DNA-driven dynamic assembly of MoS2 nanosheets,Faraday Discussions

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DNA-driven dynamic assembly of MoS2 nanosheets
Faraday Discussions ( IF 3.3 ) Pub Date : 2020-3-27 , DOI: 10.1039/c9fd00118b
Giuseppe Amoroso ₁ , Andrei Sapelkin , Qingyu Ye , Vicente Araullo-Peters , Alessandro Cecconello , Gustavo Fernandez , Matteo Palma

Affiliation

Controlling the assembly of molybdenum disulfide (MoS₂) layers into static and dynamic superstructures can impact on their use in optoelectronics, energy, and drug delivery. Toward this goal, we present a strategy to drive the assembly of MoS₂ layers via the hybridization of complementary DNA linkers. By functionalizing the MoS₂ surface with thiolated DNA, MoS₂ nanosheets were assembled into mulitlayered superstructures, and the complementary DNA strands were used as linkers. A disassembly process was triggered by the formation of an intramolecular i-motif structure at a cystosine-rich sequence in the DNA linker at acidic pH values. We tested the versatility of our approach by driving the disassembly of the MoS₂ superstructures through a different DNA-based mechanism, namely strand displacement. This study demonstrates how DNA can be employed to drive the static and dynamic assembly of MoS₂ nanosheets in aqueous solution.

中文翻译：

DNA驱动的MoS2纳米片动态组装

控制二硫化钼 (MoS ₂ ) 层组装成静态和动态超结构会影响它们在光电子学、能源和药物输送中的应用。为了实现这一目标，我们提出了一种通过互补 DNA 接头的杂交来驱动 MoS ₂层组装的策略。通过用硫醇化 DNA功能化 MoS _{2表面，MoS}₂将纳米片组装成多层超结构，互补的 DNA 链用作接头。在酸性 pH 值下，在 DNA 接头中富含胱氨酸的序列处形成分子内 i 基序结构，触发了拆卸过程。我们通过不同的基于 DNA 的机制（即链置换）来驱动 MoS ₂上层结构的拆卸，从而测试了我们方法的多功能性。本研究展示了如何使用 DNA 来驱动 MoS ₂纳米片在水溶液中的静态和动态组装。

更新日期：2020-03-27

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