奈米材料之綠色合成法及應用

Green Preparation and Application of Nanomaterials

劉己維(Yang-Wei Lin) ； 林泱蔚(Yang-Wei Lin) ； 黃志清(Chih-Ching Huang) ； 張煥宗(Huan-Tsung Chang)

《化學》 65卷4期 (2007/12) Pp. 419-424

https://doi.org/10.6623/chem.2007042

摘要

本文主要介紹金奈米粒子(gold nanoparticles, Au NPs)及金銀奈米棒 (Au-Ag nanorods, Au-Ag NRs)之綠色合成法與應用。藉由調控不同的成長溶液環境(胺基酸溶液種類、濃度及pH值)合成不同形狀之Au-Ag NRs。由tetrakis(hydroxymethyl)phosphonium chloride 還原金離子而產生之Au NPs(直徑小於3nm)和硫基化合物，如11-巰基十一酸(11-mercaptoundecanoic acid)、癸硫醇(decanethiol)和6-巰基己醇(6-mercaptohexanol)等，反應後可製得金奈米點 (Au nanodots, Au NDs)。Au NDs之放光波長 (501-618 nm)和硫基化合物之碳鏈長度有關。在應用方面，藉由奈米粒子表面電漿共振 (Surface Plasmon Resonance, SPR)的變化及Au NPs之強消光性質，成功地開發出以金及金銀複合奈米材料為主之汞及鉛離子感測器。

關鍵字

綠色化學 ； 金奈米粒子 ； 金奈米點 ； 金銀奈米棒 ； 金屬感測器

並列摘要

In this paper, green approaches for preparation of nanomaterials such as Au-Ag nanorods (NRs) and Au nanodots (NDs), and analytical applications of the as-prepared nanomaterials are focused. By controlling the species, concentrations and pH values of amino acid solutions, differently sized and shaped Au-Ag NRs from gold seeds have been prepared. Au NDs that fluoresce at different wavelengths ranging from 501 to 618 nm have been prepared from the reaction of Au NPs (diameter ＜ 3 nm) with different sizes of alkanethiols or mercaptoalkanoic acids. The small sizes of Au NPs were prepared from reduction of gold ions by tetrakis(hydroxymethyl)phosphonium chloride. The as-prepared Au and Au-Ag nanomaterials have been employed for the determinations of Hg2+ and Pb2+ ions in aqueous solutions by taking advantages of their high surface plasmon resonance absorption coefficients or great quenching efficiency.

並列關鍵字

Au-Ag nanorods ； Au nanodots ； Green chemistry ； Gold nanoparticles ； Nanosensors