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Example of LMPNP produced by the aerosol flow system shown in Figure 3. On the left, spherical, dry, and smooth lignin particles with sizes in the micrometer range (scale bar = 3 μm). On the right, a SEM image of LMNPs (scale bar = 200 nm) showing surface wrinkling, which can be produced by adjusting the operation conditions in the unit. Adapted with permission from ref (44) (Copyright 2018 The Royal Society of Chemistry).
