Materials Literature
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Compounds of isotactic polypropylene (iPP) and β-nucleating agent were used to investigate the relationship between the development of β phase and molecular weight in iPP under quiescent crystallization conditions by using wide angle X-ray diffraction and differential scanning calorimetry techniques. In all cases, the…
1 nm CuO quantum dots (QDs) were produced in size-controlled super-micropores of a silica matrix. The reversible color change of the QDs from pale blue to deep green was clearly observed in a wide temperature range from 298 to 673 K. This particular thermochromism is ascribed to an enhanced bandgap shift depending on…
Phase pure bismuth ferrite (BiFeO3) thin films with (001)-oriented epitaxial structure are realized on lanthanum strontium manganite (La0.67Sr0.33MnO3) buffered (001)-SrTiO3 substrates by chemical solution deposition. The annealing process is optimized such that a stoichiometric precursor can be used to accurately con…
Three dihalogenic solvents differing in the length of alkyl chain (1,2-dichloroethane, 1,4-dichlorobutane, and 1,6-dichlorohexane) with three Friedel-Crafts alkylation catalysts varying in reactivity (AlCl3 , FeCl3 , and SnCl4 ) have been used to prepare hypercrosslinked poly(styrene-co-vinylbenzyl chloride-co-divinyl…
In this article, the influence of organic-modified montmorillonite (Fe-OMT) on smoke-suppression properties and combustion behavior of flame-retardant epoxy (FREP) was investigated intensively. A series of intumescent FREPs (IFREPs) with different content of Fe-OMT were prepared based on EP resin as matrix resin, ammo…
We report an innovative method to explore the optimal experimental settings to detect light atoms from scanning transmission electron microscopy (STEM) images. Since light elements play a key role in many technologically important materials, such as lithium-battery devices or hydrogen storage applications, much effort…
Although there have been a number of publications focused on heterogeneous of NO2 on mineral particles, most of these studies were focused on β-Al2O3 and performed in the dark. Less was known about the reaction process of NO2 on α-Al2O3, especially the effect of sunlight factor. The heterogeneous reaction between NO2…
Abstract Eine Bottom‐up‐Methode zur Synthese stabiler und monodisperser Graphensegmente mit Stickstoff‐dotierten Zickzackkanten wird vorgestellt. Auf Grundlage des bisher unbeschriebenen Dibenzo‐9a‐azaphenalens (DBAPhen) als molekularer Baustein wird ein allgemein anwendbares Konzept zur Synthese ausgedehnter Nanograp…
Heat transport in nanoscale systems is both hard to measure microscopically, and hard to interpret. Ballistic and diffusive heat flow coexist, adding confusion. This paper looks at a very simple case: a nanoscale crystal repeated periodically. This is a popular model for simulation of bulk heat transport using classic…
A microstrip method with vector network analyzer was used to investigate electric field control of magnetic dynamic properties in Co/Pb(Mg1/3Nb2/3)O3-PbTiO3 heterostructure at room temperature. Under external electric field, the natural resonance frequency and permeability of the Co film were found to modulate between…
The third-order optical nonlinearity and response time of Au nanobipyramids have been investigated by using optical Kerr effect technique. Large third-order nonlinear optical susceptibility (χ(3)) and ultrafast optical response time have been obtained at the longitudinal surface plasmon resonance (LSPR) wavelength. As…
The converse piezoelectric effect in collagen type II fibrils, the main collagen constituent in cartilage, was investigated using piezoresponse force microscopy. The fibrils exhibited shear piezoelectric behavior similar to that previously reported in collagen type I fibrils and followed the same cantilever-fibril ang…
ABSTRACT Polymers are one of the important pillars of our current society. Besides the great success a matter is the accumulation of huge amounts of end‐of‐life polymers. Current waste management bases primarily on landfills, thermal recycling, and down‐cycling. Noteworthy, only a small part of the end‐of‐life materia…
The mechanism by which polymers, when grafted to inorganic nanoparticles, lower the interfacial tension at the oil-water interface is not well understood, despite the great interest in particle stabilized emulsions and foams. A simple and highly versatile free radical "grafting through" technique was used to bond high…
BACKGROUND: Currently, there has been extensive research interest for inorganic nanocrystals such as calcium phosphate, iron oxide, silicone, carbon nanotube and layered double hydroxide as a drug delivery system especially in cancer therapy. However, toxicological screening of such particles is paramount importance b…
This work presents the graphoepitaxy of high-χ block copolymers (BCP) in standard industry-like lithography stacks and their transfer into the silicon substrate The process includes conventional 193 nm photolithography, directed self-assembly of polystyrene-block-polydimethylsiloxane (PS-b-PDMS) and pulsed plasma etch…
We investigated film thickness dependence of domain size and transport property in ${\mathrm{VO}}_{2}$ thin films on rutile ${\mathrm{TiO}}_{2}$ (001) substrates and identified formation mechanism of the microscaled domain. It was found that domain size decreased with increasing film thickness and the domain boundary…
P/As substitution effects on the transport properties of polycrystalline ${\mathrm{LaFeP}}_{1\text{\ensuremath{-}}x}{\mathrm{As}}_{x}{\mathrm{O}}_{1\text{\ensuremath{-}}y}{\mathrm{F}}_{y}$ with $x$ = 0--1.0 and $y$ = 0--0.1 have been studied. In the F-free samples $(y$ = 0), a superconducting (SC) dome with a maximum…
N-Salicylidene pyrene derivatives of the common formula 1-pyrene-NCH–(2-OH-aryl) [aryl = C6H4 (1), 5-Cl-C6H3 (2), 5-Br-C6H3 (3), 5-NO2-C6H3 (4), 3,5-Cl2-C6H2 (5), 3,5-Br2-C6H2 (6), and 3-CH3O-C6H3 (7)] have been synthesized and characterized by elemental analysis, NMR, diffuse reflectance and fluorescence spectroscopy…
We present a direct-write chemical technique for controlling the charge state of near-surface nitrogen vacancy centers (NVs) in diamond by surface fluorination. Fluorination of H-terminated diamond is realized by electron beam stimulated desorption of H2O in the presence of NF3 and verified with environmental photoyie…