Abstract
We measured velocity distribution of size-regulated fluorescent dendrimers flowing through a 102 nm channel. New method of fluorescence modification of the dendrimer which uses methanol and PEG was proposed to further develop molecular image velocimetry (MIV), which measures the local position and velocity of the dendrimer in the nanochannel. The velocities of the dendrimer qualitatively indicate profile of pressure-driven flow in the nanochannel. Our method will greatly contribute to the fields of nanofluidics, surface chemistry and interface chemistry.