Figure 2. TEM (a) and AFM (c) images of nanofibrils obtained by peracetic treatment of aspenwood, after 6 passes (1+5) throught the microfluidizer. Fibril width distribution (d) obtainedfrom AFM height profiles. (b) Based on data from nanofibril dimension and hemicellulose content, a sketch of holocellulose nanofibrils showing the hemicellulose “shell” coating on the cellulose “core” structure is proposed.