Author
Jun Ma
Other affiliations: Shenyang Aerospace University, University of Technology, Sydney, Hebei Normal University ...read more
Bio: Jun Ma is an academic researcher from Harbin Institute of Technology. The author has contributed to research in topics: Nasopharyngeal carcinoma & Medicine. The author has an hindex of 97, co-authored 1338 publications receiving 39643 citations. Previous affiliations of Jun Ma include Shenyang Aerospace University & University of Technology, Sydney.
Papers published on a yearly basis
Papers
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TL;DR: By considering good chemical homogeneity and microwave absorption, it is believed the as-fabricated Fe3O4@C composites can be promising candidates as highly effective microwave absorbers.
Abstract: Core–shell composites, Fe3O4@C, with 500 nm Fe3O4 microspheres as cores have been successfully prepared through in situ polymerization of phenolic resin on the Fe3O4 surface and subsequent high-temperature carbonization. The thickness of carbon shell, from 20 to 70 nm, can be well controlled by modulating the weight ratio of resorcinol and Fe3O4 microspheres. Carbothermic reduction has not been triggered at present conditions, thus the crystalline phase and magnetic property of Fe3O4 micropsheres can be well preserved during the carbonization process. Although carbon shells display amorphous nature, Raman spectra reveal that the presence of Fe3O4 micropsheres can promote their graphitization degree to a certain extent. Coating Fe3O4 microspheres with carbon shells will not only increase the complex permittivity but also improve characteristic impedance, leading to multiple relaxation processes in these composites, thus the microwave absorption properties of these composites are greatly enhanced. Very inte...
817 citations
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TL;DR: In this paper, a series of all solid-state polymer electrolytes based on modified poly (ethylene oxide), polycarbonate, polysiloxane, succinonitrile and organic-inorganic hybrid composite are reviewed in terms of their potential application in lithium ion batteries.
677 citations
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TL;DR: In this paper, two types of epoxy/GP nanocomposites with different interface strength using the combination of sonication and chemical modification were synthesized, and the surface modified graphene platelets (m -GP) formed clusters, showing a higher degree of dispersion and exfoliation of graphene.
475 citations
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TL;DR: Although PPy@PANI composites herein consume the incident electromagnetic wave by absolute dielectric loss, their performances are still superior or comparable to most PANI-based composites ever reported, indicating that they can be taken as a new kind of promising lightweight microwave absorbers.
Abstract: Highly uniform core–shell composites, polypyrrole@polyaniline (PPy@PANI), have been successfully constructed by directing the polymerization of aniline on the surface of PPy microspheres. The thickness of PANI shells, from 30 to 120 nm, can be well controlled by modulating the weight ratio of aniline and PPy microspheres. PPy microspheres with abundant carbonyl groups have very strong affinity to the conjugated chains of PANI, which is responsible for the spontaneous formation of uniform core–shell microstructures. However, the strong affinity between PPy microspheres and PANI shells does not promote the diffusion or reassembly of two kinds of conjugated chains. Coating PPy microspheres with PANI shells increases the complex permittivity and creates the mechanism of interfacial polarization, where the latter plays an important role in increasing the dielectric loss of PPy@PANI composites. With a proper thickness of PANI shells, the moderate dielectric loss will produce well matched characteristic impedanc...
419 citations
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TL;DR: Ecotoxicity of transformation products was estimated by ECOSAR program based on the quantitative structure-activity relationship analysis as well as by experiments using Vibrio fischeri, and results indicated that the oxidation of SO4- or CO3- with SMX generated more toxic products than those of OH.
403 citations
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TL;DR: An overview of the synthesis, properties, and applications of graphene and related materials (primarily, graphite oxide and its colloidal suspensions and materials made from them), from a materials science perspective.
Abstract: There is intense interest in graphene in fields such as physics, chemistry, and materials science, among others. Interest in graphene's exceptional physical properties, chemical tunability, and potential for applications has generated thousands of publications and an accelerating pace of research, making review of such research timely. Here is an overview of the synthesis, properties, and applications of graphene and related materials (primarily, graphite oxide and its colloidal suspensions and materials made from them), from a materials science perspective.
8,919 citations