Metallic glasses are perfect materials for preparing nanostructures by dealloying, but the obtained nanostructures are commonly of porous structures. Through the combination of chemical dealloying and ultrasonic vibration, ultrathin Cu&Ag bimetallic nanoporous membranes (NPMs) have been prepared from a Zr₄₈Cu₃₆Ag₈Al₈ MG ribbon. Furthermore, by introducing oxygen into the Zr₄₈Cu₃₆Ag₈Al₈ MG ribbon to change the mechanism of the dealloying process, nanoporous (Cu&Ag)@Ag core-shell alloy was synthesized by the one-pot chemical dealloying of Zr–Cu–Ag–Al–O amorphous/crystalline composite, which provides a new way to prepare metallic core–shell nanostructures by a one-pot method. The introducing of oxygen can enable the dissolution and redeposition of Cu, and tunes the Cu&Ag NPM into the nanoporous (Cu&Ag)@Ag core-shell alloy. The nanoporous (Cu&Ag)@Ag core-shell alloy exhibits better and robust antibacterial activity against E. Coli DH5α due to its better oxidation resistance caused by the Ag skin. The present work provides important insights into the tuning of nanostructures through simple dealloying.

金属玻璃是用于通过脱合金制备纳米结构的理想材料，但是获得的纳米结构通常是多孔结构。通过化学脱合金和超声振动的结合，从Zr ₄₈ Cu ₃₆ Ag ₈ Al ₈ MG碳带制备了超薄的Cu＆Ag双金属纳米多孔膜。此外，通过将氧气引入Zr ₄₈ Cu ₃₆ Ag ₈ Al ₈MG碳带改变了脱合金过程的机理，通过Zr–Cu–Ag–Al–O非晶/晶体复合材料的一锅化学脱合金工艺合成了纳米多孔（Cu＆Ag）@Ag核壳合金。用一锅法制备金属核-壳纳米结构。引入氧气可以使铜溶解和再沉积，并将铜和银的NPM调整为纳米多孔（Cu＆Ag）@Ag核壳合金。纳米多孔（铜及银）@Ag核壳合金表现出更好和针对鲁棒的抗菌活性大肠杆菌DH5 α由于由银皮肤其更好的耐氧化性。本工作通过简单的脱合金提供了对纳米结构调整的重要见解。