Fig. 2: Surface property evaluation of the IAAG grid.

a XPS spectra of the N 1 s of the GO grid (left) and the Pyr-NHS treated GO grid (right). The light gray line represents the original data while the black line presents the fit. The blue peak represents the N 1 s state of the untreated commercial GO grid, and the orange color scheme represents the new bond state of N 1 s on the Pyr-NHS treated GO surface. b AFM mapping of the GO grid (top) and the IAAG grid (bottom). c NS-EM image of GO grid (left) and Pyr-NHS treated GO grid (right). d NS-EM image of the GO grid (left) and the IAAG grid (right) treated with NZ-1 Fab. It appears that many more Fab densities (small white dots) can be observed on the IAAG grid.