Materials Literature
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Specific stimuli can be used to trigger the release of cargo encapsulated in polymer carriers in applications ranging from drug delivery to catalysis. Current approaches can be categorized in two classes: application of an external stimulus, such as light, and exploitation of environmental changes, such as chemical an…
Although the potent antitumor activity of nitric oxide (NO) supports its promise as an antineoplastic agent, effective and selective delivery and action on tumor and not normal cells remains a limiting factor. Nanoparticle-based delivery of NO has been considered as one approach to overcome these limitations. Therefor…
Detailed structures and thermoelectric (TE) properties are investigated for the perovskite La(1-x)Ca(x)CoO(3) and La(1-x)Sr(x)CoO(3) with 0 <or= x <or= 0.3. The monoclinic crystal structures for all samples are refined from powder X-ray diffraction, which reveals that the La(1-x)Sr(x)CoO(3) series has smaller global d…
Novel p-type semiconductors can be found in these extraordinary comb structures. The GeSe combs are selectively formed by a vaporization–condensation–recrystallization (VCR) process using bulk GeSe powder as the precursor source. They have a flat body plate part and extended wire finger parts, both of which have ident…
Mesoporous Ce(OH)CO(3) microspheres with flowerlike three-dimensional (3D) hierarchical structure were successfully synthesized via different hydrothermal systems, including glucose/acrylic acid, fructose/acrylic acid, glucose/propanoic acid, and glucose/n-butylamine systems. After Ce(OH)CO(3) microspheres were calcin…
The formation of monodisperse, tunable sized, alloyed nanoparticles of Ni, Co, or Fe with Pt and pure Pt nanoparticles attached to carbon nanotubes has been investigated. Following homogeneous nucleation, nanoparticles attach directly to nonfunctionalized single-walled and multi-walled carbon nanotubes during nanopart…
The rapid development of nanotechnology has raised some concerns about the effects of engineered nanoparticles (NPs) on human health and the environment. At the same time, NPs have attracted intense interest because of their potential applications in biomedicine. Hence, the requirement of detailed knowledge of what ta…
This paper aims at introducing new natural fibers for use as fillers in a polymeric matrix enabling production of cost-effective, biodegradable, and lightweight composites for load carrying structures. Agave (Agave americana) leaf fiber, one such kind, is rich in cellulose, relatively inexpensive, and abundantly avail…
The magnetic properties of thin-film Pd/Fe/Pd trilayers in which an embedded ~1.5 A-thick ultrathin layer of Fe induces ferromagnetism in the surrounding Pd have been investigated. The thickness of the ferromagnetic trilayer is controlled by varying the thickness of the top Pd layer over a range from 8 A to 56 A. As t…
Monte Carlo simulations at constant pressure are performed to study coexistence and interfacial properties of the liquid-solid transition in hard spheres and in colloid-polymer mixtures. The latter system is described as a one-component Asakura-Oosawa (AO) model where the polymer's degrees of freedom are incorporated…
Lattice dynamical methods used to predict phase transformations in crystals typically evaluate the harmonic phonon spectra and therefore do not work in frequent and important situations where the crystal structure is unstable in the harmonic approximation, such as the $\ensuremath{\beta}$ structure when it appears as…
To investigate the viability of cyclometalation as a general tool in the design of new sensitizers for dye-sensitized solar cells, a series of (cyclometalated) ruthenium complexes was prepared. To this purpose we have prepared the carboxylate-functionalized 2,2′:6′,2′′-terpyridine (tpy)-based tridentate ligands 4′-eth…
Direct growth of single-walled carbon nanotubes (SWNTs) on flat substrates by chemical vapor deposition (CVD) is very important for the application of SWNTs in nanodevices. In the growth process, catalysts play an important role in controlling the structure of SWNTs. Over the years, we have systematically studied the…
This article describes a method for generating Au-based nanocages with controlled wall thickness, porosity, and optical properties by dissolving Ag from Au-Ag alloy nanoboxes with H(2)O(2). It involves two steps: i) formation of Au-Ag alloy nanoboxes with some pure Ag left behind by titrating Ag nanocubes with aqueous…
The formation of nanoscale zinc oxide particles with an almost-monomodal size distribution synthesized by microwave heating of solutions of mononuclear zinc oximato or zinc acetylacetonato complexes in various alkoxyethanols is investigated. Transparent stable suspensions that contain these particles can be obtained f…
A newly designed photoactive nanohybrid structure based on the combination of near-infrared PbS quantum dots (QDs) as light harvester and one-dimensional TiO 2 nanobelts (NBs) to guide the flow of photogenerated charge carriers is reported. Efficient electron transfer from photoexcited PbS QDs to TiO 2 NBs has been de…
A combined theoretical and experimental approach is used to study the directed assembly of a lamellae-forming block copolymer on chemically patterned substrates. The period of the pattern is lower than that of the copolymer, whose characteristic morphology is then used to interpolate the features of the substrate. The…
Tailor-made ABA triblock copolymers (poly(furfuryl methacrylate)- b -poly(2-ethylhexyl acrylate)- b -poly(furfuryl methacrylate) (FEF)) bearing a reactive pendant furfuryl group were successfully synthesized by atom transfer radical polymerization. The chemical compositions were calculated by 1 H NMR, and molecular we…
Neural electrodes are essential tools for the study of the nervous system and related diseases. Low electrode impedance is a figure of merit for sensitive detection of neural electrical activity and numerous studies have aimed to reduce impedance. Unfortunately, most of these efforts have been tethered by a combinatio…
We have investigated coupling constants in elementary electron-phonon scattering processes on a graphite surface by the combined use of high-resolution electron-energy-loss spectroscopy (HREELS) and very low-energy electron diffraction (VLEED). HREELS is used to measure the modulations of electron transition probabili…