Metallic-like stoichiometric copper sulfide nanocrystals: Phase- and shape-selective synthesis, near-infrared surface plasmon resonance properties, and their modeling
Xie Y, Carbone L, Nobile C, Grillo V, D'Agostino S, Della Sala F, Giannini C, Altamura D, Oelsner C, Kryschi C, Cozzoli PD (2013)
Publication Type: Journal article, Original article
Publication year: 2013
Journal
Original Authors: Xie Y., Carbone L., Nobile C., Grillo V., D'Agostino S., Della Sala F., Giannini C., Altamura D., Oelsner C., Kryschi C., Cozzoli P.D.
Publisher: American Chemical Society
Book Volume: 7
Pages Range: 7352-7369
Journal Issue: 8
DOI: 10.1021/nn403035s
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. © 2013 American Chemical Society.
Authors with CRIS profile
Christian Oelsner
Lehrstuhl für Physikalische Chemie I
Carola Kryschi
Professur für Physikalische Chemie
Involved external institutions
Italian Institute of Technology / Istituto Italiano di Tecnologia (IIT)
Italy (IT)
Consiglio Nazionale delle Ricerche (CNR) / National Research Council of Italy
Italy (IT)
Italy (IT)
Consiglio Nazionale delle Ricerche (CNR) / National Research Council of Italy
Italy (IT)
How to cite
APA:
Xie, Y., Carbone, L., Nobile, C., Grillo, V., D'Agostino, S., Della Sala, F.,... Cozzoli, P.D. (2013). Metallic-like stoichiometric copper sulfide nanocrystals: Phase- and shape-selective synthesis, near-infrared surface plasmon resonance properties, and their modeling. Acs Nano, 7(8), 7352-7369. https://dx.doi.org/10.1021/nn403035s
MLA:
Xie, Yi, et al. "Metallic-like stoichiometric copper sulfide nanocrystals: Phase- and shape-selective synthesis, near-infrared surface plasmon resonance properties, and their modeling." Acs Nano 7.8 (2013): 7352-7369.
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