Fig. 4: Electrical and EMI shielding properties of the Gr/PMMA nanolaminates.
From: Effective EMI shielding behaviour of thin graphene/PMMA nanolaminates in the THz range
a In-plane electrical conductivity of the nanolaminates as a function of graphene volume fraction. Red short dashed line represents the linear fitting of the experimental data for low graphene content and black dashed line represents the fitting of the experimental data to y = axb, with a = 251 S/cm and b = 1.63. Blue square symbols represent reference data for similar systems [17,18]. Star represents the conductivity value measured on a model 1 vol% nanolaminate supported on a quartz substrate. b Shielding effectiveness of the freestanding nanolaminates as a function of frequency. SE: shielding effectiveness. c Shielding effectiveness of nanolaminate with 0.33 vol% of graphene in the same experimental frequency range as in (b), for specimens with different total thicknesses. Inset: SE measured at 1 THZ as a function of thickness. d Absolute shielding effectiveness of the nanolaminates as a function of graphene volume fraction. SSEt: absolute shielding effectiveness. Star symbol represents the SSEt value measured on a model 1 vol% nanolaminate supported on a quartz substrate. e Comparison of SSEt values between Gr/PMMA nanolaminates and state-of-the-art shielding materials in the THz range [60–65]. PMMA: poly(methyl methacrylate). MWCNT: multi-walled carbon nanotubes. OLC: onion-like carbon. CNF: carbon nanofiber. PTFE: polytetrafluoroethylene. PVDF: poly(vinylidene fluoride). Ti3C2Tx: Titanium Carbide.
