Exploring Single-Nanoparticle Dynamics at High Temperature by Optical Tweezers.

The experimental determination of the velocity of a colloidal nanoparticle () has recently became a hot topic. The thermal dependence of is still left to be explored although it is a valuable source of information allowing, for instance, the discernment between ballistic and diffusive regimes. Optical tweezers (OTs) constitute a tool especially useful for the experimental determination of although they have only been capable of determining it at room temperature.