title: High-yield synthesis and optical response of gold nanostars.
abstract: Multipod Au nanoparticles (nanostars) with single crystalline tips were synthesized in extremely high yield through the reduction of HAuCl(4) in a concentrated solution of poly(vinylpyrrolidone) (PVP) in N,N-dimethylformamide (DMF), in the presence of preformed Au nanoparticle seeds, but with no need for external energy sources. Nanostar dispersions display a well-defined optical response, which was found (through theoretical modeling) to comprise a main mode confined within the tips and a secondary mode confined in the central body. Calculations of the surface enhanced Raman scattering (SERS) response additionally show that this morphology will be relevant for sensing applications.
authors: Departamento de Química Física and Unidad Asociada CSIC-Universidade de Vigo, 36310 Vigo, Spain.
authors: Pandian
authors: P
authors: Senthil Kumar
authors: Isabel
authors: I
authors: Pastoriza-Santos
authors: Benito
authors: B
authors: Rodríguez-González
authors: F
authors: F
authors: Javier García de Abajo
authors: Luis M
authors: LM
authors: Liz-Marzán