2015
DOI: 10.1021/cm5044792
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Cu3-xP Nanocrystals as a Material Platform for Near-Infrared Plasmonics and Cation Exchange Reactions

Abstract: Synthesis approaches to colloidal Cu3P nanocrystals (NCs) have been recently developed, and their optical absorption features in the near-infrared (NIR) have been interpreted as arising from a localized surface plasmon resonance (LSPR). Our pump–probe measurements on platelet-shaped Cu3-xP NCs corroborate the plasmonic character of this absorption. In accordance with studies on crystal structure analysis of Cu3P dating back to the 1970s, our density functional calculations indicate that this material is substo… Show more

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Cited by 148 publications
(289 citation statements)
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References 58 publications
(128 reference statements)
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“…Such core–shell structures are often observed in systems with low ion diffusivity where the reaction starts from the QD surface. 3537 Indeed, the 30–60 min time required for the CE reaction to reach completion (Figure 2c) suggests slow ion diffusion, an observation supported by other reports of slow CE reactions in III–V QD materials. 37,38 …”
Section: Resultssupporting
confidence: 84%
“…Such core–shell structures are often observed in systems with low ion diffusivity where the reaction starts from the QD surface. 3537 Indeed, the 30–60 min time required for the CE reaction to reach completion (Figure 2c) suggests slow ion diffusion, an observation supported by other reports of slow CE reactions in III–V QD materials. 37,38 …”
Section: Resultssupporting
confidence: 84%
“…It has recently been used to produce GaAs, InAs, GaP, and InP with relatively narrow size dispersions, while avoiding the challenges associated with the traditional so-called hot-injection synthesis. [21][22][23] This synthetic route also has the advantage of preserving the original NC conformation, opening up the control of shape in these zinc blende NCs, including 1D rods and 2D sheets. A potential drawback is the incomplete removal of Cu that is used in an intermediate stage, and often quenches the PL.…”
Section: Synthesis Of Non-toxic Alternativesmentioning
confidence: 99%
“…First, the synthesis of high-PL InP QDs 62 with a spectral coverage that rivals CdSe, and converging performance indicates that these materials are accessible via traditional means. Cation exchange, 21,23,58,83 on the other hand, is an emerging route used to obtain III-V NCs, 21,22 Zn-based II-VI 89 and even ternary chalcogenides. 58 A prominent advantage of this approach is that it preserves the narrow size distributions as well as the shape of initial NCs, providing the possibility to obtain shape-controlled NCs that are difficult to grow via direct routes.…”
Section: Conclusion and Perspectivementioning
confidence: 99%
“…This solid-state reaction draws much attention particularly because design of complex HNCs is possible when anisotropic seed nanoparticles are available, and a relatively mild exchange process keeps the shape anisotropy intact. 6 The versatility of cation exchange has motivated the intensive study of its molecular-level mechanism for the process. 7 High surface area of NCs reduces subreaction activation barriers; therefore, the synthesis of unique metastable products becomes possible.…”
Section: ■ Introductionmentioning
confidence: 99%