Peptide-Directed Assembly of Single-Helical Gold Nanoparticle Superstructures Exhibiting Intense Chiroptical Activity.

ABSTRACT: Chiral nanoparticle assemblies are an interesting class of materials whose chiroptical properties make them attractive for a variety of applications. Here, C₁₈-(PEP_Au^M-ox)₂ (PEP_Au^M-ox = AYSSGAPPM^oxPPF) is shown to direct the assembly of single-helical gold nanoparticle superstructures that exhibit exceptionally strong chiroptical activity at the plasmon frequency with absolute g-factor values up to 0.04. Transmission electron microscopy (TEM) and cryogenic electron tomography (cryo-ET) results indicate that the single helices have a periodic pitch of approximately 100 nm and consist of oblong gold nanoparticles. The morphology and assembled structure of C₁₈-(PEP_Au^M-ox)₂

SUBMITTER: Merg AD 

PROVIDER: S-EPMC5388601 | biostudies-literature | 2016 Oct

REPOSITORIES: biostudies-literature