Materials Literature
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In the last few decades, multiple H-bonded arrays have been shown to be versatile tools to prepare functional supramolecular materials. Supramolecular complexes formed by uracil (Ur) and 2,6-diamidopyridine (DAP) developed by Lehn are the first examples of multiple H-bonded systems governing the formation of supramole…
The electron work function of nickel with various grain sizes has been studied. It has been shown that the work function decreases as the specific length of grain boundaries in nickel increases with decreasing average grain size. It has been found that the transformation of grain boundaries from a nonequilibrium to eq…
The liquid to organogel transition of solutions containing new organogelator molecules of the amino-acid type is studied using rheological and differential scanning calorimetry (DSC) techniques. This paper describes the formation of the organogel as a function of the temperature for various concentrations of the organ…
The aggregation behavior and morphological characteristics of amphiphilic block copolymer polybenzyl methacrylate-block-poly(dimethylamino)ethyl methacrylate (PBzMA-b-PDMAEMA) at the air–water interface were investigated through surface pressure measurements, atomic force microscopy (AFM) imaging, electrochemical meas…
The unique optical properties, such as size-tunable absorption and emission, caused semiconductor nanocrystals to attract a great deal of interest for recent technological developments. For the evaluation of semiconductor nanocrystals as new materials for various applications like optoelectronic devices, knowledge of…
The delivery of nitric oxide (NO) has important applications in medicine, especially for procedures that involve the vasculature. We report photo-curable biodegradable poly(diol citrate) elastomers capable of slow release of NO. A methacrylated poly(diol citrate) macromonomer was prepared by polycondensation of citric…
Inorganic-salt-induced morphological evolution of GdF3 crystals was demonstrated for the first time in a mild hydrothermal process. By varying the amount of inorganic salt, the GdF3 crystals could transform from uniform elliptic nanostructures to submicroplates. The increase of ionic strength, hindered diffusion of re…
Hybrid materials combining gold nanoparticles (GNP) of variable diameter and an organic thin layer of photochromic diarylethenes were achieved. Solid-state photoswitching based on ring-closure/ring-opening reaction was carried out under alternate UV and visible irradiations. In addition to the spectral changes due to…
Two new borates [NH3(CH2)2NH(CH2)2NH3]2[B14O20(OH)6] (1) and [NH3(CH2)2NH(CH2)2NH3]2[Al2B10O20]·4H2O (2) have been synthesized in the presence of the same organic amine (diethylenetriamine) under hydro(solvo)thermal conditions. 1 is an isolated structure containing a large ring-shape polyborate cluster [B14O20(OH)6]4−…
Polymer brushes are commonly used to modify the properties of solid surfaces. Here a family of polybasic poly(2-(diethylamino)ethyl methacrylate) brushes have been grown using ARGET ATRP from a cationic macroinitiator adsorbed on two types of silica surfaces: QCM crystals and oxidised silicon wafers. The pH-response o…
Piperazine is an amine which is used both as an activator or promoter, but also as active component in CO 2 capture solvents. High concentrations are being formulated to draw benefit of the PZ properties. This results in a risk of precipitation of PZ and other solid phases during capture. It could be a benefit to the…
Microelectrochemical polarization, thermodynamic calculations, and Auger electron spectroscopy were performed to determine the predominant factors affecting the pit initiation resistance at sulfide and carbosulfide inclusions in stainless steels. TiS and Ti 4 C 2 S 2 inclusions did not dissolve in the passive or the t…
In this work, the PAMAM dendrimer self-assembles into macroscopic aggregates with a microribbon structure in aqueous solution containing ferric chloride, which are millimeters in length and micrometers in width. The microribbons have a stable structure with the thickness approaching 5 μm. Their self-assembly process a…
In this paper we report on an inter-diffusion polymerization method to encapsulate polyaniline (PANi) chains inside multiwalled carbon nanotubes (MWCNTs) based on CNT nano-porous membranes. The MWCNT's inner cavity with a diameter around 15 nm is designed to be the only path for the diffusion of the aniline monomer an…
Results on stress analysis for single-crystal diamonds are presented. Isolated crystals were studied by Raman mapping and depth profiling techniques, using confocal microscopy. Diamonds were deposited on molybdenum and tantalum by hot filament and microwave CVD methods at growth rates between 10 and 30 μm·h-1. Crystal…
We herein find that graphene oxide (GO) can enhance the fluorescence signal of conjugated polyelectrolytes (CPEs) with charge transfer characteristics under certain conditions, which is due to a relative hydrophobic environment of CPEs upon complexation with GO.
X-ray crystallography of the title complexes indicates a discrete mixed valence (Co2(II)-Co2(III)) defect dicubane molecular unit where each cobalt nucleus attains a distorted octahedral geometry. The α-diimine (L-L) chelator coordinated to each cobalt ion stops further polymerization or nuclearization. The water mole…
A gemini surfactant was used as a kinetic self-assembly template to synthesize hollow mesoporous silica nanoparticles (HMSNs). In this method, only one surfactant, one silica source of TEOS and one solvent (water) were used. This easy and general method might be applicable for the production of HMSNs with controllable…
Two novel families of dendrimers have been synthesized by hydrogen bonding between a triazine moiety (M), as an electron-transporting central core, and three peripheral dendrons of generations 1 and 2 derived from bis(hydroxymethyl)propionic acid (bis-MPA). The dendrons contain both carbazole-based groups as hole-tran…
We have developed a newly designed non-explosive release actuator that can replace currently used release devices. The release mechanism is based on a separation mechanism, which relies on segmented nuts and a shape memory alloy (SMA) wire trigger. A quite fast and simple trigger operation is made possible through the…