All issues
Volume 47, Issue 7
Displaying 1-15 of 15 articles from this issue
- |<
- <
- 1
- >
- >|
-
Chiaki HIROSE2004 Volume 47 Issue 7 Pages 499-502
Published: July 20, 2004
Released on J-STAGE: October 20, 2009
JOURNAL FREE ACCESSDownload PDF (581K) -
Akihiro MORITA2004 Volume 47 Issue 7 Pages 503-508
Published: July 20, 2004
Released on J-STAGE: October 20, 2009
JOURNAL FREE ACCESSDownload PDF (795K) -
Takayuki MIYAMAE, Hisakazu NOZOYE2004 Volume 47 Issue 7 Pages 509-515
Published: July 20, 2004
Released on J-STAGE: October 20, 2009
JOURNAL FREE ACCESSDownload PDF (897K) -
Toshifumi IIMORI, Yukio OUCHI, Kazuhiko SEKI2004 Volume 47 Issue 7 Pages 516-521
Published: July 20, 2004
Released on J-STAGE: January 30, 2010
JOURNAL FREE ACCESSDownload PDF (696K) -
Application to Polymer Surfaces for Liquid Crystal AlignmentMasahito OH-E2004 Volume 47 Issue 7 Pages 522-528
Published: July 20, 2004
Released on J-STAGE: October 20, 2009
JOURNAL FREE ACCESSDownload PDF (1002K) -
Kohei UOSAKI, Shen YE2004 Volume 47 Issue 7 Pages 529-534
Published: July 20, 2004
Released on J-STAGE: October 20, 2009
JOURNAL FREE ACCESSDownload PDF (720K) -
Chikaomi OHE, Koichi ITOH2004 Volume 47 Issue 7 Pages 535-543
Published: July 20, 2004
Released on J-STAGE: October 20, 2009
JOURNAL FREE ACCESSSum frequency generation (SFG) spectroscopic studies were performed on the structures of the Langmuir-Blodgett monolayers of palmitoyl-L and DL-ornithines (PO) and parmitoyl-L and DL-lysines (PL) on a quartz substrate and those of the monolayers of PO and PL at the air-water interface. The analyses of the SFG spectra based on spectral simulations indicated that (i) the NH groups in the monolayers of L-PO and L-PL on the quartz substrate are more or less parallel to the substrate taking two different orientations of±ca. 30° with respect to the drawing direction of the samples employed by preparation processes, (ii) on increasing the surface pressures of the L-PO and L-PL monolayers at the air-water interface the tilt angles of the CH3 group with respect to the surface normal decreases appreciably, and (iii) the tilt angle of the CH3group in the DL-PL monolayer is appreciably smaller than that of the L-PL monolayer, suggesting the existence of a specific interaction between the L- and D-enantiomers in the DL-PL monolayer at the air-water interface.View full abstractDownload PDF (1210K) -
Hirokazu UETA, Morihiko SAIDA, Chikara NAKAI, Yoichi YAMADA, Masahiro ...2004 Volume 47 Issue 7 Pages 544-549
Published: July 20, 2004
Released on J-STAGE: October 20, 2009
JOURNAL FREE ACCESSA combination of a CH4 supersonic molecular beam and a scanning tunneling microscope (STM) has been applied to analyze the formation processes of a monolayer graphite (MG) on a Pt (111) surface. It is found that a full mono-layer develops only when the surface normal component of the CH4 kinetic energy exceeds the threshold much greater than the activation barrier height for the CH4 dissociation on Pt (111). The major cause of the reaction termination below the threshold energy is the enhancement of the activation barrier height due to the reduction of the surface work function, which is resulted from the graphite formation.View full abstractDownload PDF (2110K) -
Toshihiko YOSHIMURA, Youji YAMASHITA, Kazunori INAMI, Takahiro TSUTSUM ...2004 Volume 47 Issue 7 Pages 550-554
Published: July 20, 2004
Released on J-STAGE: October 20, 2009
JOURNAL FREE ACCESSThe generation of a carbon nanotube was investigated in arc electric discharge in the mixed gas of helium and the atmosphere. A carbon stick and a carbon stick in which lithium is inserted were used for the negative electrode in the arc electric discharge. The carbon stick with litium tends to accelerate the generation of carbon nanotube. It is found that the generation of a carbon nanotube is restricted in the range of atmosphere partial pressure from 10 kPa to 20 kPa and the ideal spherical substance with the size from several hundred nanometers to several micrometers is generated. If the atmosphere partial pressure is lower than those range, the spherical material change into carbon nanotube or carbon fiber.View full abstractDownload PDF (1824K) -
A Study on the Ionization of CO2 and Discharge Conditions in a Magnetically Supported Glow-dischargeHiroaki ITO, Kiyotaka WASA2004 Volume 47 Issue 7 Pages 555-561
Published: July 20, 2004
Released on J-STAGE: October 20, 2009
JOURNAL FREE ACCESSWe have studied on a cold-CO2plasma in a Penning-type rf-glow discharge tube (13.56 MHz) for a gas pressure ranged from 2 to 133 Pa by using optical emission spectroscopy and quadrapole mass spectrometry. It was found that the discharge power to sustain a glow discharge varied with the gas pressure similar to the Paschen's law on a sparking voltage. The minimum rf-power was found at 10Pa. The optical emission spectroscopy and the quadrapole mass spectrometry showed ionization of CO2 was predominant at a low gas pressure region below the minimum discharge gas pressure of 10 Pa. While, the dissociation of CO2 was predominant at a high gas pressure region above the minimum gas pressure of 10 Pa. The addition of H2 into the CO2 plasma in the high gas pressure region produced CnHx such as CH3 and C2H3 at a room temperature. The glow discharge plasma has a potential for a fixing and/or control of CO2 greenhouse gas under a low power consumption.View full abstractDownload PDF (3866K) -
Motonobu YUKAWA, Shoji IIDA, Takashi EURA2004 Volume 47 Issue 7 Pages 562-567
Published: July 20, 2004
Released on J-STAGE: January 30, 2010
JOURNAL FREE ACCESSPolycrystalline La1-xCaxMnO3-δ thin film was formed on a Si substrate coated with SiO2 by rf-sputtering in a 100% oxygen atmosphere. A sintered target with almost the same composition as the objective film was used for sputtering. In this study, we analyzed the deposited film's composition, crystallization, specific resistance and temperature coefficient of resistance at room temperature. Results show that the film's composition could be controlled by the target component : when the substrate temperature was high, it was possible to obtain a film with superior crystallization and lower specific resistance. Results also indicate that the temperature coefficient of resistance was influenced little by the substrate temperature.View full abstractDownload PDF (876K) -
Toshiyuki ADACHI2004 Volume 47 Issue 7 Pages 568-573
Published: July 20, 2004
Released on J-STAGE: October 20, 2009
JOURNAL FREE ACCESSPhase formation and diffusion have been investigated in Cu-Si system. Field ion microscope (FIM) and atom-probe field ion microscope (AP-FIM) were used to determine the crystal structures and chemical compositions of the grown phases. From the results of depth profile by AP-FIM, it is proved that the silicide phase take the layer structure of Cu-Si mixture layer and pure Cu layer. The Cu silicide phase estimated was Cu3Si of orthorhombic structure. The orientation relationship of silicide and Si substrate was [111]Cu3Si || [111]Si. The measured value of the diffusion of Cu atoms in Si was four orders in magnitude smaller than the estimated value calculated by the equation of Hall and Racette. Field ion images of Cu atoms in the Cu silicides were dark compared with Si atoms, so that the crystal structures of the Cu silicides have not been determined by FIM.View full abstractDownload PDF (1446K) -
Yoshinori YAMADA, Satoru IWAMORI, Yasuyuki TAKAHASHI2004 Volume 47 Issue 7 Pages 574-580
Published: July 20, 2004
Released on J-STAGE: October 20, 2009
JOURNAL FREE ACCESSA frictional durability and mechanical properties of the polytetrafluoroethylene (PTFE) thin films prepared by RF sputtering were estimated by tensile test, and the chemical structures of these films were estimated by x-ray photoelectron spectroscopy (XPS) analysis. The values of the tensile modulus and the breaking strength of the PTFE thin film were 25150 MPa and 545 MPa, respectively. These values were much smaller than those of the bulk PTFE. The mechanical properties of the PTFE thin film were influenced by the heat treatment. Although the tensile modulus and the breaking strength increased with the temperature of the heat treatment, the breaking strain decreased. The breaking strength and the breaking strain decreased with the heat treatment more than 200°C. These results indicate that the excessive cross linking structure in the PTFE thin film due to the heat treatment caused brittleness of the film. Although the frictional durability of the PTFE thin film was increased by the heat treatment within 200°C, it was decreased by the heat treatment at 300°C.View full abstractDownload PDF (1319K) -
Satoru KANEKO, Kensuke AKIYAMA, Takeshi ITO, Hiroyasu YUASA, Shinji YA ...2004 Volume 47 Issue 7 Pages 581-584
Published: July 20, 2004
Released on J-STAGE: October 20, 2009
JOURNAL FREE ACCESSThe fourth harmonic of Q-switched YAG was used to deposit yttria-stabilized zirconia (YSZ) film on Si(100) substrate. A secondary function generator was employed to modulate Q-switch while the primary generator was synchronized with flash lamps to decrease repetition rate of laser beam. At rate of 2 Hz, beam energy increased50% per pulse. YSZ film was deposited on Si(100) using 3 mol% YSZ sintered pellet and 9 mol% single crystal YSZ as targets. In order to improve crystallinity of YSZ, two-step deposition was also carried out; deposition in oxygen insufficient atmosphere followed by oxygen sufficient atmosphere. The full width at half maxim (FWHM) of rocking curve showed 1.4° for the film produced by two-step deposition on Si substrate with thin SiO2 layer using single crystal YSZ as a target.View full abstractDownload PDF (655K) -
Results of the polytetrafluoroethylene tubeHiroyuki YOSHIKI, Hiroyuki SHOJI, Yasuhiro HORIIKE2004 Volume 47 Issue 7 Pages 585-589
Published: July 20, 2004
Released on J-STAGE: October 20, 2009
JOURNAL FREE ACCESSSmall size and low-power excited atmospheric-pressure plasma source was proposed and applied to the inner wall modification of a polytetrafluoroethylene (PTFE) tube of φ1 ×0.5 mm. The tube was set between the parallel-plate electrode (2 mm width ×20100 mm long). RF (13.56 MHz) power was supplied to one electrode via a matching network, the other electrode was grounded. The π-type matching network was miniaturized (150 × 100 × 40 mm3) and an inductance L was optimized to satisfy the resonance condition with excitation frequency. He gas was introduced into the tube and exhausted to the air and then the plasma was generated at 25 W and 0.10 l/min1.0 l/min and restricted inside the tube. By rolling up a tube, the successive plasma treatment can be attained. The inner wall of the plasma treated PTFE tube showed the increase of the wettability. The maximum wettability was obtained at a gas flow rate of 0.20 l/min and a plasma treatment time of 15 s. X-ray photoelectron spectroscopy (XPS) of the plasma treated PTFE inner wall revealed an O1s peak at 532 eV corresponding to the C = O group and a hydrocarbon (CH) peak at approximately 285 eV. Scanning electron microscope (SEM) surface pictures showed that the plasma treated PTFE inner wall is smoothed due to the etching effect. It is expected that this technique is easily applicable to enhance biocompatibility for a blood circulating tube.View full abstractDownload PDF (811K)
- |<
- <
- 1
- >
- >|