Colorimetric Detection of Multiple Phenols Based on Multifunctional Fe O /SnS Composites.

Phenols pose a great threat to human and environment due to their high toxicity and low bio-degradability. Therefore, the development of a rapid and sensitive detection method for multiple phenols is of great importance. Here, a colorimetric detection method based on Fe O /SnS composites was established for the detection and discrimination of ten phenols for the first time.

Directional Droplet Transport Mediated by Circular Groove Arrays. Part II: Theory of Effect.

In the first part of this research, we reported the experimental study of the drop impact on the superhydrophobic circular groove arrays, which resulted in a directional droplet transport. In the second part, we further explored the influence of the Weber number (), ridge height (), and the deviation distance () between the impacting point and the center of curvature on the lateral offset distance (Δ) of bouncing drops. The suggested theoretical analysis is in reasonable agreement with the experimental observations.

Directional Droplet Transport Mediated by Circular Groove Arrays. Part I: Experimental Findings.

Directional transport of liquid droplets is crucial for various applications including water harvesting, anti-icing, and condensation heat transfer. Here, bouncing of water droplets with patterned superhydrophobic surfaces composed of circular equidistant grooves was studied. The directional transport of droplets toward the pole of the grooves was observed.

One-step process for dual-scale ratchets with enhanced mobility of Leidenfrost droplets.

Hypothesis: Droplet depositing onto hot surfaces above the so-called Leidenfrost temperature will float on a cushion of its own vapor. The vapor flow below the drop could be rectified by asymmetric surface textures, resulting the self-propelled droplet motion. Asymmetric structures like ratchets are used to rectify Leidenfrost droplet movement.