Fluorescent sensor array in a microfluidic chip

Area of Science:

• Analytical Chemistry
• Materials Science
• Microfluidics

Background:

• Miniaturization and automation are crucial for high-throughput processes.
• Micro Total Analysis Systems (µTAS) are a rapidly growing field.
• Developing novel schemes for miniaturized analytical devices is essential.

Purpose of the Study:

• To report the immobilization of self-assembled monolayers (SAMs) with metal ion sensing properties on glass microchannel walls.
• To develop parallel combinatorial synthesis of sensing SAMs for optical sensor arrays and sensing chips.
• To integrate a fluorescent chemical sensor array within a microfluidic chip.

Main Methods:

• Immobilization of self-assembled monolayers (SAMs) on glass microchannel walls.
• Parallel combinatorial synthesis of sensing SAMs in individually addressable microchannels.
• Integration of fluorescent SAMs into a microfluidic chip design.

Main Results:

• Successfully created five different fluorescent self-assembled monolayers.
• Demonstrated the parallel combinatorial synthesis of sensing SAMs.
• Integrated these SAMs onto the internal walls of glass microchannels within a microfluidic chip.

Conclusions:

• A microfluidic chip with an integrated fluorescent chemical sensor array has been developed.
• This approach merges microfluidic device advantages, surface chemistry, parallel synthesis, and combinatorial methods.
• The developed system is suitable for high-throughput metal ion detection using miniaturized analytical devices.