Jiankang Gao, Congying Deng, Qi Liu, Jun Jiang, Yanlin Ke, Juncong She, Jun Chen, Yu Zhang, Shaozhi Deng
{"title":"一种利用碳纳米管光纤冷阴极实现高分辨率成像的微焦点x射线源","authors":"Jiankang Gao, Congying Deng, Qi Liu, Jun Jiang, Yanlin Ke, Juncong She, Jun Chen, Yu Zhang, Shaozhi Deng","doi":"10.1016/j.carbon.2025.120893","DOIUrl":null,"url":null,"abstract":"<div><div>Facing the precising X-ray imaging applications such as medical and integrated circuit industry, high resolution micro-focal spot X-ray source is in urgent need. In this work, a novel carbon nanotube fiber (CNTF) was introduced as the microscale cold cathode for the X-ray source. The precising fabrication and field emission characteristics of CNTF cathode were carried out. The apex of the CNTF exhibited a cone-like structure with a diameter of 3.2 μm, which gives an extremely high current density of 3632.6 A/cm<sup>2</sup>, high reduced brightness of 1.14 × 10<sup>10</sup> A m<sup>−2</sup>·sr<sup>−1</sup>·V<sup>−1</sup>, low semi-angle of divergence of 11.3°, and low current fluctuation of 0.97 %. Benefit from the microscale CNTF cathode, a transmission type micro-focal spot X-ray source was assembled using a simple electrooptical structure. The measured X-ray FSS was 15.6 μm and the imaging resolution of 8.0 lp/mm was achieved at the anode voltage of 45 kV and anode current of 31.8 μA. The results demonstrated that the CNTF cold cathode based micro-focal spot X-ray source is a convenient and low-cost device solution which have a great potential in the applications of microscale object and biological tissue imaging.</div></div>","PeriodicalId":262,"journal":{"name":"Carbon","volume":"246 ","pages":"Article 120893"},"PeriodicalIF":11.6000,"publicationDate":"2025-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"A micro-focal spot X-ray source using carbon nanotube fiber cold cathode to achieve high resolution imaging\",\"authors\":\"Jiankang Gao, Congying Deng, Qi Liu, Jun Jiang, Yanlin Ke, Juncong She, Jun Chen, Yu Zhang, Shaozhi Deng\",\"doi\":\"10.1016/j.carbon.2025.120893\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>Facing the precising X-ray imaging applications such as medical and integrated circuit industry, high resolution micro-focal spot X-ray source is in urgent need. In this work, a novel carbon nanotube fiber (CNTF) was introduced as the microscale cold cathode for the X-ray source. The precising fabrication and field emission characteristics of CNTF cathode were carried out. The apex of the CNTF exhibited a cone-like structure with a diameter of 3.2 μm, which gives an extremely high current density of 3632.6 A/cm<sup>2</sup>, high reduced brightness of 1.14 × 10<sup>10</sup> A m<sup>−2</sup>·sr<sup>−1</sup>·V<sup>−1</sup>, low semi-angle of divergence of 11.3°, and low current fluctuation of 0.97 %. Benefit from the microscale CNTF cathode, a transmission type micro-focal spot X-ray source was assembled using a simple electrooptical structure. The measured X-ray FSS was 15.6 μm and the imaging resolution of 8.0 lp/mm was achieved at the anode voltage of 45 kV and anode current of 31.8 μA. The results demonstrated that the CNTF cold cathode based micro-focal spot X-ray source is a convenient and low-cost device solution which have a great potential in the applications of microscale object and biological tissue imaging.</div></div>\",\"PeriodicalId\":262,\"journal\":{\"name\":\"Carbon\",\"volume\":\"246 \",\"pages\":\"Article 120893\"},\"PeriodicalIF\":11.6000,\"publicationDate\":\"2025-09-28\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Carbon\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0008622325009091\",\"RegionNum\":2,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"CHEMISTRY, PHYSICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Carbon","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0008622325009091","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
A micro-focal spot X-ray source using carbon nanotube fiber cold cathode to achieve high resolution imaging
Facing the precising X-ray imaging applications such as medical and integrated circuit industry, high resolution micro-focal spot X-ray source is in urgent need. In this work, a novel carbon nanotube fiber (CNTF) was introduced as the microscale cold cathode for the X-ray source. The precising fabrication and field emission characteristics of CNTF cathode were carried out. The apex of the CNTF exhibited a cone-like structure with a diameter of 3.2 μm, which gives an extremely high current density of 3632.6 A/cm2, high reduced brightness of 1.14 × 1010 A m−2·sr−1·V−1, low semi-angle of divergence of 11.3°, and low current fluctuation of 0.97 %. Benefit from the microscale CNTF cathode, a transmission type micro-focal spot X-ray source was assembled using a simple electrooptical structure. The measured X-ray FSS was 15.6 μm and the imaging resolution of 8.0 lp/mm was achieved at the anode voltage of 45 kV and anode current of 31.8 μA. The results demonstrated that the CNTF cold cathode based micro-focal spot X-ray source is a convenient and low-cost device solution which have a great potential in the applications of microscale object and biological tissue imaging.
期刊介绍:
The journal Carbon is an international multidisciplinary forum for communicating scientific advances in the field of carbon materials. It reports new findings related to the formation, structure, properties, behaviors, and technological applications of carbons. Carbons are a broad class of ordered or disordered solid phases composed primarily of elemental carbon, including but not limited to carbon black, carbon fibers and filaments, carbon nanotubes, diamond and diamond-like carbon, fullerenes, glassy carbon, graphite, graphene, graphene-oxide, porous carbons, pyrolytic carbon, and other sp2 and non-sp2 hybridized carbon systems. Carbon is the companion title to the open access journal Carbon Trends. Relevant application areas for carbon materials include biology and medicine, catalysis, electronic, optoelectronic, spintronic, high-frequency, and photonic devices, energy storage and conversion systems, environmental applications and water treatment, smart materials and systems, and structural and thermal applications.