5 papers
Hydrodynamic constraints on the energy efficiency of droplet electricity generators
Cui Wang, Jia Zhou, Antoine Riaud +2
Electric energy generation from falling droplets has seen a hundred-fold rise in efficiency over the past year. However, even these newest devices can only extract a small portion…
Acoustic radiation force on small spheres due to transient acoustic fields
Antoine Riaud, Qing Wang, Zhixiong Gong +2
Acoustic radiation force is a net force experienced by an object under the action of an acoustic wave. Most theoretical models require the acoustic wave to be periodic, if not pure…
Observation of contact angle hysteresis due to inhomogeneous electric fields
Wei Wang, Qi Wang, Jia Zhou +1
Static contact angle hysteresis (CAH) is widely attributed to surface roughness and chemical contamination. In the latter case, chemical defects create free-energy barriers that pr…
On-demand contact line pinning during droplet evaporation
Wei Wang, Qi Wang, Kaidi Zhang +3
Depending on the contact line motion, colloid-rich drolets evaporation can leave a ring-like or a spot-like residue. Herein, we determine this outcome by controlling the contact li…
Trajectory of particles exposed to a tilted-angle washboard potential: application to high-throughput acoustophoresis in microchannels
Wei Wang, Jia Zhou, Antoine Riaud
A wide variety of tilted washboard potentials based on acoustic waves, electric fields, optical patterns and so on have been applied to sort particles in microchannels. In this pap…