Materials Literature
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We describe a method for the synthesis of multigram amounts of silica nanoparticles which are controllably hydrophobized to different extents using a room temperature vapor phase silanization process. The extent of hydrophobization of the particles can be adjusted by changing the amount of dichlorodimethylsilane reage…
A single-source molecular precursor [Ba 4 Hf 2 (μ 6 -O)(μ 3,η 2 -OR) 8 (μ-OR) 2 (μ-ROH) 4 Cl 4 ] (ROH = CH 3 OCH 2 CH 2 OH) for mixed-metal oxide materials was prepared via elimination of the cyclopentadienyl ring from Cp 2 HfCl 2 as CpH, in the presence of Ba(OR) 2 in an alcohol ROH as a source of protons. The precur…
The crystal structures of two proteins, a putative pyrazinamidase/nicotinamidase from the dental pathogen Streptococcus mutans (SmPncA) and the human caspase-6 (Casp6), were solved by de novo arsenic single-wavelength anomalous diffraction (As-SAD) phasing method. Arsenic (As), an uncommonly used element in SAD phasin…
The successful design of new biodegradable, renewable resource plastics as replacements to commodity barrier plastics would benefit from an accurate measurement of sorption and diffusion of liquids. In this study, the diffusion of liquid water in amorphous polylactide [PLA] and a PLA graft copolymer, poly(1,5-cyclooct…
This book concentrates on the luminescence and structural properties of the new generation of europium and terbium activated phosphors, associated phenomena, and related topics, from basic principles to the most recent discoveries. It summarizes the present state of the art in this rapidly growing field. The authors d…
The electrochemical oxidation of an acetone solution containing [Mn(III) (5-MeOsaltmen)(H(2)O)](2)(PF(6))(2) (5-MeOsaltmen(2-) = N,N'-(1,1,2,2-tetramethylethylene)bis(5-methoxysalicylideneiminate)) and (NBu(4))[Ni(dmit)(2)] (dmit(2-) = 2-thioxo-1,3-dithiole-4,5-dithiolate) afforded a hybrid material, [Mn(5-MeOsaltmen)…
This chapter contains sections titled: Introduction Cellular Aspects of Biomineralization Crystallography Composition Stereom Architecture The Fossil Record Summary
We report on the fabrication of well-defined polymer-protein bioconjugates with varying chain architectures, including star polymers, star block copolymers, and heteroarm star copolymers through the specific noncovalent interaction between avidin and biotinylated synthetic polymer precursors. Homopolymer and diblock p…
Novozym 435-catalyzed ring-opening polymerization (ROP) of trimethylene carbonate (TMC) with telechelic hydroxylated poly[( R )-3-hydroxybutyrate] [PHB-diol; M n = 3000 g/mol (GPC)] as initiator gave di-block poly(HB- co -TMC) with different weight percents of the blocks and M n of 4400–8700 g/mol (GPC) in 54–89% yiel…
We study adiabatic quantum pumping in bilayer graphene where two-barrier potentials are weakly modulated as pumping parameters. Comparing the results with those for a normal quantum pump of non-chiral quasiparticles, we find that the chirality of quasiparticles in bilayer graphene heavily affects the pumped current th…
In this work, the influence of glycols on the glycolysis process and the properties of obtained polyurethanes were investigated. The glycolysates were produced via glycolysis of waste polyurethane foam in the reaction with one of the following glycols: 1,3-propanediol, 1,5-pentanediol, and 1,6-hexanediol.The reactions…
Pigment particles used in paper coatings are typically of micrometer size and consequently the thickness of the coatings is, even at its lowest, in micrometer scale. Progress in nanotechnology has given way to the development of nanosized materials to be used in coatings, yet their exploitation has not been studied to…
Densely packed polysaccharide brushes consisting of α-D-glucose residues were grafted from modified silicon substrates. Potato phosphorylase was herein used to grow linear polysaccharide chains from silicon tethered maltoheptaose oligosaccharides using glucose-1-phosphate as donor substrate. The combined use of potato…
We study zigzag graphene nanoribbons with periodic edge roughness and report significant band gap opening. Interestingly, such nanoribbons have a near-midgap state with a small band width. We extensively study the electronic structure and the electric-field modulation of the conduction/valence bands and the near-midga…
Abstract A novel type of reduction‐sensitive graft copolymers, chitosan‐ S ‐S‐poly(ε‐caprolactone) (CS‐ S ‐S‐PCL, here ‐ S ‐S‐ means PCL was conjugated onto chitosan backbone through disulfide linkage), was synthesized through a convenient route using dithiodipropionic anhydride (DTDPA) as a disulfide donor. Reaction…
The ligand N,N'-bis(2-pyridylmethyl)-bis(ethylacetate)-1,2-ethanediamine (debpn) coordinates divalent transition metal ions in either a pentadentate or hexadentate fashion. The coordination number correlates with the ionic radius of the metal ion, with larger cations being heptacoordinate as assessed by solid-state an…
Six new precursors for lead sulfide nanoparticles were synthesized by the reaction of lead acetate, with picolinic (Hpic), 2,6-dipicolinic (H 2 dipic) or salicylic (H 2 sal) acid followed by the addition of thiourea (tu) or thiosemicarbazide (ths). The compounds are “[Pb(Hsal) 2 (tu) 2 ]” ( 1a ), “Pb(Hsal) 2 (ths) 3 ·…
The backings of 90 black electrical tapes were analyzed to evaluate the chemical components of these films, the ability of individual techniques to discriminate samples, and the ability of the techniques combined to distinguish samples. The techniques utilized and their respective discrimination results were stereomic…
The formation and growth of amyloid fibrils was investigated using coarse-grained molecular dynamics simulations. In particular, we studied the assembly of amylin(20–29) peptides, preassembled into protofibril fragments. The systems consisted of 27 protofibril fragments initially distributed onto a regular cubic grid…
Upconversion nanoparticles (UCNs) are nanoparticles that are excited in the near infrared (NIR) region with emission in the visible or NIR regions. This makes these particles attractive for use in biological imaging as the NIR light can penetrate the tissue better with minimal absorption/scattering. This paper discuss…