Materials Literature
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The capacitance–voltage ( C – V ) characteristics of surface-stabilized ferroelectric liquid crystal (SSFLC) cells doped with zinc oxide nanocrystals (nc-ZnO) have been studied and fitted to the Preisach model to reveal the behaviours of dipolar species. To explain the experimental results, we propose a physical pictu…
Impurity effects on the stability of a charge-ordered antiferromagnetic state in electron-doped manganite ${\text{La}}_{0.4}{\text{Ca}}_{0.6}{\text{MnO}}_{3}$ are investigated by doping Ru for Mn. Our results show that Ru doping at a tiny level of $\ensuremath{\sim}2%$ is sufficient to suppress significantly the charg…
High-resolution thermal expansion measurements of single crystalline ${\text{BaFe}}_{1.84}{\text{Co}}_{0.16}{\text{As}}_{2}$ and ${\text{BaFe}}_{1.77}{\text{Co}}_{0.23}{\text{As}}_{2}$ in the temperature range $5<T<300\text{ }\text{K}$ are reported. The thermal expansion is highly anisotropic, with the largest e…
Thermal decomposition of graphite oxide into nanocarbons at pressures from ambient to 5 GPa has been studied by using X-ray diffraction, Raman spectroscopy and TEM. The temperature of graphite oxide decomposition at 5 GPa is close to the temperature of graphite oxide exfoliation at ambient pressure; however, materials…
Ni–Zn ferrite films with high resonance frequency in the gigahertz range deposited by magnetron sputtering at room temperature, Guo, Dangwei, Zhang, Zhengmei, Lin, Min, Fan, Xiaolong, Chai, Guozhi, Xu, Yan, Xue, Desheng
Self-assembling aromatic dipeptides are among the smallest known biological materials which readily form ordered nanostructures. The simplicity of nanotube formation makes them highly desirable for a range of bionanotechnology applications. Here, we investigate the application of the atomic force microscope as a therm…
Synchrotron-based X-ray photoemission electron microscopy (X-PEEM) was used to study the adsorption of human serum albumin (HSA) to polystyrene-polylactide (40:60 PS-PLA, 0.7 wt %) thin films, annealed under various conditions. The rugosity of the substrate varied from 35 to 90 nm, depending on the annealing condition…
The strongly polarized light scattering of gold nanorods at their longitudinal plasmon frequency allows for the tracking of single gold nanorod lateral positions and orientations via optical dark-field microscopy. We monitor both lateral and rotational diffusion of polymer-coated gold nanorods attached to artificial b…
In this paper, ZnS one-dimensional (1D) nanostructures including tetrapods, nanorods, nanobelts, and nanoslices were selectively synthesized by using RF thermal plasma in a wall-free way. The feeding rate and the cooling flow rate were the critical experimental parameters for defining the morphology of the final produ…
We present x-ray powder diffraction (XRPD) and neutron-diffraction measurements on the slightly underdoped iron-pnictide superconductor ${\text{Ba}}_{1\ensuremath{-}x}{\text{K}}_{x}{\text{Fe}}_{2}{\text{As}}_{2}$, ${T}_{c}=32\text{ }\text{K}$. Below the magnetic-transition temperature ${T}_{m}=70\text{ }\text{K}$, bot…
The reaction of Cr(C(6)H(6))(2) and 1,2,4,5-tetracyanopyrazine (TCNP) forms [Cr(C(6)H(6))(2)][TCNP], and TCNP is reduced and forms the eclipsed pi-[TCNP](2)(2-) dimer. Diamagnetic [TCNP](2)(2-) has an intradimer separation of 3.14(2) A. The intradimer C...C and N...N separations are 3.29(2) and 3.42(2) A, respectively…
Abstract Molecular construction : Concentration and/or solvent polarity changes modify the subtle balance of the attractive non‐covalent forces involved in the self‐assembly of a rectangular amphiphile. These changes allow the construction of supramolecular architectures ranging from hollow vesicles of different sizes…
In situ transmission electron microscopy has revealed unprecedented detail in the growth of platinum nanocrystals.
Transforming an organic/inorganic hybrid material into a pure inorganic material without losing its original structure is of interest for a range of applications. In this work, a simple and effective vapor phase hydrothermal method was developed to transform a 3D honeycomb structured PS/TTIP hybrid film into a photoac…
Clay aerogels, ultra low density materials made via a simple freeze-drying technique, have shown much promise in broad applications because of their low densities, often in the same range as silica aerogels (0.03-0.3 g/cm(3),) but suffering from low mechanical strength. A bioinspired approach to mineralize an active p…
X-ray absorption near-edge spectroscopic (XANES) measurements of the Fe and Co K-edges for a series of Brownmillerite-type transition-metal oxides (A 2 B′ x B 2− x O 5; A = Ca, Sr; B′/B = Al, Mn, Fe, Co) have been made. In these compounds, the metal atoms are present in both octahedral and tetrahedral coordination env…
A series of water-soluble fluorescent dendritic compounds composed of phenylene-ethynylene repeating units and anionic carboxylate or cationic ammonium peripheral groups were synthesized. The first generation fluorescent dendrimer containing nine phenylene-ethynylene units and six carboxylate peripheral groups exhibit…
Abstract Amphiphilic, biodegradable block glycopolymers based on poly(ε‐caprolactone) (PCL) with various pendent saccharides were synthesized by combination of ring‐opening polymerization (ROP) and “click” chemistry. PCL macroinitiators obtained by ROP of ε‐caprolactone were used to initiate the ROP of 2‐bromo‐ε‐capro…
Metallic nanostructures show interesting optical properties due to their plasmonic resonances, and when arranged in three-dimensional (3D) arrays hold promise for optical metamaterials with negative refractive index. Towards this goal a simple, cheap, and parallel method to fabricate large-area, ordered arrays of 150-…
Fuel retention, a crucial issue for next step devices, is assessed in present-day tokamaks using two methods: particle balance performed during shots and post-mortem analysis carried out during shutdowns between experimental campaigns. Post-mortem analysis generally gives lower estimates of fuel retention than integra…