Fig. 5.

AFM images of mica-supported pure DPPC monolayer (A) and 99.8 mol% DPPC + 0.2 mol% hexadecanethiolate-capped Au NPs (C₁₆SAu NPs) (B) at 3mN/m. These monolayers were obtained by Langmuir-Schaefer (LS) deposition technique. Light color represents larger height levels while dark color represents low height levels. The height profiles under the images exhibit different phases displayed in the monolayers. The arrows in the height profiles correspond to those in the insets. In pure DPPC monolayer, large circular LC domain with LE-lipid-filled hole defects (top left in A), small micro LC domains (inset in A) and continuous LE phase are present. In NP-containing monolayer, in addition to LE and LC domains, there are also pinhole defects (darkest color) in both domains (insets in B) and stringe-like C₁₆SAu NPs aggregates (lightest color). The sizes of the main images are 30 μm × 30 μm and those of the insets are 5 μm × 5 μm. [108]. Reprinted with permission from Tatur et al. [108]. Copyright (2012) American Chemical Society.