Polygamous particles.

Area of Science:

• Materials Science
• Nanotechnology
• Biotechnology

Background:

• DNA's specific binding properties are utilized for programming the self-assembly of micro- and nanoscale particles.
• Current DNA-functionalized particles primarily bind specific pairs, limiting complex assembly designs.

Purpose of the Study:

• To design and demonstrate "multiflavored" DNA-functionalized particles capable of binding to multiple distinct particle types.
• To explore the design rules and limitations for creating particles with numerous binding specificities.

Main Methods:

• Development of design rules for multiflavored particles using DNA sticky ends.
• Investigation of the energetic and entropic costs associated with increasing the number of binding flavors.
• Experimental demonstration using 2-μm colloidal particles functionalized with 11-base sticky ends.

Main Results:

• A single particle can bind to 40 different particle types within accessible temperature and time regimes.
• The practical limit for distinct binding sequences is approximately 73, constrained by sequence overlaps and entropic costs.
• Demonstrated a three-particle system forming either a fluid of clusters or an elastic gel based on cooling rate.

Conclusions:

• Multiflavored particles significantly expand the possibilities for DNA-programmable self-assembly.
• This approach enables the creation of complex structures and dynamic materials with tunable properties.
• The findings pave the way for advanced particle assembly systems with unprecedented control.