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Dynamic and Quantitative Control of the DNA‐Mediated Growth of Gold Plasmonic Nanostructures
Author(s) -
Shen Jianlei,
Xu Lifeng,
Wang Chunpeng,
Pei Hao,
Tai Renzhong,
Song Shiping,
Huang Qing,
Fan Chunhai,
Chen Gang
Publication year - 2014
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201402937
Subject(s) - plasmon , nanostructure , small angle x ray scattering , materials science , synchrotron , nanotechnology , scattering , dynamic light scattering , transmission electron microscopy , chemical physics , colloidal gold , spectroscopy , optoelectronics , chemistry , optics , nanoparticle , physics , quantum mechanics
Reproducible and controllable growth of nanostructures with well‐defined physical and chemical properties is a longstanding problem in nanoscience. A key step to address this issue is to understand their underlying growth mechanism, which is often entangled in the complexity of growth environments and obscured by rapid reaction speeds. Herein, we demonstrate that the evolution of size, surface morphology, and the optical properties of gold plasmonic nanostructures could be quantitatively intercepted by dynamic and stoichiometric control of the DNA‐mediated growth. By combining synchrotron‐based small‐angle X‐ray scattering (SAXS) with transmission electron microscopy (TEM), we reliably obtained quantitative structural parameters for these fine nanostructures that correlate well with their optical properties as identified by UV/Vis absorption and dark‐field scattering spectroscopy. Through this comprehensive study, we report a growth mechanism for gold plasmonic nanostructures, and the first semiquantitative revelation of the remarkable interplay between their morphology and unique plasmonic properties.