Materials Literature
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A high electric field impedance experiment on supercooled molecular liquids is employed to transfer energy to the slow modes by absorption from the field and detect the increase of their "configurational temperature", T(cfg), via the change of the relaxation times. This allows us to determine the configurational heat…
Highly ordered mesoporous carbons have been synthesized from a direct triblock-copolymer-templating process of organic–organic self-assembly. The organic precursors are phenol, formaldehyde, and a functional monomer of p -fluorophenol, and the organic structure directing agent is triblock copolymer Pluronic F127. Char…
Electron transmission through insulating polymer nanocapillary (diameter $200\phantom{\rule{0.3em}{0ex}}\mathrm{nm}$ and aspect ratio 50) foils has been investigated for incident energies 500 and $1000\phantom{\rule{0.3em}{0ex}}\mathrm{eV}$. Significant intensities of transmitted electrons were observed for foil tilt…
Homo- and heterodinuclear Yb/Yb and Gd/Gd or Yb/Al and Gd/Al helicates are obtained from 8-hydroxyquinoline-derived ligands and metal ions in a potassium-templated self-assembly process. X-ray structural investigations reveal an unusual π-type coordination of the template to a vinylic unit. The compounds show high sta…
The valence state change of BiNiO3 perovskite under pressure has been investigated by a powder neutron diffraction study and electronic-state calculations. At ambient pressure, BiNiO3 has the unusual charge distribution Bi(3+)(0.5)Bi(5+)(0.5)Ni(2+)O3 with ordering of Bi(3+) and Bi(5+)charges on the A sites of a highly…
Manifestation of $\mathrm{Co}∕\mathrm{Mn}$ ordering on the spin-lattice dynamics of ${\mathrm{La}}_{2}\mathrm{Co}\mathrm{Mn}{\mathrm{O}}_{6}$ (LCMO) double perovskites is studied by Raman spectroscopy. We investigate the temperature dependence of the magnetic and the optical properties for (i) microcrystals containing…
Abstract Methods for the layer‐by‐layer deposition of oppositely charged polymers on surfaces can be used to assemble thin multilayered films using a broad range of natural, synthetic, and biologically relevant materials. These methods also permit precise, nanometer‐scale control over the compositions and internal str…
The extreme technological complexity associated with continued dimensional scaling of the photolithographic patterning process to sub-50 nm dimensions has forced the semiconductor industry to seek increasingly innovative alternative approaches. One unconventional method under preliminary consideration involves using s…
Internalization and subcellular localization in HeLa cells of gold nanoparticles modified with the SV40 large T antigen were quantified using inductively coupled plasma optical emission spectroscopy (ICP-OES). Internalization was monitored as a function of incubation time, temperature, nanoparticle diameter, and large…
The fast electric-field-induced phase transition from blue phase III (BPIII) to nematic (N) phase of a newly designed chiral liquid crystal possessing molecular biaxiality (see figure) is reported. The present finding can offer fast electro-optical switching between a well black state of the BPIII and a homogeneous br…
The ability to deliver highly efficient therapeutic compounds specifically to diseased sites is crucial for effectively treating all human illnesses. Unfortunately, conventional therapeutic strategies require unnecessarily high systemic administration due to non-specific biodistribution and rapid metabolism of free dr…
A novel strategy for the synthesis of hierarchical porous carbon is presented here based on the spinodal phase separation of mesophase pitch, which acts as a carbon precursor, and a soft polymer template. A continuous macropore structure and mesopores are obtained upon carbonization, as shown in the figure. The materi…
It is generally believed that superconductivity and magnetism are two antagonistic long-range phenomena. However, as it was preliminarily highlighted in D. Stamopoulos et al. [Phys. Rev. B 75, 014501 (2007)] and extensively studied in this work under specific circumstances these phenomena instead of being detrimental…
We report on the sensing mechanism of electrical detection of deoxyribonucleic acid (DNA) hybridization for Au- and Cr-contacted field effect transistors based on single-walled carbon nanotube (SWCNT) networks. Barrier height extraction via low-temperature electrical measurement provides direct evidence for the notion…
Abstract Fluorescent CdTe quantum dots (QDs) can be dispersed into poly(vinyl alcohol) (PVA) solid nanofibers by electrospinning of a QD–PVA blend solution. Although solution blending methods usually cause phase separation as the solvent evaporates; here, attractively, the QDs do not aggregate, on the contrary, they a…
We present and discuss the results of calculations of surface relaxations and rumplings for the (001) and (011) surfaces of $\mathrm{Ba}\mathrm{Ti}{\mathrm{O}}_{3}$ and $\mathrm{Pb}\mathrm{Ti}{\mathrm{O}}_{3}$ using a hybrid B3PW description of exchange and correlation. On the (001) surfaces, we consider both $A\mathr…
Experiments show that bubbles covered with monodisperse polystyrene particles, with particle to bubble radius ratios of about 0.1, evolve to form faceted polyhedral shapes that are stable to dissolution in air-saturated water. We perform Surface Evolver simulations and find that the faceted particle-covered bubble rep…
Recently, it was demonstrated that the quasiparticle dynamics, the layer-dependent charge and potential, and the c -axis screening coefficient could be extracted from measurements of the spectral function of few layer graphene films grown epitaxially on SiC using angle-resolved photoemission spectroscopy (ARPES). In t…
A simple strategy to tailor the surface of nanoparticles for their specific adsorption to and localization at block copolymer interfaces was explored. Gold nanoparticles coated by a mixture of low molecular weight thiol end-functional polystyrene (PS-SH) (Mn = 1.5 and 3.4 kg/mol) and poly(2-vinylpyridine) homopolymers…
A novel structure of catalyst, submonolayer Pt-decorated Au, has been synthesized with minimal use of Pt and shows markedly improved activity toward formic acid oxidation where it facilitates the direct oxidation of formic acid by suppressing the formation of poisonous species COads via the "ensemble" effect.