Microwave shielding properties of chemically synthesized MnO 2 decorated graphene nanoribbons (GNRs) are reported for the first time. The nature of MnO 2 decoration on the GNRs has been investigated using scanning electron microscopy, X-ray diffraction, Raman spectroscopy and high resolution transmission electron microscopy. The electromagnetic interference (EMI) shielding effectiveness of this material was investigated in the microwave region . The presence of MnO 2 on GNR enhances the interfacial polarization, multiple scattering, natural resonances and the effective anisotropy energy, which leads to absorption dominated high shielding effectiveness of À57 dB (blocking >99.9999% radiation) by a 3 mm thick sample. Dielectric attributes (3 0 and 3 00 ) were evaluated to understand the mechanism of the excellent shielding effectiveness. The material will be an excellent choice for radar absorbing applications.

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The ever-growing bridge between stretchable electronic devices and wearable healthcare applications constitutes a significant challenge for discovery of novel materials for ultrasensitive wide-range healthcare monitoring. Herein, we propose a simplistic, amenable, cost-effective method for synthesis of a vertically aligned carbon nanotube (VACNT)/poly(dimethylsiloxane) (PDMS) thin-film composite structure for robust stretchable sensors with a full range of human motion and multimode mechanical stimuli detection functionalities. Notably, the sensor features the best reported response of carbon nanotube (CNT)-based sensors with extensive multiscale healthcare monitoring of subtle and vigorous ambulations ranging from 0.004 up to 30% strain deformations, coupled with an exceptionally high gauge factor of 6436.8 (at 30% strain), super-fast response time of 12 ms, recovery time of 19 ms, ultrasensitive loading sensing, and an excellent reproducibility over 10 000 cycles. The sensor evinces distinctive electromechanical performances and reliability in real time for motions like wrist pulsing, frowning, gulping, balloon inflation, finger bending, wrist bending, bending, twisting, gentle tapping, and rolling. Therefore, the VACNT/PDMS thin-film sensor reveals the ability to be a propitious candidate for e-skin and advanced wearable electronics.

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