Materials Literature
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In order to elucidate the stabilization mechanism of CutA1 from Pyrococcus horikoshii (PhCutA1) with a denaturation temperature of nearly 150 degrees C, GuHCl denaturation and heat denaturation were examined at neutral and acidic pHs. As a comparison, CutA1 proteins from Thermus thermophilus (TtCutA1) and Oryza sativa…
We report on the synthesis of novel, unconventional beta-Ga(2)O(3) tubes via a Sn nanowire template process using thermal decomposition and oxidation of SnO and GaN powder mixtures. Distinctly different from any previously reported nano- and microtubes, the present beta-Ga(2)O(3) tubes display a flattened and thin bel…
Fluorescence upconversion spectroscopy has been performed on high-quality, low size dispersion CdSe nanocrystals synthesized using the CdO precursor with tri- n -octylphosphine oxide and hexadecylamine cosurfactants. These measurements reveal that an increase in nanocrystal diameter, from 25 to 60 Å, is accompanied by…
Abstract Highly ordered mesoporous TiO2 materials, exhibiting crystalline frameworks and various mesostructures, have been successfully obtained via nanoreplication using various kinds of mesoporous silicas as the rigid templates.
We have synthesized high-purity double-walled carbon nanotubes (DWCNTs) by an arc-discharge method in hydrogen ambient. The DWCNTs were synthesized using a mixture of Fe catalyst and FeS promoter. Without FeS promoter, we only obtained single-walled carbon nanotubes (SWCNTs). The synthesized DWCNTs had outer diameters…
Mesoporous polymer nanofibers were prepared by degrading sacrificial domains of block copolymers (BCPs) infiltrated into porous alumina. Surface-induced ordering influences the formation of the mesoscopic morphology in porous alumina with pore diameters 1 order of magnitude larger than the BCP period. In smaller pores…
The spontaneous self-assembly of II−IV stabilizer depleted nanoparticles (NPs) into nanowires (NWs) is a complex process that is only partially understood. This paper examines the mechanism governing changes in the growth pattern of CdTe NWs that are induced by the addition of dimethyl sulfoxide (DMSO) to the NW growt…
We present a simple and versatile technique of tailoring functionalized surface structures for protein enrichment and purification applications based on a superhydrophobic silicone nanofilament coating. Using amino and carboxyl group containing silanes, silicone nanofilament templates were chemically modified to mimic…
The effect that montmorillonite clay has on the burning rate of high impact polystyrene (HIPS) is examined. Two clays are considered a pristine montmorillonite (MMT-Na+) and a montmorillonite clay intercalated with triphenyl phosphite (TPP). In addition to the burning rate tests, mechanical, impact and rheological pro…
Members of a novel glycerate-2-kinase (GK-II) family were tentatively identified in a broad range of species, including eukaryotes and archaea and many bacteria that lack a canonical enzyme of the GarK (GK-I) family. The recently reported three-dimensional structure of GK-II from Thermotoga maritima (TM1585; PDB code…
ADVERTISEMENT RETURN TO ISSUEPREVCommunication to the...Communication to the EditorNEXTSynthesis of High Molecular Weight Poly(phthalazinone ether)s by Ullmann C−N and C−O Condensation ReactionsJinyan Wang, Yan Gao, Antisar R. Hlil, and Allan S. HayView Author Information Department of Chemistry, McGill University, 80…
This work investigated the effects of the nanometer-sized curvature of the substrate on the structure of organic monolayers supported on dispersed and porous solids. A series of covalently attached monolayers (CAMs) was prepared via solution-phase reactions of C n H 2 n +1 Si(CH 3 ) 2 N(CH 3 ) 2 ( n = 1–30) with well-…
Mechanical properties of metal-polymer matrix composites were investigated experimentally. High density polyethylene (HDPE), polypropylene (PP), and polystyrene (PS) were used as the polymer matrix and Fe powder in 5, 10, and 15 vol% was used as the metal. The modulus of elasticity, yield and tensile strength, % elong…
Bimagnetic FePt/CoFe 2 O 4 nanoparticles having a bricklike morphology were synthesized by growing a soft magnetic CoFe 2 O 4 phase on FePt cubic nanoparticle seeds. The size of the soft phase could be controlled by tuning the material ratio of the FePt seeds to the CoFe 2 O 4 component. To obtain magnetic hardening,…
The beneficial entropic effect, which may be expected from the connection of three tridentate binding units to a strain-free covalent tripod for complexing nine-coordinate cations (Mz+ = Ca2+, La3+, Eu3+, Lu3+), is quantitatively analyzed by using a simple thermodynamic additive model. The switch from pure intermolecu…
This paper reports the synthesis of alkali-free layered nickel oxides with a highly swollen hydrate structure, derived from NaNiO 2 through soft-chemical processes involving oxidation with bromine and subsequent acid treatment. Complete removal of interlayer Na + ions and subsequent hydration yielded a single phase of…
Gold nanoparticles in the range of 5−6 nm were synthesized by the reduction of gold(III) chloride trihydrate by sodium borohydride (SBH) in the presence of newly synthesized mono-6-deoxy-6-pyridinium-β-cyclodextrin chloride (p-βCD). NMR, mass spectroscopy, and UV−vis spectroscopy illustrated that SBH would simultaneou…
The LaFe(13)-(x)Si(x) (1.0 < or = x < or = 5.0) series is studied experimentally and theoretically to gain possible understanding for the relationships among geometrical structure, chemical composition, magnetic behavior, and physical properties as related to the magnetocaloric effect in these compounds. As the Si con…
Gold nanoparticles functionalized with chromophores are known to present unpredictable fluorescence as a function of their structure. Odd-even effects, based on the number of methylene units of the chain to which the fluorophore is attached, and the nature of the anchoring group on the gold surface have, in the past,…
In this paper, we have prepared of a topography/chemical composition gradient polystyrene (PS) surface, i.e., an orthogonal gradient surface, to investigate the relationship between surface wettability and surface structure and chemical composition. The prepared surface shows a one-dimensional gradient in wettability…