Figure 2From: Nanomechanical characterization of chemical interaction between gold nanoparticles and chemical functional groupsCharacteristics of the AuNPs and surface chemistry of S A and S D . Histogram of AuNP diameters (a) and XPS survey spectra of (b) the aminated Si substrate (SA) and (c) DOPA-functionalized Si substrate (SD). Inset in (a): TEM images of the AuNPs.Back to article page