Papers – Page 13 – TechConnect Briefs

Massively Parallel Simulation on Large-Scale Carbon Nanotubes

Tejima S., Berber S., Minami K., Jimbo N., Namamura H., Kanada Y., Tomanek D., Research Organization for Information Science & Technology, JP

Carbon nanotubes and fullerene have a lot of applicability for industries as nanotechnology. In order to extend its applicability, the computational simulation would be powerful and effective tools for finding and creating new materials and [...]

Criterion for Electrostatic Detachment of an Adhering Microparticle

Saito S., Himeno H., Takahashi K., Onzawa T., Tokyo Institute of Technology, JP

During micromanipulation, the influence of gravitational force becomes extremely small. The adhesional force is more significant for smaller objects. An adhered object can be detached by electrostatic interaction. In our earlier study, the electrostatic force [...]

Gas-phase Production of Monodisperse Ferroelectric Nanoparticles

Seol K.S., Tomita S., Takeuchi K., Katagiri T., Miyagawa T., Ohki Y., RIKEN, JP

Laser ablative technology was used to prepare monodisperse nanoparticles (4-20 nm in diameter) of lead zirconate titanate (PZT). Laser ablation of a PZT ceramic target in oxygen ambience produced amorphous and irregularly-shaped PZT nanoparticles. A [...]

A Scheme for Electrical Detection of Single Electron Spin Resonance

Martin I., Mozyrsky D., Jiang H.W., Los Alamos National Laboratory, US

We study a scheme for electrical detection of the spin resonance (ESR) of a single electron trapped near a Field Effect Transistor (FET) conduction channel. In this scheme, the resonant Rabi oscillations of the trapped [...]

Transfer of Atoms Between Condensates by Raman Transitions

Paranjape V.V., Panat P.V., Lawande S.V., Lakehead University, CA

Law and Bigelow (Phys.Rev. A58,4791,1998) have proposed a scheme for amplifying an atomic beam as it interacts with a confined alkali-atom condensate. In this scheme the condensate acts as a source for increasing the intensity [...]

Characterization of Core/Shell Nanoparticles by X-Ray Absorption Spectroscopy

Calvin S., Carpenter E.E., Stroud R.M., Harris V.G., Naval Research Laboratory, US

X-ray absorption spectra of nanoparticles with iron cores and oxide shells, synthesized using the reverse micellar method, were collected at the National Synchrotron Light Source. Comparison of the x-ray absorption near edge structure (XANES) to [...]

Noise Spectroscopy of a Single Spin with Spin Polarized STM

Nussinov Z., Crommie M., Balatsky A.V., Los Alamos National Laboratory, US

We propose a mechanism for detection of a single spin center on a non-magnetic substrate. In the detection scheme, the STM tunnel current is correlated with the spin orientation. In the presence of magnetic field, [...]

Structural and Morphological Transformations in Self-Assembled Sn Quantum Dots in Si Matrix

Moeck P., Lei Y., Topuria T., Browning N.D., Ragan R., Min K.S., Atwater H.A., Portland State University, US

Transmission electron microcopy (TEM) in both the parallel illumination and scanning probe mode (i.e. STEM) has revealed morphological and structural transformations in self-assembled II-VI, III-V and group IV semiconductor quantum dots (QDs). These transformations result [...]

Fabrication of Self Organized Copper Nanostructures on Structureless Surfaces

Kunz R., Kipp L., Skibowski M., Adelung R., Christian-Albrechts-University, DE

An easy way to cover large areas with nano-or microstructures is self-organization. Against intuition, we claim that structureless crystals in terms of surface features are well suitable for self organized structuring on the nano-and micrometer [...]

Controlled Synthesis and Directed Assembly of Vertically Aligned Carbon Nanofibers for Functional Nanoscale Devices

Merkulov V.I., Melechko A.V, Guillorn M.A., McKnight T.E., Austin D.W., Hale M., Zhang L., Yang X., Hensley D.K., Subich T., Doktycz M.J., Lowndes D.H., Simpson M.L., Oak Ridge National Laboratory, US

The controlled synthesis and directed assembly of materials at the nanoscale remain two of the most difficult challenges for the realization of functional nanoscale devices. For example, while there has been a great deal of [...]