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Volume 59 (1996)
- Issue 6 Pages 672-
- Issue 5 Pages 582-
- Issue 4 Pages 489-
- Issue 3 Pages 385-
- Issue 2 Pages 276-
- Issue 1 Pages 105-
Volume 59, Issue 2
Displaying 1-9 of 9 articles from this issue
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Shigeharu URABE1996 Volume 59 Issue 2 Pages 276-284
Published: April 25, 1996
Released on J-STAGE: August 11, 2011
JOURNAL FREE ACCESSRecent photographic silver halide emulsion grain and its preparation methods are described. Studies on the growth mechanism and the structure of silver bromide and silver iodo- bromide tabular grain are also reviewed.View full abstractDownload PDF (6501K) -
Studies with Analytical Color Fluorescence Electron Microscopy, High- resolution Scanning Electron Microscopy and Atomic Force MicroscopyHiroshi SAIJO, Makoto SHIOJIRI1996 Volume 59 Issue 2 Pages 285-303
Published: April 25, 1996
Released on J-STAGE: August 11, 2011
JOURNAL FREE ACCESSProgress on the surface study of silver bromide microcrystals grown in gelatin has been traced with cathodoluminescence electron microscopy, low voltage high- resolution scanning electron microscopy and atomic- force microscopy. Gelatin remained on the surfaces of AgBr after gelatin removing process with enzyme or with warm-water dilution. Residual gelatin found between particles was 20 nm in diameter. Cyanine dyes nucleated near silver halide surfaces and adsorb to grow with a supply of fresh dyes from the surrounding solution. The size of the aggregates were about (20- 30) ×(30- 50) nm and rectangular in shape. The thickness of the aggregate varied much depending upon the molecular structure of dye and their counter ion. The J- aggregates aligned linearly touching each other to form nulti-layered islands. The quantities of adsorbed dyes are not uniform between particles and/ or on the same particle.View full abstractDownload PDF (39630K) -
Mitsuo KAWASAKI, Hideki UCHIKI1996 Volume 59 Issue 2 Pages 304-312
Published: April 25, 1996
Released on J-STAGE: August 11, 2011
JOURNAL FREE ACCESSBy immersing an Ag (111) film covered with an ultrathin Au layer, a few nanometers thick, in a dilute alkali halide (KBr or KCl) solution, a silver halide monolayer forms on top of the Au layer. This unique interfacial reaction likely involves silver ion transfer from the underlying Ag (111) to the solid/ liquid interface across the Au layer. The STM images taken for the silver halide monolayer suggest thatsilver and halide ions in the monolayer structure are arranged with the same symmetry and with an approximately identical periodicity as those associated with the real AgX (111) plane. This compact monolayer structure seems to be responsible for the surprisingly high stability of the silver halide monolayer in the ambient air that remains intact for at least several weeks.View full abstractDownload PDF (6894K) -
Kenichi KUGE, Shinichi MORITA, Nobuo MII1996 Volume 59 Issue 2 Pages 313-320
Published: April 25, 1996
Released on J-STAGE: August 11, 2011
JOURNAL FREE ACCESSThe Belousov- Zhabotinsky reaction (BZ reaction) shows periodical generation of bromide ions. AgBr grains were prepared by adding drops of AgNO3 solutionto the solution of the BZ reaction synchronously to pBr (pAg) change. The synchronous pAg change was kept throughout the addition of AgNO3 solution. When they were added at every midpoint of increase of pAg, monodisperse cubic grains were mainly obtained. When they were added at every minimumof pAg, skeletal crystals and dendrite crystals growing at each corner of cube were obtained at certain addition amounts.View full abstractDownload PDF (4821K) -
Katsuhiko SUZUKI, Hisakazu NOZOYE1996 Volume 59 Issue 2 Pages 321-325
Published: April 25, 1996
Released on J-STAGE: August 11, 2011
JOURNAL FREE ACCESSMolecular images of an organic adsorbate on silver halide have been observed using AFM (atomic force microscopy). Sensitizing- dyes and restrainers adsorbed on single grain films of AgBr cubic crystals were examined. In the case of 1- ethyl- 2-[(1- ethyl- 2 (1H)- quinolinylidene) methyl] quinolinium bromide (2, 2'-cyanine), a molecular image was clearly observed. It was revealed that 2, 2'- cyanine had a two- dimensional arrangement of a= 0.8 (nm), b= 1.6 (nm), and β= 118-130 (deg), with approximately 10 degrees of slip angle from the AgBr ‹010 › direction.
Based on this arrangement, adsorption model was proposed and discussed.View full abstractDownload PDF (9050K) -
Akihiro HIRANO1996 Volume 59 Issue 2 Pages 326-333
Published: April 25, 1996
Released on J-STAGE: August 11, 2011
JOURNAL FREE ACCESSThe decay of photoconductivity in AgBr and AgBrI emulsion grains is investigated by means of 110MHz radiofrequency technique. The decay component with a decay time of 20μEsec in AgBr grains is ascribed to positive holes. The decay time was independent of grain size and excitation intensities. Hole traps determining the decay time of positive holes are concluded to be located within AgBr grains and indicated to be silver clusters. Hydrogen hypersensitization and reduction sensitization brought hole traps to the grains.View full abstractDownload PDF (910K) -
Kenichi KUGE, Masanobu SAITO, Nobuo MII1996 Volume 59 Issue 2 Pages 334-339
Published: April 25, 1996
Released on J-STAGE: August 11, 2011
JOURNAL FREE ACCESSDispersion of latent image specks formed by β- radiation was studied for sulfur- sensitized cubic grain emulsions by means of the arrested development technique, and compared with the one for the sulfur- sensitized octahedral grain emulsions reported previously. The number of latent image specks in one grain, n, was counted and the distribution of n was measured. The average number of β- particles striking one grain, w, was evaluated statistically. The average number of latent image specks in one grain, v, increased with w, and the relationship between w and v was linear at small w. The average number of latent image specks formed by one strike of a β- particle, z, was evaluated from this relationship, and it increased with the sensitization level. But this increase for the cubic grain emulsions was smaller than that for the octahedral ones. It was confirmed again that this value z is the useful and quantitative index for the dispersion of latent image specks.View full abstractDownload PDF (789K) -
Effect of Application of Bias Voltage on Film FormationKatsuyoshi HOSHINO, Akihiro KATO, Kazuhiro KURASAKO, Hiroshi KOKADO1996 Volume 59 Issue 2 Pages 340-345
Published: April 25, 1996
Released on J-STAGE: August 11, 2011
JOURNAL FREE ACCESSAn image formation based on the photocatalytic and electrochemical deposition of phthalocyanine films was investigated. The method utilizes an aqueous dispersion consisting of pigment (metal- free phthalocyanine), surfactant, photocatalyst (Ru (bpy) 3Cl2, bpy= bipyridine) and sacrificial agent ([Co (NH3) 5Cl] Cl2). Pigment films were deposited on the whole surface of the substrate when a bias voltage near 0.2 V was applied to the substrate in the dispersion. Photoirradiation to the dispersion through a photomask during the electrolysis resulted in retardation of film deposition on an exposed area and in accelaration of it on an unexposed area, leading to the formation of a negatively- patterned film with a good contrast. This novel method is preferable to our previously- reported method based only on the photocatalytic reactions in that the former raised the limitation to an aspect ratio of exposed and unexposed areas in photocatalytic patterning of pigment films.View full abstractDownload PDF (2501K) -
Hirobumi ENOMOTO1996 Volume 59 Issue 2 Pages 346-353
Published: April 25, 1996
Released on J-STAGE: August 11, 2011
JOURNAL FREE ACCESSWe have measured spectral characteristics (spectral density, spectral sensitivity) of currentcolor photographic materials, and have tested adaptability of spectral products of status A, M density using computer simulation. With the results obtained, we confirm that, most of photographic materials have the same characteristics, and red spectral products of status A, M density for cyan dye are not suitable from viewpoint of stable measurement.View full abstractDownload PDF (875K)
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