| Gas-phase cluster cations generated by direct laser ablation on AgBr/S mixture |
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| 作者姓名： | 崔卫东 彭必先 刘鹏 高振 朱起鹤 孔繁敖 |
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| 作者单位： | CUI Weidong，PENG Bixian (Institute of Photographic Chemistry，Chinese Academy of Sciences，Beijing 100101，China |
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| 摘 要： | Ｔｈｅｓｅｎｓｉｔｉｖｉｔｙｏｆｓｉｌｖｅｒｈａｌｉｄｅｅｍｕｌｓｉｏｎｓｃｏｕｌｄｂｅｉｍｐｒｏｖｅｄｇｒｅａｔｌｙａｆｔｅｒｂｅｉｎｇｃｈｅｍｉｃａｌｌｙｓｅｎｓｉｔｉｚｅｄ.Ｔｈｅｍａｔｔｅｒｗｈｉｃｈｐｌａｙｓａｎｉｍｐｏｒｔａｎｔｒｏｌｅｉｓｔｈｅｓｏｃａｌｌｅｄｓｅｎｓｉｔｉｚａｔｉｏｎｃｅｎｔｅｒｓｆｏｒｍｅｄｄｕｒｉｎｇｔｈｅｃｈｅｍｉｃａｌｓｅｎｓｉｔｉｚａｔｉｏｎｐｒｏｃｅｓｓ.Ｔｈｅｓｔｕｄｙｏｎｔｈｅｆｏｒｍａｔｉｎ,ｎａｔｕｒｅａｎｄｆｕｎｃｔｉｏｎｏｆｔｈｅｓｅｃｅｎｔ…
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| 收稿时间： | 4 September 1997 |
Gas-phase cluster cations generated by direct laser ablation on AgBr/S mixture |
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| Weidong Cui,Bixian Peng,Peng Liu,Zhen Gao,Qihe Zhu,Fan’ao Kong.Gas-phase cluster cations generated by direct laser ablation on AgBr/S mixture[J].Science in China(Chemistry),1998,41(2):182-186. |
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| Authors: | Weidong Cui Bixian Peng Peng Liu Zhen Gao Qihe Zhu Fan’ao Kong |
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| Institution: | (1) Institute of Photographic Chemistry, Chinese Academy of Sciences, 100101 Beijing, China;(2) State Key Laboratory of Molecular Reaction Dynamics, Institute of Chemistry, Chinese Academy of Sciences, 100080 Beijing, China |
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| Abstract: | The clusters produced by direct laser ablation on the sample made of mixtures of silver bromide and sulfur powder in different
molar ratios have been studied with a home-built tandem time-of-flight mass spectrometer. The results showed that Ag3S+ was still formed even if the content of AgBr was very high in the samples (AgBr:S= 100:5). Additionally, the clusters, the
general formula of which is Ag
m
S
p
+
(m = 1–3,p = 1–5), were formed, predominantly AgS
p
+
. The above binary clusters could combine AgBr units to produce ternary clusters. This work provided a further experimental
proof for the argument proposed by the present authors that Ag3S+ and the analogs are deep photoelectron traps of photosensitive silver halide emulsion during the exposure process. |
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| Keywords: | Ag/S clusters Ag/Br/S clusters photographic process photoelectron trap |
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