Visual detection of folic acid based on silica coated CdTeS quantum dots in serum samples. (December 2021)

• Record Type: Journal Article
• Authors: Yang, Min; Wang, Cunjin; Yan, Yujia; Liu, Enzhou; Hu, Xiaoyun; Hao, Hong; Fan, Jun
• Is Part Of: Materials research bulletin. Volume 144(2021)
• Publication Date: 2021-12
• Subjects: CdTeS QDs@SiO2 -- Fluorescent probe -- Visual detection -- Folic acid; Materials -- Periodicals; Crystal growth -- Periodicals; Matériaux -- Périodiques; Cristaux -- Croissance -- Périodiques; Crystal growth; Materials; Periodicals; 620.11
• DOI: 10.1016/j.materresbull.2021.111509
• Languages: English
• ISSNs: 0025-5408

Abstract

Highlights: CdTeS QDs@SiO2 nanoparticles were prepared using the sol-gel method. CdTeS QDs@SiO2 had an obvious emission in the near-infrared region. Visual detection of FA was realized based on the CdTeS QDs@SiO2 nanoparticles. The constructed fluorescent probe was used to detect FA in serum samples Abstract: Currently, folic acid (FA) has been used as an effective biomarker for early diagnosis of many diseases, so it is of practical significance to explore an ideal material with excellent performance for sensing FA. Herein, a visual fluorescent probe was creatively designed by wrapping silica shell (SiO2 ) on the surface of CdTeS quantum dots (CdTeS QDs@SiO2 ). The color change of the samples could be easily recognized by the naked eyes and was analyzed based on the red, green and blue (RGB) values obtained using ImageJ software. A good linear relationship was fitted between the ratios of F445 /F680 and FA concentrations ranging from 5 to 80 μM (R 2 =0.992) with a limit of detection (LOD) of 0.30 μM. Additionally, the proposed fluorescent probe was applied to detect FA in serum samples with satisfactory results obtained and exhibited a great potential for the quantification of FA in clinical medicine. Graphical abstract: Image, graphical abstract