Materials Literature
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Abstract It is shown that 2,4,6‐triacetylphlorogucinol (H 3 tapg) can be utilized as C 3 ‐symmetric tritopic bridging ligand, that can be regarded as an annulated threefold acetylacetonate. Together with 2‐[bis(2‐hydroxyethyl)amino]ethylamine (H 2 bhea) as capping ligand the corresponding trinuclear copper complex [Cu…
PII constitutes a family of signal transduction proteins that act as nitrogen sensors in microorganisms and plants. Mycobacterium tuberculosis (Mtb) has a single homologue of PII whose precise role has as yet not been explored. We have solved the crystal structures of the Mtb PII protein in its apo and ATP bound forms…
We present a simple design of electromagnetic shields for both field expelling and field confinement. Motivated by the concept of neutral inclusions in the theory of composites, we introduce two concepts of neutral shells, and use neutral shells to construct our designs of electromagnetic shields. We also discuss the…
Abstract High‐density polyethylene (HDPE)/turmeric spent (TS) composites were prepared by the extrusion of an HDPE resin with 5, 10, 15, or 20 wt % TS. HDPE granules and TS master‐batch flakes were compounded on a corotating and intermeshing twin‐screw extruder. The extrudate strands were cut into pellets and injectio…
We present a theoretical study of the stationary photoluminescence of two, direct-gap, semiconductor nanocrystals, taking into account electronic excitation energy-transfer processes due to electrostatic interaction. The results obtained here allow for the incoherent reversible energy transport that occurs when the in…
Infrared thermography and spatially resolved capillary inlet mass spectrometry (SpaciMS) have been used to characterize propylene oxidation reactions occurring along a Pt/Al 2 O 3 monolith-supported catalyst before and after heterogeneous thermal degradation, with the heterogeneous aging being more representative of r…
The packing of electronic molecules into planar structures and an ensured pi-pi interaction within the plane are preferred for efficient organic transistors. Thin films of organic electronics are exemplar, but the widely adopted molecular design and associated fabrication lead to limited ordering in multistack constru…
Image patterns formed by low voltage aberration-corrected high resolution transmission electron microscopy (HRTEM) of few layer graphene provide insight into the number of layers present. For odd numbers of graphene layers (three layers or more) and even numbers of graphene layers, distinctly different image patterns…
The mechanism of the Suzuki-Heck (SuHe) polymerisation of 2,7-dibromo-9,9-di(n-dodecyl)fluorene (1) with potassium vinyl trifluoroborate (PVTB) for the synthesis of poly(fluorenylene vinylene)s (PFVs) has been investigated. In the first stage, a palladium-catalysed chain-growth AA/B(C)-type polycondensation occurs, as…
For the case of the NH 3 selective catalytic reduction (NH 3 -SCR) reactions over V-based and metal-exchanged zeolite catalysts, we have used step response and temperature-programmed experiments in a fixed-bed flow microreactor in order to accomplish the following. (i) Identify the adspecies and evaluate their storage…
Abstract Contrary to claims in the literature that a cluster of the composition of “Cd 10 S 4 (SPh) 12 ” was formed by thermal treatment of (NMe 4 ) 4 [Cd 10 S 4 (SPh) 16 ], experimental evidence was gathered that the core structure of the cluster is not exclusively retained and other CdS species are also formed. When…
We present the results of a facilitated kinetic Ising model based investigation of the confinement and filler-induced changes in the glass transition, fragility, and aging dynamics of a model system. This work is motivated by the issue of relationships, if any, in the glass transition phenomena of polymer nanocomposit…
κ-β′′-(BEDT-TTF)2(PO-CONHC2H4SO3) is the first stable metal containing an aminoxyl radical. The salt has both κ- and β′′-type donor sheets and exhibits metallic behavior down to 1.7 K. The magnetic susceptibility can be modeled by an alternate chain model with J1 = −0.80, and J2 = −0.69 K.
With their potential for spectacular applications, like superlensing and cloaking, metamaterials are a powerful class of nanostructured materials. All these applications rely on the metamaterials acting as a homogeneous material. We investigate a negative index metamaterial with a phase-sensitive near-field microscope…
Photoresponsive gold nanoparticles dispersed in a solid/frozen matrix provide a basis for sensors that “remember” whether the sample has ever exceeded the melting temperature of the matrix. The operation of these sensors rests on the ability to photoinduce metastable electric dipoles on NP surfaces – upon melting, the…
We report on a theoretical study of the electronic-structure and transport properties of single and bilayer graphene with vacancy defects, as well as N-doped graphene. The theory is based on first-principles calculations as well as model investigations in terms of real-space Green's functions. We show that increasing…
A series of [2]rotaxane materials, in which [60]fullerene is linked to a macrocycle and ferrocene (Fc) moieties are placed at the termini of a thread, both of which possess a central Cu(I)-1,10-phenanthroline [Cu(phen)(2)](+) complex, were synthesized by self-assembly using Sauvage metal template methodology. Two type…
Several strategies have been used to functionalize 1,3,5-trisubstituted arene-cored dendrimers with the organometallic electron-reservoir moiety [Fe(eta(5)-C(5)H(5))(eta(6)-C(6)Me(6))](+), 1, to provide dendritic multielectron reservoirs. They all start from the carboxylic acid [Fe(eta(5)-C(5)H(4)COOH)(eta(6)-C(6)Me(6…
Mixed-valence dyadic [(TTF)(2)](+*) (TTF=tetrathiafulvalene) species--the elementary building blocks of organic conductors--are usually too weakly associated to be observed in solution, unless covalently bound in dimers or physically constrained into a cage structure. We demonstrate here that a novel chiral tetrathiaf…
Nanofibrous membranes are highly soft materials with high surface-to-volume ratios, and therefore can serve as excellent carriers for therapeutic agents that are antibacterial or accelerate wound healing. This article overviews research and development of nanofibrous dressing materials for wound care, in addition to a…