Biomedical Engineering Reference
In-Depth Information
Fig. 1
(
a
) Flow diagram of the steps involved in creating nanoporous alumina membranes. (
b
) SEM
of a nanoporous alumina scaffold. Average pore size is 89 ± 12 nm. Anodization voltage was 60 V
controlled by controlling the DC-voltage applied to the leads. There is a theoretical
linear relationship between the voltage and the pore diameter of 1.29 V/nm. The next
step in the process involves etching the aluminum sheet in a solution of 4% chromic
acid and 8% phosphoric acid. The sheet is etched until the entire oxide layer is
