Materials Literature
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Hollow NiFe2O4 nanoparticles are synthesized by self-templating process utilizing coupled interfacial chemical reactions and Kirkendall effect between the core (Ni33Fe67) and the shell (NiFe2O4) of the core/shell structure. Reaction temperature and time dependent structural and morphogical transformations are presente…
Well-defined silver dendritic nanostructures have been prepared in large quantities in an ambient environment using formed activated carbon (FAC) only. A reasonable mechanism (step 1: reduction by surface reductive groups; step 2: growing in the form of a galvanic cell) is suggested.
A hierarchical nanoporous polymer film was fabricated through exponentially growing layer-by-layer assembly of weak polyelectrolytes without any template and post-treatment to greatly enhance loading capacity, release time and linear release range with pH-dependence for small molecules over the reported weak polyelect…
Fibers stripped of from the bamboo culm by longitudinal cutting are being considered as reinforcement of polymer composites owing to environmental benefits related to their biodegradable and renewable characteristics. The manual cutting process allows bamboo fibers with different diameters to be extracted from the cul…
We report the synthesis of a soluble perylene imide benzimidazole (PIBI) and its structural, thermotropic, optical and electrochemical characterization with emphasis on discotic liquid crystalline properties.
The photoluminescence of a series of Eu(3+) doped layered silicates (kanemite, octosilicate, magadiite and kenyaite) was examined; it was found that layer thickness affected the luminescence intensity, suggesting the possible effects of the spatial separation of Eu(3+) in the direction perpendicular to silicate sheets…
We report the direct determination of surface enthalpies for nanophase TiO2 anatase with different morphologies derived from drop solution calorimetry in a molten sodium molybdate (3Na2Oŀ4MoO3) solvent at 702 °C. The energetics of surface hydration has been measured using a Calvet microcalorimeter coupled with a gas d…
Chromogenic materials can be used in ‘smart’ windows to modify the incoming visible light and solar energy in buildings as well as for other see-through applications. Electrochromic (EC) windows seem to be ready for large-scale applications to provide energy efficiency and indoor comfort. This chapter attempts to give…
Circulatory vascular diseases, especially those arising from atherosclerosis, are the predominant cause of mortality and morbidity in the developed world. Current therapies include the use of autologous vessels or synthetic materials as vessel replacements. The limited availability of healthy vessels for use as bypass…
The effect of surface plasmon resonance (SPR) on the blinking emission of photoluminescence from noble metal nanostructures still requires further investigation in quantum mechanics and limits their applications. We investigate one photon luminescent emission intermittency of noble metal nanostructures with differentl…
Diffusion of Ti through the TiO(2)(110) rutile surface plays a key role in the growth and reactivity of TiO(2). To understand the fundamental aspects of this important process, we present an analysis of the diffusion of Ti ad-species at the stoichiometric TiO(2)(110) surface using complementary computational methodolo…
Crystalline cellulose nanofibrils from cotton were used as reducing agents for the synthesis of nanostructured silver. The hydrothermal synthesis involved heating an AgNO3 solution containing suspended cellulose nanofibrils at 80 °C for 2 h. The formation of metallic silver was verified using UV/Visible spectroscopy,…
Particle-stabilized liquid foams provide a general route for producing low-density macroporous materials from melt-processable and intractable thermoplastic polymers. In this paper, we demonstrate how these liquid foams can be used to design macroporous polymers with tailored microstructures and properties by adjustin…
A numerical methodology for evaluating the three-phase boundary length (TPBL) in sintered composite solid oxide fuel cell electrodes is developed. Three-dimensional models of a representative volume element of sintered composite electrodes are generated for which the mean particle diameter, composition, and total poro…
A simple, yet general coating method to plasma treated polymeric substrates is presented. The method is based on electrostatic interactions between the surface functionalized nanoparticles and the charged substrate and leads to stable and solvent resistant multilayer coatings. The coatings render polypropylene (PP) hy…
We perform a systematic numerical study of the effects of the particle-size ratio R ≥ 1 on the properties of jammed binary mixtures. We find that changing R does not qualitatively affect the critical scaling of the pressure and coordination number with the compression near the jamming transition, but the critical volu…
The vast majority of matrices used in microencapsulation are spherical. This geometry has some drawbacks due to its low surface/volume ratio: for example the difficult diffusion of oxygen to the bulk of a cell-containing microbead may lead to hypoxia or necrosis of the encapsulated cells. Here we focused on toroidal m…
Despite the recognition of the importance of Spiropyran (SP)–Merocyanine (MC) photochromic materials in molecular switching, the majority of studies have been reported in solution with relatively few in the solid-state as required in modern displays and other devices. In contrast, the present work bridges solution, co…
We present a time-resolved absorption study on the light-induced generation of reversible linkage NO isomers in single crystals of Na(2)[Fe(CN)(5)NO] x 2 H(2)O using laser pulses of 160 fs width. Using the pump wavelength lambda = 500 nm the singlet-singlet (1)A(1)-->(1)E excitation induces the NO rotation by about 90…
Nitro-nitrito photoisomerisation is investigated in solid samples and solutions of trans-[Ru(py)(4)(NO(2))(2)]. Using light of wavelength 325 nm 50% of the N-bound Ru-NO(2) ligands can be switched to the O-bound Ru-ONO configuration (nitrito-N to nitrito-O isomerisation) at temperatures below T = 250 K in solids. The…