One dimensional(1 D) nanostructures have many possible applications in electronic, optical, and sensing devices associated with their nanosized lateral dimensions. In this regard, a general and bottom-up strategy to s...One dimensional(1 D) nanostructures have many possible applications in electronic, optical, and sensing devices associated with their nanosized lateral dimensions. In this regard, a general and bottom-up strategy to synthesize 1 D nanoparticle arrays and conductive nanowires with a facile structural/compositional control is highly desired. We herein report a protein-sheathed single walled carbon nanotube(SWNT) that satisfies the criteria for an ideal template to assemble micron-long gold nanoparticle(Au NP) linear arrays with high structural rigidity. The resulting Au NP array has minimized inter-particle gaps, which is especially useful to template the overgrowth of Ag, Pd, and Pd/Ag metals into continuous nanowires(Au@M, M=Ag, Pd, Ag/Pd). Our method successfully overcomes the incompatibility between carbon and metal materials, and the resulting superstructured metal nanowires have a tunable diameter below 100 nm and a shape closely replicating a SWNT. The Ag nanowires are composed of coalesced Au@Ag coreshell nanoparticles, while the Pd and Pd/Ag nanowires are made of very fine Pd nanocrystallites around the Au NP cores. These unique structural features are pivotal to various applications including surface enhanced Raman scattering(SERS), electrocatalysis, and gas sensors.展开更多
基金supported by the National Science Fund for Distinguished Young Scholars (21425521)the National Natural Science Foundation of China (21521001)+1 种基金the National Key Research and Development Program of China (2016YFA0201300)the Collaborative Innovation Center of Suzhou Nano Science and Technology
文摘One dimensional(1 D) nanostructures have many possible applications in electronic, optical, and sensing devices associated with their nanosized lateral dimensions. In this regard, a general and bottom-up strategy to synthesize 1 D nanoparticle arrays and conductive nanowires with a facile structural/compositional control is highly desired. We herein report a protein-sheathed single walled carbon nanotube(SWNT) that satisfies the criteria for an ideal template to assemble micron-long gold nanoparticle(Au NP) linear arrays with high structural rigidity. The resulting Au NP array has minimized inter-particle gaps, which is especially useful to template the overgrowth of Ag, Pd, and Pd/Ag metals into continuous nanowires(Au@M, M=Ag, Pd, Ag/Pd). Our method successfully overcomes the incompatibility between carbon and metal materials, and the resulting superstructured metal nanowires have a tunable diameter below 100 nm and a shape closely replicating a SWNT. The Ag nanowires are composed of coalesced Au@Ag coreshell nanoparticles, while the Pd and Pd/Ag nanowires are made of very fine Pd nanocrystallites around the Au NP cores. These unique structural features are pivotal to various applications including surface enhanced Raman scattering(SERS), electrocatalysis, and gas sensors.
