自催化反應是將奈米晶種加入充滿Au+的環境下，不需藉由外力使奈米晶種自行成長。本研究利用金奈米粒子特殊的自催化反應製備不同尺寸的金奈米粒子。分別選擇2 nm金奈米粒子和13 nm金奈米粒子還有金奈米棒作為初始材料，加入配製成的成長試劑進行自催化反應，透過不同比例的奈米粒子加入成長試劑之實驗參數，來觀察在兩種不同尺寸金奈米粒子上的自催化反應結果。本研究主要利用紫外光-可見光光譜儀來觀察金奈米粒子成長過程中的特徵吸收峰的變化(尺寸改變與波長位移)，並搭配穿透式電子顯微鏡拍攝的實際粒徑的大小和變化。實驗結果顯示，2 nm金奈米粒子和13nm金奈米粒子以及金奈米棒加入成長試劑後的自催化反應之反應程度不同，主要原因可能是與材料表面能量的差異有關。本實驗目標希望透過實際實驗數據的分析，來精準調控金奈米粒子的自催化反應進而得到目標尺寸的金奈米粒子。
Different sizes of gold nanoparticles to self-catalysis reaction prepared by the special autocatalytic reaction of gold nanoparticles .We use different sizes of gold nanoparticles 2nm,13nm,and gold nanorods were selected as initial materials ,and the prepared growth reagent was added to carry out autocatalytic reaction. Experimental parameters of adding growth reagent through different proportions of nanoparticles, to observe the autocatalytic reaction results on gold nanoparticles of two different sizes.
In this study , Ultraviolet-visible light spectrometer was mainly used to observe the change of characteristic absorption peaks (size change and wavelength shift) during the growth of gold nanoparticles, and the actual particle size and particle size analyzer measured by transmission electron microscope The measured hydration radius was used for data analysis.
The experimental results show that the degree of autocatalytic reaction of 2 nm gold nanoparticles, 13 nm gold nanoparticles and gold nanorods after adding growth reagents is different. The main reason may be related to the difference in the surface energy of the materials. The goal of this experiment is to accurately control the autocatalytic reaction of gold nanoparticles through the analysis of actual experimental data to obtain gold nanoparticles of target size.
The autocatalytic reaction in this study is to add the nano-seeds to the environment full of Au+, without the need for external force to make the nano-seeds grow by themselves.
