The roles of silver ions and halides (chloride, bromide, and iodide) in the seed-mediated synthesis of gold nanostructures have been investigated, and their influence on the growth of 10 classes of nanoparticles that differ in shape has been determined. We systematically studied the effects that each chemical component has on the particle shape, on the rate of particle formation, and on the che...

Metallic nanoparticles of gold functionalized with oligonucleotides conventionally use a terminal thiol modification and have been used in a wide range of applications. Although readily available, the oligonucleotide-nanoparticle conjugates prepared in this way suffer from a lack of stability when exposed to a variety of small molecules or elevated temperatures. If silver is used in place of go...

A novel impedance-based thermoplastic flow-through immunosensor is presented which integrates a porous polymer monolith capture element with an interdigitated electrode array (IDA). The technique employs a volumetric impedance sensing zone and a direct assay with secondary antibody labeled gold nanoparticles (Ab-AuNP). The captured gold nanoparticles are silver enhanced causing an impedance dro...