Optical sequencing of single synthetic polymers

Area of Science:

• Polymer Chemistry
• Chemical Imaging
• Materials Science

Background:

• Microscopic sequences of synthetic polymers are critical for material properties but difficult to measure.
• Traditional methods cannot access the detailed sequence information of individual polymer chains.

Purpose of the Study:

• To develop a real-time optical sequencing method for single synthetic copolymer chains.
• To investigate the kinetics and sequence distribution during living polymerization.

Main Methods:

• Utilized coupled reaction approach toward super-resolution imaging (CREATS) for multi-color imaging.
• Achieved single-monomer resolution imaging of polymer growth from single catalysts.
• Employed single-molecule localization microscopy at high reactant concentrations.

Main Results:

• Demonstrated real-time optical sequencing of individual synthetic copolymer chains.
• Observed temporal fluctuations in chain propagation kinetics with memory time and chain-length dependence.
• Quantified block copolymer formation and block size distribution in individual chains.

Conclusions:

• The developed CREATS method enables real-time, single-monomer resolution sequencing of synthetic polymers.
• This capability allows for detailed analysis of sequence-dependent polymer properties and block copolymer formation.
• Paves the way for single-chain-level structure-function correlation studies in polymer science.