†Nanomaterials Laboratory, Inorganic and Physical Chemistry Division, and ‡Biotechnology Laboratory, Medicinal Chemistry and Pharmacology, CSIR-Indian Institute of Chemical Technology, Uppal Road, Tarnaka, Hyderabad 500007, India.
ACS Appl Mater Interfaces. 2015 Apr 22;7(15):8076-82. doi: 10.1021/acsami.5b00633. Epub 2015 Apr 9.
A bioinspired mineralization route to prepare self-cleaning cotton fabrics by functionalizing their surface with nanostructured Ag@ZnO is demonstrated herein. In a polyamine-mediated mineralization process, while the nucleation, organization and coating of ZnO is done directly from water-soluble zinc salts under mild conditions, the entrapped polyamine in the ZnO matrix acts as reducing agent to generate Ag(0) from Ag(I) at room temperature. The Ag@ZnO coated cotton fabrics are characterized by FESEM, HRTEM, XRD, and UV-vis-DRS to confirm the formation and coating of Ag@ZnO particles on individual threads of the fabric. The presence of Ag nanoparticles not only enables the ZnO-coated fabrics exhibiting improved photocatalytic property but also allows for visible-light-driven activities. Furthermore, it exhibits efficient antimicrobial activity against both Gram-positive and Gram-negative bacteria. Therefore, besides these multifunctional properties, the polyamine-mediated bioinspired approach is expected to pave way for functionalization of flexible substrates under mild conditions as desirable for the development and fabrication of smart, lightweight, and wearable devices for various niche applications.
本文展示了一种仿生矿化方法，通过在棉织物表面功能化纳米结构的 Ag@ZnO 来制备自清洁棉织物。在多胺介导的矿化过程中，在温和条件下，Ag@ZnO 直接从水溶性锌盐中进行成核、组织和涂层，而嵌入在 ZnO 基体中的多胺在室温下充当还原剂，将 Ag(I)还原为 Ag(0)。Ag@ZnO 涂层棉织物通过 FESEM、HRTEM、XRD 和 UV-vis-DRS 进行表征，以确认 Ag@ZnO 颗粒在织物单根纤维上的形成和涂层。Ag 纳米颗粒的存在不仅使 ZnO 涂层织物表现出改善的光催化性能，而且还允许可见光驱动的活性。此外，它对革兰氏阳性菌和革兰氏阴性菌均表现出有效的抗菌活性。因此，除了这些多功能特性外，多胺介导的仿生方法有望为在温和条件下对柔性基底进行功能化铺平道路，这是开发和制造各种利基应用的智能、轻便和可穿戴设备所需要的。
