Volume 45 Number 1 (2014.3)
Special Feature
Applied Nanoscale Morphology: Form-originated Novel Properties
Part I. Special Feature
Overview
Research Reports
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2. Stacking Structure of Silicon Nanosheets and Their Electron Transport Properties
(2,307kB)pages 1-8
Hideyuki Nakano and Takashi Ikuno
The electron transport properties of functionalized silicon nanosheets (SiNSs) have been characterized using atomic force microscopy with a conductive cantilever under vacuum conditions at room temperature. Electrons are transported from the cantilever to the substrate through the SiNSs. The SiNSs exhibited nonresonant tunneling; the transport mechanisms are based on direct tunneling at low bias voltages and Fowler–Nordheim tunneling at high bias voltages.
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3. Optical Filters Using Metal-based Metamaterial
(3,159kB)pages 9-16
Daisuke Inoue, Atsushi Miura, Tsuyoshi Nomura, Hisayoshi Fujikawa,
Kazuo Sato, Naoki Ikeda, Daiju Tsuya, Yoshimasa Sugimoto and Yasuo Koide
Color filters comprising arrays of sub-wavelength holes or slits in an aluminum film were fabricated and their optical properties were evaluated. Their operation depends on surface plasmon effects and guided modes. A film with nanoholes was found to act as a polarization-independent RGB color filter. In contrast, a film with nanoslits acted as a polarization-dependent color filter.
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4. Fabrication of Polymer-immobilized Colloidal Crystal Films
(851kB)pages 17-22
Masahiko Ishii
Fabrication of polymer-immobilized colloidal crystal films by a conventional spray coating method has been demonstrated. Controlling both the viscosity of silica sphere-acrylic monomer dispersions as well as the wettability of substrates enabled the synthesis of colloidal crystal films with smooth surfaces and brilliant iridescent colors. The colors could be controlled by adjusting both the sphere concentration and diameter.
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pages 23-29
Toshikazu Satoh, Hisayoshi Fujikawa, Takanori Murasaki, Ichiro Yamamoto, Yoshifumi Kato and Yasunori Taga
A thin organic layer on indium tin oxide (ITO) was analyzed by X-ray photoelectron spectroscopy to examine the mechanism of the degradation of organic light emitting diodes (OLEDs). Oxidation of the organic layer by oxygen atoms and hydroxyl groups in ITO is presumed to accelerate the degradation of OLEDs.
Part II.
Special Review
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6. Nanostructured Materials in Biological and Artificial System
(1,327kB)pages 31-41
Yoshiaki Fukushima
Selected topics of research in the latest decade at the TOYOTA CRDL, INC. for nanostructured materials were reviewed under the comparisons introduced at the 11th Toyota Conference held in 1995. The results were discussed from the viewpoints of true nanostructured materials and the relationship between characteristics and properties.
Research Reports
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7. Controlled Synthesis and Characterization of Monodisperse CeO2 Nanostructures
(1,894kB)pages 43-50
Haruo Imagawa, Akihiko Suda, Kae Yamamura and Shouheng Sun
Controlled synthesis of monodisperse CeO2 nanostructures using thermal decomposition methods in organic solvents with surfactants was investigated. Monodisperse CeO2 nanoparticles (NPs) were synthesized; CeO2 NPs/Al2O3 samples show enhanced oxygen storage capacity. Monodisperse CeO2 nanoplates composed of assembled CeO2 NPs were synthesized using a bottom-up approach and they showed large band gap energy relative to bulk CeO2. -
pages 51-59
Masanori Ishigaki, Kenichi Ito, Shuji Tomura and Takaji Umeno
This paper proposes a new multi-port converter for future complex power systems such as electric vehicles or grid-connected industries. The proposed converter has the capability to connect four dc applications or sources in total, and so brings significant cost reduction and improves the total loss consumption of power systems. Such an approach could bring about variable application fields to dc electric power systems.
Brief Reports
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pages 61-63
Tadayoshi Matsumori, Tsuguo Kondoh, Atsushi Kawamoto and Tsuyoshi Nomura
This paper deals with density based topology optimization for fluid and fluid-thermal problems. For fluid problems, we discuss the proposed parameter settings for stabilizing the optimization processes based on the Brinkman penalization method, and objective functions for minimizing the drag force and maximizing the lift force. For fluid-thermal problems, we particularly focus on designing heat exchangers and present a design method for maximizing heat transfer of a heat exchanger under constant input power. -
pages 65-67
Koichiro Iwai and Machiko Azuma
We have developed a novel method, called the labeled compound addition method, for estimating the concentration of VOC in vehicle cabins. We have focused on the values measured using the bag method. The method proposed in this study is considered to be effective for predicting the amount of VOC emitted.