潛弧奈米合成系統製備金奈米顆粒之研究

The Preparation of Gold Nanoparticles by Submerged Arc Nanoparticles Synthesis System

田德之(Der-Chi Tien)

指導教授 ： 鐘清枝

國立臺北科技大學/機電學院/機電整合研究所/碩士(2006年)

摘要

對在目前研究領域裡，奈米金顆粒之特性與製造是相當熱門的題目之一，其主要原因是金顆粒在奈米尺度下具有一些獨特的光學、電學、觸媒與其他的特性，未來可應用在相當多的地方。迄今製造金奈米顆粒的方法有相當多種，例如：光分解法、放射還原法、超音波還原法、化學還原金屬鹽類等等方法。然而，奈米金在應用時還是有些問題存在，那就是穩定性不高且容易團聚而失去原有的奈米金特性。目前解決此問題的方式是，如果在奈米金顆粒表面，包附上一層穩定劑，如此一來就可以讓顆粒表面帶有電位，讓顆粒間產生足夠排斥力而避免再度聚集，達到保護奈米顆粒之目的。
本研究主要是使用潛弧奈米合成系統(SANSS)，用來製造未加任何穩定劑之奈米金顆粒。應用此創新的方式，我們已經可以相當成功的將奈米金製作於純水當中，且無需加入任何穩定劑或浮懸劑。接著就針對奈米金顆粒之特性做下列分析，包括：粒徑分佈、表面電位、光譜分析、TEM/SEM分析、XRD分析等等。在光譜分析上我們可以證明水相浮懸之奈米金表面上特有的電漿反應，而在TEM/SEM分析上可得粒徑約在20~50奈米，於XRD分析上發現奈米金的結晶結構，並於EDXS分析上證明奈米金的存在。
經由實驗可證明，使用潛弧奈米合成系統(SANSS)來製造奈米金於純水中，具有有成本低、效率高，還對環境友善，沒有污染問題。

關鍵字

奈米 ； 電弧放電

並列摘要

Nanoparticles study has become the target of novel interest in science and the fabrication and characterization of colloidal gold nanoparticles have attracted considerable attention as a result from both fundamental and applied research due to their unique optical, electrical and catalytic properties and other properties. To date, many process including photolysis or radiolysis of metal salts, ultrasonic reduction of metal salts, chemical reduction of metal salts, etc., have been used to prepare gold nanoparticles. However, the stability of colloidal gold is a major bottleneck to practical applications because colloidal particles tend to aggregate in solution. One of the strategies is to protect colloidal gold with stabilizer, which can interact at the particle surface to form a zeta potential barrier, which can form a repel force in order to lead colloidal gold separated from each other, and also preventing them from agglomeration.
Without stabilizer, the preparation of gold nanoparticles synthesized by the Submerge Arc Nanoparticles Synthesis System (SANSS) is proposed for this study. By this innovative system approach, synthesis of Gold nanoparticles in deionized water has been successfully established. The aim of this work to characterize gold nanoparticles, including the size distribution, Zeta Potential, thus suggests that gold nanoparticles suspend in deionized water as colloidal form. The UV-vis absorbance demonstrates the unique surface plasmon resonance of Au nanoparticles suspended in deionized water. Microstructure of nano-sized gold particles examined by TEM and SEM shows the particles size around 20~50nm, as determined by XRD, crystalline structure of nano-scale gold deposit on quartz surface clearly show its unique finger print, along with EDXS the chemical composition of Gold nanoparticles have been proved.
The experimental results suggest that fabrication of the Gold nanoparticles in deionized water without surfactant by the Submerge Arc Nanoparticles Synthesis System (SANSS) is alternative, inexpensive, effective and environmentally friendly method.

並列關鍵字

Gold Nanoparticle ； SANSS

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