在九十五學年度高中職化學教材增加奈米材料課程之際，本研究之目的是利用高中職實驗室有限的儀器為高中職奈米課程設計一套具有啟發性及可實際操作的簡易奈米粒子製備實驗。主要設計方向有二種：其一應用電化學還原之原理，電解後可以得到黃褐色銀奈米粒子溶液；另一利用金屬鹽類(AgNO₃)，以加入還原劑(HCOH 甲醛)還原之，亦可得到黃褐色銀奈米粒子溶液。在高中職實驗器材諸多限制下，可以利用雷射筆照射時的散射現象及溶液呈黃褐色來判定銀奈米粒子的存在。研究過程中也利用紫外可見光光譜儀(UV-Vis)及穿透性電子顯微鏡(TEM)加以證實上述簡易方法可做出銀奈米粒子。
As the nanomaterials curriculum is going to be integrated with the chemistry curriculum of senior high schools and vocational high schools in 2006, this work aims to design a series of nanoparticle reparation experiments that are practical for senior high school and vocational high school students. Due to limited resources in most senior high schools and vocational high schools, we design two simple experiments to prepare silver nanoparticles. One is through chemical reduction reaction and the other is by lectrochemical reduction. For the electrochemical method, the anode is Ag and the cathode is Pt. After electrolysis, the solution appears brownish-yellow. The chemical reduction method utilizes a reductant (HCOH) to reduce AgNO₃ , by which the solution also appears brownish-yellow. Our results show that students in senior high school and vocational high school can prepare sliver nanoparticles by simple methods and demonstrate their results through light scattering and observation of color change. Meanwhile, we have utilized UV-visible spectrometer and transmission electron microscope (TEM) to verify that silver nanoparticles were formed in both procedures.
