Elasticity and plasticity of two-dimensional amorphous solid layers of beta-lactoglobulin.
We investigate the mechanical properties of a two-dimensional amorphous solid. It is formed spontaneously by the adsorption of a protein (the beta-lactoglobulin) at the surface of water. We measure its mechanical response in both elastic and plastic regimes by applying a point-like force (using a glass fiber). We compare our results with previous measurements of shear moduli using a floating torsion device.
Courty
S
S
Laboratoire de Spectrométrie Physique, UMR 5588 CNRS-Université J Fourier Grenoble 1, BP 87, F-38402 Saint Martin d'Hères cedex, France. sc374@phy.cam.ac.uk
Dollet
B
B
Kassner
K
K
Renault
A
A
Graner
F
F
D003198:Computer Simulation; D003460:Crystallization / Q000379:methods*; D019281:Dimerization; D004548:Elasticity; D006244:Hardness; D006245:Hardness Tests / Q000379:methods*; D007782:Lactoglobulins / Q000737:chemistry*; D046911:Macromolecular Substances; D008422:Materials Testing / Q000379:methods*; D008958:Models, Molecular; D011485:Protein Binding; D011487:Protein Conformation; D013314:Stress, Mechanical; D013499:Surface Properties; D014867:Water / Q000737:chemistry*
D007782:Lactoglobulins; D046911:Macromolecular Substances; D014867:Water