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Process for preparing nano metal physically developing nucleus

A nano-metal and physical technology, which is applied in the field of preparation of physical development nuclei, can solve problems such as cumbersome operation, poor nuclear stability, and loss of catalytic activity of the nuclei, and achieve the effect of protecting stability

Inactive Publication Date: 2004-12-15
ZHONGKEYIN IND SHANTOU CITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation method of this core has cumbersome operations, and the stability of the core is poor, and it is easy to cause flocculation or sedimentation, which makes the core lose its catalytic activity.

Method used

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  • Process for preparing nano metal physically developing nucleus
  • Process for preparing nano metal physically developing nucleus
  • Process for preparing nano metal physically developing nucleus

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 3

[0038] Set the concentration to 5.8 x 10 -2 mol / L AgNO 3 Solution 40ml joins in the propionitrile resin and silica sol solution 400ml that weight volume percent concentration is 0.5%, wherein, propionitrile resin concentration is 35%, 60ml, silica sol concentration is 30%, 100ml, add water to 400ml; Stir evenly at 30°C with a stirring speed of 200 rpm; then quickly add a concentration of 4.4×10 -2 mol / L of KBH 4 solution, the amount of which is AgNO 3 2 times the molar weight, continue to stir for 15 minutes, the pH of the solution is controlled at 3.5, and nucleation occurs in the protective medium, and the diameter of the colloidal silver core observed under the electron microscope is 30-50nm, as attached figure 1 shown. Table 1 shows the results obtained after the positive film, negative film and processing agent were transferred.

Embodiment 4

[0040] The preparation condition of metal platinum nucleus is identical with embodiment 3, and the preparation concentration of chloroplatinic acid is 1.8 * 10 here -2 mol / L, 40ml, KBH 4 The prepared concentration is 3.6×10 -2 mol / L, 40ml. The diameter of the prepared platinum nucleus is 35-70nm observed under an electron microscope. See Table 1 for the prepared positive and negative films and the results after transfer of processing agents.

[0041] physical development kernel

[0042] From the data in the table, it can be clearly seen that whether it is a silver core or a platinum core, the particle diameter is less than 10nm, and the resulting image density is low, and the color tone is brownish yellow or yellowish red; only the particle diameter is greater than 10nm to obtain black tone. In addition, the protective medium also has an important influence on the size of the nuclear preparation.

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Abstract

A process for preparing the nano-class physical developing metal kernels includes proportionally adding the solution of metal salt containing Ag or Pt kernel to the solution of protecting medium, reaction at 20-50 deg.C while stirring, adding reducing agent and dregulating pH value to 1.5-4.0 to obtain 10-80 nm product. Its advantages are high stability in colloidal solution and high stack density.

Description

technical field [0001] The invention belongs to a preparation method of a physical development nucleus in a silver salt diffusion transfer system, in particular to a preparation method of a nanometer metal physical development nucleus. Background technique [0002] Silver salt diffusion transfer reversal principle (abbreviated as DTR principle) in "Photographic Silver Halide Diffusion Processes" written by A. Rott and E. Weyde, by Andr. Rott and Edith Weyde, The Focal Press , London and New York, 1972) have been described in a book. When the silver halide photosensitive layer is exposed, a latent image is formed, which is chemically developed by the developer, and reduced to silver to form a negative image; at the same time, the unexposed silver halide is rapidly dissolved by the silver complexing agent in the developer to form a silver complex The ions are diffused and transferred to the image receiving layer, and under the catalysis of the physical development nucleus of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03C8/06G03C8/28
Inventor 陈萍盛丽琴于淑芳郑德水
Owner ZHONGKEYIN IND SHANTOU CITY
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