Materials Literature
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In the past eight years, several examples of colloidosome microcapsules have been developed. Such microcapsules systems are offering alternative options for the encapsulation and release of active ingredients on the basis of the size exclusion properties of their colloidal membranes. Here, we use latex particles steri…
A bisporphyrin macrocycle was constructed from a porphyrin-based diyne monomer in one step through alkyne metathesis. The fullerene binding studies (C(60), C(70) and C(84)) showed the highest binding affinity of the macrocycle for C(84), which is in great contrast to its bisporphyrin four-armed cage analogue that show…
Graphite oxide (GO) was heated at 120 °C, 140 °C, 160 °C, 200 °C and 600 °C in ambient N2 gas and the heated samples were investigated by X-ray diffraction, infrared (IR) spectroscopy, thermal gravimetry (TG), differential thermal analysis (DTA), elemental analysis and cation exchange capacity (CEC) tests. It was foun…
We report on the noncovalent interactions of nanodiamond carboxylic acids derived from adamantane, diamantane, and triamantane with β- and γ-cyclodextrins. The water solubility of the nanodiamonds was increased by attaching an aromatic dicarboxylic acid via peptide coupling. Isothermal titration calorimetry experiment…
The delayed fracture characteristics of V-bearing steel were evaluated using conventional strain rate test (CSRT) and the hydrogen absorption and desorption behaviors were studied with the specimens hydrogen-charged and then exposed to air of 30°C for up to 2.5 months. CSRT was carried out at two test sites, and nearl…
Vertically aligned undoped ZnO nanorod arrays (NRAs) have been fabricated on silicon (111) substrates by radio frequency magnetron sputtering. The structural studies illustrate a hexagonal wurtzite structure of the ZnO NRAs with compressive stress. Raman analysis of the E2high phonon mode corroborates the partial rela…
Ionic liquid crystals based on quinolinium and isoquinolinium salts were prepared by quaternization of quinoline and isoquinoline, respectively. In the first place the influence of the alkyl chain on the thermal behaviour was investigated. Two types of (iso)quinolinium salts were synthesized. Long-chained (iso)quinoli…
Controlled aggregation of perylene bisimides in multiple modes has been achieved via symmetric substitution with peptides. Using optical probes of aggregation, the balance of hydrophobic and electrostatic forces are found to play a key role in directing self assembly and are exploited via solvent, pH, and specific ext…
The crystallization of PLA-silane surface-treated ZnO nanocomposites was investigated by DSC and compared to that of neat PLA. Several modes of crystallization were considered: isothermal and non-isothermal cold crystallization and also isothermal and non-isothermal melt crystallization. The kinetics of cold crystalli…
A new aqueous hybrid electrochemical capacitor consisting of a porous positive capacitive electrode and a water-stable multi-layered Li negative electrode is demonstrated. The new cell design affords cell voltages close to 4 V in a mild aqueous electrolyte. Application of a pseudocapacitive positive electrode with hig…
Metal (Au, Pt, Au@Pt) and metal oxide (TiO(2)) nanoparticles are synthesized with colloidal techniques and subsequently used as nanocrystal inks for thin films deposition. The optical properties of Au colloids are strongly influenced by both Pt and TiO(2) interfaces: while platinum causes a damping and a blue-shift of…
Active oxygen species for soot combustion with O2 on LaMnO3 were identified as O22−, O2n− (1 < n < 2) and O2m− (0 < m < 1) for the first time using in situ Raman spectroscopy during temperature-programmed oxidation (TPO) from room temperature to higher temperatures.
For the purpose of preparing liquefied graphene oxide (GO), a process consisting of sulfonation with sodium sulfanilic acid and ionization with bulky amine-terminated Jeffamine® was designed and performed. The obtained hybrid fluid is actually a supramolecular ionic liquid (SIL) with sulfonated GO as the central anion…
Process development studies are being done to recover and reuse zirconium from used nuclear fuel (UNF) zirconium alloy cladding. This has been shown to be economically viable and is a major initiative in waste reduction. The studies have included recovery processes based on dry pyrochemical iodination, chlorination, a…
A polycrystalline ceramic, a new type of complex tungsten bronze type structure, having a general formula Li2Pb2Y2W2Ti4V4O30 has been prepared relatively at low temperature using a mixedoxide technique after optimizing the calcination conditions on the basis of thermal analysis. The material has been characterized by…
Taking advantage of the negligible vapor pressure and dissolving features of ionic liquids (ILs), the solution morphology and dissolution process of cellulose in ILs have been visualized directly by conventional transmission electron microscopy (TEM) at room temperature for the first time.
The polyamic acid (PAA), which is the precursor of polyimide (PI), is synthesized by pyromellitic dianhydride (PMDA) and 4, 4'-oxidianiline (ODA). The PAA/PET composite membrane is prepared with poly (ethylene terephthalate) (PET) nonwoven by electrospinning of the solution of PAA. The final PI/PET composite membrane…
Alkyl thiols (CnH2n + 1SH) with chain lengths (n = 4, 6, 8, 12, 16) were investigated for etching the polydisperse Aun(SG)m mixture in order to obtain nearly monodisperse Au38(SR)24 clusters. FT-IR studies demonstrate that all thiol ligands bound to Au38 clusters are highly ordered and in an all-trans state. X-ray abs…
Three DSA (9,10-distyrylanthracene) derivatives, 9,10-bis(3,5-dimethylstyryl)anthracene (TMDSA), 9,10-bis(3,5-bis(trifluoromethyl)styryl)anthracene (TFMDSA) and 9,10-bis(3,5-difluorostyryl)anthracene (TFDSA) were synthesized and characterized. Here we report their crystal structures, structure-property relationships,…
Based upon comprehensive theoretical investigations and known experimental observations, we predict the existence of the double-chain planar D(2h) B(4)H(2)(1), C(2h) B(8)H(2)(3), and C(2h) B(12)H(2)(5) which appear to be the lowest-lying isomers of the systems at the density functional theory level. These conjugated a…