Department of Mechanical and Aerospace Engineering, University at Buffalo, The State University of New York, Buffalo, NY, 14260, USA.
Department of Industrial and Systems Engineering, University at Buffalo, The State University of New York, Buffalo, NY, 14260, USA.
Nat Commun. 2022 Nov 17;13(1):7056. doi: 10.1038/s41467-022-34874-6.
High proton conductivity originated from its small size and the diffusion-free Grotthuss mechanism offers immense promise for proton-based magneto-ionic control of magnetic materials. Despite such promise, the realization of proton magneto-ionics is hampered by the lack of proton-responsive magnets as well as the solid-state sensing method. Here, we report the proton-based magneto-ionics in molecule-based magnet which serves as both solid-state proton battery electrode and radiofrequency sensing medium. The three-dimensional hydrogen-bonding network in such a molecule-based magnet yields a high proton conductivity of 1.6 × 10 S cm. The three-dimensional printed vascular hydrogel provides the on-demand proton stimulus to enable magneto-ionics, where the Raman spectroscopy shows the redox behavior responsible for the magnetism control. The radiofrequency proton sensor shows high sensitivity in a wide proton concentration range from 10 to 1 molar under a low working radiofrequency and magnetic field of 1 GHz and 405 Oe, respectively. The findings shown here demonstrate the promising sensing application of proton-based magneto-ionics.
高质子电导率源于其尺寸小和无扩散的质子扩散机制，为质子基磁离子控制磁性材料提供了巨大的前景。尽管有这样的前景，但质子磁离子学的实现受到缺乏质子响应磁体以及固态传感方法的阻碍。在这里，我们报告了分子基磁体中的质子磁离子学，该磁体既可用作固态质子电池电极，也可用作射频传感介质。这种分子基磁体中的三维氢键网络产生了 1.6×10^-3 S cm 的高质子电导率。三维打印的血管水凝胶提供了按需质子刺激，从而实现了磁离子学，拉曼光谱显示了与磁控制相关的氧化还原行为。射频质子传感器在低工作射频和磁场（分别为 1GHz 和 405Oe）下，在 10 至 1 摩尔的宽质子浓度范围内显示出高灵敏度。这里展示的研究结果表明，质子磁离子学具有有前途的传感应用。
