Method for generating Marangoni effect

Abstract

The invention discloses a method for generating a Marangoni effect, a method for achieving engraving based on the Marangoni effect and a method for driving liquid to move. The method for generating the Marangoni effect comprises the steps that a light source is used for irradiating or a heat source is close to a solution A, the solution A absorbs energy to generate a local temperature difference, and the Marangoni effect is generated; the solution A is a solution which is strong in photo-thermal absorption and large in surface tension change coefficient along with temperature. Through holes and / or pits in various shapes can be carved, the movement direction of driving liquid can be controlled, vertical, horizontal and inclined movement can be achieved, repeatability is achieved, the application range is wide, the application potential is large, and energy efficiency conversion is high.

Description

technical field

[0001] The invention relates to the technical field of light-controlled fluid movement, in particular to a method for generating the Marangoni effect. Background technique

[0002] The control of liquid droplets and the study of liquid surface films by laser are excellent in non-contact, precision and instantaneous in applications such as microfluidics, physical dehumidification, welding, chemical microreactors and biological science systems. characteristics have aroused extensive interest of researchers. Light-controlled micro-liquid movement, especially the micro-liquid movement driven by photocapillary force, has aroused great research interest of researchers, because light control can achieve non-contact, instantaneous, fixed-point and precise control. Driving liquid motion with light relies on two forces: optical force and photocapillary force. When the photocapillary force drives the movement of a small amount of liquid, it does not require special op...

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