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Synthesis of Nanoporous Gold Tubes

Hierarchical materials with tailored features provide promising structures for applications requiring light‐weight, yet strong, materials. In this study, a method for synthesizing nanoporous gold tubes as a hierarchical structure is presented. Samples are fabricated via electrodeposition, homogenization, and dealloying to generate a random porous network in the tube wall. Electrodeposition parameters are optimized by using a reverse pulse current setup. As‐prepared tubes exhibit a ligament diameter of approximately 45 nm and the hierarchy of the tubes is further altered by controlling the ligament size through heat treatments.