25th anniversary article: CVD polymers: a new paradigm for surface modification and device fabrication

Area of Science:

• Materials Science
• Polymer Chemistry
• Surface Engineering

Background:

• Thin polymer coatings are crucial for advanced technological applications.
• Conventional coating methods face limitations with certain substrates and polymer types.
• Need for versatile, solvent-free coating techniques is increasing.

Purpose of the Study:

• To explore the capabilities of Chemical Vapor Deposition (CVD) polymerization for creating functional polymer coatings.
• To demonstrate the applicability of CVD polymerization across a wide range of substrates.
• To highlight the advantages of CVD polymerization over traditional methods.

Main Methods:

• Monomers are delivered in the vapor phase to the substrate surface.
• Simultaneous polymerization and thin film formation occur on the substrate.
• Initiated-CVD and oxidative-CVD techniques are employed for specific polymer types.

Main Results:

• Achieved well-adhered, conformal, thin (<100 nm) polymer coatings.
• Demonstrated successful room-temperature modification of organic, inorganic, rigid, flexible, planar, and porous substrates.
• Enabled coating of insoluble polymers and prevented substrate damage from solvents.
• Showcased interfacial engineering, real-time monitoring, and thickness control.
• Initiated-CVD yielded engineered materials for controlled molecular interactions.
• Oxidative-CVD proved effective for depositing organic conducting and semiconducting polymers.

Conclusions:

• CVD polymerization is a versatile and effective technique for fabricating advanced polymer coatings.
• The method offers significant advantages, including substrate compatibility and solvent-free processing.
• CVD polymerization enables precise control over material properties and surface functionalities.