3D Nanoporous Gold‐Supported Pt Nanoparticles as Highly Accelerating Catalytic Au‐Pt Micromotors. Issue 11 (13th March 2018) - Jiang, Jin‐Zhi
Abstract: A self‐supported, nanoporous gold microelectrode decorated with various nanoparticles can be used for real‐time electrochemical monitoring, and the high performance of these electrochemical biosensors originates from their unique and seamless solid/porous nanoarchitecture. In this work, new, 3D, nanoporous, gold‐supported Pt nanoparticles are fabricated by Au‐Zn alloying/dealloying and template membrane deposition methods to produce Au‐Pt micromotors with highly accelerated motion. The speed of the micromotors can reach 1025 µm s −1 in a 10% H2 O2 solution, which is almost three times faster than unetched Au‐Pt micromotors. Four motion forms (circle, helical, circle and linear alternating, and linear) are demonstrated, and the speed of the circle motion is the fastest motion form. It is envisioned that the new fabrication method and enhanced motion can promote the micromotor efficiency for transport and delivery. Abstract : 3D, nanoporous, gold‐supported Pt nanoparticles are fabricated by Au‐Zn alloying/dealloying and template membrane deposition methods to produce Au‐Pt micromotors with highly accelerated motion. In the figure, schematic of the bubble‐driven movement of the nanoporous, gold‐supported Pt nanoparticles Au‐Pt micromotors are shown.