Proofreading mechanism for colloidal self-assembly

TL;DR

This paper introduces a two-stage proofreading scheme for colloidal self-assembly that enhances yield, robustness, and error correction by using local binding rules and kinetic proofreading inspired mechanisms.

Contribution

The paper presents a novel explicit two-stage proofreading scheme for colloidal assemblies that significantly improves yield and robustness over existing methods.

Findings

Substantial increase in assembly yield and robustness.

Elimination of kinetic traps in the assembly process.

Broader temperature range for high-yield assembly.

Abstract

Designing components that can robustly self-assemble into structures with biological complexity is a grand challenge for material science. Proofreading and error correction is required to improve assembly yield beyond equilibrium limits, using energy to avoid kinetic traps in the energy landscape. Here we introduce an explicit two staged proofreading scheme for patchy particle colloidal assemblies that substantially improves assembly yield and robustness. The first stage implements local rules whereby particles increase their binding strengths when they detect a local environment corresponding to a desired target. The second stage corrects remaining errors, adding a reverse pathway inspired by kinetic proofreading. The scheme shows significant yield improvements, eliminating kinetic traps, giving a much broader temperature range with high yield. Additionally, the scheme is robust against quenched disorder in the components. Our findings illuminate a pathway for advancing programmable design of synthetic living materials, potentially fostering the synthesis of novel biological materials and functional behaviors.