Osaka University – TechConnect Briefs

Controlling Oxidation Reaction on Platinum by Spin Manipulation

Sison Escaño M.C., Nguyen T.Q., Nakanishi H., Kasai H., Osaka University, JP

Oxidation of metal surface is of outstanding practical importance in microelectronics, energy conversion systems and environmental devices. As an oxidation catalyst, platinum (Pt) is widely used in chemical and automotive industries. Thus far, the dissociative [...]

Novel Catalysis of Dendrimer: Efficient Nanocavity of Polyamine Dendrimer for Intramolecular Michael Reaction

Maeno Z., Mitsudome T., Mizugaki T., Jitsukawa K., Kaneda K., Osaka University, JP

The intramolecular Michael reaction of (E)-9-nitro-3-nonen-2-one was investigated using poly(propylene imine) dendrimers with alkyl chain on the periphery (Gx-C16, x = 3-5, x denotes the number of the generation). Gx-C16 showed higher catalytic activity than [...]

Controlled Synthesis of Subnano Pd Cluster Catalysts by Fine Tuning of Dendrimers

Mizugaki T., Kibata T., Maeno Z., Mitsudome T., Jitsukawa K., Kaneda K., Osaka University, JP

We recently succeeded in the fine control of the Pd cluster sizes in wide range using the fifth generation poly(propylene imine) (PPI) dendrimers. Preorganization of Pd ions within the PPI dendrimer with butanediamine core(G5-C4) and [...]

Effects of Ag and Pd Addition on Mechanical Property and Ion-migration Tolerance in Low Temperature Sintering Bonding Using Ag2O Paste

Hirose A., Itou T., Ogura T., Osaka University, JP

We have proposed a new bonding process using Ag2O paste composed of Ag2O particles mixed with reduction agent of triethylene glycol (TEG). Ag nanoparticles formed at around 130℃ to 160℃ through the reduction process. Such [...]

Fabrication of Micro Photonic Crystals for Handling of Terahertz Electromagnetic Waves

Kirihara S., Sano D., Niki T., Ohta N., Takinami Y., Osaka University, JP

Electromagnetic waves in terahertz ranges are possible to harmonize with molecule vibrations of various saccharides or proteins, and expected to control the biological material syntheses through the frequency excitements. In this investigation, metals and ceramics [...]

Enhancement of Defect Tolerance in the QCA-based Programmable Logic Array (PLA)

Notsu T., Miura K., Nakamae K., Osaka University, JP

In this study we analyze the precedent AND/OR plane cell of a programmable logic array (PLA) based on the quantum-dot cellular automata (QCA), then propose a modified layout that has better defect tolerance. We analyzed [...]

High-sensitive Label-free Biosensors Based on Carbon Nanotube Field-effect Transistors Modified with Aptamers

Maehashi K., Katsura T., Matsumoto K., Kerman K., Takamura Y., Tamiya E., Osaka University, JP

We have fabricated label-free protein biosensors based on aptamer-modified carbon nanotube field-effect transistors (CNTFET) for detection of immunoglobulin E (IgE). Since aptamers are artificial oligonucleotides, the aptamers are smaller in size than the Debye length. [...]

Coulomb Oscillations at Room-Temperature of Single-Walled Carbon Nanotube Field-Effect Transistors

Ohno Y., Asai Y., Maehashi K., Inoue K., Matsumoto K., Osaka University, JP

Single-walled carbon nanotube field-effect transistors with thin tunnel barriers were investigated, and room-temperature single-electron transistor (SET) operation was realized. Single-walled carbon nanotubes were grown by thermal chemical vapor deposition at 820 degrees Celsius for 10 [...]

Nanoscale Reaction Analysis of Resist Materials for Nanolithography

Kozawa T., Saeki A., Okamoto K., Tagawa S., Osaka University, JP

Recently, in semiconductor industry, elaborate extension of photolithography is getting closer to its capacity limit and post-optical lithographies have attracted much attention ever. Because they are capable of fabricating features below 32 nm, they are [...]

Two-Dimensional Simulation of Tunneling Using Quantum Lattice-Gas Automata

Sakai A., Kamakura Y., Taniguchi K., Osaka University, JP

We present the two-dimensional simulation of quantum tunneling considering the rough surface. It is demonstrated that the electron transmission through the potential barrier is significantly affected by the surface roughness pattern even if the same [...]