Thermally stable polyaniline and Mn0.25Co0.75Fe2O4 nanocomposite as an efficient material for high frequency applications at room temperature

Joshi, Chandra Shekhar; Srivastava, R. C.; Joshi, Amit

doi:10.1007/s00289-023-04955-7

Cited by 4 publications

(1 citation statement)

References 62 publications

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“…In Figure h, the impedance loss for FGN and PPSC devices is plotted against the alternating current (AC) frequency, revealing a steeper slope for the PPSC device than for FGN at lower frequencies, which becomes saturated at higher frequencies, indicating an emerging conduction mechanism possibly via a hopping mode of electronic migration under an applied AC current. − The Nyquist plot in Figure i reveals 1.34 and 2.28 Ω of the solution resistance ( R s ) for FGN and PPSC devices, respectively. Furthermore, the steeper slope for FGN at higher frequencies in Figure i indicates the higher capacitive behavior. − …”

Section: Resultsmentioning

confidence: 95%

An Integrated Approach for Piezo-Electrochemical Nanoenergy Generation, Storage, and Real-Time Electromagnetic Interference Shielding Control

Singh,

Khatua

2024

ACS Appl. Mater. Interfaces

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The extensive utilization of high-end wireless electronic equipment in medical, robotics, satellite, and military communications has created a pressing challenge for real-time electromagnetic interference (EMI) control. Herein, a piezo-powered self-chargeable supercapacitor (PPSC) architecture based on an iron-doped graphitic nitride (Fe-g-C 3 N 4 : FGN) electrode with a solid piezoelectrolyte is devised, which can provide real-time controlled EMI shielding through piezo-powered self-charging voltage (SCV). This PPSC device along with real-time SCV-controlled EMI shielding also integrates additional features like nanoenergy generation and storing capability. The results demonstrate that the PPSC device is capable of exhibiting a piezo-tuned self-charging ability of up to 669.2 mV under 9.47 N of dynamic pressing for 180 s. The SCV electrostatically modifies the PPSC device that causes destructive interference and governs the absorption of electromagnetic radiation (EMR) and controls the absorptiondominated EMI shielding up to 59.2 dB at 500 mV. Additionally, the SCV-led electrification of the PPSC device also controls a unique functional transition from the EMR reflector to the EMR absorber at ∼90 mV. Hence, this strategy of tailored absorption and reflection adjustments of EMR could also potentially contribute toward the advancement of stealth technology for military armaments with externally controlled stealth capabilities.

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