Details

Autor(en) / Beteiligte

• Song, Tingjie
• Tang, Longhua
• Tan, Li Huey
• Wang, Xiaojing
• Satyavolu, Nitya Sai Reddy
• Xing, Hang
• Wang, Zidong
• Li, Jinghong
• Liang, Haojun
• Lu, Yi

Titel

DNA-Encoded Tuning of Geometric and Plasmonic Properties of Nanoparticles Growing from Gold Nanorod Seeds

Ist Teil von

• Angewandte Chemie (International ed.), 2015-07, Vol.54 (28), p.8114-8118

Auflage

International ed. in English

Ort / Verlag

Weinheim: WILEY-VCH Verlag

Erscheinungsjahr

2015

Link zum Volltext

Quelle

MEDLINE

Beschreibungen/Notizen

• Systematically controlling the morphology of nanoparticles, especially those growing from gold nanorod (AuNR) seeds, are underexplored; however, the AuNR and its related morphologies have shown promises in many applications. Herein we report the use of programmable DNA sequences to control AuNR overgrowth, resulting in gold nanoparticles varying from nanodumbbell to nanooctahedron, as well as shapes in between, with high yield and reproducibility. Kinetic studies revealed two representative pathways for the shape control evolving into distinct nanostructures. Furthermore, the geometric and plasmonic properties of the gold nanoparticles could be precisely controlled by adjusting the base compositions of DNA sequences or by introducing phosphorothioate modifications in the DNA. As a result, the surface plasmon resonance (SPR) peaks of the nanoparticles can be fine‐tuned in a wide range, from visible to second near‐infrared (NIR‐II) region beyond 1000 nm. Controlling nanoparticle morphology was achieved by tuning the overgrowth of gold nanorods using DNA as a capping ligand. Kinetic studies show two representative pathways for the shape control. Furthermore, the geometric and plasmonic properties of the gold nanoparticles could be precisely controlled by adjusting the base composition of the DNA sequences or by introducing phosphorothioate modifications in the DNA.