Fig. 2From: Layer-by-layer assembled polymeric thin films as prospective drug delivery carriers: design and applicationsSchematic illustration of the LbL assembly method using BPEI, HA, and gold NPs. General strategy for the preparation of the (BPEI/HA/gold NPs/HA)n (n = number of tetralayers) structure-based nanoporous films, and subsequent ova release under model physiological conditions. (Reprinted with permission from Ref. [49]. Copyright 2016, Elsevier)Back to article page