摘要
以DNA纳米材料为模板实现多种分子丰富、可控的定位组装,并探究纳米尺度分子间多种相互作用。其中,量子点作为一种纳米级别的半导体材料,以其优异的物理性质引起了人们的广泛关注。特别是棒状量子点(Quantum Nanorod,QR)具有显著的激子偶极矩,DNA指导的量子点定位组装可以研究激子间复杂相互作用等新颖物理行为。但由于棒状量子点表面配体的疏水性,其与DNA纳米结构的协同组装较为困难。本文探究了一种棒状量子点表面修饰的方法,利用修饰DNA的聚合物链和QR表面疏水配体之间的疏水相互作用实现DNA对棒状量子点的表面修饰,得到了DNA修饰的棒状量子点,为后续棒状量子点与DNA纳米结构的组装打下了坚实的基础。
DNA templated assembly can achieve various and controlled assembly of a variety of molecules and to probe the interactions between molecules at the nanoscale.Quantum dots,as a nanoscale semiconductor material,have attracted much attention for their excellent physical properties.Particularly,the quantum nanorods(QRs)bear significant exciton dipole moment and DNA assembled QRs permits the thorough investigation of complex excitonic interactions.However,due to hydrophobic ligands on QRs surface,the site-specific assembly with DNA nanostructures in aqueous solution is a challenge task.Here,we report a surface modification method to attach DNA on QRs,employing the hydrophobic interaction between poly(isobutylene-alt-maleic anhydride)(PIMA)and the hydrophobic ligands on QR surface.The as-obtained DNA modified QRs will allow to build complex structures on DNA nanostructures.
作者
李雪乔
张涛
LI Xueqiao;ZHANG Tao(School of Chemistry and Chemical Engineering,Yantai University,Yantai 264006,China)
出处
《山东化工》
CAS
2024年第19期47-49,52,共4页
Shandong Chemical Industry
关键词
棒状量子点
DNA纳米技术
表面修饰
quantum nanorods
DNA nanotechnology
surface functionalization
