Gold Nanoparticles Mineralized by Peptide Liquid Crystals with Dual-Functional Enzyme-like Activities: An Automatic Membrane Reactor for Glucose Detection.

The development of stable multifunctional enzyme mimics with tandem catalytic effects provides a great opportunity to construct economical and convenient bioassays. Inspired by biomineralization, in this work self-assembled -(9-fluorenylmethoxycarbonyl)-protected tripeptide (Fmoc-FWK-NH) liquid crystals were used as templates to in situ mineralize Au nanoparticles (AuNPs), and then a dual-functional enzyme-mimicking membrane reactor based on AuNPs and peptide-based hybrids was constructed. AuNPs with a uniform particle size and good dispersion were in situ reduced on the surface of the peptide liquid crystal due to the reduction of the indole group on the tryptophan residue, which exhibited excellent peroxidase-like and glucose oxidase-like activities simultaneously.