Figure 5From: Interactive forces between lignin and cellulase as determined by atomic force microscopyHistogram of AFM measured adhesion forces between the immobilized cellulase system and hydrophobic (polystyrene) tip, OH chemically modified tip, and COOH chemically modified tip. (a) Hydrophobic (polystyrene) tip, (b) OH chemically modified tip, and (c) COOH chemically modified tip. AFM, atomic force microscopy.Back to article page