National Energy Technology Laboratory, U.S. Department of Energy, Pittsburgh, Pennsylvania 15236, USA.
J Am Chem Soc. 2012 Feb 22;134(7):3472-9. doi: 10.1021/ja210278u. Epub 2012 Feb 10.
Controlled self-assembly of zero-dimensional gold nanoparticles and construction of complex gold nanostructures from these building blocks could significantly extend their applications in many fields. Carbon nanotubes are one of the most promising inorganic templates for this strategy because of their unique physical, chemical, and mechanical properties, which translate into numerous potential applications. Here we report the bottom-up synthesis of gold nanowires in aqueous solution through self-assembly of gold nanoparticles on single-walled carbon nanotubes followed by thermal-heating-induced nanowelding. We investigate the mechanism of this process by exploring different graphitic templates. The experimental work is assisted by computational studies that provide additional insight into the self-assembly and nanowelding mechanism. We also demonstrate the chemical sensitivity of the nanomaterial to parts-per-billion concentrations of hydrogen sulfide with potential applications in industrial safety and personal healthcare.
通过将金纳米粒子在单壁碳纳米管上自组装，然后进行热诱导纳米焊接，我们在水溶液中自下而上合成了金纳米线。通过探索不同的石墨模板，我们研究了这个过程的机制。实验工作得到了计算研究的辅助，这些研究为自组装和纳米焊接机制提供了更多的见解。我们还展示了这种纳米材料对十亿分之几浓度的硫化氢的化学敏感性，这可能在工业安全和个人保健方面有应用。
