Abstract
AbstractSurface gradients provide a powerful platform to accelerate multiscale design by efficiently studying of material–cell interactions to ultimately enhance function of synthetic clinical biomaterials. Herein, a novel orthogonal double gradient is reported in which surface stiffness and wettability vary independently and continuously in perpendicular directions, providing unique combinations of stiffness and wettability over a broad range (stiffness: 6–89 MPa; water contact angle: 29°–90°). It is found that mesenchymal stem cell behavior is nonlinearly regulated by surface stiffness and wettability. These combined stiffness and wettability properties of a material significantly affect stem cell adhesion, spreading, nucleus size, and vinculin expression. This high‐throughput screening system enables elucidation of the relationships between biointerface properties and biological behavior, and thereby serves a potential tool for accelerating the development of high‐performance biomaterials.
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