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(a,b) SEM images of ZnO nanoarrays; (c,d) SEM images of ZnO/Ag composite nanoarrays, (e) SERS spectrum of crystal violet adsorbed on ZnO/Ag composite nanoarrays from 10−12 M crystal violet solution, (f) theoretically calculated Raman spectrum of crystal violet. Reprinted with permission from [41]. Copyright 2011 Elsevier.
