Integrated single-fiber droplet manipulator

Abstract

The invention provides an integrated single-fiber droplet manipulator. The integrated single-fiber droplet manipulator is characterized in that the device is composed of a section of multi-core optical fiber comprising a cladding and a fiber core, the fiber end is ground to form a cone frustum fiber end, the end face of the cone frustum fiber end is provided with a layer of liquid injection smoothporous surface film doped with a photosensitive material, and the film is provided with an array groove structure filled with a lubricating agent; when light waves transmitted by the fiber core are reflected by the cone frustum fiber end and then gathered to the liquid injection smooth porous surface film on the end face, the light waves are absorbed and converted into heat energy by the photosensitive material, a temperature gradient field is formed in an irradiation area, droplets attached to the liquid injection smooth porous surface film generate wetting gradient force under the influenceof the temperature gradient field, the droplets are affected by force, the posture of the droplets changes to generatesdirectional sliding, and finally, the droplets are controlled under the action of different temperature gradient fields by controlling the power of the light injected into the fiber core. The manipulator can be applied to the fields of hydromechanics, biology, medicine and the like.

Description

[0001] (1) Technical field [0002] The invention provides an integrated single optical fiber droplet manipulator, which can be used in the fields of fluid mechanics, biology, medicine and the like. [0003] (2) Background technology [0004] As a new information functional material, optical fiber is superior to other functional materials because of its long transmission distance, fast transmission speed, low loss, strong anti-interference ability, live detection, high sensitivity, fast response speed, and strong biocompatibility. With the advantages, it has become a new favorite in the fields of biology, chemistry, laser and sensing in recent years. Scientists realize functions such as optical tweezers, light manipulation, and light detection by designing antennas and films with various microstructures at the fiber end. [0005] There are a variety of natural superhydrophobic surfaces with micro-nano composite structures in nature. For example, the microstructure on the surfa...

AI Technical Summary

Problems solved by technology

But the device is not portable, but energy-hungry

Moreover, the inherent fluidity and volatility of ferrofluids may reduce the lifetime of the resulting system; scientist Heng's team prepared a porous conductive film that can achieve electrically driven droplet motion by changing the voltage, and explored the effect of lubricant viscosity on The influence of self-healing performance (Journal of Materials Chemistry, A. Materials for energy and sustainability, 2018, 6, 2414-2421); the team of scientist Hu prepared a dynamically driven liquid-injected porous elastic film, which realizes liquid Control of droplet kinetics (Advanced Functional Materials, 2018, 28, 1802622.)

However, the above-mentioned devices require complex external energy input, such as additional electrical energy when applying a voltage to the photoelectric synergistic responsive material, which is inconvenient for manipulating biological droplets.

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