Particles for multiplexed analysis in solution: detection and identification of striped metallic particles using...

Area of Science:

• Materials Science
• Nanotechnology
• Analytical Chemistry

Background:

• Submicrometer metallic particles with patterned surfaces are valuable for various applications.
• Distinguishing between different particle patterns is crucial for their effective use.
• Current identification methods may have limitations in accuracy and scalability.

Purpose of the Study:

• To demonstrate the optical distinguishability of cylindrical metallic particles with submicrometer striping patterns.
• To assess the accuracy of particle identification based on synthesis reproducibility and microscope limitations.
• To present a library of diverse striping patterns and evaluate their identification accuracy.

Main Methods:

• Fabrication of cylindrical metallic particles with various submicrometer striping patterns (Au and Ag).
• Characterization and identification of particles using optical microscopy.
• Evaluation of identification accuracy against the number of synthesized patterns.
• Demonstration of surface chemical modification for bioanalytical applications.

Main Results:

• Over 100 different striping patterns have been successfully produced.
• More than 70 patterns can be identified with greater than 90% accuracy using optical microscopy.
• The chemical modification of particle surfaces for bioanalytical measurements is feasible.

Conclusions:

• Optical microscopy is an effective tool for distinguishing between numerous submicrometer striped metallic particle patterns.
• High identification accuracy is achievable, particularly for particles with gold and silver stripes.
• Further improvements in manufacturing and identification processes are expected to increase pattern diversity and accuracy.