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Photoinduced Surface Deposition Phenomenon of Chalcogenide Amorphous Films Containing a large Amount of Silver (Studies of Nucleation and Growth Process)

含大量银的硫族化物非晶薄膜的光诱导表面沉积现象（成核和生长过程的研究）

基本信息

批准号：
11650012
负责人：
KAWAGUCHI Takeshi
金额：
$ 1.92万
依托单位：
Nagoya Institute of Technology
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1999
资助国家：
日本
起止时间：
1999 至 2001
项目状态：
已结题

项目摘要

The Basic data of the nucleation and growth process were obtained for 2 years from 1999 to 2000. The samples used in this experiment were the bulk glasses in the system of Ag_xAs_<15>S_<40-x> (35≦x≦45) and the films in the system of Ag_x(Ge_<0.3>S_<0.7>)_<100-x> (55≦x≦67). The bulk glass with low Ag concentration shows small amount of segregated Ag but high density Ag particles. In contrast, the bulk glass with high Ag concentration shows large amount of segregated Ag but small density Ag particles with large size. On the other hand, the film samples with low Ag concentration shows small amount of segregated Ag and the samples with large Ag concentration shows large amount of segregated Ag. The number of Ag particles does not depend significantly on the Ag concentration. The Ag concentration affects the size of Ag particles. In fact, the illuminated area is densely covered with Ag deposits for high Ag concentration (x=65〜67), as if a continuous Ag film.The addition of nucleus former wa … More s found to be effective to increase the number of Ag particles. The addition of a small amount of Au metal is highly effective for the Ag-As-S bulk glasses. The implantation of Au^+ ions was also effective for the Ag-As-S bulk glasses. The electron beam irradiation before optical illumination was found to create high density Ag nucleus. In 2001, we have researched difference of the crystal growth mechanism between the bulk glasses and film samples. The crystal growth depends strongly depends on the Ag concentration, irrespective of the bulk glass and film sample.In summary, the following model may be proposed for the nucleation and growth process of Ag particles in the Photoinduced surface deposition phenomenon. Some nucleation site on the sample surface may assist the Ag deposition. In the case of bulk glasses, the number of sits is large for low Ag concentration and decreases with increasing the Ag concentration. This seems to be due to the glass structure. For the film sample, the site may be concerned with both surface roughness and structure of the films, since many Ag particles appear for the film samples with high Ag concentration. Both surface roughness and structure for the films may be large than for the bulk glasses. The addition of Au metal may produce the Au clusters in the glass and film and the Au cluster may act as a nucleation center of the Ag deposition process. The effect of Au cluster is significant for the bulk glass than for the film sample, the number of original site of the bulk glass is much less than the film sample. Less

获得了1999年至2000年两年间成核和生长过程的基本数据。本实验所用样品为Ag_xAs_<15>S_<40-x>(35≤x≤45)体系中的块体玻璃和Ag_x(Ge_<0.3>S_<0.7>)_<100-x>(55≤x≤67)体系中的薄膜。低银浓度的块体玻璃显示出少量的偏析银，但银颗粒密度较高。相比之下，高Ag浓度的块体玻璃显示出大量的偏析Ag，但Ag颗粒密度小、尺寸大。另一方面，具有低Ag浓度的膜样品显示出少量的Ag偏析，而具有高Ag浓度的样品显示出大量的偏析Ag。 Ag 颗粒的数量并不显着依赖于 Ag 浓度。 Ag浓度影响Ag颗粒的大小。事实上，在高Ag浓度（x=65〜67）下，照射区域密集地覆盖着Ag沉积物，就像连续的Ag膜一样。添加成核剂被发现可以有效地增加Ag颗粒的数量。添加少量的 Au 金属对于 Ag-As-S 大块玻璃非常有效。 Au^+ 离子的注入对于 Ag-As-S 块体玻璃也有效。发现光学照射之前的电子束照射会产生高密度的银核。 2001年，我们研究了块状玻璃和薄膜样品之间晶体生长机制的差异。晶体生长强烈依赖于银浓度，与块状玻璃和薄膜样品无关。总之，可以为光诱导表面沉积现象中银颗粒的成核和生长过程提出以下模型。样品表面的一些成核位点可能有助于银沉积。在块状玻璃的情况下，Ag 浓度较低时，位点数量较大，并且随着 Ag 浓度的增加而减少。这似乎是由于玻璃结构造成的。对于薄膜样品，该位点可能与薄膜的表面粗糙度和结构有关，因为对于高Ag浓度的薄膜样品会出现许多Ag颗粒。薄膜的表面粗糙度和结构可能比块状玻璃大。 Au金属的添加可以在玻璃和膜中产生Au簇，并且Au簇可以充当Ag沉积过程的成核中心。 Au簇对大块玻璃的影响比对薄膜样品的影响显着，大块玻璃的原始位点数量远少于薄膜样品。较少的