Sequence‐Dependent DNA Functionalization of Upconversion Nanoparticles and Their Programmable Assemblies. (18th March 2020)

• Record Type: Journal Article
• Authors: Ge, Huan; Wang, Dongya; Pan, Yue; Guo, Yuanyuan; Li, Hongyu; Zhang, Fan; Zhu, Xinyuan; Li, Yuehua; Zhang, Chuan; Huang, Ling
• Is Part Of: Angewandte Chemie. Volume 132:Number 21(2020)
• Page Start: 8210
• Page End: 8214
• Publication Date: 2020-03-18
• Subjects: DNA -- Nanostrukturen -- Polycytosin -- Upconversion-Nanopartikel -- Selbstassemblierung; Chemistry -- Periodicals; 540
• DOI: 10.1002/ange.202000831
• Languages: English
• ISSNs: 0044-8249

Abstract

Abstract: DNA‐modified lanthanide‐doped upconversion nanoparticles (DNA‐UCNPs) that combine the functions of DNA and the optical features of UCNPs have shown great promise in a wide range of fields. However, challenges remain in precisely tethering and orienting the DNA strands on the UCNP surface. Herein, we systematically investigate the sequence dependence of DNAs in their interactions with UCNPs, and reveal that poly‐cytosine (poly‐C) has high affinity for the UCNP surface. A general approach to synthesize monodispersed DNA‐UCNP conjugates is developed using poly‐C‐containing diblock DNA strands. The poly‐C segment of the DNA strand binds to the surfaces of UCNPs and the second segment is oriented perpendicularly on the UCNP surface, making the DNA‐UCNPs highly stable and monodispersed in aqueous solution. The dense layer of DNA on the UCNP surface enables the programmable assembly of UCNPs with other DNA‐functionalized nanoparticles or DNA origamis through hybridization, resulting in the formation of well‐organized complex structures. Abstract : Sequenzabhängige Wechselwirkungen zwischen DNA und Upconversion‐Nanopartikeln (UCNPs) wurden systematisch untersucht. Polycytosin (poly‐C) hat eine hohe Affinität für die UCNP‐Oberfläche. Auf Grundlage dieser Erkenntnis wird eine allgemeine Strategie zur Synthese monodisperser DNA‐UCNP‐Konjugate mit poly‐C enthaltenden Diblock‐DNA‐Strängen entwickelt. Die Konjugate können für DNA‐geleitete UCNP‐Assemblierung genutzt werden.