Shuang Yin*, Jiajun Liu, Chengyun Sun, Yao Zhang, Chen Ling, Liangliang Gan, Liqiang Liu and Ruzhong Zuo*,
{"title":"用于电磁波吸收的超长SiC纳米线","authors":"Shuang Yin*, Jiajun Liu, Chengyun Sun, Yao Zhang, Chen Ling, Liangliang Gan, Liqiang Liu and Ruzhong Zuo*, ","doi":"10.1021/acsanm.5c0015310.1021/acsanm.5c00153","DOIUrl":null,"url":null,"abstract":"<p >Ultralong cylindrical and chain-beaded SiC<sub>nw</sub> with strong wave-absorbing capabilities were successfully synthesized by carbothermal reduction, employing coconut active charcoal as a carbon source, silicon powders as a silicon source, and graphite flake as a growth matrix. The sintering temperature and holding duration considerably influenced the composition, microstructure, morphology, dielectric properties, and absorption traits of SiC<sub>nw</sub>. Elevated sintering temperature facilitated the transformation from cylindrical to chain-beaded SiC<sub>nw</sub>. Extending the holding duration from 2 h to 6 h promoted SiC<sub>nw</sub> growth in both longitudinal and transverse directions. At 1200 °C for 2 h, the cylindrical SiC<sub>nw</sub> exhibited superior absorption properties, featuring an RL of −65.40 dB at 4.5 mm and 5.32 GHz, along with an EAB of 1.66 GHz spanning 4.64–6.30 GHz. When sintered at 1200 °C for 6 h, the cylindrical SiC<sub>nw</sub> demonstrated an RL of −57.70 dB at 2.00 mm and 14.86 GHz, along with an EAB of 5.50 GHz between 12.50 and 18.00 GHz. At 1400 °C for 6 h, the chain-beaded SiC<sub>nw</sub> exhibited an RL of −47.00 dB at 3.50 mm and 5.96 GHz and an EAB of 1.56 GHz across 5.30–6.86 GHz. These insights accentuate the considerable possibilities of SiC<sub>nw</sub> in electromagnetic wave absorption applications.</p>","PeriodicalId":6,"journal":{"name":"ACS Applied Nano Materials","volume":"8 16","pages":"7939–7951 7939–7951"},"PeriodicalIF":5.5000,"publicationDate":"2025-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Ultralong SiC Nanowires for Electromagnetic Wave Absorption\",\"authors\":\"Shuang Yin*, Jiajun Liu, Chengyun Sun, Yao Zhang, Chen Ling, Liangliang Gan, Liqiang Liu and Ruzhong Zuo*, \",\"doi\":\"10.1021/acsanm.5c0015310.1021/acsanm.5c00153\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p >Ultralong cylindrical and chain-beaded SiC<sub>nw</sub> with strong wave-absorbing capabilities were successfully synthesized by carbothermal reduction, employing coconut active charcoal as a carbon source, silicon powders as a silicon source, and graphite flake as a growth matrix. The sintering temperature and holding duration considerably influenced the composition, microstructure, morphology, dielectric properties, and absorption traits of SiC<sub>nw</sub>. Elevated sintering temperature facilitated the transformation from cylindrical to chain-beaded SiC<sub>nw</sub>. Extending the holding duration from 2 h to 6 h promoted SiC<sub>nw</sub> growth in both longitudinal and transverse directions. At 1200 °C for 2 h, the cylindrical SiC<sub>nw</sub> exhibited superior absorption properties, featuring an RL of −65.40 dB at 4.5 mm and 5.32 GHz, along with an EAB of 1.66 GHz spanning 4.64–6.30 GHz. When sintered at 1200 °C for 6 h, the cylindrical SiC<sub>nw</sub> demonstrated an RL of −57.70 dB at 2.00 mm and 14.86 GHz, along with an EAB of 5.50 GHz between 12.50 and 18.00 GHz. At 1400 °C for 6 h, the chain-beaded SiC<sub>nw</sub> exhibited an RL of −47.00 dB at 3.50 mm and 5.96 GHz and an EAB of 1.56 GHz across 5.30–6.86 GHz. These insights accentuate the considerable possibilities of SiC<sub>nw</sub> in electromagnetic wave absorption applications.</p>\",\"PeriodicalId\":6,\"journal\":{\"name\":\"ACS Applied Nano Materials\",\"volume\":\"8 16\",\"pages\":\"7939–7951 7939–7951\"},\"PeriodicalIF\":5.5000,\"publicationDate\":\"2025-04-14\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"ACS Applied Nano Materials\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://pubs.acs.org/doi/10.1021/acsanm.5c00153\",\"RegionNum\":2,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"MATERIALS SCIENCE, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"ACS Applied Nano Materials","FirstCategoryId":"88","ListUrlMain":"https://pubs.acs.org/doi/10.1021/acsanm.5c00153","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
Ultralong SiC Nanowires for Electromagnetic Wave Absorption
Ultralong cylindrical and chain-beaded SiCnw with strong wave-absorbing capabilities were successfully synthesized by carbothermal reduction, employing coconut active charcoal as a carbon source, silicon powders as a silicon source, and graphite flake as a growth matrix. The sintering temperature and holding duration considerably influenced the composition, microstructure, morphology, dielectric properties, and absorption traits of SiCnw. Elevated sintering temperature facilitated the transformation from cylindrical to chain-beaded SiCnw. Extending the holding duration from 2 h to 6 h promoted SiCnw growth in both longitudinal and transverse directions. At 1200 °C for 2 h, the cylindrical SiCnw exhibited superior absorption properties, featuring an RL of −65.40 dB at 4.5 mm and 5.32 GHz, along with an EAB of 1.66 GHz spanning 4.64–6.30 GHz. When sintered at 1200 °C for 6 h, the cylindrical SiCnw demonstrated an RL of −57.70 dB at 2.00 mm and 14.86 GHz, along with an EAB of 5.50 GHz between 12.50 and 18.00 GHz. At 1400 °C for 6 h, the chain-beaded SiCnw exhibited an RL of −47.00 dB at 3.50 mm and 5.96 GHz and an EAB of 1.56 GHz across 5.30–6.86 GHz. These insights accentuate the considerable possibilities of SiCnw in electromagnetic wave absorption applications.
期刊介绍:
ACS Applied Nano Materials is an interdisciplinary journal publishing original research covering all aspects of engineering, chemistry, physics and biology relevant to applications of nanomaterials. The journal is devoted to reports of new and original experimental and theoretical research of an applied nature that integrate knowledge in the areas of materials, engineering, physics, bioscience, and chemistry into important applications of nanomaterials.