Nanocrystal Core Size and Shape Substitutional Doping and Underlying Crystalline Order in Nanocrystal Superlattices,ACS Nano

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Nanocrystal Core Size and Shape Substitutional Doping and Underlying Crystalline Order in Nanocrystal Superlattices
ACS Nano ( IF 15.8 ) Pub Date : 2019-05-03 00:00:00 , DOI: 10.1021/acsnano.9b01107
Davit Jishkariani ₁ , Katherine C. Elbert ₁ , Yaoting Wu ₁ , Jennifer D. Lee ₁ , Michiel Hermes ₂ , Da Wang ₂ , Alfons van Blaaderen ₂ , Christopher B. Murray _{1,

3}

Affiliation

Substitutional doping is a potentially powerful technique to control the properties of nanocrystal (NC) superlattices (SLs). However, not every NC can be substituted into any lattice, as the NCs have to be close in size and shape, limiting the application of substitutional doping. Here we show that this limitation can be overcome by employing ligands of various size. We show that small NCs with long ligands can be substituted into SLs of big NCs with short ligands. Furthermore, we show that shape differences can also be overcome and that cubes can substitute spheres when both are coated with long ligands. Finally, we use the NC effective ligand size, softness, and effective overall size ratio to explain observed doping behaviors.

中文翻译：

纳米晶超晶格中的纳米晶核尺寸和形状替代掺杂及底层晶序

取代掺杂是控制纳米晶体（NC）超晶格（SLs）性能的潜在强大技术。但是，并非每个NC都可以被替换为任何晶格，因为NC必须在尺寸和形状上接近，从而限制了替代掺杂的应用。在这里，我们表明可以通过使用各种大小的配体来克服这一局限性。我们表明，具有长配体的小型NC可以替换为具有短配体的大型NC的SL。此外，我们表明，形状差异也可以克服，并且当两个立方体都被长的配体包覆时，立方体可以替代球形。最后，我们使用NC有效的配体尺寸，柔软度和有效的总尺寸比例来解释观察到的掺杂行为。

更新日期：2019-05-03

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