Virus-Sized Gold Nanorods: Plasmonic Particles for Biology

Accounts of Chemical Research
Catherine J MurphyYishu Zhang

Abstract

Plasmons, collective oscillations of conduction-band electrons in nanoscale metals, are well-known phenomena in colloidal gold and silver nanocrystals that produce brilliant visible colors in these materials that depend on the nanocrystal size and shape. Under illumination at or near the plasmon bands, gold and silver nanocrystals exhibit properties that enable fascinating biological applications: (i) the nanocrystals elastically scatter light, providing a straightforward way to image them in complex aqueous environments; (ii) the nanocrystals produce local electric fields that enable various surface-enhanced spectroscopies for sensing, molecular diagnostics, and boosting of bound fluorophore performance; (iii) the nanocrystals produce heat, which can lead to chemical transformations at or near the nanocrystal surface and can photothermally destroy nearby cells. While all the above-mentioned applications have already been well-demonstrated in the literature, this Account focuses on several other aspects of these nanomaterials, in particular gold nanorods that are approximately the size of viruses (diameters of ∼10 nm, lengths up to 100 nm). Absolute extinction, scattering, and absorption properties are compared for gold nanorod...Continue Reading

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Jul 8, 2020·Polymers·Gérard AudranPavel Postnikov
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Sep 15, 2021·ACS Applied Materials & Interfaces·Matthew N CreyerJesse V Jokerst
Nov 5, 2021··Iole VendittiLuca Tortora

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