Figure 4From: Interactive forces between lignin and cellulase as determined by atomic force microscopyRepresentative force curves between the immobilized cellulase system and hydrophobic (polystyrene) tip, chemically modified OH tip, and chemically modified COOH tip. (a) Hydrophobic (polystyrene) tip, (b) chemically modified OH tip, and (c) chemically modified COOH tip.Back to article page