Fig. 6From: Towards sustainable production and utilization of plant-biomass-based nanomaterials: a review and analysis of recent developmentsReproduced with permission from The Royal Society of Chemistry©AFM images (a1–d2) and AFM-measured height distributions (e1 and e2) of CNFs from concentrated p-toluenesulfonic acid (left panel, from Bian and co-workers [72]) and maleic acid (right panel, from Cai and co-workers [45]) hydrotropic fractionated birch wood solids.Back to article page