Enriching nanoparticles in an aqueous solution is commonly practiced for various
applications. Despite recent advances in microfluidic technologies, a general method to
concentrate nanoparticles in a microfluidic channel in a label free and continuous flow
fashion is not yet available, due to strong Brownian motion on the nanoscale. Recent
research of thermophoresis indicates that thermophoretic force can overcome the Brownian
force to direct nanoparticle movement. Coupling thermophoresis with natural convection on …