文献类型：期刊文献

英文题名：Size effects of gold nanoparticles on activities of cellulose nanofiber-textured SERS substrates

作者：Chen, Ruoyang[1,6];Qu, Yixiao[2];Ma, Zhengyuan[2,3];Wang, Jun[4,5];He, Hui[2]

机构：[1]East China Univ Sci & Technol, Sch Phys, Shanghai 200237, Peoples R China;[2]Zhejiang Sci Tech Univ, Sch Int Educ, Hangzhou 310018, Zhejiang, Peoples R China;[3]Zhejiang Sci Tech Univ, Sch Fash Design & Engn, Hangzhou 310018, Zhejiang, Peoples R China;[4]Shanghai Polytech Univ, Sch Energy & Mat, Shanghai 201209, Peoples R China;[5]Shanghai Engn Res Ctr Adv Thermal Funct Mat, Shanghai 201209, Peoples R China;[6]Monash Univ, Dept Chem & Biol Engn, Melbourne 3168, Australia

年份：2024

卷号：31

期号：12

起止页码：7467

外文期刊名：CELLULOSE

收录：;EI(收录号：20242916726147);WOS:【SCI-EXPANDED(收录号:WOS:001268692800002)】；

基金：This work is sponsored by Shanghai Pujiang Program (No. 23PJ1401800), the National Natural Science Foundation of China (No. 12205101), the Science Foundation of Zhejiang Sci-Tech University (ZSTU) (No. 22192136-Y) and Scientific Research Fund of Zhejiang Provincial Education Department (No. Y202354119).

语种：英文

外文关键词：Surface-enhanced Raman spectroscopy (SERS); Cellulose nanofibers (CNFs); Gold nanoparticles (AuNPs); Size effects

摘要：Evaporation deposition of gold nanoparticles (AuNPs) on a glass surface textured by cellulose nanofibers (CNFs) provides an effective substrate for surface-enhanced Raman spectroscopy (SERS). The performance enhancement of such a SERS substrate hinges upon the quality and quantity of nanostructured surfaces, which are strongly correlated to the AuNP particle size. Unfortunately, the size effect of AuNPs on the Raman activity of CNF-textured SERS substrates remains unclear. Here, we investigate the Raman activity of CNF-textured SERS substrates constructed by evaporating sessile drops of AuNPs with diameters of 40 nm and 16 nm on CNF-textured surfaces, respectively. Both experimentation and computation analysis reveal that the use of 40 nm AuNPs exhibits more effective Raman activity and traps larger amounts of analyte molecules than 16 nm AuNPs. Moreover, the existence of the CNF-textured surface significantly enhances the Raman signals of analyte molecules in all regions of SERS substrates when compared with AuNPs deposited on the bare glass surface. These findings provide insights into the particle size selection for fabricating effective SERS substrates and advance applications of CNF-textured SERS substrates.