透過您的圖書館登入
IP:13.58.39.23
  • 學位論文

利用 QCM 生物感測器偵測生物素濃度之研究

Measurement of the Biotin Concentration Using QCM Biosensors

指導教授 : 張耀仁

摘要


石英微量天秤(Quartz Crystal Microbalance)是利用質量負載(Mass-Loaded)原理,藉由生物辨識層的薄膜,可以將被偵測的蛋白質(抗原或抗體),利用分析儀器準確辨識出濃度。本論文主要研究出一新型的QCM生物感測器,利用電鍍技術將鎳鈷合金沉積於基頻為10MHz的AT-cut切角的石英晶體表面上。由於鎳鈷金屬會與修飾過His-tagged後的蛋白質產生專一性的親和性吸附,運用此免疫機制,將生物素(Biotin)固定於QCM鎳鈷金屬層上,經由阻抗分析儀器量測頻率的結果,可以發現不同的生物素濃度對應到不同的頻率下降量。除此之外,在螢光檢測方面利用硝化纖維薄膜(NC membrane)與QCM生物感測器以免疫學分析方法以及高靈敏度LSIV機台檢測螢光影像,並驗證此QCM 生物感測器確實具有生物素吸附之效果。 此生物感測器的優點包含以下幾點: (1)檢測物質不受限制,偵測方式主要根據QCM 振盪器之原理,進行頻率量測; (2) 減少檢體的浪費,本研究每點樣本僅需6μl即可進行實驗; (3) QCM 可以重複使用,使用經稀釋過後的3%硝酸可將鎳鈷金屬層移除掉,可以進行重複實驗; (4) 成本低廉,使用現今純熟的電鍍技術將可大量製造生物感測器,以減少成本支出。

並列摘要


Quartz crystal microbalance (QCM) which makes use of the mass-load theorem by biologic recognition component can detect protein concentration accurately. This paper presents a novel Ni-Co alloy coated QCM biosensor fabricated by electroplating nickel and cobalt on the surface of 10-MHz AT-cut QCM. The biotin was immobilized on the coated surface by the affinity mechanism of Ni-Co alloy. Then, the immunoreactions can be performed on the QCM biosensors. The results show that the Ni-Co alloy coated QCM biosensor can provide specific binding with His-tagged biotin. For different biotin concentrations, the QCM produced different frequency shifts. In addition, fluorescent detection was also performed to show that the coated Ni-Co film has better nonspecific binding ability than nitrocellulose (NC) membrane to immobilize His-tagged proteins for target analyses. The advantages of this biosensor include (1) label-free detection based on the principle of QCM resonator; (2) minimal sample consumption (6 l of biotin each drop used in this study); (3) QCM is reusable the coated Ni-Co alloy can be removed by 3% nitrate acid, so that the QCMs can be re-electroplated as biosensors; (4) inexpensive fabrication process, the electroplating technique is well-developed and the equipment and materials are very cheap. Hence, the mass production of QCM biosensors would be available.

參考文獻


42.胡智裕, “多反應區域鎳金屬蛋白質晶片之研究,” 博士論文, 中原大學機械工程系, 2008.
43.張証皓, “以田口式實驗方法設計及製作最佳化鎳沉積之蛋白質晶片,” 碩士論文, 中原大學機械工程系, 2005.
47.周念仁,“Major Urinary Protein的性質及應用之探討,”碩士論文, 大同大學生物工程系, 2003.
46.詹婉祯, “電漿和接枝聚合處理對QCM表面固定DNA的影響及病原菌檢測之研究,” 碩士論文, 大同大學材料工程系, 2004.
44.張啟霆, “以陣列式QCM 生物感測器偵測蛋白質濃度之研究,” 碩士論文,中原大學機械工程系,2007.

延伸閱讀