. Author manuscript; available in PMC: 2010 Feb 24.

Published in final edited form as: ACS Nano. 2010 Feb 23;4(2):689–698. doi: 10.1021/nn901127k

Table 1.

Mechanical and electrical properties of the fibril and mica,⁵⁹ estimated parameters of the contact of tip with the surface.

	Air (F_indentation = 100 nN)		Water (F_indentati on = 0.15 nN)
	Amyloid	Mica	Amyloid	Mica
Young’s modulus	160 MPa	150 GPa	160 MPa	150 GPa
Indentation depth (Hertzian model)	19 nm	0.20 nm	0.25 nm	0.0026 nm
Contact radius (Hertzian model)	28 nm	2.8 nm	3.2 nm	0.32 nm
Contact stiffness (Hertzian model)	9 N/m	840 N/m	1.0 N/m	96 N/m
Dielectric function	~2	7	~2	7