where E is the Young’s modulus of the paper material, F is
the applied force, δ is the beam deflection, and L, W, and H
are length, width, and thickness of the paper cantilever beam.
The Young’s modulus of the paper material was determined
to be 1.98±0.17 GPa (N=7), which is 66~86 times lower than
that of silicon (130~170 GPa for single crystal silicon).