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Stretchable devices and magneto-rheological elastomers (MREs) are together studied in the present work. The device based on composites generates an impressive ~ 8.5 V, and the composites based on iron oxide (Fe2O3) act as a catalyst for magneto-sensitive behavior. The composites were prepared by solution mixing of room-temperature vulcanized silicone rubber (RTV-SR), multi-wall carbon nanotube (MWCNTs), Fe2O3, molybdenum disulfide (MoS2), and their hybrid. From the experimental results, the hybrids were exhibiting a synergistic effect in properties and MWCNT at as low as 2 per hundred parts of rubber (phr) shows the robust increase in properties of the composites. The higher properties of MWCNT were proposed due to its high aspect ratio of 65, tube shape morphology which is easy to disperse, and higher cross-link density in the composites. This work provides insight to readers on a way to obtain robust properties of composite that are good for high-performance applications in MREs and remarkable piezo-electric energy harvesting. [ABSTRACT FROM AUTHOR]

Herein, PEO/Al@SiO2 core–shell polymer nanocomposite (CSPNC) was synthesized through the casting route. The product obtained was evidenced using XRD, FTIR, FESEM, and SEM/EDS techniques. XRD patterns confirmed the semicrystalline nature of the as-synthesized film. FTIR absorption spectra confirmed the functional groups of the CSPNC film. FESEM revealed uniform polymer networks and a spherical-like shape of the bimetallic core–shell nanoparticles (BCSNPs), with average diameters ranging from 30.47 to 36.38 nm in size for the Al core and 278.55 to 428.73 nm in size for the SiO2 shell. EDS analysis revealed the presence of C, O, Al, and Si elements. All the optical coefficients were enhanced upon CSPNC loading. The reduced bandgap (direct and indirect) values of the CSPNC's film as compared to that of PEO polymer demonstrated a significant structural disorder of the PEO functional groups, which explains the localized state creation that helped the transition of electrons. The product's dielectric properties were significantly improved, and the resistance values were changed from 180 MΩ to 35 MΩ in the 100 Hz–5 MHz frequency range. Ultimately, the synthesized CSPNC is recommended for use in the fabrication of stretchable optoelectronic devices. [ABSTRACT FROM AUTHOR]