Layered Heterostructures from Nanoparticle-Mediated Assembly of Protein-Modified Peptoid Nanosheets
February 8, 2021
Crystalline peptoid nanosheets prepared at equimolar concentrations of Nbpe₆Nce₆ and MAL-Nbpe₆Nce₆ monomers are reacted with silica-binding derivatives of superfolder green fluorescent protein engineered with the G51C/C48S substitutions. 10-nm silica nanoparticles drive the self-assembly of a multilayer material with alternating compositions.
2D peptoid nanosheets functionalized with silica-binding proteins self-assemble into a material with alternating peptoid, protein and inorganic layers upon addition of silica nanoparticles.
Significance and Impact
This work demonstrates a path for facile and modular fabrication of multi-component hierarchical materials.
The placement of cysteine residues on solid-binding proteins is optimized to maximize reactivity with peptoid nanosheets prepared with an equimolar amount of maleimide-modified peptoid oligomers.
Addition of silica nanoparticles triggers stacking of these 2D nanostructures into a 3D multilayer material.
Inorganic adhesion zones can be patchy or continuous depending on protein concentration.