Droplet transportation on photosensitive lubricant-impregnated slippery surfaces in response to the light induced Marangoni effect and asymmetrical wetting ridges

Abstract

Light controlled droplet transport on photosensitive lubricant-impregnated slippery surfaces.

Open and closed microfluidics for biosensing

“…Both methods apply direct optical forces to achieve precise droplet manipulation. In addition, light could directly manipulate droplets through optical or light-induced capillary forces by generating a wettability gradient [ 62 ] or Marangoni effect [ 28 , 63 ]. Park et al [ 64 ] integrated a photo-induced dielectrophoresis droplet manipulation platform based on a novel floating electrode optoelectronic tweezer to accomplish several important droplet manipulation functions, including droplet transfer, merging, mixing, as well as parallel, multifunctional, and multiple droplet manipulation.…”

Efficient fabrication of bioinspired soft, ridged-slippery surfaces with large-range anisotropic wettability for droplet manipulation

“…21,22 Unlike superhydrophobic surfaces, Nepenthes pitcher plantinspired slippery surfaces have a firmly attached insoluble lubricant between the droplet and the solid surface, offering a more adaptable platform for manipulating droplets. [23][24][25] The lubricant injection ensures excellent repellence to various liquids with low contact angle hysteresis, while the substantial interfacial tension between the droplet and the lubricant prevents droplets from hard-controlled detaching. Consequently, slippery surfaces with anisotropic wettability have attracted much academic attention.…”