JP – Page 24 – TechConnect Briefs

Large Scale Nanocarbon Simulations

Tejima S., Iizuka M., Park N., Berber S., Nakamura H., Tomanek D., Research Organization for Information Science & Technology, JP

The mechanical response of carbon nanotubes to revere deformation has attracted much attention since their discovery in 1991. Carbon nanotubes have already demonstrated exceptional mechanical properties: their excellent flexibility during bending have been observed experimentally. [...]

Ca-Mg Phosphate Nano-Crystals for High Efficiency Gene Delivery and Expression in Mammalian Cells

Chowdhury E.H., Akaike T., Tokyo Institute of Technology, JP

Significant efforts are now being made for the development of non-viral gene-delivery techniques as alternatives to the viral vectors for basic research and clinical medicine. Despite existence of a wide variety of non-viral techniques particularly [...]

Colloidal ß-TCP Facilitates Synthesis of Collagen Nano-composite

Shibata Y., Yamamoto H., Miyazaki T., Showa University, JP

Recently, hydroxyapatite/collagen composites have received much attention in the field of tissue reconstruction, because human bone is mainly composed of hydroxyapatite and collagen fibers. However, these composites cannot be synthesized without secondary treatments, therefore the [...]

pH-Sensitive Nano-Crystals of Carbonate Apatite Regulate Delivery and Release Kinetics of DNA for Efficient Expression in Mammalian Cells

Chowdhury E.H., Akaike T., Tokyo Institute of Technology, JP

The completion of whole human genome sequencing encourages the development of a powerful gene delivery technology for elucidating structure, regulation and function of genes and proteins in addition to the emerging biomedical applications, such as [...]

Single-Dot Spectroscopy of Low Density GaAs Quantum Dots Grown by Modified Droplet Epitaxy

Yamagiwa M., Minami F., Koguchi N., Tokyo Institute of Technology, JP

Low density GaAs/AlGaAs quantum dots (QDs) have been fabricated using Modified Droplet Epitaxy (MDE) [1] for the spectroscopic study of single QDs using microphotoluminescence (µPL). In µPL measurements, the excitation/observation area is focused by a [...]

Nano-Structured C60-SAM Formed on Ultrathin Au Films/MgO Single Crystal

Yamamoto H., Iwata N., Shimizu Y., Nihon University, College of Science & Technology, JP

Exotic electric conducting properties have been expected in organic molecules/metals interfaces with lowdimensional nano-structures. A self-assembly monolayer of a C60 derivative, C60-O-C8SH, (C60-SAM) was synthesized on ultrathin Au films which were deposited on MgO (100) [...]

Synthesis of Spinel Ferrite Particle/Organic Hybrid from Metal-Organics

Yogo T., Nakamura S., Sakamoto W., Nagoya University, JP

Spinel particle/organic hybrids were succsessfully synthesized from metal-organics below 100oC. Chlated iron- (iron allylacetylacetonate) and nickel-organics were used as starting materials. Two nickel-metal organics (nickel acetylacetonate (NA) and nickel diammine propenylacetylacetonate (NPA)) were investigated. The [...]

Thermal and Morphological Study of a New Type of Nanocomposites: Functionalized PP / PA / Clay Nanocomposites

Oyama H.T., Oono Y., Nakayama K., National Institute of Advanced Industrial Science and Technology (AIST), JP

In the present work we explore a new type of nanocom- posite, in which clay is distributed in a multi-phase polymer system. Our nanocomposites consist of an immiscible polymer pair, polypropylene grafted with maleic anhydride [...]

Theoretical Studies on Relative Stabilities of C70 Fullerene Dimers

Zhao X., Slanina Z., Goto H., Toyohashi University of Technology, JP

Five stable C70 fullerene dimers with [2+2] bridges between hexagon-hexagon bonds, which are experimentally characterized very recently, have been investigated by several semi-empirical approaches and ab initio Hartree-Fock self-consistent field calculation and hybrid density functional [...]

Electrical Property of Fullerene Films Polymerized by Argon Plasma Treatment

Maruyama R., Sony Corporation, JP

Fullerene (C60) is a promising material for nano-carbon device research. Control of the electrical property of C60 is necessary for applications. C60 polymer has great promise because its unique structure allows its electrical and optical [...]