Development of a General Fabrication Strategy for Carbonaceous Noble Metal Nanocomposites with Photothermal Property

Abstract

This study demonstrates a simple hydrothermal method while can be generalized for controllable synthesis of noble metallic carbonaceous nanostructures (e.g., Au@C, Ag@C) under mild conditions (180-200°C), which also provides a unique approach for fabricating hollow carbonaceous structures by removal of cores (e.g., silver) via a redox etching process. The microstructure and composition of the as-achieved nanoparticles have been characterized using various microscopic and spectroscopic techniques. Cetyltrimethylammonium bromide (CTAB), serving as a surfactant in the reaction system, plays a key role in the formation of Ag@C, Au@C nanocables, and their corresponding hollow carbonaceous nanotubes in this work. The dynamic growth and formation mechanism of carbonaceous nanostructures was discussed in detail. And finally, laser-induced photothermal property of Au@C nanocomposites was examined. The results may be useful for designing and constructing carbonaceous metal(s) or metal oxide(s) nanostructures with potential applications in the areas of electrochemical catalysis, energy storage, adsorbents, and biomedicine.

Photo‐ and Magnetothermally Responsive Nanomaterials for Therapy, Controlled Drug Delivery and Imaging Applications

“…The main techniques for the preparation of metallic nanoparticles are reduction‐based methods (includes vigorous stirring, mild heating, and the use of a reduction agent), burst methods (synthesis of nanoparticles in organic liquids), and hydro (solvo)‐thermal (chemical reactions in solvents above their critical point at high pressure and temperature) [33] . Zhu et al (2020) reported mild condition synthesis of noble metal carbonaceous nano‐composites of Au@C. This preparation method could be applied as a general strategy for the synthesis of various carbonaceous core‐shell nanoparticles applicable in phototherapy [34] …”