Manual shaking exfoliation of large‐size two‐dimensional LiInP2S6 nanosheets with exponential change in ionic conductivity for water detection

SmartMat Pub Date : 2024-01-16 DOI:10.1002/smm2.1266
Jianing Liang, Zongdong Sun, Chaoqi Zhu, Shuhao Wang, Cheng Zeng, Dawen Zeng, Tianyou Zhai, Huiqiao Li
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Abstract

Large‐sized and atomically thin two‐dimensional metal thiophosphate materials have been widely exploited in detectors due to their rich physical/chemical properties of high surface area and massive adjustable sites. However, existing production methods are limited in terms of meeting the demanding challenges in achieving the scalable fabrication of high‐quality nanomaterials under mild conditions. Here, we develop a facile intercalation–exfoliation method that can fabricate large lateral size (>23 μm) and few‐layer LiInP2S6 nanosheets with high crystalline quality fast. Due to the advantage of hydrophilicity of lithium, swelled interlayer spacing can be obtained, which enables the rapid exfoliation by only slight manual shaking within tens of seconds. Concomitantly, the inorganic LiInP2S6 film manufactured by nanosheets has inter‐connected ionic channels, which can be adjusted on the basis of the water content, enabling tunable ionic conductivity. As a result, ionic conductor films using ions as charge carriers can achieve high water response with good repeatability and excellent long‐term stability in a wide moisture range. Moreover, the as‐prepared detector has excellent capability in real‐time noncontact human–machine interfacing. This study, not only is a powerful strategy for the fabrication of large‐sized and high‐quality nanosheets presented but also proof for the promising development of iontronic devices in new applications.
人工振荡剥离大尺寸二维 LiInP2S6 纳米片,离子电导率呈指数变化,用于水检测
大尺寸、原子级薄的二维金属硫代磷酸盐材料具有高表面积和大量可调节位点等丰富的物理/化学特性,已被广泛应用于探测器中。然而,现有的生产方法在温和条件下实现高质量纳米材料的规模化制造方面受到限制,难以应对严峻的挑战。在此,我们开发了一种简便的插层-剥离方法,可快速制备出横向尺寸大(>23 μm)、结晶质量高的少层 LiInP2S6 纳米片。由于锂的亲水性优势,可获得膨胀的层间间距,只需轻微的手动振荡即可在数十秒内快速剥离。同时,用纳米片制造的无机 LiInP2S6 薄膜具有相互连接的离子通道,可根据含水量进行调节,从而实现离子导电性的可调。因此,以离子作为电荷载体的离子导体薄膜可以在很宽的湿度范围内实现高水响应、良好的重复性和出色的长期稳定性。此外,所制备的检测器还具有出色的实时非接触式人机接口能力。这项研究不仅为制备大尺寸、高质量的纳米片提供了有力的策略,而且证明了离子电子器件在新应用领域的发展前景。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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