在化學反應中,反應物的濃度與反應物的碰撞頻率的提升,可以使化學反應的速率增加。我們想利用修飾有PEG分子的奈米氧化鐵粒子攜帶螢光抗體,在溶液中藉由從上下通入交流磁場的擾動,集中抗體的濃度與增加抗體與自組裝分子(SAM)的碰撞頻率來提升之間的接合效率。以此結果為基礎,進而,我們可以推衍至抗體與抗原間的接合效率提升。 首先,在本文中,我們先完成了奈米氧化鐵的有機相合成,達到控制尺寸大小與均勻度的目的。再藉由PEG分子的修飾,使奈米磁球能與水相中分散且帶有COOH官能基。帶有COOH官能基的奈米磁球在經過EDC與NHS活化後,可與螢光抗體做接合。再透過分光光度計的測量來做抗體濃度的定量。 我們利用此一工具來進行抗體與自組裝分子的接合效率提升測試,找尋交流磁場的最佳擾動頻率。在目前最佳參數下,達到提升抗體與自組裝分子的接合效率374%的結果。
In this research we propose the utilization of iron oxide nanoparticles for the enhancement of protein binding efficiency to SAMs functionalized surface. Very uniform iron oxide nanoparticles with 5 and 10 nm particle sizes have been successfully fabricated by using micelle method in solvent phase, and the surfaces were modified by PEG-COOH functional group for dispersion in water and conjugation with protein. Anti-rabbit IgG-cy3 was successfully conjugated on the nanoparticle surfaces after the activation of PEG-COOH group. Binding efficiency between iron oxide-protein conjugation and self-assembly molecules (SAM) by external magnetic field with different AC frequencies was tested and demonstrated a 374% enhancement.