Reference LCIB-ARTICLE-2007-010doi:10.1021/cr030726oView record in Web of Science Record created on 2007-02-14, modified on 2017-05-12

Inorganic and bioinorganic solvent exchange mechanisms.

Metal ions are essential to many chemical, biological, and environmental processes. In the past two decades, many DNA-based metal sensors have emerged. While the main biological role of DNA is to store genetic information, its chemical structure is ideal for metal binding via both the phosphate backbone and nucleobases. DNA is highly stable, cost-effective, easy to modify, and amenable to combinatorial selection. Two main classes of functional DNA were developed for metal sensing: aptamers and DNAzymes. While a few metal binding aptamers are known, it is generally quite difficult to isolate such aptamers. On the other hand, DNAzymes are powerful tools for metal sensing since they are selected based on catalytic activity, thus bypassing the need for metal immobilization. In the last five years, a new surge of development has been made on isolating new metal-sensing DNA sequences. To date, many important metals can be selectively detected by DNA often down to the low parts-per-billion level. Herein, each me...

Metal Sensing by DNA

We review photonic applications of dielectric whispering-gallery mode (WGM) resonators-tracing the growth of the technology from experiments with levitating droplets of aerosols to ultrahigh-Q solid state crystalline and integrated on-chip microresonators.

Optical resonators with whispering-gallery modes-part II: applications

Proposed fusion and advanced (Generation IV) fission energy systems require high-performance materials capable of satisfactory operation up to neutron damage levels approaching 200 atomic displacements per atom with large amounts of transmutant hydrogen and helium isotopes. After a brief overview of fusion reactor concepts and radiation effects phenomena in structural and functional (nonstructural) materials, three fundamental options for designing radiation resistance are outlined: Utilize matrix phases with inherent radiation tolerance, select materials in which vacancies are immobile at the design operating temperatures, or engineer materials with high sink densities for point defect recombination. Environmental and safety considerations impose several additional restrictions on potential materials systems, but reduced-activation ferritic/martensitic steels (including thermomechanically treated and oxide dispersion–strengthened options) and silicon carbide ceramic composites emerge as robust structural...

Designing Radiation Resistance in Materials for Fusion Energy

We review the combinations of optical micro-manipulation with other techniques and their classical and emerging applications to non-contact optical separation and sorting of micro- and nanoparticle suspensions, compositional and structural analysis of specimens, and quantification of force interactions at the microscopic scale. The review aims at inspiring researchers, especially those working outside the optical micro-manipulation field, to find new and interesting applications of these methods.

Light at work: The use of optical forces for particle manipulation, sorting, and analysis

A single-beam gradient-force optical trap for dielectric particles, which relies solely on the radiation pressure force of a TEM(00)-mode laser light, is demonstrated in air for what is believed to be the first time. It was observed that micrometer-sized glass spheres with a refractive index of n=1.45 remained trapped in the focus region for more than 30 min, and we could transfer them three dimensionally by moving the beam focus and the microscope stage. A laser power of ~40 mW was sufficient to trap a 5- microm -diameter glass sphere. The present method has several distinct advantages over the conventional optical levitation method.

Observation of a single-beam gradient-force optical trap for dielectric particles in air

Review of advances in development of vanadium alloys and MHD insulator coatings

Theoretical Gibbs free energy study on UO2(H2O)n2+ and its hydrolysis products

Hydration numbers of the pentavalent and hexavalent actinyls (U, Np, and Pu) have been studied using the ab initio Hartree‐ Fock method including the effective core potentials. The calculations were carried out inclusive of the primary and the secondary hydration spheres and the dissociation energy was used to discuss the most stable structure. The results suggest that the hydration number na 5 is the most stable for the actinyls we have studied. The result for neptunyl(V) was in conflict with the previous Hartree‐Fock calculation, which only included the primary hydration sphere. It was concluded that the secondary hydration sphere is quite important in studying the hydration numbers of the actinyls. The atomic bond lengths of hydrated uranyl(VI) and neptunyl(V) obtained by the MP2 level calculation gave good agreement with experimental results. q 2000 Elsevier Science B.V. All rights reserved.

Hydration numbers of pentavalent and hexavalent uranyl, neptunyl, and plutonyl

We report the combined quantum mechanical and molecular dynamical simulations on thorium(IV) hydrates in aqueous solution. Hydration of the Th4+ ion in aqueous system was first investigated using the B3LYP hybrid density functional theoretical calculations. The results show that the first shell hydration number of Th4+ ion in liquid phase is 9 at the bond distance of Th−OI 2.54(1) A and Th−HI 3.22(1) A. Second, the second shell hydration properties of the Th4+ ion in aqueous solution were studied by the molecular dynamical simulation using AMBER force field. The concept of the hydrated ion was used, [Th(H2O)9]4+ being the cationic entity interacting in solution. The [Th(H2O)9]4+−water interaction potential was developed by ab intio B3LYP calculations. The partial atomic charge of [Th(H2O)9]4+ is derived from the ESP method. The MD calculated results show a well-defined second coordination shell and an ill-defined third shell around the [Th(H2O)9]4+ ion. The strong hydrogen bonding due to the polarization ...

Atsuyuki Suzuki

Papers

Observation of a single-beam gradient-force optical trap for dielectric particles in air

Review of advances in development of vanadium alloys and MHD insulator coatings

Theoretical Gibbs free energy study on UO2(H2O)n2+ and its hydrolysis products

Hydration numbers of pentavalent and hexavalent uranyl, neptunyl, and plutonyl

Quantum Mechanical and Molecular Dynamical Simulations on Thorium(IV) Hydrates in Aqueous Solution