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Quaternized and boronic acid dual-functional CoAg nanozymes for label-free, stable, sensitive, and rapid quantitation detection of the bacterial total concentration

文献类型： 外文期刊

作者： Deng, Bin 1 ; Li, Shao-Bo 1 ; Chen, Jing-Wen 1 ; Liu, Fang 3 ; Liu, Jing 1 ; Zhou, Ji 4 ; Zhou, Zhong-Kai 2 ; Wang, Zai-Tian 3 ; Li, Li 2 ; Bai, Zong-Chun 2 ; Su, Meng-Xiang 1 ;

作者机构： 1.China Pharmaceut Univ, Sch Pharm, 24 Tongjiaxiang Rd, Nanjing 210009, Peoples R China

2.Jiangsu Acad Agr Sci, Inst Agr Facil & Equipment, Key Lab Protected Agr Engn Middle & Lower Reaches, Minist Agr & Rural Affairs, Nanjing, Peoples R China

3.Jiangsu Acad Agr Sci, Inst Agr Prod Proc, Nanjing 210014, Peoples R China

4.Nanjing Med Univ, Affiliated Hosp 1, Dept Resp & Crit Care Med, 300 Guangzhou Rd, Nanjing 210029, Peoples R China

关键词： Bacterial detection; Dual-functional nanozymes; Long persistent chemiluminescence

期刊名称：ANALYTICA CHIMICA ACTA （ 影响因子：6.0； 五年影响因子：5.7 ）

ISSN： 0003-2670

年卷期： 2025 年 1338 卷

页码：

收录情况： SCI

摘要： Background: Foodborne pathogenic bacteria lead to a significant increase in illnesses and fatalities annually. In the early stage of a pathogenic bacterial infection, the concentration of bacteria in food is lower than the detection limit of most technology which enhances the difficulty in diagnosis. It is a serious challenge for researchers to develop a rapid, sensitive, accurate, and stable pathogenic bacterial determination method without costly equipment and highly skilled operators. Results: It is clear that the bacterial total concentration in food increased obviously could be attributed to microbial contamination in food. Herein, quaternized and boronic acid dual-functional capped CoAg nanozymes, known as CoAg@HTCC-B, were developed and synthesized to exhibit strong and stable chemiluminescence (CL) emission to detect bacterial total concentrations. The CoAg@HTCC-B nanozymes are capable of accurately quantifying the total concentrations of a mixed bacterial solution (S. aureus and E. coli) over a broad detection range and with a low limit of detection (LOD). These nanozymes were utilized for the detection of E. coli or S. aureus in fresh chicken samples with LOD values of 2.08 colony-forming units per milliliter (CFU/mL) for E. coli and 1.71 CFU/mL for S. aureus. Significance: This suggests that the CoAg@HTCC-B nanozymes have the potential for early-stage monitoring of microbial contamination in meat samples. The capability of CoAg@HTCC-B nanozymes in swiftly and accurately detecting known bacterial concentrations suggested their potential as a viable alternative to the traditional culture-based approach for quantitatively determining known bacterial concentrations in academic, research, or industrial settings.

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