Fullerene monolayer formation by spray coating.

Area of Science:

• Materials Science
• Nanotechnology
• Surface Chemistry

Background:

• Large molecular complexes often lack the thermal stability required for thin film applications using conventional vapor phase deposition.
• This limitation restricts their use in various technological fields.

Purpose of the Study:

• To develop an alternative, ambient condition method for forming monolayers of large molecules.
• To investigate the feasibility of spray coating for creating thin films of Buckminsterfullerene (C(60)).

Main Methods:

• Development and application of a simple spray coating technique under ambient conditions.
• Deposition of C(60) solutions in toluene and carbon disulfide onto graphite and gold substrates.
• Characterization using atomic force microscopy (AFM) and scanning tunneling microscopy (STM).
• Analysis of structural and electronic properties of C(60) films on Au(111).

Main Results:

• Successful formation of monolayer thick C(60) films on graphite and gold surfaces via spray coating.
• Confirmation of monolayer formation through AFM and STM imaging.
• Spray-coated C(60) films exhibited structural and electronic properties comparable to those obtained via thermal evaporation.

Conclusions:

• Spray coating is a viable ambient condition method for creating high-quality thin films of large molecules like C(60).
• The process relies on a crystallization mechanism facilitated by an ultrathin solution film on the substrate.
• This technique overcomes thermal stability limitations associated with traditional deposition methods.