In solution‐based synthesis of colloidal nanostructures, additions of ligands, stabilizers, and redox reagents are generally required to obtain desirable structures, though ligands and stabilizers on the surface of nanostructures can substantially affect the surface‐related activity. Accordingly, an extensive rinsing process is usually required to remove residual reagents and stabilizers. This study reports a spontaneous self‐biomineralization of palladium (Pd) ions on a filamentous virus to form ligand‐free Pd nanowires under ambient conditions. No reducing reagents or additional surface stabilizers are used; the genetically modified virus alone supports the polycrystalline Pd nanowires within the nanostructure, maintaining the clean surface even without a rinsing process. The advantage of the ligand‐free Pd nanowires is found in the Suzuki‐coupling reaction, in which the nanowire catalytic activity is maintained after repeated reactions, while conventional Pd colloids undergo surface contamination by the stabilizer and lose their catalytic activity during repeated uses. The ligand‐free surface, high electronic connectivity, and structural stability of the Pd nanowires also allow high sensitivity and selectivity in hydrogen gas sensing analysis. This work emphasizes the importance of the ligand‐free surface of biotemplated nanostructures in maintaining functionalities without surface contamination.

中文翻译：

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无配体胶体钯纳米结构的病毒模板自矿化作用，可实现高表面活性和稳定性

在基于溶液的胶体纳米结构合成中，通常需要添加配体，稳定剂和氧化还原试剂以获得所需的结构，尽管纳米结构表面上的配体和稳定剂会大大影响与表面相关的活性。因此，通常需要大量的漂洗过程以除去残留的试剂和稳定剂。这项研究报告了在环境条件下，丝状病毒上钯（Pd）离子的自发自生物矿化作用，形成不含配体的Pd纳米线。不使用还原剂或其他表面稳定剂；仅转基因病毒就可以在纳米结构内支撑多晶Pd纳米线，即使没有漂洗过程也能保持清洁的表面。无配体的Pd纳米线的优点是在Suzuki偶联反应中发现的，在这种反应中，纳米线的催化活性在重复反应后得以保持，而传统的Pd胶体则受到稳定剂的表面污染，并在重复使用过程中失去催化活性。Pd纳米线的无配体表面，高电子连通性和结构稳定性也使氢气感测分析具有很高的灵敏度和选择性。这项工作强调了生物模板化纳米结构的无配体表面在保持功能性而不被表面污染方面的重要性。而传统的Pd胶体会受到稳定剂的表面污染，并在重复使用过程中失去催化活性。Pd纳米线的无配体表面，高电子连通性和结构稳定性也使氢气感测分析具有很高的灵敏度和选择性。这项工作强调了生物模板化纳米结构的无配体表面在保持功能性而不被表面污染方面的重要性。而传统的Pd胶体会受到稳定剂的表面污染，并在重复使用过程中失去催化活性。Pd纳米线的无配体表面，高电子连通性和结构稳定性也使氢气感测分析具有很高的灵敏度和选择性。这项工作强调了生物模板化纳米结构的无配体表面在保持功能性而不被表面污染方面的重要性。