超弹性n中心碳量子点：合成与表征

IF 5.1 3区材料科学 Q2 MATERIALS SCIENCE, COATINGS & FILMS

Diamond and Related Materials Pub Date : 2025-06-19 DOI:10.1016/j.diamond.2025.112568

Ana Marković , Ana Popović-Bijelić , Marija Mojsin , Janez Kovač , Jaroslav Kuliček , Vladimir Pavlović , Biljana Todorović Marković , Zoran Marković

{"title":"超弹性n中心碳量子点：合成与表征","authors":"Ana Marković , Ana Popović-Bijelić , Marija Mojsin , Janez Kovač , Jaroslav Kuliček , Vladimir Pavlović , Biljana Todorović Marković , Zoran Marković","doi":"10.1016/j.diamond.2025.112568","DOIUrl":null,"url":null,"abstract":"<div><div>Carbon quantum dots (CQDs) have highly promising properties for variety of applications as a new family member of carbon-based nanomaterials. In this paper, CQDs were synthetized by solvothermal method using nicotinamide as precursor. For the first time, we report on electron paramagnetic resonance (EPR) active CQDs with numerous unpaired N radicals at the edges of CQDs. Nanomechanical measurements revealed internal structure of CQDs that are more elastic than single wall carbon nanotubes (SWCNTs). Electrostatic force microscopy showed average amount of electrons in CQDs core and positive charge at the edges. Polymer nanocomposites based on CQDs were not cytotoxic and hemolytic whereas antibacterial testing shown good antibacterial activity. Reactive oxygen species production measurements indicated that nanocomposites were highly potent generators of reactive oxygen species with singlet oxygen yield of 0.68 and promising materials for application in biomedicine.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"157 ","pages":"Article 112568"},"PeriodicalIF":5.1000,"publicationDate":"2025-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Superelastic N-centered carbon quantum dots: Synthesis and characterization\",\"authors\":\"Ana Marković , Ana Popović-Bijelić , Marija Mojsin , Janez Kovač , Jaroslav Kuliček , Vladimir Pavlović , Biljana Todorović Marković , Zoran Marković\",\"doi\":\"10.1016/j.diamond.2025.112568\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>Carbon quantum dots (CQDs) have highly promising properties for variety of applications as a new family member of carbon-based nanomaterials. In this paper, CQDs were synthetized by solvothermal method using nicotinamide as precursor. For the first time, we report on electron paramagnetic resonance (EPR) active CQDs with numerous unpaired N radicals at the edges of CQDs. Nanomechanical measurements revealed internal structure of CQDs that are more elastic than single wall carbon nanotubes (SWCNTs). Electrostatic force microscopy showed average amount of electrons in CQDs core and positive charge at the edges. Polymer nanocomposites based on CQDs were not cytotoxic and hemolytic whereas antibacterial testing shown good antibacterial activity. Reactive oxygen species production measurements indicated that nanocomposites were highly potent generators of reactive oxygen species with singlet oxygen yield of 0.68 and promising materials for application in biomedicine.</div></div>\",\"PeriodicalId\":11266,\"journal\":{\"name\":\"Diamond and Related Materials\",\"volume\":\"157 \",\"pages\":\"Article 112568\"},\"PeriodicalIF\":5.1000,\"publicationDate\":\"2025-06-19\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Diamond and Related Materials\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0925963525006259\",\"RegionNum\":3,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"MATERIALS SCIENCE, COATINGS & FILMS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Diamond and Related Materials","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0925963525006259","RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"MATERIALS SCIENCE, COATINGS & FILMS","Score":null,"Total":0}

引用次数: 0

摘要

碳量子点（CQDs）作为碳基纳米材料家族的新成员，具有广泛的应用前景。本文以烟酰胺为前驱体，采用溶剂热法制备了CQDs。我们首次报道了在电子顺磁共振（EPR）活性CQDs的边缘有许多未配对的N自由基。纳米力学测量揭示了CQDs的内部结构比单壁碳纳米管（SWCNTs）更具弹性。静电力显微镜显示，CQDs的核心中有平均数量的电子，边缘处有正电荷。基于CQDs的聚合物纳米复合材料没有细胞毒性和溶血作用，抗菌试验显示出良好的抗菌活性。活性氧生成测试表明，纳米复合材料是一种高效的活性氧生成材料，单线态氧产率为0.68，在生物医学领域具有广阔的应用前景。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Superelastic N-centered carbon quantum dots: Synthesis and characterization

查看原文本刊更多论文

Superelastic N-centered carbon quantum dots: Synthesis and characterization

Carbon quantum dots (CQDs) have highly promising properties for variety of applications as a new family member of carbon-based nanomaterials. In this paper, CQDs were synthetized by solvothermal method using nicotinamide as precursor. For the first time, we report on electron paramagnetic resonance (EPR) active CQDs with numerous unpaired N radicals at the edges of CQDs. Nanomechanical measurements revealed internal structure of CQDs that are more elastic than single wall carbon nanotubes (SWCNTs). Electrostatic force microscopy showed average amount of electrons in CQDs core and positive charge at the edges. Polymer nanocomposites based on CQDs were not cytotoxic and hemolytic whereas antibacterial testing shown good antibacterial activity. Reactive oxygen species production measurements indicated that nanocomposites were highly potent generators of reactive oxygen species with singlet oxygen yield of 0.68 and promising materials for application in biomedicine.

求助全文

通过发布文献求助，成功后即可免费获取论文全文。去求助

来源期刊

Diamond and Related Materials 工程技术-材料科学：综合

CiteScore

6.00

自引率

14.60%

发文量

702

审稿时长

2.1 months

期刊介绍： DRM is a leading international journal that publishes new fundamental and applied research on all forms of diamond, the integration of diamond with other advanced materials and development of technologies exploiting diamond. The synthesis, characterization and processing of single crystal diamond, polycrystalline films, nanodiamond powders and heterostructures with other advanced materials are encouraged topics for technical and review articles. In addition to diamond, the journal publishes manuscripts on the synthesis, characterization and application of other related materials including diamond-like carbons, carbon nanotubes, graphene, and boron and carbon nitrides. Articles are sought on the chemical functionalization of diamond and related materials as well as their use in electrochemistry, energy storage and conversion, chemical and biological sensing, imaging, thermal management, photonic and quantum applications, electron emission and electronic devices. The International Conference on Diamond and Carbon Materials has evolved into the largest and most well attended forum in the field of diamond, providing a forum to showcase the latest results in the science and technology of diamond and other carbon materials such as carbon nanotubes, graphene, and diamond-like carbon. Run annually in association with Diamond and Related Materials the conference provides junior and established researchers the opportunity to exchange the latest results ranging from fundamental physical and chemical concepts to applied research focusing on the next generation carbon-based devices.