Titanium nitride (TiN) nanoparticles represent interesting materials with surface plasmon resonances in the visible to near infrared spectrum. TiN is biocompatible and chemically inert, making TiN nanoparticles attractive as biomedical photoacoustic imaging probes or for optical and photonic components. Today, the synthesis of TiN nanoparticles is typically performed at high temperatures between 700-1200°C or requires sophisticated vacuum technologies (CVD, plasma arc). The morphology of the particles is often ill defined, with round particles to cuboidal shapes and the syntheses lead to polydisperse sets of nanoparticles.
We will present a low temperature (~270°C) solution-based synthesis of TiN nanoparticles, leading to monodisperse cuboidal particles with large crystal domains. The size can be tuned between 5 and 100 nm and we will investigate the optical characteristics of these TiN nanoparticles. The synthesis will allow for better quality and availability and of TiN nanoparticles and in situ surface modification will enable more widespread application leading to facile generation of hybrid TiN core/organic shell structures also for the area of biomedical imaging.