Polymer-based nanocomposite foams containing carbonic fillers have greatly facilitated scientific research efforts in electromagnetic interference (EMI) shielding, as well as piezoresistive sensing devices. The carbon-based fillers not only provide superior EMI shielding properties and extraordinary gauge factor but also offer critical advantages of electromagnetic wave absorption and supreme pressure sensitivity. Currently, electromagnetic signal interference has become a severe challenge for which wireless communication is responsible. Furthermore, considering the rapid development of the flexible electronics industry, demands for piezoresistive sensors comprising a wide range of responses and increased sensitivity are considerably increased. The present work reviews recent developments and breakthroughs in polymer foam composites primarily concentrating on various high-performance carbonic nanomaterials, including graphene, carbon nanotubes (CNTs), carbon black, and their hybrid fillers. Moreover, demands for further improvement in case of technical issues, compatibility, or synergic effect of type of nanofiller on the polymer host, as well as the influence on microstructure and electrical properties of foam materials, have been elucidated in the review. To be more specific, the effect of carbonic filler size and shape, as well as its electric, microstructure, and mechanical properties, in fabricating high-performance piezoresistive and EMI shielding polymeric composite foams is covered. In addition, cutting-edge developments in carbonic polymer nanocomposite foams in EMI shielding and piezoresistive sensor applications are highlighted. To be specific, available methods for tailoring appropriate microstructure and electrical and mechanical properties in EMI shielding materials and pressure sensors, current technological challenges in fabricating and developing nanocomposite foams for such mentioned applications, and future perspectives are discussed.

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Nanotechnology is a multidisciplinary branch of science which encompasses numerous diverse fields of science and technology, ranging from biomedical, pharmaceutical, agricultural, environmental, advanced materials, chemical science, physics, electronics, information technology, and so on. Physical and Chemical properties as a major advantages of Nanoparticles can be used in various applications from Industries to medicine. Besides, Magnetic nanoparticles for medical applications have been developed by many researchers. In recent decades, it has received attention by virtue of their potential for applications in different fields. Due to several advantages and widespread applications of magnetic Nanoparticles in biotechnology, medical, material science, engineering, and environmental areas, much attention has been paid to the synthesis of different kinds of Biomagnetic nanoparticles (BMNPs). Core-shell nanoparticles include of coated various materials like: biopolymers (Chitosan, PAA) and bioceramics (Hydroxyapatite) as a shell on top of them and different hard and soft materials like metal oxide (Iron oxide and Cob alt composite) as a core. Improved properties of core-shell nanoparticles like less cytotoxicity, increase biocompatibility, decrease in an interactions with biomolecules, increase physicochemical stability and sort of that, can be due to their use in biological applications. After reviewing several research and review articles and synthesis procedure of Iron based Bio-magnetic Nanoparticles (BMNPs), we should emphasize that, It can be used in different applications like magnetic resonance imaging (MRI), drug delivery systems (DDS), immunoassay, also specially in diagnosis and treatment of cancer via hyperthermia (heat therapy) method.