{"corpus_id":225381988,"paper_sha":"c3e12602f829467135b752f0b194a9b84bcf3a31","doi":"10.1039/d0qm00461h","arxiv_id":null,"pmid":null,"pmcid":null,"mag_id":3047186288,"dblp_id":null,"acl_id":null,"title":"Synergistic engineering of dielectric and magnetic losses in M-Co/RGO nanocomposites for use in high-performance microwave absorption","year":2020,"publication_date":"2020-10-01","venue":"","journal":{"name":"Materials Chemistry Frontiers","pages":"3013-3021","volume":"4"},"journal_issn":null,"journal_title":null,"publication_types":[],"pubmed_pub_types":null,"s2_fields_of_study":["Materials Science","Physics","Engineering"],"reference_count":46,"citation_count":22,"influential_citation_count":0,"is_open_access":false,"arxiv_categories":null,"arxiv_license":null,"arxiv_journal_ref":null,"mesh_headings":null,"chemicals":null,"comments_corrections":null,"source_flags":1,"s2_open_access_pdf_url":null,"s2_open_access_landing_url":null,"s2_open_access_license":null,"s2_open_access_status":null,"pmc_open_access_pdf_url":null,"pmc_open_access_landing_url":null,"pmc_open_access_license":null,"pmc_open_access_status":null,"unpaywall_open_access_pdf_url":null,"unpaywall_open_access_landing_url":null,"unpaywall_open_access_license":null,"unpaywall_open_access_status":null,"abstract":"The development of microwave absorption materials with well-matched impedance matching and higher attenuation constants still remains a challenge, and this restricts improvement in their absorption performance. Herein, magnetic cobalt/reduced graphene oxide (M-Co/RGO) nanocomposites with enhanced microwave absorption performance were tailored by utilizing the synergy of impedance matching and attenuation constant based on the strategy of synergistic engineering of dielectric and magnetic losses. The synergistic engineering between the dielectric loss of RGO and the magnetic loss of M-Co nanoparticles enhances the impedance matching and attenuation constant and realizes improved microwave absorption. Through tuning of the mass ratio and filler loading of M-Co/RGO nanocomposites, the impedance matching and attenuation constant can reach 0.95 and 129.6, respectively, and the maximum reflection loss of −32.85 dB is achieved at 11.7 GHz. Furthermore, the tunable effective absorption bandwidth of M-Co/RGO nanocomposites can reach 8 GHz within a thickness of 2.2 mm. The dielectric and magnetic losses of M-Co/RGO nanocomposites primarily originate from dipole polarization, interfacial polarization, and multiple magnetic resonances. Undoubtedly, this strategy for synergistic engineering of dielectric and magnetic losses will provide new insight into the design of high-performance microwave absorbents.","claims":[{"public_id":"cl_78eeac7079fb528375379d33d475a038","status":"active","text":"Dielectric and magnetic losses in M-Co/RGO nanocomposites primarily originate from dipole polarization, interfacial polarization, and multiple magnetic resonances.","confidence":0.9,"contributors":[{"id":32,"public_id":"7c402c1b98","public_label":"뀨 (7c402c1b98)","roles":["extraction"],"url":"https://sah.borca.ai/u/7c402c1b98"},{"id":1,"public_id":"12632b8b5f","public_label":"Anonymous (12632b8b5f)","roles":["review"],"url":"https://sah.borca.ai/u/12632b8b5f"}],"url":"https://sah.borca.ai/claims/cl_78eeac7079fb528375379d33d475a038"},{"public_id":"cl_10b46158a19c76ebf35b4e11024b6634","status":"active","text":"M-Co/RGO nanocomposites achieve a maximum reflection loss of −32.85 dB at 11.7 GHz through synergistic engineering of dielectric and magnetic losses.","confidence":0.95,"contributors":[{"id":32,"public_id":"7c402c1b98","public_label":"뀨 (7c402c1b98)","roles":["extraction"],"url":"https://sah.borca.ai/u/7c402c1b98"},{"id":1,"public_id":"12632b8b5f","public_label":"Anonymous (12632b8b5f)","roles":["review"],"url":"https://sah.borca.ai/u/12632b8b5f"}],"url":"https://sah.borca.ai/claims/cl_10b46158a19c76ebf35b4e11024b6634"},{"public_id":"cl_6aa4448c6273a3475c40d3287e0ef68e","status":"active","text":"The impedance matching and attenuation constant of M-Co/RGO nanocomposites can reach 0.95 and 129.6, respectively, by tuning the mass ratio and filler loading.","confidence":0.95,"contributors":[{"id":32,"public_id":"7c402c1b98","public_label":"뀨 (7c402c1b98)","roles":["extraction"],"url":"https://sah.borca.ai/u/7c402c1b98"},{"id":1,"public_id":"12632b8b5f","public_label":"Anonymous (12632b8b5f)","roles":["review"],"url":"https://sah.borca.ai/u/12632b8b5f"}],"url":"https://sah.borca.ai/claims/cl_6aa4448c6273a3475c40d3287e0ef68e"},{"public_id":"cl_1b2db73cf7168083e7ed0653e6f2f6ae","status":"active","text":"The tunable effective absorption bandwidth of M-Co/RGO nanocomposites can reach 8 GHz within a thickness of 2.2 mm.","confidence":0.95,"contributors":[{"id":32,"public_id":"7c402c1b98","public_label":"뀨 (7c402c1b98)","roles":["extraction"],"url":"https://sah.borca.ai/u/7c402c1b98"},{"id":1,"public_id":"12632b8b5f","public_label":"Anonymous (12632b8b5f)","roles":["review"],"url":"https://sah.borca.ai/u/12632b8b5f"}],"url":"https://sah.borca.ai/claims/cl_1b2db73cf7168083e7ed0653e6f2f6ae"}],"concepts":[{"public_id":"co_25fea46643e498a29f753bb5c20382b7","status":"active","name":"effective absorption bandwidth","description":"Tunable bandwidth reaching 8 GHz within a thickness of 2.2 mm.","types":["metric"],"aliases":[],"contributors":[{"id":32,"public_id":"7c402c1b98","public_label":"뀨 (7c402c1b98)","roles":["extraction"],"url":"https://sah.borca.ai/u/7c402c1b98"},{"id":1,"public_id":"12632b8b5f","public_label":"Anonymous (12632b8b5f)","roles":["review"],"url":"https://sah.borca.ai/u/12632b8b5f"}],"url":"https://sah.borca.ai/concepts/co_25fea46643e498a29f753bb5c20382b7"},{"public_id":"co_450b82c192cbdc7ece572e6068e51294","status":"active","name":"attenuation constant","description":"Attenuation constant value reaching 129.6 in the optimized nanocomposites.","types":["parameter"],"aliases":[],"contributors":[{"id":32,"public_id":"7c402c1b98","public_label":"뀨 (7c402c1b98)","roles":["extraction"],"url":"https://sah.borca.ai/u/7c402c1b98"},{"id":1,"public_id":"12632b8b5f","public_label":"Anonymous (12632b8b5f)","roles":["review"],"url":"https://sah.borca.ai/u/12632b8b5f"}],"url":"https://sah.borca.ai/concepts/co_450b82c192cbdc7ece572e6068e51294"},{"public_id":"co_978d138271ce12e67a81ec2c52ea14df","status":"active","name":"multiple magnetic resonances","description":"Magnetic loss mechanism originating from multiple magnetic resonances in the nanocomposites.","types":["phenomenon"],"aliases":[],"contributors":[{"id":32,"public_id":"7c402c1b98","public_label":"뀨 (7c402c1b98)","roles":["extraction"],"url":"https://sah.borca.ai/u/7c402c1b98"},{"id":1,"public_id":"12632b8b5f","public_label":"Anonymous (12632b8b5f)","roles":["review"],"url":"https://sah.borca.ai/u/12632b8b5f"}],"url":"https://sah.borca.ai/concepts/co_978d138271ce12e67a81ec2c52ea14df"},{"public_id":"co_a3d7f927d26ddbfdbfccdbc8e9fabbe8","status":"active","name":"impedance matching","description":"Ratio of impedance matching reaching 0.95 in the optimized nanocomposites.","types":["parameter"],"aliases":[],"contributors":[{"id":32,"public_id":"7c402c1b98","public_label":"뀨 (7c402c1b98)","roles":["extraction"],"url":"https://sah.borca.ai/u/7c402c1b98"},{"id":1,"public_id":"12632b8b5f","public_label":"Anonymous (12632b8b5f)","roles":["review"],"url":"https://sah.borca.ai/u/12632b8b5f"}],"url":"https://sah.borca.ai/concepts/co_a3d7f927d26ddbfdbfccdbc8e9fabbe8"},{"public_id":"co_ba28c99338847448ed10823649f28fa6","status":"active","name":"interfacial polarization","description":"Dielectric loss mechanism originating from interfacial polarization in the nanocomposites.","types":["phenomenon"],"aliases":[],"contributors":[{"id":32,"public_id":"7c402c1b98","public_label":"뀨 (7c402c1b98)","roles":["extraction"],"url":"https://sah.borca.ai/u/7c402c1b98"},{"id":1,"public_id":"12632b8b5f","public_label":"Anonymous (12632b8b5f)","roles":["review"],"url":"https://sah.borca.ai/u/12632b8b5f"}],"url":"https://sah.borca.ai/concepts/co_ba28c99338847448ed10823649f28fa6"},{"public_id":"co_c45584bdfbbd72af936841ebb7704987","status":"active","name":"synergistic engineering of dielectric and magnetic losses","description":"Strategy to enhance impedance matching and attenuation constant by combining dielectric loss of RGO and magnetic loss of M-Co nanoparticles.","types":["method"],"aliases":[],"contributors":[{"id":32,"public_id":"7c402c1b98","public_label":"뀨 (7c402c1b98)","roles":["extraction"],"url":"https://sah.borca.ai/u/7c402c1b98"},{"id":1,"public_id":"12632b8b5f","public_label":"Anonymous (12632b8b5f)","roles":["review"],"url":"https://sah.borca.ai/u/12632b8b5f"}],"url":"https://sah.borca.ai/concepts/co_c45584bdfbbd72af936841ebb7704987"},{"public_id":"co_e0628a0e7f1b0630f1d322b35761b359","status":"active","name":"dipole polarization","description":"Dielectric loss mechanism originating from dipole polarization in the nanocomposites.","types":["phenomenon"],"aliases":[],"contributors":[{"id":32,"public_id":"7c402c1b98","public_label":"뀨 (7c402c1b98)","roles":["extraction"],"url":"https://sah.borca.ai/u/7c402c1b98"},{"id":1,"public_id":"12632b8b5f","public_label":"Anonymous (12632b8b5f)","roles":["review"],"url":"https://sah.borca.ai/u/12632b8b5f"}],"url":"https://sah.borca.ai/concepts/co_e0628a0e7f1b0630f1d322b35761b359"},{"public_id":"co_f759b498a0e466b6c17b08f9603c45a4","status":"active","name":"reflection loss","description":"Maximum microwave absorption performance measured as −32.85 dB at 11.7 GHz.","types":["metric"],"aliases":[],"contributors":[{"id":32,"public_id":"7c402c1b98","public_label":"뀨 (7c402c1b98)","roles":["extraction"],"url":"https://sah.borca.ai/u/7c402c1b98"},{"id":1,"public_id":"12632b8b5f","public_label":"Anonymous (12632b8b5f)","roles":["review"],"url":"https://sah.borca.ai/u/12632b8b5f"}],"url":"https://sah.borca.ai/concepts/co_f759b498a0e466b6c17b08f9603c45a4"},{"public_id":"co_fd0729f78d954f9e1b80e3305fb8c94f","status":"active","name":"M-Co/RGO nanocomposites","description":"Magnetic cobalt/reduced graphene oxide nanocomposites tailored for microwave absorption.","types":["material"],"aliases":[],"contributors":[{"id":32,"public_id":"7c402c1b98","public_label":"뀨 (7c402c1b98)","roles":["extraction"],"url":"https://sah.borca.ai/u/7c402c1b98"},{"id":1,"public_id":"12632b8b5f","public_label":"Anonymous (12632b8b5f)","roles":["review"],"url":"https://sah.borca.ai/u/12632b8b5f"}],"url":"https://sah.borca.ai/concepts/co_fd0729f78d954f9e1b80e3305fb8c94f"}],"external_ids":{"DOI":"10.1039/d0qm00461h","ArXiv":null,"PubMed":null,"PubMedCentral":null,"MAG":3047186288,"DBLP":null,"ACL":null},"open_access":{"is_open_access":false,"pdf_url":null,"landing_url":"https://sah.borca.ai/papers/225381988","source":null,"pdf_url_source":null,"license":null,"reason":"pdf_url_not_indexed"},"reference_availability":{"status":"available","references_indexed":true,"full_text_available":false,"full_text_source":null,"count_basis":"semantic_scholar_metadata","extraction_status":"not_applicable","reason":null},"source":{"provider":"episteme2","base_corpus":"semantic_scholar_dump","freshness_mode":"unknown","basis":["semantic_scholar_metadata","postgres_metadata"],"limits":["paper metadata is based on indexed upstream scholarly datasets","claims and concepts are available only for extracted papers","absence of claims or concepts means no extracted graph data is available in this response"],"status":"available","degraded":false,"degraded_reasons":[],"diagnostics":{"status":"available","degraded":false,"degraded_reasons":[],"metadata_status":"available","graph_status":"available","abstract_status":"available"},"source_flags":1},"paper_id":637886,"paper_uid":"828177dc-f671-4098-b7e1-6af359e0ac22","canonical_identity":{"paper_id":637886,"paper_uid":"828177dc-f671-4098-b7e1-6af359e0ac22","identity_status":"available","lookup_basis":"semantic_scholar_external_id","compatibility_path":"corpus_id"},"url":"https://sah.borca.ai/papers/225381988"}