effect (TME) by photo-cross-linking of cinnamon group terminated four arms poly(ε-caprolactone) (4sPCL–CA) and cinnamon group termina…
We systematically study the surface energies and surface relaxations of various low-index and high-index Mg surfaces. It is found that low-index surfaces are not necessarily stable as Mg(1 0 ¯ 0) is the most unstable surface in the series of Mg(1 0 ¯ 1 n) (n = 0–9). A surface-energy predicting model based on the bond…
This paper is an attempt to compare the influence of various annealing conditions on growth, nanostructure, surface morphology and electrical properties of copper oxide thin films. Cu thin films of 85 nm thickness were deposited on glass substrate by thermal evaporation method, and then post-annealed at different envi…
The presence of size effects represented by a small nanoscale on torsional wave propagation properties of circular nanostructure, such as nanoshafts, nanorods and nanotubes, is investigated. Based on the nonlocal elasticity theory, the dynamic equation of motion for the structure is formulated. By using the derived eq…
Whereas the atomic structure of surface of crystals is known to be distinct from that of bulk, experimental evidence for thickness-induced structural transitions in amorphous oxides is lacking. We report the NMR result for amorphous alumina with varying thickness from bulk up to 5 nm, revealing the nature of structura…
The interplay between orbital, charge, spin, and lattice degrees of freedom is at the core of correlated oxides. This is extensively studied at the interface of heterostructures constituted of two-layer or multilayer oxide films. Here, we demonstrate the interactions between orbital reconstruction and charge transfer…
We present a study of optical and dc properties of a highly frustrated organic conductor $\ensuremath{\kappa}$-(BEDT-TTF)${}_{2}$Hg(SCN)${}_{2}$Cl in the 300--10 K temperature range. At temperatures above 30 K, the material shows properties of a half-filled metal with strong electron-electron correlations. At 30 K, th…
Economical fabrication of waterproof/breathable substrates has many potential applications such as clothing or improved medical dressing. In this work, a facile and reproducible fabrication method was developed to render the Janus property to arbitrary porous substrates. First, a hydrophobic surface was obtained by de…
High temperature shape memory polymers (SMP) were prepared from metal salts of a sulfonated poly(ether ether ketone) ionomer, M-SPEEK, using cations of varying valence from one to four. The ionomers were prepared by neutralizing a SPEEK with 18 mol % sulfonation (ion exchange capacity = 0.60 mequiv/g) with Na +, Zn 2+…
Reported here is a new hybrid macrocycle, cyclo[1]furan[1]pyridine[4]pyrrole (1), that bears analogy to the previously reported mixed heterocycle system cyclo[2]pyridine[4]pyrrole (2) and cyclo[6]pyrrole 3, an all-pyrrole 22 π-electron aromatic expanded porphyrin. The oxidized, dianionic form of 1, [1 - 4H](2-), has b…
Pair distribution function analysis of in situ total scattering data recorded during formation of WO3 nanocrystals under hydrothermal conditions reveal that a complex precursor structure exists in solution. The WO6 polyhedra of the precursor cluster undergo reorientation before forming the nanocrystal. This reorientat…
Perovskite-type structures (ABO3) have received significant attention because of their crystallographic aspects and physical properties, but there has been no clear evidence of a superconductor with a double-perovskite-type structure, whose different elements occupy A and/or B sites in ordered ways. In this report, hy…
The exchange-bias effects in the mosaic epitaxial bilayers of the itinerant ferromagnet (FM) SrRuO3 and the antiferromagnetic (AFM) charge-ordered La(0.3)Sr(0.7)FeO3 were investigated. An uncharacteristic low-field positive exchange bias, a cooling-field driven reversal of positive to negative exchange-bias and a laye…
This review summarizes synthetic strategies for the preparation of asymmetric phthalocyanines and their analogues. Cross-condensation between two phthalonitrile components, crosscondensation between one phthalonitrile and one non-nitrile component, targeted synthesis of AABB-type compounds, the subphthalocyanine ring-…
This communication presents a technique to re-direct the radiation beam from a planar antenna in a specific direction with the inclusion of metamaterial loading. The beam-tilting approach described here uses the phenomenon based on phase change resulting from an EM wave entering a medium of different refractive index.…
Mastery of nanomaterial structure enables the control of its properties to enhance its performance for a given application. Herein, we demonstrate a fast and facile self-assembly method for the synthesis of a series of Co3 O4 @CeO2 core@shell cubes, which are characterized by SEM, TEM, XRD, inductively coupled plasma…
This work developed biodegradable nanofibrous drug-eluting membranes that provided sustained release of metformin for repairing wounds associated with diabetes. To prepare the biodegradable membranes, poly-d-l-lactide-glycolide (PLGA) and metformin were first dissolved in 1,1,1,3,3,3-hexafluoro-2-propanol (HFIP) and w…
Mg and its alloys become natural biomaterials as the elemental Mg is found in the human body in abundance and their mechanical properties being akin to the natural bone as well as due to their inherent bioabsorbable/bioresorbable property. This paper discusses the development of new Mg alloys and their corrosion chara…