%AGreen, Michael%ALiu, Zhanqiang%AXiang, Peng%ALiu, Yan%AZhou, Minjie%ATan, Xinyu%AHuang, Fuqiang%ALiu, Lei%AChen, Xiaobo%BJournal Name: Light: Science & Applications; Journal Volume: 7; Journal Issue: 1; Related Information: CHORUS Timestamp: 2022-12-20 06:04:06 %D2018%INature Publishing Group %JJournal Name: Light: Science & Applications; Journal Volume: 7; Journal Issue: 1; Related Information: CHORUS Timestamp: 2022-12-20 06:04:06 %K %MOSTI ID: 10153465 %PMedium: X %TDoped, conductive SiO2 nanoparticles for large microwave absorption %XAbstract

Although many materials have been studied for the purpose of microwave absorption, SiO2has never been reported as a good candidate. In this study, we present for the first time that doped, microwave conductive SiO2nanoparticles can possess an excellent microwave absorbing performance. A large microwave reflection loss (RL) of −55.09 dB can be obtained. The large microwave absorption originates mainly from electrical relaxation rather than the magnetic relaxation of the incoming microwave field. The electrical relaxation is attributed to a large electrical conductivity that is enabled by the incorporation of heterogeneous (N, C and Cl) atoms. The removal of the magnetic susceptibility only results in a negligible influence of the microwave absorption. In contrast, the removal of the heterogeneous atoms leads to a large decrease in the electrical conductivity and microwave absorption performance. Meanwhile, the microwave absorption characteristics can be largely adjusted with a change of the thickness, which provides large flexibility for various microwave absorption applications.

%0Journal Article