Fig. 5: Programmable co-assembly of SV micelles and silica NPs on surface.
From: Self-regulated co-assembly of soft and hard nanoparticles
a On-surface synthesis of AB dimers and BA2 trimers via step-wise, alternative addition of 60-nm silica NPs and S2160V620 micelles onto S2090V380 micelles preformatively immobilized on a silicon wafer. The S2090V380-micelles-coated silicon wafer was subjected to surface fluorination treatment via exposure to a FDTS vapor in a closed environment to block the association of SV micelles with the bare silicon wafer surface in the subsequent co-assembly process. b–d SEM images of silicon wafers decorated with S2090V380 micelles (b), AB dimers (c), and BA2 trimers (d), respectively. e Preparation of colloidal brushes via a “grafting-to” method simply accomplished by dipping the S2090V380-micelles-coated, fluorinated silicon wafer into an ethanol solution of silica-NPs-capped colloidal oligomers formed by S2090V380 micelles and 67-nm silica NPs. f–g SEM images of silicon wafers decorated with short (f) and long (g) colloidal oligomers, respectively. The white arrows denote the micellar anchors preformatively immobilized on the silicon wafer surface. Scale bars = 500 nm; inset scale bars = 100 nm.
