Polymer-controlled crystallization of dumbbell-like ZnO hollow architectures

Dumbbell-like ZnO hollow architectures have been achieved on a large scale by a facile solution-based method by using water-soluble polymer (poly(sodium 4-styrenesulfonate)) as crystal growth modifier. The as-prepared ZnO architectures were in fact assembled by numerous sheet-like particles with an average size of ~ 10 nm. Studies found that the existence of PSS played an important role in the formation of these unique ZnO microstructures. The possible formation mechanism has been discussed based on the experimental results and the function of organic molecules. The hollow ZnO architectures exhibit unique photoluminescence characteristics at room temperature, suggesting promising potential for optoelectronic applications.