Sodium nitrate (NaNO3), EtOH, and acetone were purchased from Sigma-Aldrich Handels GmbH (Schnelldorf, Germany) in the highest purity available. Polystyrene particlestandards (beads, 3000 Series NanosphereTM Size Standards, 30 nm and 100 nm diameter) were purchased from Thermo Fischer Scientific Inc (Vienna, Austria). The lignins Amallin A and BioPiva 100 used for the preparation of LNP was provided by WestFraser Timber CO. LTD. (Hinton, Alberta, Canada) and UPM Biochemicals (Helsinki, Finland), respectively.