AuNPs attached onto silicon substrate using chemical functional group. Schematic illustration of the AuNP-coating procedure on the Si substrate and characterization regimes for the chemical interaction between AuNPs and chemical functional groups. (I) AuNPs immobilized on aminated surface (AuNP-SA); (II) AuNPs immobilized on catecholic surface (AuNP-SD) functionalized with dopamine (DOPA). Each sample is quantitatively characterized by experimental toolkits such as cantilever bioassay, PeakForce QNM, as well as lateral force microscopy (LFM).
Lee et al. Nanoscale Research Letters 2012 7:608 doi:10.1186/1556-276X-7-608