Figure 4
From: Multilayer fabrication of unobtrusive poly(dimethylsiloxane) nanobrush for tunable cell adhesion
Proposed chain structures of mono- and bi-layer PDMS nanobrush. Photochemical oxidation of PDMS nanobrush for stacking multilayer via (a) intra-chain and (b) inter-chain reactions. (c–e) Atomic force microscopy (AFM) images of the PDMS nanobrush layer with increasing UV irradiation time. (c) As-deposited PDMS nanobrush. Upon UV exposure for (d) 60 sec and (e) 180 sec (scale bar = 0.5 μm).
