Nature Communications, Published online: 29 August 2026; doi:10.1038/s41467-026-77269-7 Developing biomass-derived self-assembly systems for controlling carbon morphology remains challenging because of their intrinsic heterogeneity, which hinders controllable assembly. Here, the authors report a biomass-enabled reactive-emulsion-mediated strategy for converting liquefied wood into various mesoporous carbon nanomaterials.