Qing Wang,Bin Zhang,Qisheng Wang,Zhengfang Yang,Qianqian Guo,Guanbin Wen,Yanli Nie,Dongquan Wang
{"title":"Green biomass carbon points with efficient broad-spectrum antibacterial activity and widespread application.","authors":"Qing Wang,Bin Zhang,Qisheng Wang,Zhengfang Yang,Qianqian Guo,Guanbin Wen,Yanli Nie,Dongquan Wang","doi":"10.1111/nyas.15358","DOIUrl":null,"url":null,"abstract":"With low toxicity and good biocompatibility, carbon dots (CDs) are widely used in the fields of biosensing and drug delivery. In recent years, they have demonstrated excellent antimicrobial properties, thus becoming another research hotspot in the antimicrobial field. However, most of the studies showed that CDs were effective in inhibiting Gram-positive bacteria but ineffective against Gram-negative bacteria. In this study, macadamia nutshell (MNS)-CDs were prepared from the hard shells of macadamia nuts by a one-step hydrothermal method, and their appearance, morphology, structural composition, antimicrobial properties, and toxicity were investigated. The results showed that the MNS-CDs were spherical particles with an average diameter of about 4.25 nm, with hydrophilic groups, a hemolysis rate of less than 2%, good biocompatibility, and excellent antimicrobial properties against both Gram-negative and Gram-positive bacteria. The antimicrobial mechanism of these materials was also investigated. The inhibition of Gram-negative bacteria by MNS-CDs was mainly due to electrostatic interactions, while the inhibition of Gram-positive bacteria was mainly based on activated oxygen sterilization. Furthermore, MNS-CDs achieved good antimicrobial effects when applied in the fields of water purification, plates, fabrics, and food packaging, indicating that the prospects of their broad application are good.","PeriodicalId":8250,"journal":{"name":"Annals of the New York Academy of Sciences","volume":"33 1","pages":""},"PeriodicalIF":4.1000,"publicationDate":"2025-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Annals of the New York Academy of Sciences","FirstCategoryId":"103","ListUrlMain":"https://doi.org/10.1111/nyas.15358","RegionNum":3,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MULTIDISCIPLINARY SCIENCES","Score":null,"Total":0}
引用次数: 0
Abstract
With low toxicity and good biocompatibility, carbon dots (CDs) are widely used in the fields of biosensing and drug delivery. In recent years, they have demonstrated excellent antimicrobial properties, thus becoming another research hotspot in the antimicrobial field. However, most of the studies showed that CDs were effective in inhibiting Gram-positive bacteria but ineffective against Gram-negative bacteria. In this study, macadamia nutshell (MNS)-CDs were prepared from the hard shells of macadamia nuts by a one-step hydrothermal method, and their appearance, morphology, structural composition, antimicrobial properties, and toxicity were investigated. The results showed that the MNS-CDs were spherical particles with an average diameter of about 4.25 nm, with hydrophilic groups, a hemolysis rate of less than 2%, good biocompatibility, and excellent antimicrobial properties against both Gram-negative and Gram-positive bacteria. The antimicrobial mechanism of these materials was also investigated. The inhibition of Gram-negative bacteria by MNS-CDs was mainly due to electrostatic interactions, while the inhibition of Gram-positive bacteria was mainly based on activated oxygen sterilization. Furthermore, MNS-CDs achieved good antimicrobial effects when applied in the fields of water purification, plates, fabrics, and food packaging, indicating that the prospects of their broad application are good.
期刊介绍:
Published on behalf of the New York Academy of Sciences, Annals of the New York Academy of Sciences provides multidisciplinary perspectives on research of current scientific interest with far-reaching implications for the wider scientific community and society at large. Each special issue assembles the best thinking of key contributors to a field of investigation at a time when emerging developments offer the promise of new insight. Individually themed, Annals special issues stimulate new ways to think about science by providing a neutral forum for discourse—within and across many institutions and fields.