Journal
NANO LETTERS
Volume 21, Issue 6, Pages 2610-2617Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.1c00006
Keywords
localized surface plasmon resonance; colloidal synthesis; antimony-doped copper sulfide; doping; tunability
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Funding
- National Natural Science Foundation of China [21475021, 21427807, 21777096]
- Priority Academic Program Development of Jiangsu Higher Education Institutions
- Case Western Reserve University
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This research presents a colloidal synthesis strategy for highly dispersed, platelet-shaped, antimony-doped copper sulfide semiconductor nanocrystals with a tunable dominant localized surface plasmon resonance band. The study quantifies the resulting plasmonic features and elucidates the carrier concentration requirements for a continuum of LSPR spectra. Building on previous work on binary plasmonics, this method introduces a much wider and finer tunability with ternary semiconductor plasmonics.
Semiconductor plasmonics is a recently emerging field that expands the chemical and physical bandwidth of the hitherto well-established noble metallic nanoparticles. Achieving tunable plasmonics from colloidal semiconductor nanocrystals has drawn enormous interest and is promising for plasmon-related applications. However, realizing this goal of tunable semiconductor nanocrystals is currently still a synthetic challenge. Here, we report a colloidal synthesis strategy for highly dispersed, platelet-shaped, antimony-doped copper sulfide semiconductor nanocrystals (Sb-y-CuxS NCs) with a dominant localized surface plasmon resonance (LSPR) band tunable from the near-infrared into the midvisible spectral range. This work presents the synthesis and quantifies the resulting plasmonic features. It furthermore elucidates the underlying carrier concentration requirements to realize a continuum of LSPR spectra. Building on our previous work on binary plasmonics CuxS, CuxSe, and CuxTe NCs, the present method introduces a much wider and finer tunability with ternary semiconductor plasmonics.
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