Flexible Molecules Unlock New Nanoparticle Structures
Researchers at MIT and the University of Delaware used super-flexible connector molecules to assemble nanoparticles into previously unseen crystal structures.
Updated on Nov. 3, 2026 in Materials Science
A team of researchers from MIT and the University of Delaware developed a method using flexible connector molecules called ligands to control how nanoparticles link together. The findings were published today in Nature Materials.
Why it matters
Rigid connector ligands and shape-based methods have limited the structures nanoparticles can form and are difficult to scale. A more flexible approach could widen the range of materials that can be engineered.
The study reports a method in which ligands with electrically charged tips bend to connect with oppositely charged ligands on other particles, with connections controlled by nanoparticle size and ligand chain length. The 20-year prevailing rigid-ligand assembly dogma is the baseline the work departs from, and the extraction does not detail the full range of structures tested.
The players
Massachusetts Institute of Technology
A private research university in Cambridge, Massachusetts, known for its engineering and materials science programs.
University of Delaware
A public research university in Newark, Delaware, with active programs in materials and nanoscale science.
The details
The ligands, which have positively and negatively charged tips, reorganize as particles come together, limiting how many neighbors each particle can bind. By changing nanoparticle sizes and ligand chain lengths, the researchers assembled particles into crystal structures not previously observed. The work was supported by the National Science Foundation, the Department of Energy, the U.S. Army, and the U.S. Navy.
Timeline
Paper published November 3, 2026, in Nature Materials
The Big Picture
The work challenges the 20-year rigid-ligand assembly dogma that has guided nanoparticle research, suggesting that flexible connectors can open structures that shape-based and rigid-ligand methods have struggled to reach. It points toward a shift in how materials scientists approach self-assembly across photonics, catalysis, and medicine.
Because the approach could support new materials for photonics, chemical catalysis, medicine, and agriculture, it may eventually influence the performance of products in those fields. The extraction does not indicate near-term commercial availability, so practical effects remain prospective.
The takeaway
Flexible connector molecules offer a route to nanoparticle structures that rigid designs could not reach, which may matter for future materials across several industries. Readers following materials research should watch for follow-up work testing these structures in applied settings.
Further reading
Explore more on Materials Science to see how researchers are engineering matter at the nanoscale.
Source note: This article includes information reported by AZoNano.
