28711.5 Soft photolithography of hydrogel micropatterns
from Rockwood Electronic Materials (Derbyshire, UK). The silanization procedure
was performed according to the protocol described in published literatures [26, 27].
The glass coverslips were heated in ‘piranha’ solution which is a mixture of aqueous
solutions of 50% (v/v) sulphuric acid (3 parts) and 30% (w/v) hydrogen peroxide
(1 part) for 10 min in a ventilated acid hood. The piranha solution was handled with
extreme care as it reacts violently with organic materials. Rubber gloves and per-
sonal protective safety clothing were used while handling the piranha solution. After
10 min, the ...
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