Materials Literature
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Single-phase hollow poly( o -anisidine) colloidal spheres with uniform sizes were directly synthesized in dilute aqueous solution of o -anisidine in the presence of a small amount of an initiator, cupric acetate or basic cupric bromide, Cu 2 (OH) 3 Br, under hydrothermal conditions. The void volume and size of hollow…
Silicon carbide films with different carbon concentrations x(C) have been synthesized by inductively coupled plasma chemical vapor deposition from a SiH(4)/CH(4)/H(2) gas mixture at a low substrate temperature of 500 °C. The characteristics of the films were studied by x-ray photoelectron spectroscopy, x-ray diffracti…
Hyperbranched poly(ferrocenylphenylenes) ( hb -PFPs) with high molecular weights were synthesized by the copolycyclotrimerizations of ( E, E )-1,1‘-bis[2-(4-ethynylphenyl)vinyl]ferrocene ( 1 ) with ( E )-1-[2-(4-ethynylphenyl)vinyl]ferrocene ( 2 ) catalyzed by TaCl 5 −Ph 4 Sn at room temperature in high yields (up to…
Nanorods based on the use of small-chain organic ligands as capping agents are synthesized. Neither strong ligands, such as phosphonic acids, nor high concentrations of the reactants are required. Favored crystallization along the c-axis in the wurtzite crystals results in nanorod formation (see image). Longer ligands…
A series of novel In 2 O 3 nano/microstructures, namely, nanocubes, truncated nanocubes, and multipods, were controllably synthesized by the thermal evaporation of metallic In grains at 850 °C. The crystalline structure and morphologies of the In 2 O 3 products were characterized using X-ray diffraction, field-emissio…
Abstract In this study, porous three‐dimensional (3‐D) materials were prepared with the regenerated Antheraea pernyi ( A. pernyi ) silk fibroin by freeze‐drying from a lithium thiocyanate solution of its fibers. The relationship between preparation conditions and morphological structures of 3‐D materials was also stud…
The long and short of it: An ionic liquid with good thermal stability can be prepared from 100–500-nm-long multi-walled carbon nanotubes (MCNTs). The MCNTs are functionalized with a polysiloxane quaternary ammonium compound followed by a sulfonate salt. A coating of average thickness 6.5 nm comprising an ionic bilayer…
The limited penetration of cytotoxic drugs into tumors is a significant contributing factor to the limited effectiveness of cancer chemotherapy. Here we have shown that X-ray fluorescence microtomography is a suitable technique for imaging the distribution of Pt drugs within multicellular tumor spheroids, models of so…
Diffuse x-ray data for mixed-stack organic charge-transfer crystals approaching the neutral-ionic phase transition can be quantitatively explained as due to the softening of the optical phonon branch. The interpretation is fully consistent with vibrational spectra, and underlines the importance of electron-phonon coup…
A novel soft chemical synthesis of Ni 1- x Al x nanoparticles (0.09 ≤ x ≤ 0.50) by cohydrogenolysis of [Ni(cod) 2 ] ( 1 ) with [(AlCp*) 4 ] ( 2 ) or with [(Me 3 N)AlH 3 ] ( 3 ) in nonaqueous solution is presented (cod = 1,5-cyclooctadiene, Cp* = 1,2,3,4,5-cyclopentadienyl). The treatment of equimolar amounts of 1 and…
The V(TCNE){x}, x approximately 2 is an organic-based amorphous ferrimagnet, whose magnetic behavior is significantly affected in the low field regime by the random magnetic anisotropy. It was determined that this material has thermally reversible persistent change in both magnetization and conductivity driven by the…
We describe a technique to synthesize DNA homopolymers on a surface using surface-initiated enzymatic polymerization (SIEP) with terminal deoxynucleotidyl transferase (TdTase), an enzyme that repetitively adds mononucleotides to the 3'-end of oligonucleotides. The thickness of the synthesized DNA layer was found to de…
Growing up: By optimizing the use of surfactants, CdS nanowires originating from either zinc blende- or wurtzite-structured seeds are grown in solution (see image). The aspect ratio of the nanowires can be tuned by varying the temperature. This simple and straightforward synthetic route may open a new door to the bott…
Composite structures of p-type mesoporous silicon and polyaniline have been fabricated by a one-step electrochemical polymerization process. The composite structure shows good conduction properties and new, intense photoluminescence emission bands that are assigned to polyaniline that penetrates and fulfills the entir…
Doped nanophosphor samples of ZnS:Mn, ZnS:Mn, Co and ZnS:Mn, Fe were prepared using a chemical precipitation method. Photoluminescence (PL) spectra were obtained and lifetime studies of the nanophosphors were carried out at room temperature. To the best of our knowledge, there are very few reports on the photoluminesc…
Free-standing polymer (poly(methyl methacrylate) or cyclic olefin copolymer) nanopillar and nanotube ensembles with previously unreported, ultrahigh aspect ratios (300 to >1600) were fabricated via anodic aluminum oxide (AAO) template-based methods that utilize a dilute, aqueous H3PO4 template etchant followed by free…
Water-soluble infrared-to-visible fluorescent LaF(3) nanocrystals doped with different lanthanide ions (Er(3+)/Yb(3+), Eu(3+), Nd(3+), Tb(3+)) have been synthesized in methanol without using any ligands. These nanocrystals are easily dispersed in water, producing a transparent colloidal solution. The colloids of the E…
The microwave (MW)-assisted reaction of cadmium acetate with thiourea in N, N -dimethylformamide (DMF) was controlled by controlling the MW irradiation time in the presence of 1-thioglycerol as a capping agent. The peak position of the absorption band of the CdS nanocrystallites, dispersed in chloroform, shifts toward…
A novel and facile method for the synthesis of high molecular weight polyimides by low temperature solution polycondensation has been developed. This activated polycondensation method is based on the use in situ of both chloro(trimethyl)silane (CTMS) and a base such as pyridine (Py) as polycondensation promoters. The…
The present study demonstrates the creation of a stable, superhydrophobic surface by coupling of successive Langmuir-Blodgett (LB) depositions of micro- and nano-sized (1.5 µm/50 nm, 1.0 µm/50 nm, and 0.5 µm/50 nm) silica particles on a glass substrate with the formation of a self-assembled monolayer of dodecyltrichlo…