Fluorescent Patterns by Selective Grafting of a Telechelic Polymer

Area of Science:

• Materials Science
• Polymer Chemistry
• Surface Chemistry

Background:

• Ultrathin films are crucial for advanced applications.
• Precise control over polymer assembly on surfaces is challenging.
• Fluorescent labeling enables visualization and tracking of polymer structures.

Purpose of the Study:

• To develop a method for preparing patterned ultrathin films of fluorescently labeled polymers.
• To achieve selective grafting of polymers onto specifically functionalized surfaces.
• To create emissive surface arrays for potential applications in sensing or imaging.

Main Methods:

• Synthesis of telechelic poly(methyl methacrylate) (PMMA) via activator regenerated by electron transfer atom transfer radical polymerization.
• End-functionalization of PMMA with fluorescein using copper-catalyzed azide-alkyne cycloaddition (CuAAC) click chemistry.
• Grafting of functionalized PMMA onto silica or glass substrates pretreated with (3-aminopropyl)triethoxysilane (APTES).
• Patterned surface preparation using inkjet printing of APTES.

Main Results:

• Successful preparation of sub-10 nm ultrathin films of fluorescently labeled PMMA.
• Demonstration of selective polymer grafting onto patterned APTES-treated surfaces.
• Creation of well-defined emissive arrays on glass substrates.

Conclusions:

• Inkjet printing combined with click chemistry provides a versatile approach for creating patterned polymer surfaces.
• The developed method allows for the precise assembly of fluorescently labeled polymers into emissive arrays.
• This technique holds promise for fabricating functional surfaces for various advanced applications.