These are some of the physics related applications
Conductive Applications: Silver nanoparticles are used in conductive inks and integrated into composites to enhance thermal and electrical conductivity.
Optical Applications: Silver nanoparticles are used to efficiently harvest light and for enhanced optical spectroscopies including metal-enhanced fluorescence (MEF) and surface-enhanced Raman scattering (SERS).
Conductive Coatings: Silver nanowires can be used to provide conductive coatings for transparent conductors and flexible electronics.
Plasmonic Antennas: Metallic nanoparticles attached to silver nanowires function as antennas enhancing plasmonic activity for sensing and imaging applications
Molecular Sensing: Single layers of silver nanowires have been used to construct arrays for molecule specific sensing in conjunction with Raman Spectroscopy.
Nanocomposites: Silver nanowires have been studied as components of nanocomposites and can show high dielectric constants in such systems.
Silver nanoparticles can be incorporated into paints, and bio matrices for anti-bacterial applications. In physics they can be used in thin films to block/absorb light when coupled with photoreactive metal oxides.
Gold nanoparticles is a huge area. Green synthesis of Au NPs deserves some efforts, especially if convenient isolation and storage is developed. My favorite topic is application of dynamic physical properties to control activity in catalysis. http://dx.doi.org/10.1021/ja311258e
These are some of the physics related applications
Conductive Applications: Silver nanoparticles are used in conductive inks and integrated into composites to enhance thermal and electrical conductivity.
Optical Applications: Silver nanoparticles are used to efficiently harvest light and for enhanced optical spectroscopies including metal-enhanced fluorescence (MEF) and surface-enhanced Raman scattering (SERS).
Conductive Coatings: Silver nanowires can be used to provide conductive coatings for transparent conductors and flexible electronics.
Plasmonic Antennas: Metallic nanoparticles attached to silver nanowires function as antennas enhancing plasmonic activity for sensing and imaging applications
Molecular Sensing: Single layers of silver nanowires have been used to construct arrays for molecule specific sensing in conjunction with Raman Spectroscopy.
Nanocomposites: Silver nanowires have been studied as components of nanocomposites and can show high dielectric constants in such systems.