mt0c00052_si_001.pdf (825.46 kB)
Reconfigurable Surface with Photodefinable Physicochemical Properties for User-Designable Cell Scaffolds
journal contribution
posted on 2020-03-24, 12:36 authored by Wei Hou, Yuli Wang, Yifeng Bian, Junning Zhang, Sen Li, Yi Zeng, Xin Du, Zhongze GuSurfaces
with specific topography and chemical composition are
quite useful in many applications ranging from functional interfaces
to cell incubation scaffolds. Although these surfaces can be easily
fabricated by combining topography-construction methods and surface-functionalization
strategies, their properties are often static after fabrication or
merely switchable between “on” and “off”
states. Developing surfaces that can be on-demand regulated are quite
important for the generation of smart surfaces for future applications.
In this paper, we present a reconfigurable surface with adjustable
topography and chemical functionality utilizing the photodynamic feature
of the disulfide bond. Structured surfaces, composed of disulfide-cross-linked
polymer networks, were prepared by using disulfide-containing methacrylate
as the monomer. We show that the topography and chemical functionality
of the surface can be on-demand regulated after its fabrication, with
254 and 365 nm UV light, respectively, allowing to “define”
the physicochemical properties of the surface using light before the
usage. We also demonstrate the application of such surface as a user-designable
cell scaffold, that different cell scaffolds can be generated from
one original surface with a simple exposure process, to define the
desired bioactivity onto every point of the surface and therefore
exactly control cell behaviors on the scaffold.