Organic semiconductors and organic-inorganic hybrids are promising materials for spintronic-based memory devices. Recently, an alternative route to organic spintronic based on chiral-induced spin selectivity (CISS) is suggested. In the CISS effect, the chirality of the molecular system itself acts as a spin filter, thus avoiding the use of magnets for spin injection. Here, spin filtering in excess of 85% in helical π-conjugated materials based on supramolecular nanofibers at room temperature is reported. The high spin-filtering efficiency can even be observed in nanofibers assembled from mixtures of chiral and achiral molecules through chiral amplification effect. Furthermore and most excitingly, it is shown that both "up" and "down" orientations of filtered spins can be obtained in a single enantiopure system via the temperature-dependent helicity (P and M) inversion of supramolecular nanofibers. The findings showcase that materials based on helical noncovalently assembled systems are modular platforms with an emerging structure-property relationship for spintronic applications.

中文翻译：

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纳米纤维基材料的超分子手性对电子自旋的高效可调谐过滤。

有机半导体和有机-无机杂化材料是用于基于自旋电子学的存储设备的有前途的材料。最近，提出了一种基于手性诱导的自旋选择性（CISS）的有机自旋电子学的替代途径。在CISS效应中，分子系统本身的手性起自旋过滤器的作用，从而避免使用磁体进行自旋注入。在此，据报道在室温下基于超分子纳米纤维的螺旋π-共轭材料中自旋过滤超过85％。甚至可以通过手性放大作用在由手性和非手性分子混合物组装而成的纳米纤维中观察到高自旋过滤效率。此外，最令人兴奋的是，它显示了“向上”和“向下” 可以在单个对映纯系统中通过超分子纳米纤维的温度依赖性螺旋度（P和M）倒置来获得经过滤的纺丝的取向。研究结果表明，基于螺旋非共价组装系统的材料是模块化平台，具有自旋电子应用的新兴的结构-特性关系。