Femtosecond laser direct writing bio-gel template for in situ synthesis of nanoparticles
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摘要: 为了制备具有可控复杂形状和特定化学性质的聚合物微结构，提出了一种飞秒激光直写生物凝胶模板原位合成纳米粒子的方法。首先，采用飞秒激光直写技术加工带有COOH基团的复杂三维结构的生物凝胶模板，用氢氧化钠处理使COOH基团离子化为COO-基团；然后，用金属盐溶液处理，使金属离子与COO-基团螯合，形成纳米粒子结晶核。通过多次循环盐溶液处理步骤，控制模板中纳米粒子的粒径与含量。实验结果表明：所制备的生物凝胶模板具有亚100 nm分辨率和10 m量级尺寸，纳米粒子含量高达9%。该法简单高效，具有很好的应用前景。Abstract: In order to fabricate polymer microstructures with controllable complex shapes and specific chemical properties, we develop a new method using femtosecond laser direct writing biological gel template to synthesis nanoparticles in-situ. First, we use femtosecond laser direct writing complex three-dimensional(3D) bio gel template with COOH groups, followed by treatment with NaOH solution to change COOH groups into COO-. Then, we put the template in metal salt solution, and make the metal particles chelate with the COO- groups to grow into nanoparticles. Through different cycles of this step, the sizes and content of the nanoparticles in the template can be controlled. The experimental results show that the bio gel templates fabricated by this method have sub 100 nm resolution and 10 m order size, and the content of the nanoparticles reaches up as high as 9%. This method is simple and efficient, which has a good application prospect.
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Key words:
- femtosecond laser direct writing /
- bio gel template /
- in situ synthesis /
- nanoparticles
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