@article{Gong2025, 
author = {Xiaofeng Gong and Jing Dang and Junxiong Xiao and Xihui Wang and Tianming Jia and Li Yao and Jing-Liang Yang and Xiaosi Qi and Yunpeng Qu and Wei Zhong},
title = {Constructing core@shell SiO2@C-Au multicomponent nanocomposites to enhance conduction and polarization loss capabilities for microwave absorption and antimicrobial},
year = {2025},
journal = {Nano Research},
volume = {18},
number = {9},
pages = {94907603},
keywords = {microwave absorption, antimicrobial, core@shell structure, SiO2@C-Au, conduction and polarization loss},
url = {https://www.sciopen.com/article/10.26599/NR.2025.94907603},
doi = {10.26599/NR.2025.94907603},
abstract = {Conduction and/or polarization loss play a key role in improving electromagnetic wave (EMW) absorption. In this work, a combined polymerization and high-heat treatment process was utilized to efficiently fabricate core@shell structure SiO2@C adopting SiO2 nanospheres as a hard template. The acquired SiO2@C nanocomposites displayed unsatisfied EMW absorption performances with minimum reflection loss value of −34.92 dB at 6.35 mm, and effective absorption bandwidth value of 3.20 GHz at 4.83 mm, respectively. In order to further comprehensively boost its microwave absorption performances (MAPs), a facile self-assembly strategy was adopted to load Au nanoparticles on the outer surface of SiO2@C nanospheres, constructing core@shell SiO2@C-Au multicomponent nanocomposites (MCNCs). By regulating the volume of Au nanoparticles, different Au contents of SiO2@C-Au MCNCs could be selectively produced in high efficiencies. The obtained outcomes demonstrated that the SiO2@C-Au MCNCs presented improved properties including EMW attenuation, impedance matching, conduction loss and polarization loss with increasing the content of Au nanoparticles. Thanks to the introduction of conductive Au nanoparticles and excellent interfacial effects, the SiO2@C-Au MCNCs presented the greatly improved antimicrobial and EMW absorption performances including strong absorption, wide bandwidth and small thicknesses. Consequently, this finding offered a novel strategy to construct core@shell SiO2@C-Au MCNCs, which simultaneously boosted conduction and polarization loss capabilities for EMW absorption.}
}