CFRP is a plastic-matrix composite material reinforced by carbon fibers. In our research, we aime... more CFRP is a plastic-matrix composite material reinforced by carbon fibers. In our research, we aimed to realize the best performance of CFRP for aircraft use by investigating the relationship between the structure and mechanical properties of CFRP. Firstly the high resolution characterization of CFRP was obtained by helium ion microscopy (HIM). Figure 1 shows the cross-section of CFRP. The structure of CFRP showed plastic matrix covering the carbon fibers. Typical diameter of carbon fibers was about 7 μm. Then 2D micro-mechanical characterization of CFRP with externally applied stress was performed by confocal Raman microscopy with insitu bending testing. The Raman spectrum of a carbon fiber is characterized by the presence of two peaks, corresponding to D-band induced by defects and G-band, respectively. Comparing the Raman spectra among them, there was no obvious peak shift after the fracture caused by the bending test. By comparing the peak intensity of Dband with that of G-band, t...
We systematically investigated the offset charges in the single electron tunneling spectra of Au-... more We systematically investigated the offset charges in the single electron tunneling spectra of Au-cluster-based double tunnel junction system using scanning tunneling microscope. Au-clusters / alkanedithiol / Au(111) substrates, where the size of clusters is tunable (1 - 3 nm in diameter) by the amount of Au deposition with small standard deviation (< 0.2 nm), were used. Statistical analysis shows that the offset charges distribute around 0 and the standard deviation of the distribution increases with increasing cluster size, which leads to the breakdown of the charge neutrality of the clusters.
CFRP is a plastic-matrix composite material reinforced by carbon fibers. In our research, we aime... more CFRP is a plastic-matrix composite material reinforced by carbon fibers. In our research, we aimed to realize the best performance of CFRP for aircraft use by investigating the relationship between the structure and mechanical properties of CFRP. Firstly the high resolution characterization of CFRP was obtained by helium ion microscopy (HIM). Figure 1 shows the cross-section of CFRP. The structure of CFRP showed plastic matrix covering the carbon fibers. Typical diameter of carbon fibers was about 7 μm. Then 2D micro-mechanical characterization of CFRP with externally applied stress was performed by confocal Raman microscopy with insitu bending testing. The Raman spectrum of a carbon fiber is characterized by the presence of two peaks, corresponding to D-band induced by defects and G-band, respectively. Comparing the Raman spectra among them, there was no obvious peak shift after the fracture caused by the bending test. By comparing the peak intensity of Dband with that of G-band, t...
We systematically investigated the offset charges in the single electron tunneling spectra of Au-... more We systematically investigated the offset charges in the single electron tunneling spectra of Au-cluster-based double tunnel junction system using scanning tunneling microscope. Au-clusters / alkanedithiol / Au(111) substrates, where the size of clusters is tunable (1 - 3 nm in diameter) by the amount of Au deposition with small standard deviation (< 0.2 nm), were used. Statistical analysis shows that the offset charges distribute around 0 and the standard deviation of the distribution increases with increasing cluster size, which leads to the breakdown of the charge neutrality of the clusters.
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