{"title":"Polyethyleneimine-assisted one-pot synthesis of Au nanodendrites on carbon nanotube sheet as an efficient SERS substrate","authors":"Xuhuan Li, Ling Zhu, Rong Yang, Chunli Cai, Changsheng Yin, Xiaodong Shen, Wenbo Xin","doi":"10.1007/s00604-024-06887-z","DOIUrl":null,"url":null,"abstract":"<div><p> A polyethyleneimine (PEI)-assisted simple and efficient one-pot hydrothermal reduction method is reported to prepare high-quality gold nanodendrites (AuNDs) on a carbon nanotube (CNT) sheet. We observed that the prepared AuNDs have a well-defined backbone-multiple branching structure. With the systematical investigation of the growth mechanism, it was found that the bromide (Br<sup>−</sup>) ion concentration has an essential effect on the formation of AuNDs. By evaluating the growth conditions of AuNDs, it was demonstrated that PEI attached on the surface of CNT sheet plays multiple crucial roles as a reducing agent, stabilizer, and structure director in the formation of AuNDs. The prepared CNT-AuNDs hybrid was employed as a flexible surface-enhanced Raman scattering (SERS) substrate to detect the analyte Congo red (CR). Due to the unique structure of AuNDs, such as 3-D branches, rough surface, and sharp edges, the analyte can be detected efficiently down to a concentration as low as 1 × 10<sup>−8</sup> M with an enhancement factor as high as 5.6 × 10<sup>7</sup>.</p><h3>Graphical abstract</h3>\n<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":705,"journal":{"name":"Microchimica Acta","volume":"192 2","pages":""},"PeriodicalIF":5.3000,"publicationDate":"2025-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Microchimica Acta","FirstCategoryId":"92","ListUrlMain":"https://link.springer.com/article/10.1007/s00604-024-06887-z","RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, ANALYTICAL","Score":null,"Total":0}
引用次数: 0
Abstract
A polyethyleneimine (PEI)-assisted simple and efficient one-pot hydrothermal reduction method is reported to prepare high-quality gold nanodendrites (AuNDs) on a carbon nanotube (CNT) sheet. We observed that the prepared AuNDs have a well-defined backbone-multiple branching structure. With the systematical investigation of the growth mechanism, it was found that the bromide (Br−) ion concentration has an essential effect on the formation of AuNDs. By evaluating the growth conditions of AuNDs, it was demonstrated that PEI attached on the surface of CNT sheet plays multiple crucial roles as a reducing agent, stabilizer, and structure director in the formation of AuNDs. The prepared CNT-AuNDs hybrid was employed as a flexible surface-enhanced Raman scattering (SERS) substrate to detect the analyte Congo red (CR). Due to the unique structure of AuNDs, such as 3-D branches, rough surface, and sharp edges, the analyte can be detected efficiently down to a concentration as low as 1 × 10−8 M with an enhancement factor as high as 5.6 × 107.
期刊介绍：
As a peer-reviewed journal for analytical sciences and technologies on the micro- and nanoscale, Microchimica Acta has established itself as a premier forum for truly novel approaches in chemical and biochemical analysis. Coverage includes methods and devices that provide expedient solutions to the most contemporary demands in this area. Examples are point-of-care technologies, wearable (bio)sensors, in-vivo-monitoring, micro/nanomotors and materials based on synthetic biology as well as biomedical imaging and targeting.
京公网安备 11010802042870号
京ICP备2023020795号-1
分享
求助内容：
应助结果提醒方式：
扫码关注我们
