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Assembly of Nanometer-sized Organic Molecules |
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Hiroyuki Isobe
(Associate Professor, The University of Tokyo) |
| An amphiphilic molecule that has hydrophobic and hydrophilic characters aggregates in solution to form molecular assemblies. We conjecture that cohesive and rigid structure of fullerene will serve as a unique hydrophobic basis of amphiphilic molecules. This project aims at the design and synthesis of amphiphilic fullerenes that lead to the development of functional molecular assembly such as gene delivery reagents. |
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Development of high performance quantum cascade lasers operating at undeveloped spectral region from mid-infrared to terahertz |
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Keita Ootani
(Research Associate, Tohoku University) |
| Undeveloped spectral region from the mid-infrared to terahertz has attracted significant interests because of a number of potential applications such as environment monitoring, medical diagnostics, and future high-speed communications. Quantum cascade lasers utilizing the semiconductor band structure engineering and the carrier recycling are expected to be promising candidates for the light source in this spectral region because of the compactness
and the high power capability. In this research, I am developing the low threshold, large tunability, and high power quantum cascade laser based on narrow gap semiconductors by investigating fundamental physics, which influences the device performance. |
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Exploration of oxide semiconductor quantum well structures towards light emitting and non-linear optical devices |
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Akira Ootomo
（Research Associate, Tohoku University） |
| In past decades, semiconductor
lasers and high-speed optical modulators have been
developed by virtue of semiconductor quantum well
structures. In comparison with conventional semiconductors,
oxide semiconductors have wide range of intriguing
physical properties, - transition to superconductor,
room temperature ferromagnetism, and ferroelectricity,
involving varieties of dielectric constant and its
temperature dependence.Considering dielectric confinement
effect, which has been theoretically predicted in
a quantum well sandwiched by barriers with a smaller
dielectric constant and a larger band-gap, large
enhancement of exciton effect is expected in perovskite
oxide quantum well structures. This results in the
increases of exciton binding energy and non- linear
optical susceptibility. In this context, I aim at
realizing efficient light emitting and non-linear
optical devices based on oxide semiconductor quantum
well structures. |
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Novel quantum effect devices using heterojunctions of peapod carbon nanotubes |
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Yutaka Oono
（Assistant Professor, Nagoya University） |
| The bandgap of peapods, single-walled carbon nanotubes encapsulating fullerenes, varies depending on kinds of encapsulated fullerene. The aim of this project is to exploit band engineering technique for the realization of carbon nanotube quantum wells by using this unique property of peapods. Namely, heterojunctions and quantum structures will be developed by modulating kinds of 'peas' in a peapod. Functional single molecular devices such as resonant
tunneling devices and single electron devices will also be fabricated by utilizing these peapod heterostructure. |
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Development of Microfluidic Chips for the Study of Bio/Nano-Solution Device |
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Yuzuru Takamura
(Associate Professor, Japan Advanced Institute of Science and Technology(JAIST)) |
| Recent developments in molecular biology promote the understanding of life process as assembled nanomachines, and strongly inspire their industrial applications. In order to analyze a cell at the molecular level, we need tools for precise handling of microfluid and for extraction of single bio-molecule such as DNA/RNA. In this research, microfluidic devices will be studied to manipulate such molecule or microfluid by microfabricated channel or structure,
to provide a new approach for the study of bio/nanodevice in solution. |
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Transport property and its control in nanometerscale molecular devices |
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Kazuhito Tsukagoshi
(Senior Research Scientist, RIKEN) |
| We propose to investigate transport properties in molecular systems directly connected by nanometerscale electrodes. In the nanometerscale molecular system, we expect that the transport would be based on a few of the quantum state of electron/spin. A target of this project is to extract the intrinsic property of the individual molecule by means of transport measurement. The understanding of the transport property of molecules will lead to invention
of novel integrated molecular devices in biotechnology area. |
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"Development of novel dielectrics using 2-dimentional layer stack structure" -Preparation of high dielectric constant capacitor having size-effect-free characteristics- |
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Hiroshi Funakubo
(Associate Professor, Tokyo Institute of Technology) |
| Dielectric constant of materials having perovskite structure decreases with decreasing film thickness. This effect is called "size-effect" and is a big problem for realizing high-density capacitor. I found "size-effect-free" characteristics in bismuth oxide layer, which has a natural superlattice consisting of bismuth oxide layer and the perovskite layer. In this study, I investigate the origin of the "size-effect free" characteristics. Moreover,
I try to establish a new type of materials having "size-effect free" characteristics by using the stack structure of nano-size 2-dimentional layer. |
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