Synthesis of three-dimensional graphene@nickel nanocrystals with high efficient microwave absorption

Synthesis of three-dimensional graphene@nickel nanocrystals with high efficient microwave absorption | Research Square window.SnipcartSettings = { analytics: { enabled: false } }; (function() { var accessVector = localStorage.getItem('access_vector') || ''; window.dataLayer = window.dataLayer || []; if (accessVector) { window.dataLayer.push({ user: { profile: { profileInfo: { snid: accessVector } } } }); } })(); (function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src='https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);})(window,document,'script','dataLayer','GTM-K279D39R'); Browse Preprints In Review Journals COVID-19 Preprints AJE Video Bytes Research Tools Research Promotion AJE Professional Editing AJE Rubriq About Preprint Platform In Review Editorial Policies Our Team Advisory Board Help Center Sign In Submit a Preprint Cite Share Download PDF Research Article Synthesis of three-dimensional graphene@nickel nanocrystals with high efficient microwave absorption Qi Yu, Daming Zheng, Yanan Xue, Zhengqian Zhang, Zhanyu Cao, Heng Dai This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-8689790/v1 This work is licensed under a CC BY 4.0 License Status: Posted Version 1 posted You are reading this latest preprint version Abstract In recent years, the rapid advancement of military radar technology has driven the demand for electromagnetic wave absorbing materials that are thin, wide, lightweight and strong absorption. This study utilizes a combined method of solvothermal synthesis and high-temperature calcination to fabricate a super-elastic, three-dimensional (3D) graphene anchored with magnetic nickel nanocrystals (rGO@Ni). This one-step process simultaneously achieves the self-assembly of 3D reduced graphene oxide (rGO) and the in-situ loading of magnetic nickel nanoparticles without external reducing agents. The resulting rGO@Ni composite features a 3D porous network architecture with uniformly distributed spherical nickel nanoparticles (approximately 20 nm in diameter) anchored on the graphene sheets. Compared to pure rGO or nickel, the rGO@Ni composite demonstrates superior microwave absorption performance achieving a minimum reflection loss of − 53.14 dB at 16.55 GHz with a matching thickness of only 2.5 mm. Notably, its effective absorption bandwidth (below − 10 dB) reaches 7.99 GHz, covering the frequency range from 10.01 to 18 GHz. Three-dimensional graphene nickel nanoparticles solvothermal synthesis electromagnetic parameters microwave absorption Full Text Additional Declarations No competing interests reported. Cite Share Download PDF Status: Posted Version 1 posted You are reading this latest preprint version Research Square lets you share your work early, gain feedback from the community, and start making changes to your manuscript prior to peer review in a journal. As a division of Research Square Company, we’re committed to making research communication faster, fairer, and more useful. We do this by developing innovative software and high quality services for the global research community. Our growing team is made up of researchers and industry professionals working together to solve the most critical problems facing scientific publishing. Also discoverable on Platform About Our Team In Review Editorial Policies Advisory Board Help Center Resources Author Services Accessibility API Access RSS feed Manage Cookie Preferences © Research Square 2026 | ISSN 2693-5015 (online) Privacy Policy Terms of Service Do Not Sell My Personal Information {"props":{"pageProps":{"initialData":{"identity":"rs-8689790","acceptedTermsAndConditions":true,"allowDirectSubmit":true,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":590107804,"identity":"0468fade-f85c-400c-88ff-5b2fcecaa8c0","order_by":0,"name":"Qi Yu","email":"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAZAAAAAyAQMAAABI0h/eAAAABlBMVEX///8AAABVwtN+AAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAv0lEQVRIiWNgGAWjYJCCAwkGNvX9zMwHHxCv5UFFGuPMdrZkA6K1MD44c5hxw3keMwGilBvcSN54ILGNmdn4MIMZA0ONTTQRWtIKgFrY2MwOM6Q9YDiWlttAWEuOAVALDw9Qy3EDxobDRGuRkDBuZmyTIF5LwhkDAwNmZjbitEieeVZwIKEiIUHiMBuzQQIxfuE7nrz54w+D/wn8/ec/PvhQY0NYi8IBBqQITCCkHATkGxiIj/NRMApGwSgYoQAAqcVFPBMFkugAAAAASUVORK5CYII=","orcid":"","institution":"Shenyang Aerospace University","correspondingAuthor":true,"prefix":"","firstName":"Qi","middleName":"","lastName":"Yu","suffix":""},{"id":590107805,"identity":"d8ec626d-b294-4839-90bd-688bcab3485d","order_by":1,"name":"Daming Zheng","email":"","orcid":"","institution":"Shenyang Aerospace University","correspondingAuthor":false,"prefix":"","firstName":"Daming","middleName":"","lastName":"Zheng","suffix":""},{"id":590107806,"identity":"9d0bc0af-d7af-490c-b62e-7ebbac796ee2","order_by":2,"name":"Yanan Xue","email":"","orcid":"","institution":"Shenyang Aerospace University","correspondingAuthor":false,"prefix":"","firstName":"Yanan","middleName":"","lastName":"Xue","suffix":""},{"id":590107807,"identity":"95d8e088-ae2a-41f9-b85d-999befb9fa58","order_by":3,"name":"Zhengqian Zhang","email":"","orcid":"","institution":"Shenyang Aerospace University","correspondingAuthor":false,"prefix":"","firstName":"Zhengqian","middleName":"","lastName":"Zhang","suffix":""},{"id":590107808,"identity":"97c731e1-8186-4924-809a-35e81f167ccc","order_by":4,"name":"Zhanyu Cao","email":"","orcid":"","institution":"Shenyang Aerospace University","correspondingAuthor":false,"prefix":"","firstName":"Zhanyu","middleName":"","lastName":"Cao","suffix":""},{"id":590107809,"identity":"98b0b705-384e-461f-8719-1004d8fe7f78","order_by":5,"name":"Heng Dai","email":"","orcid":"","institution":"Shenyang Aerospace University","correspondingAuthor":false,"prefix":"","firstName":"Heng","middleName":"","lastName":"Dai","suffix":""}],"badges":[],"createdAt":"2026-01-25 02:53:17","currentVersionCode":1,"declarations":"","doi":"10.21203/rs.3.rs-8689790/v1","doiUrl":"https://doi.org/10.21203/rs.3.rs-8689790/v1","draftVersion":[],"editorialEvents":[],"editorialNote":"","failedWorkflow":false,"files":[{"id":102749028,"identity":"204c43a1-0607-4279-bb59-8c448ec4ad46","added_by":"auto","created_at":"2026-02-16 09:11:52","extension":"pdf","order_by":1,"title":"","display":"","copyAsset":false,"role":"manuscript-pdf","size":1619748,"visible":true,"origin":"","legend":"","description":"","filename":"manuscript.pdf","url":"https://assets-eu.researchsquare.com/files/rs-8689790/v1_covered_a96744e6-dae8-4151-879f-d006298a4b49.pdf"}],"financialInterests":"No competing interests reported.","formattedTitle":"Synthesis of three-dimensional graphene@nickel nanocrystals with high efficient microwave absorption","fulltext":[],"fulltextSource":"","fullText":"","funders":[],"hasAdminPriorityOnWorkflow":false,"hasManuscriptDocX":false,"hasOptedInToPreprint":true,"hasPassedJournalQc":"","hasAnyPriority":false,"hideJournal":true,"highlight":"","institution":"","isAcceptedByJournal":true,"isAuthorSuppliedPdf":true,"isDeskRejected":"","isHiddenFromSearch":false,"isInQc":false,"isInWorkflow":false,"isPdf":true,"isPdfUpToDate":true,"isWithdrawnOrRetracted":false,"journal":{"display":true,"email":"[email protected]","identity":"researchsquare","isNatureJournal":false,"hasQc":true,"allowDirectSubmit":true,"externalIdentity":"","sideBox":"","snPcode":"","submissionUrl":"/submission","title":"Research Square","twitterHandle":"researchsquare","acdcEnabled":true,"dfaEnabled":false,"editorialSystem":"","reportingPortfolio":"","inReviewEnabled":false,"inReviewRevisionsEnabled":true},"keywords":"Three-dimensional graphene, nickel nanoparticles, solvothermal synthesis, electromagnetic parameters, microwave absorption","lastPublishedDoi":"10.21203/rs.3.rs-8689790/v1","lastPublishedDoiUrl":"https://doi.org/10.21203/rs.3.rs-8689790/v1","license":{"name":"CC BY 4.0","url":"https://creativecommons.org/licenses/by/4.0/"},"manuscriptAbstract":"\u003cp\u003eIn recent years, the rapid advancement of military radar technology has driven the demand for electromagnetic wave absorbing materials that are thin, wide, lightweight and strong absorption. This study utilizes a combined method of solvothermal synthesis and high-temperature calcination to fabricate a super-elastic, three-dimensional (3D) graphene anchored with magnetic nickel nanocrystals (rGO@Ni). This one-step process simultaneously achieves the self-assembly of 3D reduced graphene oxide (rGO) and the in-situ loading of magnetic nickel nanoparticles without external reducing agents. The resulting rGO@Ni composite features a 3D porous network architecture with uniformly distributed spherical nickel nanoparticles (approximately 20 nm in diameter) anchored on the graphene sheets. Compared to pure rGO or nickel, the rGO@Ni composite demonstrates superior microwave absorption performance achieving a minimum reflection loss of \u0026minus;\u0026thinsp;53.14 dB at 16.55 GHz with a matching thickness of only 2.5 mm. Notably, its effective absorption bandwidth (below \u0026minus;\u0026thinsp;10 dB) reaches 7.99 GHz, covering the frequency range from 10.01 to 18 GHz.\u003c/p\u003e","manuscriptTitle":"Synthesis of three-dimensional graphene@nickel nanocrystals with high efficient microwave absorption","msid":"","msnumber":"","nonDraftVersions":[{"code":1,"date":"2026-02-16 05:40:38","doi":"10.21203/rs.3.rs-8689790/v1","editorialEvents":[{"type":"communityComments","content":0}],"status":"published","journal":{"display":true,"email":"[email protected]","identity":"researchsquare","isNatureJournal":false,"hasQc":true,"allowDirectSubmit":true,"externalIdentity":"","sideBox":"","snPcode":"","submissionUrl":"/submission","title":"Research Square","twitterHandle":"researchsquare","acdcEnabled":true,"dfaEnabled":false,"editorialSystem":"","reportingPortfolio":"","inReviewEnabled":false,"inReviewRevisionsEnabled":true}}],"origin":"","ownerIdentity":"7b76e7c6-d4ca-49bf-9c5e-2e3c4fcb3371","owner":[],"postedDate":"February 16th, 2026","published":true,"recentEditorialEvents":[],"rejectedJournal":[],"revision":"","amendment":"","status":"posted","subjectAreas":[],"tags":[],"updatedAt":"2026-05-13T16:08:07+00:00","versionOfRecord":[],"versionCreatedAt":"2026-02-16 05:40:38","video":"","vorDoi":"","vorDoiUrl":"","workflowStages":[]},"version":"v1","identity":"rs-8689790","journalConfig":"researchsquare"},"__N_SSP":true},"page":"/article/[identity]/[[...version]]","query":{"redirect":"/article/rs-8689790","identity":"rs-8689790","version":["v1"]},"buildId":"XKTyCvWXoU3ODBz1xrDgd","isFallback":false,"isExperimentalCompile":false,"dynamicIds":[84888],"gssp":true,"scriptLoader":[]}