Fig. 6From: Nano-mechanical characterization of the wood cell wall by AFM studies: comparison between AC- and QI™ modeComparison of the fast Fourier transform (FFT) image scanned by a QI™ mode and b AC mode (enlargement of Fig. 5j). No color scale is shown as the image information could not be transferred during the FFT. CML compound middle lamella, S 1 , S 12 , S 2 different layers of the secondary cell wall layerBack to article page