Physicochemical Non-Covalent Coating

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5 Terms

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Solution coatings

Dipping the substrate into the solution with coating material —> removing the substrate and allowing the solvent to dry

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LB Film

Similar to SAM (amphiphilic)

Uses a Langmuir trough

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Advantages and disadvantages of LB film

Advantages

  • Uniformity

  • Many alteration possibilities

Disadvantages:

  • Coating instability

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Surface modifying additives (SMA)

Atoms/molecules added to the bulk material will rise to the top (forming the coating)

The driving force is the reduction of surface free energy

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SMA application

Less use for ceramics due to the limited atomic mobility

More useful in polymers (block copolymer)

Example:

  • Block A: Compatible with bulk polymer

  • Block B: Affinity for surface (providing surface characteristics)