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      On the use of Au@Ag core-shell nanorods for SERS detection of Thiram diluted solutions

      , , ,
      Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy
      Elsevier BV

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          Optical Constants of the Noble Metals

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            Surface Enhanced Raman Scattering Enhancement Factors: A Comprehensive Study

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              Gold nanorods: from synthesis and properties to biological and biomedical applications.

              Noble metal nanoparticles are capable of confining resonant photons in such a manner as to induce coherent surface plasmon oscillation of their conduction band electrons, a phenomenon leading to two important properties. Firstly, the confinement of the photon to the nanoparticle's dimensions leads to a large increase in its electromagnetic field and consequently great enhancement of all the nanoparticle's radiative properties, such as absorption and scattering. Moreover, by confining the photon's wavelength to the nanoparticle's small dimensions, there exists enhanced imaging resolving powers, which extend well below the diffraction limit, a property of considerable importance in potential device applications. Secondly, the strongly absorbed light by the nanoparticles is followed by a rapid dephasing of the coherent electron motion in tandem with an equally rapid energy transfer to the lattice, a process integral to the technologically relevant photothermal properties of plasmonic nanoparticles. Of all the possible nanoparticle shapes, gold nanorods are especially intriguing as they offer strong plasmonic fields while exhibiting excellent tunability and biocompatibility. We begin this review of gold nanorods by summarizing their radiative and nonradiative properties. Their various synthetic methods are then outlined with an emphasis on the seed-mediated chemical growth. In particular, we describe nanorod spontaneous self-assembly, chemically driven assembly, and polymer-based alignment. The final section details current studies aimed at applications in the biological and biomedical fields. Copyright © 2009 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
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                Journal
                Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy
                Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy
                Elsevier BV
                13861425
                April 2020
                April 2020
                : 231
                : 118113
                Article
                10.1016/j.saa.2020.118113
                32035332
                2495feed-d94a-4836-b062-c7f1325a5c6f
                © 2020

                https://www.elsevier.com/tdm/userlicense/1.0/

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