Disordered and Conductive Chiral Spin‐Selective Strategy to Enhance Small‐Molecule‐Based Spintronic Application

作者：Wei‐Guang Zhang, Wei‐Guang Zhang, Tong Yang, Shuo Jiang, Fang Ding, Yong Liu, Mengxu Wang, Wenqi Li, Jing Feng, Mengjie Deng, Sufang Yang, Yaxin Zhai, Jianbo Wang, Bo Chen, Ming Ma, Wei Zhang, Wei Zhang · 发表于：Small · 年份：2025 · DOI：10.1002/smll.202412215 · 被引用次数：6 · 研究领域：Molecular Junctions and Nanostructures、Quantum and electron transport phenomena、Advanced Memory and Neural Computing

Abstract Chiral materials, which can manipulate the electron spin by the chiral‐induced spin selectivity (CISS) effect without involving the complicated magnetic components, exhibits great potentials in low‐cost spin optoelectronics. However, ideal CISS usually requires a relatively ordered and conductive (or insulated but ultrathin) chiral layer, which contradicts the disordered‐packing and high‐impedance characteristics of chiral molecules, preventing the direct application of most chiral molecules for CISS and increasing the difficulty to prepare chiral spin‐selective layers. Here, a general disordered and conductive chiral molecular strategy is proposed to simply construct the small‐molecule‐based spin polarizer. Directly spin‐coating chiral molecules onto the electrode forms the disordered chiral thin film, which exhibits obvious CISS effects demonstrated by an electrochemical oxygen evolution reaction (OER) and a magnetic conductive probe‐atomic force microscopy (mcp‐AFM). More importantly, by disorderly doping conductive graphite nanoparticles into this film, the high impedance of the chiral molecular layers can be effectively reduced, which results in a higher OER activity with lower H 2 O 2 byproduct and a stronger spin‐polarization degree. This can be attributed to a conductivity‐enhanced disordered CISS effect, which may lay the foundation for designing universal and high‐performance spintronic devices.