Fig. 6From: Innovations in biomedical nanoengineering: nanowell array biosensorSEM images of different 3D Au hollow nanostructures. a Au nanobox arrays with ∼ 160 nm inner squares and b Au hollow pillar arrays with ∼ 65 nm inside pores were made using 200 nm square and 100 nm circular pattern molds, respectively [48]Back to article page