Materials Literature
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The application of indium-free quaternary chalcogenides, such as Cu(2)ZnSnS(4) (CZTS), in photovoltaics has created tremendous interest in recent years. In this paper we develop a method to synthesize high quality CZTS nanoparticles with thermodynamically stable kesterite and wurtzite phases via a simple, one-pot, low…
Segmental and chain dynamics in nanometric (7–400 nm) layers of poly (cis-1,4-isoprene) (PI) are analyzed by Broadband Dielectric Spectroscopy (BDS) and temperature-modulated AC calorimetry. While for the segmental mode, taking place at the length scale of 2–3 polymer segments and corresponding to the dynamic glass tr…
Flexible V-O-C composite nanofibers were fabricated from solution precursors via electrospinning and were investigated as free-standing and additive-free film electrodes for supercapacitors. Specifically, composite nanofibers (V0, V5, V10 and V20) with different vanadyl acetylacetonate (VO(acac)2) contents of 0, 5, 10…
This study aims to develop novel reduction-responsive cross-linked micelles (CMs) based on poly(ethylene glycol)-block-poly(γ-propargyl-L-glutamate) (PEG-PPLG) by click chemistry. 1H NMR spectroscopy, IR spectroscopy, dynamic light scattering (DLS) and transmission electron microscopy (TEM) were performed to confirm t…
Recent studies show that polyethylenimine (PEI) benefits the hydrothermal growth of ZnO nanorod arrays due to its effect on chelating Zn(2+) ions and selectively absorbing on the crystal facets. In the present work, PEI is found to play more complex roles during the growth. The observation on the solution color and th…
Phthalonitrile polymers with amide and ortho-, meta-, and para-substituted ether linkages in the backbone were synthesized successfully and their thermal properties were investigated. The monomer building blocks for these polymers were cured without the addition of catalysts due to the self-catalyzing nature of the mo…
A versatile method for the formation of monodisperse, bridged silsesquioxane nanoparticles with hollow interiors and porous shells has been developed using silica nanospheres as templates. Tunable size and shell thickness, as well as high surface areas and large pore volumes of the hollow particles, allow for practica…
The structure and photophysical properties of a new triad (borane–bithiophene–BODIPY) 1 have been investigated. Triad 1 exhibits unprecedented tricolour emission when excited at the borane centred high energy absorption band and also acts as a selective fluorescent and colorimetric sensor for fluoride ions with ratiom…
Three lanthanide one-dimensional coordination polymers, obtained using Ln(3+) salts and croconate dianion, were structurally characterized. Magnetic studies reveal that the gadolinium analogue exhibits a large magnetocaloric effect while single-molecule magnet behaviour is observed in the dysprosium analogue.
Two types of ferrites, NiFe2O4 and ZnFe2O4 were prepared by soft mechanochemical synthesis. XRD and Raman spectroscopy were used to characterize the ferrite samples. On the basis of magnetic measurements was confirmed that the degree of inversion changes after sintering. The conduction activation energy, ΔE was determ…
Traumatic injury or surgery may trigger extensive bleeding. However, conventional hemostatic methods have limited efficacy and may cause surrounding tissue damage. In this study, we use self-assembling peptides (SAPs) and specifically extend fragments of functional motifs derived from fibronectin and laminin to evalua…
We report the biomimetic artificial silicon (Si) compound eye structures for broadband and wide-angle antireflection by integrating nanostructures (NSs) into periodically patterned microstructures (p-MSs) via thermal dewetting of gold and subsequent dry etching. The truncated cone microstructures with a two-dimensiona…
Recently, nanofibrous scaffolds have been used in the field of biomedical engineering as wound dressings, tissue engineering scaffolds, and drug delivery applications. The electrospun nanofibrous scaffolds can be used as carriers for several types of drugs, genes, and growth factors. PCL is one of the most commonly ap…
A series of magnesium silylamido complexes bearing salan-like multidentate aminophenolate ligands, [(L(1–4))MgN(SiMe3)2] (1–4) and [(L1)MgN(SiHMe2)2] (1′) (L(1–4) = –OAr1N(Me)(CH2)nN(Me)Ar2, n = 2 or 3), have been synthesized via the reaction of Mg[N(SiMe3)2]2 or Mg[N(SiHMe2)2] with 1 equiv. of the corresponding amino…
Hydrogen trap state by cementite in ferrite was investigated by ab-initio calculations. The calculated trap energy at cementite interstitial was 33 kJ/mol and that at the interface of cementite/ferrite was 39 kJ/mol. The calculated activation energy of the migration over the stable interstitial sites is 55 kJ/mol. Con…
We report a facile approach to synthesizing low generation poly(amidoamine) (PAMAM) dendrimer-stabilized gold nanoparticles (Au DSNPs) for in vivo computed tomography (CT) imaging applications. In this study, amine-terminated generation 2 PAMAM dendrimers were employed as stabilizers to form gold nanoparticles via a s…
Well-crystallized, ultra-long VO2 (A) nanorods were synthesized using a facile high-temperature mixing method (HTMM) under hydrothermal conditions. The as-obtained products were characterized by X-ray diffraction, field-emission scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectr…
Mesoporous alumina can serve as a framework for metal doping to form a novel nanocomposite. However, the nature of metal doping in amorphous mesoporous Al2O3 (aMA) is still obscured at the atomic level. This paper reports the one-pot synthesis of Cu-doped amorphous mesoporous alumina. Density functional theory calcula…
Emission enhancement at 2.7 mu m is observed in Er3+/Pr3+-codoped germanate glasses when pumped by a 980-nm laser diode. Significant reductions in 1.5-mu m emission and upconversion intensity indicate efficient energy transfer between Er3+ and Pr3+; the energy transfer efficiency is as high as 77.4%. The mechanisms of…
Utilization of hydrogen gas (and carbon dioxide) from methanol steam reforming reaction directly without CO post-treatment to supply proton exchange membrane fuel cells for mobile applications is an attractive option. CuZnGaOx based mixed oxides prepared by co-precipitation are found to be active as catalysts for the…