金量子點與金銀量子點製備與光學特性

中文摘要本論文描述在室溫下合成金量子點（Au nanodots）和金銀量子點（Au/Ag nanodots）及其光譜特性。調控還原劑四羥甲基氯化磷（tetrakis(hydroxymethyl)phosphonium chloride, THPC）對金離子的比例以及改變金銀離子比例，可分別合成不同粒徑大小的金奈米粒子或不同金銀組成比例的金銀奈米粒子。將這些奈米粒子與11-巰基十一酸（11-mercaptoundecanoic acid, 11-MUA）反應後，可進一步製備出在不同波長發光的金量子點（500–640 nm）及金銀量子點（456–525 nm）。這些量子點具有螢光生命期長（>250 ns），Stokes shifts大於100 nm等優點，故經過表面修飾生物分子後，將具有生物感測潛在應用價值。

關鍵字

金奈米粒子；金量子點

並列摘要

Abstarct This thesis describes preparation and characterization of wavelength-tunable luminescent Au nanodots (NDs) and Au/Ag NDs at room temperature. Controlling the molar ratios of tetrakis(hydroxymethyl)phosphonium chloride (THPC) to Au ions and that of Ag ions to Au ions, respectively, allows the preparation of different sizes of Au and Au/Ag nanoparticles. Using 11-mercaptoundecanoic acid (11-MUA) to react with the as-prepared nanoparticles allows the preparation of wavelength-tunable luminescent Au nanodots (11-MUA–Au NDs) and Au/Ag nanodots (11-MUA–Au/Ag NDs), respectively. The as-prepared luminescent NDs exhibit a number of attractive optical properties: tunable luminescence wavelengths (456–640 nm), long lifetimes (>250 ns), and large Stokes shifts (>100 nm). These properties suggest that the as-prepared 11-MUA–Au NDs and 11-MUA–Au/Ag NDs would be suitable for use in sensing applications after bio-conjugation.

並列關鍵字

Gold nanoparticles ； Chemical etching ； Wavelength-tunable nanodots ； Tunable luminescence wavelengths ； Au/Ag nanodots

參考文獻

[35] Huang, C. C.; Yang, Z.; Lee, K. H.; Chang, H. T. Angew. Chem. Int. Ed. 2007, 46, 6824–6828.

[37] Huang, C. C.; Chiang, C. K.; Lin, Z. H.; Lee, K. H.; Chang, H. T. Anal. Chem. 2008, 80, 1497–1504.

[2] Schmid, G. Chem. Rev. 1992, 92, 1709–1727.

[3] Schmid, G.; Chi, L. F. Adv. Mater. 1998, 10, 515–526.

[6] Brust, M.; Fink, J.; Bethell, D.; Schiffrin, D. J.; Kiely, C. Chem. Commun. 1995, 1655–1656.

國際替代計量

金量子點與金銀量子點製備與光學特性

全文下載

主題瀏覽