Аннотация:By attaching biomolecules to nanometer-sized bits of semiconductors, researchers have come up with a sensitive and potentially widely applicable method for detecting biomolecules and for scmtinizing biomolecular processes. The novel procedure, developed independently by groups at Indiana University, Bloomington, and the University of California, Berkeley, takes advantage of fluorescence properties of the semiconductor dots. Both groups use nanocrystals—quantum dots—with cadmium selenide cores. The Indiana team wraps their particles in zinc sulfide shells and the California searchers use zinc sulfide or cadmium sulfide shells. Each team has demonstrated that quantumdot- labeled molecules remain active for biochemical reactions and that the tagged species produce brightly colored products [Science, 281, 2013 and 2016 (1998)]. chemical and biological stains, comments Iowa State University chemistry professor Edward S. Yeung. If we consider the importance of the many labeling techniques developed for cell i...
