Abstract:

Atomic force microscope and nanoindentation have become important tools for the research of wood material at micro and nano-level scale. In this paper, the characteristic parameters and nanoindentayion of Populus adenopoda cell wall were measured based on AFM and indentor. The results showed that the mean width of P. adenopoda cell wall was 2.230 μm, the mean length was 9.498 μm, and the mean diameter was 19.732 μm. The indents made on the S₂ layer of P. adenopoda cell wall, the mid-width of the cell wall, were all effective nanoindentation tests, which could be used to represent the elastic modulus and hardness of the whole P. adenopoda cell wall. The means of elastic modulus and hardness of P. adenopoda cell wall were 18.52 GPa and 478.59 MPa, respectively.

Key words: atomic force microscope, nanoindentation, Populus adenopoda, elastic modulus, hardness