Sushmita Kumari, Madras Giridhar, Bose Suryasarathi
Centre for Nanoscience and Engineering, Indian Institute of Science, Bangalore 560012, India.
Interdisciplinary Centre for Energy Research, Indian Institute of Science, Bangalore 560012, India.
ACS Omega. 2020 Mar 5;5(10):4705-4718. doi: 10.1021/acsomega.9b03641. eCollection 2020 Mar 17.
Miniaturization of electronic devices and systems enhances the complexity of inbuilt circuitry, thereby giving rise to electromagnetic interference (EMI). EMI is a serious cause of concern as it affects the performance of a device, transmission channel, or system. In a quest to find an effective solution to this problem, several materials, apart from the conventional metals, such as carbon derivatives, have been extensively explored recently. In addition to carbon derivatives, hybrid structures such as core-shell, conjugated systems, etc. have also been researched. However, semiconducting fillers have received less attention, especially in this application. Hence, this review article will primarily focus on the systematic understanding of the use of semiconductor-based polymer nanocomposites and how the band gap plays a crucial role in deciding the dielectric properties and subsequently the electromagnetic absorption behavior for shielding applications. Our primary aim is to highlight the mechanism of shielding involved in such nanocomposites in addition to discussing the synthesis and properties that lead to effective shielding. Such nanocomposites containing semiconductors can pave the way for alternate materials for EMI shielding applications that are lightweight, flexible, and easy to integrate.
电子设备和系统的小型化增加了内置电路的复杂性，从而产生电磁干扰（EMI）。电磁干扰是一个严重的问题，因为它会影响设备、传输通道或系统的性能。为了找到解决这个问题的有效方法，除了传统金属之外，最近还广泛探索了几种材料，如碳衍生物。除了碳衍生物，核壳、共轭体系等混合结构也得到了研究。然而，半导体填料受到的关注较少，尤其是在这个应用领域。因此，这篇综述文章将主要集中于系统地理解基于半导体的聚合物纳米复合材料的应用，以及带隙如何在决定介电性能以及随后的电磁屏蔽应用中的电磁吸收行为方面发挥关键作用。我们的主要目的是除了讨论导致有效屏蔽的合成方法和性能之外，突出此类纳米复合材料中涉及的屏蔽机制。这种含有半导体的纳米复合材料可以为电磁干扰屏蔽应用的替代材料铺平道路，这些材料重量轻、柔韧性好且易于集成。
