Position‐ and Orientation‐Controlled Growth of Wulff‐Shaped Colloidal Crystals Engineered with DNA,Advanced Materials

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Position‐ and Orientation‐Controlled Growth of Wulff‐Shaped Colloidal Crystals Engineered with DNA
Advanced Materials ( IF 27.4 ) Pub Date : 2020-10-21 , DOI: 10.1002/adma.202005316
Lin Sun _{1,

2} , Haixin Lin _{1,

3} , Yuanwei Li _{1,

4} , Wenjie Zhou _{1,

3} , Jingshan S Du _{1,

2} , Chad A Mirkin _{1,

2,

3,

4}

Affiliation

Colloidal crystals have emerged as promising candidates for building optical microdevices. Techniques now exist for synthesizing them with control over their nanoscale features (e.g., particle compositions, sizes, shapes, and lattice parameters and symmetry); however, the ability to tune macroscale structural features, such as the relative positions of crystals to one another and lattice orientations, has yet to be realized. Here, inspiration is drawn from epitaxial growth strategies in atomic crystallization, and patterned substrates are prepared that, when used in conjunction with DNA‐mediated nanoparticle crystallization, allow for control over individual Wulff‐shaped crystal growth, location, and orientation. In addition, the approach allows exquisite control over the patterned substrate/crystal lattice mismatch, something not yet realized for any epitaxy process. This level of structural control is a significant step toward realizing complex, integrated devices with colloidal crystal components, and this approach provides a model system for further exploration in epitaxy systems.

中文翻译：

用 DNA 改造的 Wulff 形胶体晶体的位置和取向控制生长

胶体晶体已成为构建光学微器件的有希望的候选者。现在存在通过控制它们的纳米级特征（例如，粒子组成、大小、形状和晶格参数和对称性）来合成它们的技术；然而，调整宏观结构特征的能力，例如晶体彼此的相对位置和晶格取向，尚未实现。在这里，灵感来自原子结晶中的外延生长策略，并制备了图案化基板，当与 DNA 介导的纳米颗粒结晶结合使用时，可以控制单个 Wulff 形晶体的生长、位置和方向。此外，该方法允许对图案化衬底/晶格失配进行精确控制，任何外延工艺尚未实现的东西。这种结构控制水平是实现具有胶体晶体成分的复杂集成器件的重要一步，这种方法为外延系统的进一步探索提供了一个模型系统。

更新日期：2020-11-25

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