利用斷鍵-成核-長晶法將金屬奈米粒子合成在不同的聚合物基材上

Abstract

本研究探討如何在不同的聚合物基材上鑲嵌各種不同的金屬奈米粒子。此法利用氧氣電漿處理將聚合物表面活化，之後浸入金屬前驅物溶液，便可於聚合物表面原位還原生成金屬奈米粒子。這項技術仰賴於氧氣電漿活化過程中聚合物表面之化學鍵斷鍵，並於表面所生成之帶有自由基活性物種。這些自由基的存在促使金屬離子於介面上發生還原反應並產生金屬核種，同時能均勻地分布鑲嵌於聚合物之表面上。而隨著持續性之還原沉積，最終聚合物表面將形成單或多層覆蓋之金屬奈米粒子層。架構於先前我們實驗室已經合成出鈀和銀奈米粒子的基礎，本研究利用此斷鍵-成核-長晶法更進一步成功合成了鉑、釕、鎳和金的奈米粒子，並將這些金屬奈米粒子之承載基材成功拓展至聚對苯二甲酸乙二酯薄膜、聚丙烯微量離心管和三聚氰胺海綿等三類聚合物。

We have successfully synthesized different metal nanoparticles on various polymer substrates via the Break-Seed-Growth process. The polymer surface is first activated by oxygen plasma, and then immediately immersed into the metal precursor solution for in situ metal particle growth. During the activation process, chemical bonds of the polymer break, and active species rendering free radicals are formed on the polymer surface. These free radicals promote the reduction of metal ions to produce metal seeds that are evenly distributed on the polymer surface. After a continuous reduction process, single or multiple layers of metal nanoparticles can be formed on the polymer surface. While previous studies reported the successful production of palladium and silver nanoparticles on the polymer substrate, here the break-seed-growth process has been further extended to platinum, ruthenium, nickel, and gold nanoparticle generation. Furthermore, three distinct polymer substrates are also demonstrated, including polyethylene terephthalate films, polypropylene microcentrifuge tubes, and melamine sponges.