Formation of silver sulfide binary cluster ions,as well as the effects of silver and sulfur content proportion,the cluster size range,the influence of laser fluence,the UV laser photolysis,etc.,was studied with the la...Formation of silver sulfide binary cluster ions,as well as the effects of silver and sulfur content proportion,the cluster size range,the influence of laser fluence,the UV laser photolysis,etc.,was studied with the laser ablation method and a tandem time-of-flight mass spectrometer.The results show that there exist two different forms of positively charge-bearing cluster ions;[(Ag2S)n Ag] + and [ (Ag2S)n-1 Ag3]+.The most possible forms of the sulfur sensitization centers acting as traps of photoelectrons are [Ag2S] +,[ Ag2S Ag] +,[ Ag2S Ag3]+ and the analogs.展开更多
IN the 1950s, when Chinese people of my age were inprimary school, songs praising the beauty of the Sun andMoon Pool and Ali Mountain were very popular. Then, bythe end of the 1970s, our friends enlarged to include Ta...IN the 1950s, when Chinese people of my age were inprimary school, songs praising the beauty of the Sun andMoon Pool and Ali Mountain were very popular. Then, bythe end of the 1970s, our friends enlarged to include Taiwancompatriots from whom we began to learn the various storiesabout these two places and their beautiful scenery. The Sun展开更多
WHEN we came to Lukang,Changhua County in westernTaiwan after leaving Chilung City in the north of Taiwan,we felt a totally different atmosphere. At Chilung,in the heavy rain of an early morning,mycompanions and I hur...WHEN we came to Lukang,Changhua County in westernTaiwan after leaving Chilung City in the north of Taiwan,we felt a totally different atmosphere. At Chilung,in the heavy rain of an early morning,mycompanions and I hurried to take pictures of a fish market bustlingwith 100 years of history.It was still in that darkness before dawn,wind mixed with rain,but the market was brightly lit and crowdedwith People.Among a confusion of voices were the loud calls展开更多
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 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.展开更多
文摘Formation of silver sulfide binary cluster ions,as well as the effects of silver and sulfur content proportion,the cluster size range,the influence of laser fluence,the UV laser photolysis,etc.,was studied with the laser ablation method and a tandem time-of-flight mass spectrometer.The results show that there exist two different forms of positively charge-bearing cluster ions;[(Ag2S)n Ag] + and [ (Ag2S)n-1 Ag3]+.The most possible forms of the sulfur sensitization centers acting as traps of photoelectrons are [Ag2S] +,[ Ag2S Ag] +,[ Ag2S Ag3]+ and the analogs.
文摘IN the 1950s, when Chinese people of my age were inprimary school, songs praising the beauty of the Sun andMoon Pool and Ali Mountain were very popular. Then, bythe end of the 1970s, our friends enlarged to include Taiwancompatriots from whom we began to learn the various storiesabout these two places and their beautiful scenery. The Sun
文摘WHEN we came to Lukang,Changhua County in westernTaiwan after leaving Chilung City in the north of Taiwan,we felt a totally different atmosphere. At Chilung,in the heavy rain of an early morning,mycompanions and I hurried to take pictures of a fish market bustlingwith 100 years of history.It was still in that darkness before dawn,wind mixed with rain,but the market was brightly lit and crowdedwith People.Among a confusion of voices were the loud calls
文摘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.
