Advanced Composites Research Group (ACRG), School of Mechanical and Aerospace Engineering , Queen's University , Belfast BT9 5AH , U.K.
Research Center for Nano-Biomaterials, Analytical & Testing Center , Sichuan University , Chengdu 610065 , China.
Langmuir. 2019 Apr 2;35(13):4577-4588. doi: 10.1021/acs.langmuir.8b03945. Epub 2019 Mar 19.
In this work, a room-temperature atmospheric pressure direct-current plasma has been deployed for the one-step synthesis of gold nanoparticle/carboxyl group-functionalized carbon nanotube (AuNP/CNT-COOH) nanohybrids in aqueous solution for the first time. Uniformly distributed AuNPs are formed on the surface of CNT-COOH, without the use of reducing agents or surfactants. The size of the AuNP can be tuned by changing the gold salt precursor concentration. UV-vis, ζ-potential, and X-ray photoelectron spectroscopy suggest that carboxyl surface functional groups on CNTs served as nucleation and growth sites for AuNPs and the multiple potential reaction pathways induced by the plasma chemistry have been elucidated in detail. The nanohybrids exhibit significantly enhanced Raman scattering and photothermal conversion efficiency that are essential for potential multimodal cancer treatment applications.
在这项工作中，首次在室温常压直流等离子体条件下，在水溶液中一步合成了金纳米颗粒/羧基功能化碳纳米管（AuNP/CNT-COOH）纳米杂化物。AuNP 均匀分布在 CNT-COOH 的表面，无需使用还原剂或表面活性剂。通过改变金盐前体的浓度可以调节 AuNP 的尺寸。紫外-可见吸收光谱、ζ-电位和 X 射线光电子能谱表明，碳纳米管上的羧基表面官能团充当了 AuNP 的成核和生长位点，详细阐明了等离子体化学诱导的多种潜在反应途径。该纳米杂化物表现出显著增强的拉曼散射和光热转换效率，这对于潜在的多模态癌症治疗应用至关重要。
