Breaking Down SERS Detection Limit: Engineering of a Nanoporous Platform for High Sensing and Technology.

In this study, nanoporous gold (NPG) was synthesized by free corrosion dealloying of an amorphous precursor, AuCuAgPdSi (at. %), in a mixture of nitric and hydrofluoric acid, starting from amorphous melt-spun ribbons. NPG revealed a 3D nanoporous structure composed of pores and multigrain ligaments of an average size of 60 nm.