Materials Literature
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Tumor vessels possess unique physiological features that might be exploited for improving drug delivery. In the present study, we investigate the possibility of modifying polyethylene glycol-ylated liposome cationic charge of polyethylene glycol coated liposomes to optimize delivery to tumor vessels using biodistribut…
The Glass Transition: Relaxation Dynamics in Liquids and Disordered Materials , E. Donth Springer-Verlag, New York, 2001. $99.00 (418 pp.). ISBN 3-540-41801-6 Buy at Amazon
Mussels owe their sessile way of life in the turbulent intertidal zone to adaptive adjustments in the process and biochemistry of permanent attachment. These have understandably attracted scientific interest given that the attachment is rapid, versatile, tough and not subverted by the presence of water. The adhesive p…
Abstract SHELXE was designed to provide a simple, fast and robust route from substructure sites found by the program SHELXD to an initial electron density map, if possible with an indication as to which heavy-atom enantiomorph is correct. This should be understood as a small contribution to high-throughput structural…
This Account focuses on the most recent and systematic efforts in the area of functionalization chemistry of the single-wall carbon nanotubes (SWNTs) which utilizes direct fluorination for the preparation of "fluoronanonotubes" and their subsequent derivatization. The results obtained prove that the addition of fluori…
column 1, line 14: "fuels and materials" should read "organic fuels and materials."Page 529, Table 4, line 10: "smithiti" should read "smithii."Page 530, column 2, line 5 from bottom: reference 651 should be deleted.Page 531, Table 5, Binding affinity: for CenA BMCC, "41" and "1.89" should read "8.6" and "0.40," respe…
Abstract Carbon nanotubes are attractive new materials. It has been about a decade since carbon nanotubes were discovered. Carbon nanotubes have many outstanding properties and have many practical or potential applications. In this short review we introduce recent advances in carbon nanotubes as potential material for…
Recent demonstrations of negative refraction utilize three-dimensional collections of discrete periodic scatterers to synthesize artificial dielectrics with simultaneously negative permittivity and permeability. In this paper, we propose an alternate perspective on the design and function of such materials that exploi…
The title complex, (nBu4N)+[(HCPz3)Ce(NO3)4]− or (C16H36N)[Ce(NO3)4(C10H10N6)], which is the first lanthanide(III) complex of tris(pyrazolyl)methane (HCPz3), is 11-coordinate. The Ce—O and Ce—N bond lengths are in the ranges 2.514 (3)–2.685 (3) and 2.686 (4)–2.761 (4) Å, respectively.
Cu-substituted Z-type ferrite (Ba 3 Co 2- x Cu x Fe 24 O 41 , where X =0, 0.2, 0.4, 0.6 and 0.8) powders were synthesized using a citrate precursor method. Single Z-type phases were found by X-ray diffraction to form at a relatively low temperature of 1100–1150°C. With an appropriate sintering aid, highly dense Cu-sub…
In order to search for relaxor ferroelectrics or relaxor antiferroelectrics in Pb-excluded substances, ferroelectric and antiferroelectric mixed crystals Rb 1- x (NH 4 ) x H 2 PO 4 are investigated from the theoretical viewpoint of the precursor to glass state. Both boundary regions between ferroelectric (FE) and glas…
We have heteroepitaxially deposited pure and TiO 2 -doped Ba 0.6 Sr 0.4 TiO 3 (BST-0.4) films on (001)-oriented MgO substrates using pulsed-laser deposition. By optimizing microstructures, we have successfully increased the dielectric nonlinearity and decreased the dielectric loss of BST films. By inserting a very thi…
The synthesis of 6-(2,5-dimethoxy-4-(2-aminopropyl)phenyl)hexylthiol, an agonist with a very high affinity for the 5HT2A serotonin receptor subtype is reported. This agonist was designed to be attached to highly fluorescent cadmium selenide/zinc sulfide core/shells via a thiol at the end of a linker arm. This conjugat…
The electrooptical (EO) characteristics of polymer-stabilized ferroelectric liquid crystals (PSFLCs), which are fabricated by UV photocure of doped monoacrylates with mesogenic side chains at a temperature where the LC medium is in the SmC * phase under the simultaneous application of a bipolar square-pulsed AC electr…
2.0-µm-thick Pb(Zr x Ti 1- x )O 3 (PZT) films were grown with the deposition rate of 1.5 µm/h on (111)Pt/TiO 2 /SiO 2 /Si substrates at 600°C by metalorganic chemical vapor deposition (MOCVD). Moreover, their electrical properties were investigated as a function of the film thickness and the Zr/(Zr+Ti) ratio, x . The…
The dielectric properties of the c -oriented SrBi 2 Ta 2 O 9 (SBT) thin films are investigated with interdigital surface electrodes. The films are grown directly on MgO (100) substrates by pulsed laser deposition. The typical values of dielectric constant and dissipation factor at 100 kHz for 100-nm-thick SBT films ar…
Submicron particles of potassium niobate KNbO 3 were prepared by a colloid chemistry method. A rock-salt-type KF block in a layered perovskite, K 2 NbO 3 F, with a K 2 NiF 4 type structure was selectively dissolved in water to produce perovskite nanosheets at room temperature. The self-assembly between perovskite nano…
Ferroelectric Pb(Zr,Ti)O 3 (PZT) thin films with various Zr/Ti ratios were fabricated by ink-jet printing (IJP). Two kinds of precursor solutions for PbTiO 3 (PT) and PbZrO 3 (PZ) were prepared from Pb(OCOCH 3 ) 2 ·3H 2 O, Ti[OCH(CH 3 ) 2 ] 4 and Zr(OC 4 H 9 ) 4 . Seven 1 ×1 cm 2 square patterns with mixing ratios PT:…
We discuss electrode-dielectric interfaces in ferroelectric thin films and thin films that have high dielectric constants. We consider the charge on the electrodes in several cases, and focus on the effects that arise from this charge being distributed over a finite length (i.e. the Thomas-Fermi screening length). The…
Pristine, W and Mn 1% doped Ba 0.6 Sr 0.4 TiO 3 epitaxial thin films grown on the LaAlO 3 substrate were deposited by pulsed laser deposition (PLD). Dielectric and ferroelectric properties were determined by the capacitance measurements and X-ray diffraction was used to determine both residual elastic strains and defe…