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光镊作为操纵微小物体的有力工具,通常用来捕获微小物体并控制其运动。利用光镊激光焦点处高度集中的热能量以及光镊的搬运作用,可以精确控制溶液中析出晶体的形状及控制沉淀反应中沉淀颗粒的排列方式,以此可作为制作微型器件的一种手段。分别采用激光诱导快速结晶法和激光辅助沉淀法,制作了以硫酸铜和碳酸钙为基质材料的微型器件。研究了影响晶体析出速度的不同因素,探讨了适于辅助沉淀法生长器件的沉淀反应的类型。相比之下,结晶法生长器件效率高,而沉淀法制作的器件稳定性高。所建立的实验装置和方法拓宽了光镊的应用领域,提供了精细制作微型器件的一种新方法。
Optical tweezers as a powerful tool to manipulate small objects, usually used to capture tiny objects and control their movement. The use of optical tweezers laser focus at a high concentration of heat energy and optical tweezers handling can accurately control the shape of precipitated crystals in the solution and control the deposition of precipitation particles in the arrangement, as a means of making micro-devices. Laser-induced rapid crystallization method and laser-assisted precipitation method were respectively used to fabricate miniature devices with copper sulfate and calcium carbonate as matrix materials. The different factors affecting the rate of crystal precipitation were studied, and the type of precipitation reaction suitable for assisted precipitation growth was discussed. In contrast, the crystal growth efficiency of the device, while the stability of the device produced by precipitation method. The established experimental setup and method have broadened the field of application of optical tweezers and provided a new method for the fine fabrication of micro-devices.