Strain-Induced Confinement of Excitons in Quasi-free AgI Nanoparticles
Strain-Induced Confinement of Excitons in Quasi-free AgI Nanoparticles
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DOI：
10.1021/nl025511t
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发表时间：
2002-02
期刊：
影响因子：
10.8
通讯作者：
P. S. K. and;C. Sunandana
中科院分区：
文献类型：
--
作者：
P. S. K. and;C. Sunandana
测量了在环境条件下逐步碘化的亚稳Ag-Cu薄膜的光谱。空间受限的γ-AgI纳米颗粒在420 nm处激子吸收的延迟演化和不均匀加宽通过Z1，2激子峰-碘化的发展被猝灭的Ag-Cu簇控制而清楚地看到。Cu的加入不仅限制了颗粒的尺寸，而且有利于岛状生长模式。
The optical spectra of vapor quenched metastable Ag−Cu thin films progressively iodized under ambient conditions have been measured. Delayed evolution and inhomogeneous broadening of the exciton absorption at 420 nm of the spatially confined γ-AgI nanoparticles were clearly seen by the development of Z1,2 exciton peak − iodization being controlled by the as-quenched Ag−Cu clusters. Cu addition not only restricts the particle size, but also favors the island type growth mode.