Materials Literature
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The in situ formation of prototypes of complex hybrid organic structures gives the opportunity to characterize their morphologic and spectroscopic properties, a mandatory step toward the development of more reliable and efficient organic devices. In this context, a proper functionalization of the substrate’s surface i…
We have fabricated optical absorbers based on heterostructures composed of thick metallic films and truncated all-dielectric photonic crystals. Under the tunneling mechanism, the light can enter the heterostructure without reflection and is greatly absorbed due to the strong local-field enhancement in the metallic fil…
A density functional theory study of the decomposition of methanol on Cu(4) and Co(4) clusters is presented. The reaction intermediates and activation barriers have been determined for reaction steps to form H(2) and CO. For both clusters, methanol decomposition initiated by C-H and O-H bond breaking was investigated.…
The crack patterns generated in a real ceramic plate and in a plate stacked by ceramic slabs under quenching are experimentally studied. The results here reveal that there are some distinct differences between the two crack patterns. The reasons that caused the differences are the size and boundary effects of the slab…
This paper describes and demonstrates a method for the hydroelastic tailoring of flexible composite marine propeller blades. This method is applicable to situations in which the propeller's shape adapts to changing flow conditions due to its rotation in a spatially varying wake, resulting in improved efficiency when c…
We investigate the cascade decay mechanism for ultrafast intersystem crossing mediated by the spin-orbit coupling in transition-metal complexes. A quantum-mechanical description of the cascading process that occurs after photoexcitation is presented. The conditions for ultrafast cascading are given, which relate the e…
A one-step parallel grafting strategy is presented to readily prepare multifunctional complex macromolecules and miktoarm polymer brushes. Typically, a series of amphiphilic “sliding supramolecular polymer brushes” (SSPBs) were synthesized with cyclodextrin-based polyrotaxanes (PRs) as backbones. The amphiphilicity of…
Chitosan, a deacetylated product of chitin, has been demonstrated to lower cholesterol in humans and animals. However, chitosan is not fully soluble in water which would influence absorption in the human intestine. In addition, water-soluble chitosan (WSC) has higher reactivity compared to chitosan. The present study…
Nanoparticles can form unique cavity-like structures in core-shell type assemblies of block copolymers through the cooperative self-assembly of nanoparticles and block copolymers. We show that the self-assembly behavior is general for common as-synthesized alkyl-terminated nanoparticles for a range of nanoparticle siz…
Inorganic layered materials can form hollow multilayered polyhedral nanoparticles. The size of these multi-wall quasi-spherical structures varies from 4 to 300 nm. These materials exhibit excellent tribological and wear-resisting properties. Measuring and evaluating the stiffness of individual nanoparticle is a non-tr…
Solvent effects on the spectroscopic and photophysical properties of tris{[p-(N,N-dimethylamino)phenylethynyl]duryl}borane (TMAB) and tris[(phenylethynyl)duryl]borane (TPhB) were studied in detail. Both TMAB and TPhB exhibited broad and structureless absorption and fluorescence bands ascribed to the charge transfer (C…
A novel photosensitive C-PNIPAAm comprising hydrophilic PNIPAAm conjugated with a relatively short but very hydrophobic coumarin part was designed and prepared using a coumarin-containing disulfide derivative (C-S-S-C) as transfer agent in the presence of Bu(3)P and water. It was found that C-PNIPAAm can form polymer…
Although surgery offers the only hope of cure for hepatocellular carcinoma (HCC), patients with inoperable or metastatic disease have a dismal prognosis. Therefore, there is an urgent need for new and effective treatment strategies. Polymeric micelles composed of drug conjugated to a diblock copolymer have attracted g…
A solution gated field effect transistor has been fabricated on epitaxial single-layer graphene on 6H-SiC(0 0 0 1). Output and transfer characteristics were systematically studied as a function of electrolyte pH. The transfer characteristics of the device show a pH dependent shift of 19 ± 1 mV/pH. From the minimum she…
The inhibition of xanthene (XEN) on the corrosion of mild steel in 0.5 M H2SO4 was studied by gravimetric and UV–visible spectrophotometric methods at 303–333 K. Results obtained show that XEN act as inhibitor for mild steel in H2SO4 solution. The inhibition efficiency was found to increase with increase in XEN concen…
The phase behavior of ABC star triblock copolymers is examined using real-space self-consistent mean-field theory. The central part of the triangular phase diagram for ABC triblock copolymers with equal A/B, B/C, and C/A interactions is determined by comparing the free energy of a number of candidate ordered phases. I…
This paper reports the crystal structure and photoluminescence properties of Ca 9 La 1− x (VO 4 ) 7 : x Eu 3+ ( x =0–1) phosphors synthesized at various temperatures (850°–1350°C) in air for 12 h using traditional solid‐state reaction method. Rietveld refinement of powder X‐ray diffraction pattern of Ca 9 Eu(VO 4 ) 7…
Palladium nanoparticles have uniformly been electrodeposited on a Au nanoisland template (NIT) supported on a Si(100) substrate, which exhibits Au-rich, Pd-rich, and/or polycrystalline mixed structures upon annealing to 700 °C. Glancing-incidence X-ray diffraction (GIXRD) and energy-dispersive X-ray (EDX) elemental an…
Recently, silver, a traditional broad-spectrum antiseptic, drew increasing attentions as a solution against antibiotic resistant bacteria. Various synthetic polymers and nature polymers were applied to form silver polymer composites to cope with the defects (e.g., low hemocompatibility) of silver-loaded antimicrobial…
In this paper, studies of aqueous electrolyte solutions in contact with a family of porous carbon geometries using classical molecular dynamics simulations are presented. These simulations provide an atomic scale depiction of ion transport dynamics in different environments to elucidate power of aqueous electrolyte su…