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Cell adhesion properties on photochemically functionalized diamond.

Kwok Feng Chong1, Kian Ping Loh, S R K Vedula

  • 1Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543.

Langmuir : the ACS Journal of Surfaces and Colloids
|April 5, 2007
PubMed
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Diamond surfaces can be engineered for enhanced cell adhesion and growth. Ultrananocrystalline diamond (UNCD) shows superior biocompatibility, supporting neuron cell growth and enabling cell gradient construction for advanced biomaterials.

Area of Science:

  • Biomaterials Science
  • Surface Chemistry
  • Cell Biology

Background:

  • Investigating diamond biocompatibility is crucial for developing advanced biomedical devices.
  • Surface properties significantly influence cellular interactions with biomaterials.

Purpose of the Study:

  • To correlate diamond surface chemistry and topography with cellular adhesion and growth.
  • To compare the biocompatibility of microcrystalline diamond and ultrananocrystalline diamond (UNCD).

Main Methods:

  • Atomic force microscopy (AFM) was used to measure cell adhesion forces.
  • Diamond surfaces were modified via UV irradiation and chemical functionalization (undecylenic acid).
  • Cell growth and neuron cell tethering experiments were performed.

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Main Results:

  • Cell adhesion forces increased on hydrogenated and functionalized diamond surfaces.
  • A direct correlation was observed between initial cell adhesion and subsequent cell growth.
  • UV-treated UNCD exhibited the strongest cell adhesion and superior biocompatibility compared to microcrystalline diamond.
  • Functionalized diamond surfaces supported neuron cell growth via laminin tethering.
  • A polyethylene glycol (PEG) surface gradient was successfully assembled on diamond for cell gradient construction.

Conclusions:

  • Diamond surface engineering significantly enhances cellular adhesion and growth.
  • Ultrananocrystalline diamond (UNCD) demonstrates superior intrinsic biocompatibility.
  • Tailored diamond surfaces can support specific cell types and facilitate the creation of complex cellular structures.