Materials Literature
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The synthesis of water-soluble quantum dots (QDs) in aqueous phase has received much attention recently. To date various kinds of QDs such as CdTe, CdSe, CdTe/CdS and CdSe/ZnS have been synthesized by aqueous methods. However, generally poor-quality QDs (photoluminescent quantum yield (PLQY) lower than 30%) are obtain…
Abstract We describe the taxonomy and species diversity of 35 taxa of the diatom genus Thalassiosira from a series of net plankton collected quarterly or monthly from eight locations off the Guangdong coastal waters in the South China Sea. Field samples and 14 cultured Thalassiosira clonal strains were studied by ligh…
Though the potassium (K) status of the soil often relies only on its exchangeable-K content, release from nonexchangeable K also contributes to plant nutrition. This process, as well as the opposite one, K fixation, are diffusion controlled and thus depend on time. This study was conducted to (i) assess the influence…
The growth of Al 2 O 3 onto Sn-doped In 2 O 3 (ITO) by atomic layer deposition (ALD) was studied in situ using X-ray photoelectron spectroscopy. Significant diffusion of oxygen from the substrate destroys the self-terminated monolayer adsorption of the metal precursor and results in a nominal initial growth per cycle…
Emerging new applications, e.g. as molecular logical devices and in superresolution imaging, have fuelled considerable interest in the design of improved fulgide photoswitches and the fundamental ultrafast processes that determine their photochemistry. This review is concerned with the basic photoswitching properties…
An air-stable, low-temperature, solution-based process for preparing CuInS(2) (CIS) superstrate solar cells using CdS-decorated ZnO nanorod (NR) arrays is reported. Efficient light harvesting and photoexcited charge transport were achieved by fabricating a ZnO NR window layer with a large p-n junction area via a hydro…
Abstract Optical and electronic properties of the SrAl 2 O 4 :Eu 2+ ‐Dy 3+ phosphor were investigated to analyze the mechanisms of its strong and long persistent luminescence. From the temperature dependence of photocurrent excitation spectra, the relative energy locations between the 5d levels of Eu 2+ in two differe…
A novel orange-yellow-emitting Ba(3)Gd(PO(4))(3):xEu(2+),yMn(2+) phosphor is prepared by high-temperature solid-state reaction. The crystal structure of Ba(3)Gd(PO(4))(3):0.005 Eu(2+),0.04 Mn(2+) is determined by Rietveld refinement analysis on powder X-ray diffraction data, which shows that the cations are disordered…
Novel, semicrystalline polyamides and copolyamides were synthesized from a new carbohydrate-based diamine, namely isoidide-2,5-dimethyleneamine (IIDMA). In combination with 1,6-hexamethylene diamine (1,6-HDA) as well as the biobased sebacic acid (SA) or brassylic acid (BrA), the desired copolyamides were obtained via…
This work reports on a study of the phonon behavior and thermal transport in bent graphene nanoribbons (GNRs). Three peculiar phenomena are observed in bent GNRs during thermal transport. First, due to the high thermal conductivity of flexural mode (ZM) phonons in GNRs, energy separation is observed between the in-pla…
The structure of the network forming glass GeO(2) is investigated by making the first application of the method of in situ neutron diffraction with isotope substitution at pressures increasing from ambient to 8 GPa. Of the various models, the experimental results are in quantitative agreement only with molecular dynam…
Abstract First‐principles calculations reveal that in divalent europium perovskites Eu M O 3 ( M = Ti, Zr, and Hf), antiferromagnetic superexchange interactions via n d states of the B‐site M cations ( n = 3, 4, and 5, respectively) are enhanced by rotations of the M O 6 octahedra. The octahedral rotations involved in…
Silver nanoclusters (AgNCs) have gained considerable attention over a wide range from chemical detection to bioimaging applications. Herein we developed a facile way to synthesize water-soluble, intense fluorescent targetable AgNCs with yellow-emission by using DNA via a chemical reduction method. The sequence of DNA…
There is always a considerable clinical need for vascular grafts. Considering the availability, physical and mechanical properties, and regenerative potential, we have developed and characterized readily available, strong, and compliant multilayer grafts that support cell culture and ingrowth. The grafts were made fro…
2-(Dimethylamino)ethyl acrylate (DMAEA) imparts versatile functionality to poly[Sty-b-(nBA-co-DMAEA)-b-Sty] ABA triblock copolymers. A controlled synthetic strategy minimized chain transfer reactions and enabled the preparation of high-molecular-weight ABA triblock copolymers with relatively narrow PDIs between 1.39 a…
A graphene-based superlattice formed by a periodic gap modulation is studied theoretically by using a Dirac-type Hamiltonian. Analyzing the dispersion relation, we have found that extra Dirac points arise in the electronic spectrum under certain conditions. As a result, the gap between the conduction and valence minib…
The theoretical investigation of the size dependent behavior of a Bernoulli–Euler dielectric nanobeam based on the strain gradient elasticity theory is presented in this paper. The variational principle is utilized to derive the governing equations and boundary conditions, in which the coupling between strain and elec…
Singly twisted Möbius antiaromatic [34]heptaphyrin A and doubly twisted Hückel aromatic [34]heptaphyrin B were formed by a phosphorus insertion reaction. A rearranges thermally to give the more stable B with P=O migration from NNN to NNC, and thus A is a rare case of a kinetically controlled Möbius antiaromatic molecu…
Flavins feature multiple attributes that explain their widespread occurrence in nature, including photostability, reversible electrochemistry, and especially the tunability of their optical, electronic, and redox properties by supramolecular interactions and modification of their chemical structure. Flavins are import…
Ionic self-assembly of the peptide RADARADARADARADA (RADA16-1) may form a well-defined nanofiber and eventually a hydrogel scaffold, with a water content of over 99.5%. This leads to the establishment of a nanofiber barrier that can be used to achieve complete hemostasis in less than 20 s in multiple tissues and in a…