Exceptional electromagnetic interference shielding and microwave absorption properties of room temperature synthesized polythiophene thin films with double negative characteristics (DNG) in the Ku-band region

Facile synthesis of coral cauliflower‐like polypyrrole hemispheres toward screening electromagnetic interference pollution

“…It is widely accepted that film thickness increases with increasing monomer concentration up to a certain extent, and starts decreasing gradually thereafter 11 . In this work, a similar trend was observed.…”

“…In addition, the real and imaginary parts of the permittivity and permeability of the MUT (ε 0 , ε 00 and μ 0 , μ 00 ) were determined using S-parameter data according to the standard Nicholson-Ross-Weir (NRW) algorithm. 11 Reflection loss (RL) is calculated from Equation 2 18 : RL = 20*log 10 S 11 j j ð2Þ…”

“…Intrinsically conducting polymers (ICPs) are the best alternatives to metal-based materials because they represent a typical class of electroactive materials possessing a unique combination of mechanical and electrical properties that may help alleviate EMI pollution. 11 ICPs exhibit adequate conductivity, low density, and high compatibility, and their facile methods of preparation under a diverse range of conditions enable them to replace traditional materials, such as metals. 12 Much work has already been performed on ICPs and ICPbased nanocomposites for microwave absorption applications.…”

Ultra-fast heat dissipating aerogels derived from polyaniline anchored cellulose nanofibers as sustainable microwave absorbers

“…Conducting polymer nanocomposites containing carbonaceous nanofillers such as CNTs and graphene have received burgeoning research interests to replace conventional metallic shields due to their high end mechanical and electrical properties (Al-Saleh & Sundararaj, 2009;Chen et al, 2016;Shen, Zhai, & Zheng, 2014;Yan et al, 2015;Yang, Gupta, Dudley, & Lawrence, 2005;Zeng et al, 2016). Moreover, intrinsically conducting polymers such as Polypyrrole (PPy) (Guo et al, 2017;Kaur, Ishpal, & Dhawan, 2012), Polythiophenes (PTs) (Dar et al, 2017;Kulkarni et al, 2019) Poly (3,4-ethylenedioxythiophene) (PEDOT) (Dalal et al, 2019;Luo, Zhang, Mei, Chang, & Yan, 2016) and Polyaniline (PANI) (Joseph, Varghese, & Sebastian, 2015;Zhang et al, 2019) has also been of great interest for EMI shielding applications. Very recently, 2D transition metal carbides and nitrides (MXene) have gathered much attention for developing next generation high performance EMI shielding materials (Cao et al, 2018;Sun et al, 2017;Wang et al, 2019;Weng et al, 2018;Zhao et al, 2018).…”

Dielectric response and electromagnetic wave absorption of novel macroporous short carbon fibers/mullite composites

“…Consequently, high‐performance EM wave absorbing materials which have drawn increasing attention are now regarded as an effective strategy to eliminate the EM pollution. Carbon‐based composites, 5‐9 metal‐based composites, 10‐14 polymer‐based composites, 15‐19 and ceramic‐based composites, 20‐24 have been extensively studied for EM wave absorption application. However, applications of carbon, metal, and polymer‐based composites are limited at elevated temperatures due to their degraded strength and EM wave absorption under oxidizing and/or corrosive atmosphere 25 .…”