With the discovery of quantum well intermixing (QWI), it has made tremendous progress over the past few years. Among all the approaches of QWI, meticulous researches and wide range of applications are acquired in impurity free vacancy disordering (IFVD) owing to its unique merits. Present status of IFVD research and application is comprehensively analyzed from the aspect of theory, dielectric films, materials, quantum dots and applications.

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Stock enhancement is a fisheries management approach involving the release of hatchery organisms to increase abundance and commercial landing of natural fish or invertebrate population. Kuruma prawn Penaeus japonicus is one of the most important fishing and cultured crustaceans in China coast, and thus is listed as one of the important target species for stock enhancement. In 2010, a total of about 167 million hatchery kuruma prawn juveniles (body length 逸 11. 0 mm) were released through two phases into the Xiangshan Bay, Zhejiang Province. The first batch of 30. 68 million prawn juveniles were released on July 6, while the second batch of about 135. 9 million prawn juveniles were released on July 15-16. In order to evaluate the potential effectiveness of the stock enhancement program, the present study monitored survival, growth rate, and migratory pattern of the hatchery鄄released kuruma prawn in the bay through recapture method monthly. It was necessary for assessing the stocking effectiveness to distinguish the released individuals from natural partners. It was found that there were obvious differences in hatching time and body size between the natural and hatchery kuruma prawn juveniles, and thus we could use cohort analysis with the least鄄squares method to identify released hatchery individuals in the study. The results indicated that the released prawns mainly inhabited in inner or middle part of the Bay where the sediments were sandy or sandy鄄mud substratum. The released juvenile prawns started recruiting to the fishery in mid / late August, and then it might migrate from the Bay to coastal open water for overwintering in October. In mid鄄September, the