Gold nanoparticle assemblies significantly enhance optical fields and have been applied for nano-optical devices, biosensing, chemical reactions. The properties of the assembly are, however, less controllable once are fabricated on a solid substrate. An prepared at water-organic solvent interface overcomes this restriction provides flexible photochemical reaction fields. Additionally, physical ...

The evolution of 1st to 3rd generation electrochemical biosensors reflects a simplification and enhancement of the transduction pathway. However, in recent years, modification of the transducer with nanomaterials has become increasingly studied and imparts many advantages. The sensitivity and overall performance of enzymatic biosensors has improved tremendously as a result of incorporating nano...

In the present work, a sensitive spectroscopic assay based on surface-enhanced Raman spectroscopy (SERS) using gold nanoparticles as substrates was developed for the rapid detection protein-protein interactions. Detection is achieved by specific binding biotin-modification antibodies with protein-stabilized 30 nm gold nanoparticles, followed by the attachment of avidin-modification Raman-active...

We report a surface modification protocol to control nanoporous gold (NPG) disk morphology and tune its plasmonic resonance. Enlarged pore size up to !20 nm within 60 s dealloying time has been achieved by adsorbing halides onto alloy surfaces in-between two dealloying steps. In addition, plasmonic resonance has been significantly red-shifted by up to !258 nm by the surface modification. Furthe...

Selective modification of electrode surfaces is a vital step in the development of many practical applications of self-assembled monolayers (SAMs). This paper describes a protection-deprotection strategy similar to that commonly utilized in organic synthesis, with gold oxide as a protecting layer, to direct self-assembly on one gold electrode in the presence of another.

A protocol was developed for preparing magnetic gold nanoparticles via one-step modification with a paramagnetic cationic surfactant. These magnetic gold nanoparticles can bind to and manipulate a low strength magnetic field-based delivery of DNA and proteins powerfully and non-invasively.

Ž . We study the modification of gold thin film surface by Scanning Tunnelling Microscopy STM and grazing incidence X-ray to understand the process of electromigration. As a result of the applied current we have observed by STM a large movement of matter in the film surface that results in a strong rearrangement and modification of all the surface structures in a matter of minutes. We obtained ...