New study presents evaporation-driven transport control of
small molecules along nanoslits

Microfluidic chips hold great promise for unparalleled
applications in pathogen detection and cancer diagnosis. Such
devices often require nanoscale thin films for the filtering of
liquid samples, as well as power devices or chemical stimuli that
control its flow direction. However, many challenges still remain
with most precedent mechanisms, including complicated fabrication
processes, limitations of materials, and undesired damage on
samples.