One-dimensional nanohybrids based on cellulose nanocrystals and their SERS performance

Qing Zhang; Yuanyuan Zhang; Haibo Chen; Lei Zhang; Peng Li; Huining Xiao; Weibing Wu

doi:10.1016/j.carbpol.2022.119140

One-dimensional nanohybrids based on cellulose nanocrystals and their SERS performance

Carbohydr Polym. 2022 May 15:284:119140. doi: 10.1016/j.carbpol.2022.119140. Epub 2022 Jan 17.

Authors

Qing Zhang¹, Yuanyuan Zhang¹, Haibo Chen², Lei Zhang³, Peng Li², Huining Xiao⁴, Weibing Wu⁵

Affiliations

¹ Jiangsu Co-Innovation Center for Efficient Processing and Utilization of Forest Resources, College of Light Industry and Food Engineering, Nanjing Forestry University, Nanjing 210037, China.
² School of Electronic and Information Engineering, Soochow University, Suzhou 215000, Jiangsu, China.
³ Key Laboratory for Organic Electronics and Information, National Jiangsu Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing University of Posts & Telecommunications, Nanjing 210023, China. Electronic address: iamlzhang@njupt.edu.cn.
⁴ Department of Chemical Engineering, University of New Brunswick, Fredericton, NB E3B 5A3, Canada.
⁵ Jiangsu Co-Innovation Center for Efficient Processing and Utilization of Forest Resources, College of Light Industry and Food Engineering, Nanjing Forestry University, Nanjing 210037, China. Electronic address: wbwu@njfu.edu.cn.

PMID: 35287889
DOI: 10.1016/j.carbpol.2022.119140

Abstract

Controllable and uniform loading of gold nanospheres (AuNSs) on cellulose nanocrystal (CNC) were first achieved by electrostatic adsorption self-assembly. By adjusting the size, Zeta potential, and the loading ratio of AuNSs and CNC, the particle spacing of AuNSs on CNC surface was successfully regulated. This strategy provides an easy and efficient approach to construct one dimensional (1D) "hot spots", which is a key to improve the performance of surface enhanced Raman scattering spectroscopy (SERS). When used as SERS probe, the nanohybrid of CNC@AuNSs is able to detect Rhodamine 6G at the low concentration of 5 × 10^-8 g/L. Because AuNSs are fixed on CNC to form stable "hot spots", the SERS reproducibility of CNC@AuNSs is significantly improved compared to that of colloidal gold nanoparticles, which generally form unstable "hot spots" via irreversible aggregation. This type of multifunctional nanoprobe based on CNC has potential applications in the field of sensing detection.