http://www.cnr.it/ontology/cnr/individuo/prodotto/ID255868
Metallic-like Stoichiometric Copper Sulfide Nanocrystals: Phase- and Shape-Selective Synthesis, Near-Infrared Surface Plasmon Resonance Properties, and Their Modeling (Articolo in rivista)
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- Metallic-like Stoichiometric Copper Sulfide Nanocrystals: Phase- and Shape-Selective Synthesis, Near-Infrared Surface Plasmon Resonance Properties, and Their Modeling (Articolo in rivista) (literal)
- Anno
- 2013-01-01T00:00:00+01:00 (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
- 10.1021/nn403035s (literal)
- Alternative label
Yi Xie +, Luigi Carbone §*, Concetta Nobile §, Vincenzo Grillo , Stefania D'Agostino +#, Fabio Della Sala +§, Cinzia Giannini , Davide Altamura , Christian Oelsner , Carola Kryschi , and P. Davide Cozzoli §¶* (2013)
Metallic-like Stoichiometric Copper Sulfide Nanocrystals: Phase- and Shape-Selective Synthesis, Near-Infrared Surface Plasmon Resonance Properties, and Their Modeling
in ACS nano; American Chemical Society, Washington, DC (Stati Uniti d'America)
(literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
- Yi Xie +, Luigi Carbone §*, Concetta Nobile §, Vincenzo Grillo , Stefania D'Agostino +#, Fabio Della Sala +§, Cinzia Giannini , Davide Altamura , Christian Oelsner , Carola Kryschi , and P. Davide Cozzoli §¶* (literal)
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- http://dx.doi.org/10.1021/nn403035s (literal)
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- + Center for Biomolecular Nanotechnologies@UNILE, Istituto Italiano di Tecnologia, Via Barsanti, I-73010 Arnesano (LE), Italy
§ National Nanotechnology Laboratory (NNL), CNR Istituto Nanoscienze, c/o Distretto Tecnologico, Via per Arnesano km 5, I-73100 Lecce, Italy
Centro S3, CNR Istituto Nanoscienze, Via Campi 213/A, I-41125 Modena, Italy
IMEM-CNR, Parco Area delle Scienze 37/A, I-43124 Parma, Italy
# Dipartimento di Fisica, Università di Pavia, Via Bassi 6, I-27100 Pavia, Italy
Istituto di Cristallografia (IC), CNR, Via Amendola 122/O, I-70126 Bari, Italy
Department of Chemistry and Pharmacy and ICMM, Friedrich-Alexander University of Erlangen-Nuremberg, Egerlandstrasse 3, D-91058 Erlangen, Germany
¶ Dipartimento di Matematica e Fisica \"E. De Giorgi\", Università del Salento, Via per Arnesano, I-73100 Lecce, Italy (literal)
- Titolo
- Metallic-like Stoichiometric Copper Sulfide Nanocrystals: Phase- and Shape-Selective Synthesis, Near-Infrared Surface Plasmon Resonance Properties, and Their Modeling (literal)
- Abstract
- In the realm of semiconductor nanomaterials, a crystal lattice heavily doped with cation/anion vacancies or ionized atomic impurities is considered to be a general prerequisite to accommodating excess free carriers that can support localized surface plasmon resonance (LSPR). Here, we demonstrate a surfactant-assisted nonaqueous route to anisotropic copper sulfide nanocrystals, selectively trapped in the covellite phase, which can exhibit intense, size-tunable LSPR at near-infrared wavelengths despite their stoichiometric, undoped structure. Experimental extinction spectra are satisfactorily reproduced by theoretical calculations performed by the discrete dipole approximation method within the framework of the Drude-Sommerfeld model. The LSPR response of the nanocrystals and its geometry dependence are interpreted as arising from the inherent metallic-like character of covellite, allowed by a significant density of lattice-constitutional valence-band free holes. As a consequence of the unique electronic properties of the nanocrystals and of their monodispersity, coherent excitation of symmetric radial breathing modes is observed for the first time in transient absorption experiments at LSPR wavelengths. (literal)
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