Precise modulation of polymer brush in its thickness and grafting density can cause unexpected cell behaviors and regulated bioactivities. Herein, a nanoscale poly(dimethylsiloxane) (PDMS) brush was employed to use as a controllable material for cell adhesion. Facile fabrication of ultrathin monolayer PDMS nanobrush on an underlying substrate facilitated regaining cell adhesion through long-range cell attractive forces such as the van der Waals forces. We showed that cell adhesion is diminished by increasing the number of nanobrush layers, causing a gradual decrease of the effectiveness of the long-range force. The result demonstrates that ultrathin PDMS nanobrush can either promote or inhibit cell adhesion, which is required for various biomedical fields such as tissue-engineering, anti-fouling coating, and implantable biomaterials and sensors.
Bibliographical noteFunding Information:
This research was supported by the Bio & Medical Technology Development Program (NRF-2015M3A9B6027820 to H.W.K.), and Brain Research Program (NRF-2018M3C7A1057313 to H.W.K.) funded through the NRF by the Korean government (MSIP). It was also supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (2017R1D1A1B03034774 to J.J.) and Hannam University Research Fund (2017) to J.J. This research was also supported by Korea Ministry of Science and Technology through KK1802-C00, KNI1801, and IJ18-07 to J.K.P.
© 2019, The Author(s).
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