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Updated: May 13, 2026

Cell Patterning on Photolithographically Defined Parylene-C: SiO2 Substrates
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Neuron-like PC12 cell patterning on a photoactive self-assembled monolayer.

Nan Cheng1, Xudong Cao

  • 1Department of Chemical and Biological Engineering, University of Ottawa, Ottawa, Ontario, Canada, K1N 6N5.

Journal of Biomedical Materials Research. Part A
|March 19, 2013
PubMed
Summary

Researchers developed a novel photochemical method using self-assembled monolayers (SAMs) for precise cell patterning. This technique allows controlled surface modification, enabling selective cell adhesion and guiding cell growth for advanced biological applications.

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Area of Science:

  • Biomaterials Science
  • Surface Chemistry
  • Cell Biology

Background:

  • Precise control over cell adhesion is crucial for tissue engineering and biological studies.
  • Existing cell patterning methods often rely on the inherent properties of the base material.
  • Developing new techniques for spatially controlled surface functionalization is essential.

Purpose of the Study:

  • To develop a photochemical approach for creating spatially defined cell-adhesive and non-adhesive regions on a surface.
  • To utilize self-assembled monolayers (SAMs) with photocleavable protecting groups for controlled surface patterning.
  • To demonstrate the efficacy of this method for patterning neuron-like cells.

Main Methods:

  • Fabrication of alkanethiol-gold SAMs functionalized with photocleavable protected amines (NVOC-protected).
Keywords:
SAMcell adhesioncell patterninglamininphoto cleavage

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  • Spatially controlled deprotection of amines using sequential UV exposure through a photomask.
  • Sequential introduction of non-adhesive poly(ethylene glycol) and adhesive laminin.
  • Surface characterization using UV-Vis spectrophotometry, contact angle, AFM, cyclic voltammetry, and XPS.
  • In vitro patterning of PC12 cells on the photoactive surfaces.

    • Main Results:

    • Successful spatial deprotection of amines on the SAM surface was achieved via photo-uncaging.
    • Differential surface properties were created, enabling selective cell adhesion.
    • PC12 cells were successfully patterned into defined structures on the photoactive SAMs.
    • The technique demonstrated independence from the base material's intrinsic adhesive properties.

    Conclusions:

    • This photochemical SAM patterning method offers precise spatial control over surface chemistry for cell patterning.
    • The approach allows for the independent introduction of both cell-adhesive and non-adhesive molecules.
    • This technique provides a versatile platform for creating complex cell arrangements for various biological applications.