Costa Mariana C F, Marangoni Valeria S, Trushin Maxim, Carvalho Alexandra, Lim Sharon X, Nguyen Hang T L, Ng Pei Rou, Zhao Xiaoxu, Donato Ricardo K, Pennycook Stephen J, Sow Chorng H, Novoselov Konstantin S, Castro Neto Antonio H
Centre for Advanced 2D Materials, National University of Singapore, Singapore, 117546, Singapore.
Department of Materials Science and Engineering, National University of Singapore, Singapore, 117575, Singapore.
Adv Mater. 2021 Jun;33(25):e2100442. doi: 10.1002/adma.202100442. Epub 2021 May 12.
A class of compounds sharing the properties of 2D materials and electrolytes, namely 2D electrolytes is described theoretically and demonstrated experimentally. 2D electrolytes dissociate in different solvents, such as water, and become electrically charged. The chemical and physical properties of these compounds can be controlled by external factors, such as pH, temperature, electric permittivity of the medium, and ionic concentration. 2D electrolytes, in analogy with polyelectrolytes, present reversible morphological transitions from 2D to 1D, as a function of pH, due to the interplay of the elastic and Coulomb energies. Since these materials show stimuli-responsive behavior to the environmental conditions, 2D electrolytes can be considered as a novel class of smart materials that expand the functionalities of 2D materials and are promising for applications that require stimuli-responsive demeanor, such as drug delivery, artificial muscles, and energy storage.
理论上描述并通过实验证明了一类兼具二维材料和电解质特性的化合物，即二维电解质。二维电解质在不同溶剂（如水）中解离并带电。这些化合物的化学和物理性质可由外部因素控制，如pH值、温度、介质的介电常数和离子浓度。与聚电解质类似，由于弹性和库仑能的相互作用，二维电解质会根据pH值呈现从二维到一维的可逆形态转变。由于这些材料对环境条件表现出刺激响应行为，二维电解质可被视为一类新型智能材料，它扩展了二维材料的功能，在需要刺激响应行为的应用中具有广阔前景，如药物递送、人造肌肉和能量存储。
