Extracting structural information of Au colloids at ultra-dilute concentrations: identification of growth during nanoparticle immobilization

This paper describes the structural characterization of ultra-dilute colloidal Au nanoparticle solutions using X-ray absorption spectroscopy (XAS) and the particle growth during immobilization.

Exploiting the chemical differences between Ag and Au colloids allows dramatically improved SERS detection of “non-adsorbing” molecules

Switching from Ag to Au colloids allows SERS of ‘non-adsorbing’ analytes such as naphthalene to be detected at ≥10−8 M.

Rapid water/oil interfacial self-assembled Au monolayer nanofilm by simple vortex mixing for surface-enhanced Raman scattering

In this work, a facile surface-enhanced Raman scattering (SERS) substrate formed on a water/oil interface was prepared by adding n-hexane to Au colloids through simple vortex mixing without the involvement of any organic additives.

Mechanism for the photoreduction of poly(vinylpyrrolidone) to HAuCl4 and the dominating saturable absorption of Au colloids

Au nanoparticles are controllably photo-fabricated in ethanol by using poly(vinylpyrrolidone) as both reducing and protective agent.

Design and fabrication of surface-enhanced Raman scattering substrate from DNA–gold nanoparticles assembly with 2–3 nm interparticle gap

This study provides a one-step strategy for preparing DNA–Au hybrids as SERS-active substrates by the simple mixing of DNA and Au colloids.