Proton-Gradient-Driven Oriented Motion of Nanodiamonds Grafted to Graphene by Dynamic Covalent Bonds,ACS Nano

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Proton-Gradient-Driven Oriented Motion of Nanodiamonds Grafted to Graphene by Dynamic Covalent Bonds
ACS Nano ( IF 15.8 ) Pub Date : 2018-06-11 00:00:00 , DOI: 10.1021/acsnano.8b03015
Petr Kovaříček ₁ , Marek Cebecauer ₁ , Jitka Neburková _{2,

3} , Jan Bartoň _{2,

4} , Michaela Fridrichová ₁ , Karolina A. Drogowska ₁ , Petr Cigler ₂ , Jean-Marie Lehn ₅ , Martin Kalbac ₁

Affiliation

Manipulating nanoscopic objects by external stimuli is the cornerstone of nanoscience. Here, we report the implementation of dynamic covalent chemistry in the reversible binding and directional motion of fluorescent nanodiamond particles at a functionalized graphene surface via imine linkages. The dynamic connections allow for controlling the formation and rupture of these linkages by external stimuli. By introduction of pH gradients, the nanoparticles are driven to move along the gradient due to the different rates of the imine condensation and hydrolysis in the two environments. The multivalent nature of the particle-to-surface connection ensures that particles remain attached to the surface, whereas its dynamic character allows for exchange reaction, thus leading to displacement yet bound behavior in two-dimensional space. These results open a pathway for thermodynamically controlled manipulation of objects on the nanoscale.

中文翻译：

通过动态共价键接枝到石墨烯上的纳米金刚石的质子梯度驱动取向运动

通过外部刺激来操纵纳米物体是纳米科学的基石。在这里，我们报告通过功能化的石墨烯表面上的荧光纳米金刚石颗粒的可逆结合和方向运动中的动态共价化学的实现，方法是通过亚胺键。动态连接允许通过外部刺激来控制这些连接的形成和破裂。通过引入pH梯度，由于两种环境中亚胺缩合和水解的速率不同，纳米颗粒被驱动沿梯度移动。颗粒与表面的连接具有多价性质，可确保颗粒保持附着在表面上，而其动态特性允许交换反应，从而导致在二维空间中发生位移而束缚行为。这些结果为纳米级物体的热力学控制操作开辟了一条途径。

更新日期：2018-06-11

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