Dictating Nanoparticle Assembly via Systems-Level Control of Molecular Multivalency

Area of Science:

• Materials Science
• Supramolecular Chemistry
• Nanotechnology

Background:

• Nanoparticle assembly relies on multivalent binding interactions between surface ligands.
• Controlling these interactions is crucial for designing complex nanoscale architectures.
• Natural systems demonstrate how molecular arrangement affects binding thermodynamics, but artificial systems lack quantitative examples.

Purpose of the Study:

• To demonstrate how nanoscale geometry can rationally modulate molecular binding thermodynamics in artificial systems.
• To explore the use of nanoscale design features to regulate molecular bonding for nanomaterials synthesis.
• To investigate emergent phenomena in polymer-coated nanoparticles driven by supramolecular bonding and nanoscale structure.

Main Methods:

• Development of a polymer-coated nanoparticle material.
• Utilizing supramolecular bonding and nanoscale structure to dictate multivalent interaction thermodynamics.
• Observing emergent bundling of supramolecular binding groups.
• Controlling superlattice symmetry through mesoscale particle arrangement.

Main Results:

• Demonstrated emergent bundling of supramolecular binding groups not predictable from molecular structures alone.
• Showcased controllable alteration of superlattice symmetry by modifying supramolecular bonding thermodynamics via particle arrangement.
• Established a link between nanoscale geometry, supramolecular bonding, and emergent material properties.

Conclusions:

• Rationally programming molecular multivalency via a systems-level approach is a significant advancement in assembling complex artificial structures.
• This work has implications for future designs of both nanoparticle- and supramolecular-based materials.
• Provides a new design handle for controlling nanomaterials synthesis through nanoscale geometry and molecular interactions.