Materials Literature
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YPO4 and ErPO4 hollow mesocrystal cubes were successfully synthesized using PVP as additive to modify the crystallization of YPO4 and ErPO4. The time-dependent TEM images revealed that the as-formed nanocubes covered in PVP self-assembled into big mesocrystal cubes via oriented attachment firstly, followed by the ripe…
Polypropylene nanocomposites containing silica nanospheres based on the sol‐gel methods were produced via in situ polymerization using a rac‐Et(Ind) 2 ZrCl 2 /methylaluminoxane (MAO) system. Two different routes were used depending on the interaction between the silica nanoparticles with the catalytic system. In route…
This article is the fourth in a series describing the setup and use of NIST DTSA-II. The previous articles may be viewed in the Microscopy Today archives at www.microscopy-today.com . Part I of this article described how to use DTSA-II to quantify an energy dispersive X-ray spectrum from a material of unknown composit…
SH-functionalized SBA-15 was synthesized and gold nanoclusters were grafted inside its channels. Different portions of such gold-containing material were subjected to a variety of thermal treatments, including calcination in the 300-560 °C temperature range and further treatments under a hydrogen atmosphere at diverse…
The crystal structures and magnetic properties were investigated experimentally and theoretically for two S = ½ spin chain complexes, which consist of [M(mnt)(2)](-) (M = Pt for 1 or Pd for 2) with 1-(4'-bromo-2'-flurobenzyl)-4-aminopyridinium (1-BrFBz-4-NH(2)Py(+)). The 1-BrFBz-4-NH(2)Py(+) cations exhibit different…
The main physical ideas behind the development of the novel solid-state cooling system have been summarized. The basic strategy relies on strengthening of the electrocaloric effect. We show that for this purpose additional piezoelectric layers or new multiferroic materials can be used as a practical realization. Moreo…
A flow-type microreactor containing glutaminase-mesoporous silica composites with 10.6 nm pore diameter (TMPS10.6) was developed for the continuous synthesis of theanine, a unique amino acid. High enzymatic activity was exhibited by the local control of the reaction temperature.
CuInS(2) nanorod array structures are synthesized via a template-free and non-vacuum route for the first time. The obtained CuInS(2) thin films show promising conversion efficiency in a two-electrode photoelectrochemical cell.
Several commercially available separators as well as novel ultraporous electrospun nonwovens were evaluated in mild aqueous supercapacitor cells, using conventional electrochemical techniques. A special laboratory test-cell was designed and fabricated to accurately control the pressure applied to the stack. It was sho…
We have found that a group of shape memory polymers in the polyurethane family can be recycled for new use when their parent polymeric chains are fabricated with a small percentage of polyethylene glycol, and the products are subsequently reprocessed in N,N-dimethylformamide (DMF), a very commonly used organic solvent.
Reaction of a mixture of CuCl, PhSnCl(3) and PEt(2)Ph with S(SiMe(3))(2) in THF resulted initially in the unexpected synthesis of the ionic, mixed copper-tin sulfide cluster [Li(thf)(4)][Cu(19)S(28)(SnPh)(12)(PEt(2)Ph)(3)] in low yields. However, by adding NBu(4)Cl to the reaction solutions we were able to selectively…
Herein we report a facile method for the preparation of hierarchical silica nanostructures through a biomimetic approach. Toward this goal, a protein-directed approach has been proposed to template silica into 3D architectures through a hydrogel matrix formed from physically cross-linked fibrinogen. The hydrogel matri…
Widespread research over the past five decades has provided a wealth of experimental data and insight concerning the shock hardening, damage evolution, and the spallation response of materials subjected to square-topped shock-wave loading profiles. However, fewer quantitative studies have been conducted on the effect…
Micelles formed from amphiphilic copolymers are promising materials for the delivery of drug molecules, potentially leading to enhanced biological properties and efficacy. In this work, new poly(ester amide)-poly(ethylene oxide) (PEA-PEO) graft copolymers were synthesized and their assembly into micelles in aqueous so…
Metal amidoborane ammoniates are a new type of promising hydrogen storage material consisting of metal cation, [NH2BH3]− anionic unit and NH3 ligand. Herein, we report a new reactive ball milling approach for preparation of magnesium amidoborane ammoniate, Mg(NH2BH3)2(NH3)3. Our study found that mechanically milling t…
We have demonstrated a simple method for the synthesis of large area and mono- to few-layer graphene on a nickel foil. A cellulose acetate laminate film was coated on a nickel foil as a solid carbon source. Compared to previous synthesis methods using solid carbon sources, the mentioned carbon source can be easily coa…
Aluminosilicates with well-ordered MCM-48 mesostructures were synthesized by one step and two step methods. Single step method was found to be appropriate for metal incorporation. This method was applied to synthesize transition and inner transition metal incorporated MCM-48. These modified MCM-48 materials were chara…
A large n-type thermopower of −73 μV K−1 was observed at high temperatures (1100 K) for the first time in the mixed valence (Mn3+/Mn4+) spinel oxide LiMn2O4. The absence of a Jahn–Teller distortion leads to an electronic degeneracy ratio of 10/4 rather than 5/4 in the Heikes formula for the spin degeneracy contributio…
Mode coupling theory (MCT) has had notable successes in addressing the rheology of hard-sphere colloidal glasses, and also soft colloidal glasses such as star-polymers. Here, we explore the properties of a recently developed MCT-based schematic constitutive equation under idealized experimental protocols involving sin…
Recombinant Escherichia coli JM109 harbouring the polyhydroxyalkanoate (PHA) biosynthesis gene (phaCABco) of Comamonas sp. EB172, an acid tolerant microbe, was examined for the production of PHAs from various carbon sources. The study demonstrated that the recombinant E. coli JM109 had the potential to utilize both su…