TEM and HRTEM images of the ZnO stalk coated by a ZnO thin film. TEM image of the ZnO stalk coated by a ZnO thin film with a thickness of 15 nm by ALD (a) and the HRTEM image of this sample (b). The layered structure can be observed in the sideward regions of the ZnO stalk, which is corresponding to the coated ZnO films.
Ai et al. Nanoscale Research Letters 2013 8:105 doi:10.1186/1556-276X-8-105