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Volume 63 (2000)
- Issue 6 Pages 277-
- Issue 5 Pages 239-
- Issue 4 Pages 190-
- Issue 3 Pages 117-
- Issue 2 Pages 63-
- Issue 1 Pages 1-
Volume 63, Issue 2
Displaying 1-6 of 6 articles from this issue
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Kenichi KUGE, Kunitoshi YABE, Naokazu AOKI, Akira HASEGAWA, Nobuo MII, ...2000 Volume 63 Issue 2 Pages 63-67
Published: April 25, 2000
Released on J-STAGE: August 11, 2011
JOURNAL FREE ACCESSAddition of the tetrazolium compound (Tz) to the photographic emulsion affected largely the delayed formation of latent image specks in a vacuum. The sensitivity decreased strongly by the Tz addition. The increase of sensitivity through the delayed formation at the Tz added emulsion was very large and the sensitivity after the delayed formation reached the level equivalent to the control. As Tz acted as the formation site for photolitic silver atoms and enhanced the dispersion of latent image specks, not developable specks but undevelopable sub-specks and silver atom species are formed in almost all grains. The dispersed specks and species would be coagulated to form the developable specks by the delayed formation in a vacuum.View full abstractDownload PDF (762K) -
Masahiro FUNAHASHI, Junichi HANNA2000 Volume 63 Issue 2 Pages 69-77
Published: April 25, 2000
Released on J-STAGE: August 11, 2011
JOURNAL FREE ACCESSOrganic amorphous semiconductor films are widely applied to xerographic applications and electroluminescence devices due to feasibility of preparing large-area and uniform thin films in low cost. Their electrical properties, in particular, the carrier transport properties, however, are far from ideal properties in their molecular crystals and limit their device applications as they are. Recently we have developed a new type of organic semiconductors with liquid crystallinity in which we expected fast carrier transport due to the self-organizing molecular alignment. In fact, 2-phenylnaphthalene derivatives, which are a representative material of this type, exhibit the superior carrier transport properties characterized by a fast ambipolar carrier mobility of 10-4-10-2 cm2/Vs independent of temperature and electric field. In this paper, we survey its carrier transport properties on the basis of our experimental results and discuss them in comparison with those in the amorphous semiconductors to demonstrate its high potential as a new type of opto-electronic imaging materials in the future. In addition, new properties originated from anisotropic molecular alignment and their application to polarized light emitting diodes are also demonstrated.View full abstractDownload PDF (3221K) -
Kunihiro ICHIMURA2000 Volume 63 Issue 2 Pages 78-84
Published: April 25, 2000
Released on J-STAGE: August 11, 2011
JOURNAL FREE ACCESSMolecular orientations triggered by photochemical events and autocatalytic formation of acidic and basic species catalyzed photogenerated acids and bases, respectively, are discussed from viewpoints of photofunctional chemistry. Light absorption is based on the matching of electric transition dipole moment of molecules with the electric vector of light so that optical anisotropy is generated as a consequence of photochemical transformations. The photoinduced optical anisotropy can be markedly amplified by the combination of suitable liquid crystal systems. Another system exhibiting molecular amplification consists of the autocatalytic decomposition of acid amplifiers, which is triggered by photogenerated acidic species, leading to the enhancement of photosensitivity of chemically amplified photoresists. Base amplifiers liberating aliphatic amines in a non-linear manner are also mentioned.View full abstractDownload PDF (889K) -
Yoshihisa NAIJO, Hideyoshi TAKAGI, Toyohide TANAKA, Norihisa KOBAYASHI2000 Volume 63 Issue 2 Pages 85-91
Published: April 25, 2000
Released on J-STAGE: August 11, 2011
JOURNAL FREE ACCESSPolypeptide having carbazolyl groups (poly {γ-[β-(N-carbazolyl)-ethyl] L-glutamate}(PCLG)) was prepared in order to obtain high photoelectric properties. Polypeptides can align their main chain axes towards the electric field by suitable DC poling due to large dipole moment along the α-helical main chain. The molecular alignment of PCLG in the poled film by applying DC bias vertically to the plane of the film was evaluated with f20 estimated by the dielectric constant, and its effect on photoelectric properties was discussed. PCLG with lower molar mass gave highly oriented film, and the photocurrent was increased with the orientation. These indicate that molecular alignment is effective to increase photoelectric properties. PCLG poled film after annealing to 100°C for 2 hr showed the similar electric properties to that before annealing. Due to the rigid main chain with high molar mass of PCLG, oriented main chain direction is thought to be hardly relaxed by heat treatment. PCLG poled film was revealed to show high photoelectrical and thermal properties.View full abstractDownload PDF (6661K) -
Tsuyoshi KAWAI, Masahiro IRIE2000 Volume 63 Issue 2 Pages 92-95
Published: April 25, 2000
Released on J-STAGE: August 11, 2011
JOURNAL FREE ACCESSPhotochromic diarylethene shows reversible change of refractive index upon photoisomerization. Newly synthesized diarylethene having t-butyl groups showed stable amorphous phase and photochromism in the salid state. Refractive index change as large as 0.038 was observed in the glass state.View full abstractDownload PDF (556K) -
Tetsuya MATSUYAMA2000 Volume 63 Issue 2 Pages 96-100
Published: April 25, 2000
Released on J-STAGE: August 11, 2011
JOURNAL FREE ACCESSIn 1998, We put the world's first mass-produced, full-color, photopolymer hologram. This hologram is starting to use at state-of-the-art holographic products and manufacturing services worldwide for a variety of applications including: product enhancement; packaging; promotional displays; book decoration; and premiums.
This report include the mass-production methods, repeatability, and evaluation these of full-color Lippmann hologram.View full abstractDownload PDF (631K)
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