Chemoaffinity-Mediated Synthesis of NaRES2-Based Nanocrystals as Versatile Nano-Building Blocks and Durable Nano-Pigments
- 16 January 2012
- journal article
- research article
- Published by American Chemical Society (ACS) in Journal of the American Chemical Society
- Vol. 134 (6), 3255-3264
- https://doi.org/10.1021/ja211103b
Abstract
In this article, we present a chemoaffinity-mediated synthetic strategy toward trivalent rare earth (RE) sulfides-based nanocrystals with poor affinity between cation and anion (i.e., RE3+ and S2–). With the affinity mediation among multiple constituents based on hard and soft acid and base theory, we synthesized a series of monodisperse NaRES2 nanocrystals (RE = La to Lu, Y). The revelation of the nanocrystal growth mechanism from both experimental evidence and crystal structure modeling has enabled a robust control over the sizes and morphologies of the nanocrystals. This principle of chemoaffinity has also promised the synthesis of well-defined but even more complex RE-based hetero-nanostructures (i.e. NaLaS2-Au, [email protected]2, NaLaS2@Ag2S, [email protected]2@Ag2S) with tunable optical properties. Furthermore, this synthetic method has yielded durable NaCeS2-based red nano-pigments under ambient conditions, with superior brightness and permeability in polydimethylsiloxane.Keywords
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