ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Liquid crystal 5CB-loaded nanogold as new nanocatalyst combined with aptamer to determine small organic pollutants by Cu₂O resonance Rayleigh scattering probe

Han-Bing Huang, Gui-Qing Weng, Ai-Hui Liang, and Zhi-Liang Jiang

Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection (Guangxi Normal University), Ministry of Education, Guilin, China

E-mail: ahliang2008@163.com

Received: 10 March 2022  Accepted: 22 June 2022

Abstract:

A new, highly catalysis and stable liquid crystal 5CB-loaded nanogold (Au/5CB) nanosol was prepared through template method and was characterized in details. It was found that Au/5CB can strongly catalyze the new indicator reaction of fructose-Cu(II) tartrate complex to generate Cu₂O cube particles (CPs) with high resonance Rayleigh scattering effect. Combined the nanocatalytic amplification indicator reaction with the label-free aptamer (Apt) reaction, a new RRS aptasensing platform was developed to detect 0.05–1.0 ng mL⁻¹ oxytetracycline (OTC) and the limit of detection was 0.02 ng mL⁻¹. The developed RRS aptasensing platform can be also utilized to detect 7.5–60 ng mL⁻¹ malathion and 1–3.5 ng mL⁻¹ tetracyclines. Finally, the nanocatalytic reaction mechanism was studied.

Keywords: 5CB-loaded nanogold; Nanocatalytic amplification; Cu2O RRS probe; Apt; OTC

Full paper is available at www.springerlink.com.

DOI: 10.1007/s11696-022-02456-x

Chemical Papers 77 (1) 141–149 (2023)