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Zhang J, Chen Y, Qi J, Miao Q, Deng D, He H, Yan X, Luo L. A paper-based ratiometric fluorescence sensor based on carbon dots modified with Eu 3+ for the selective detection of tetracycline in seafood aquaculture water. Analyst 2024; 149:1571-1578. [PMID: 38285427 DOI: 10.1039/d3an02133e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2024]
Abstract
Paper-based ratiometric fluorescence sensors are normally prepared using two or more types of fluorescent materials on a paper chip for simple, low-cost and fast detection. However, the choice of multi-step and one-step modifications on the paper chip affects the analytical performance. Herein, a novel paper-based dual-emission ratiometric fluorescence sensor was designed for the selective detection of tetracycline (TC). Carbon dots (CDs) modified with Eu3+ were combined with a sealed paper-based microfluidic chip by two methods: one-step grafting of CDs-Eu3+ on paper and step-by-step grafting of CDs and Eu3+ on paper. The analytical performance was studied and optimized respectively. The red fluorescence of Eu3+ at 450 nm is enhanced and the blue fluorescence of CDs at 617 nm is quenched by energy transfer in the presence of TC. Under optimal conditions, TC is selectively determined in the linear range from 0.1 μM to 100 μM with a detection limit of 0.03 μM by the step-by-step grafting method. In addition, the sealed paper chip could effectively prevent pollution and volatilization from the reagent. This technique has been used to analyze TC in seafood aquaculture water with satisfactory results.
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Affiliation(s)
- Jialu Zhang
- School of Medicine, Shanghai University, Shanghai 200444, PR China
| | - Yuanyuan Chen
- College of Sciences, Shanghai University, Shanghai 200444, PR China.
| | - Ji Qi
- CAS Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Shandong Provincial Key Laboratory of Coastal Environmental Processes, Research Centre for Coastal Environmental Engineering and Technology, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China.
| | - Qinglan Miao
- College of Sciences, Shanghai University, Shanghai 200444, PR China.
| | - Dongmei Deng
- College of Sciences, Shanghai University, Shanghai 200444, PR China.
| | - Haibo He
- College of Sciences, Shanghai University, Shanghai 200444, PR China.
| | - Xiaoxia Yan
- College of Sciences, Shanghai University, Shanghai 200444, PR China.
| | - Liqiang Luo
- College of Sciences, Shanghai University, Shanghai 200444, PR China.
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Shen C, Zhong L, Wan P, Jia H, Liu B. Enzyme-free dual amplification biosensor based on functional nucleic acid and CDs/CoOOH for detection of leukemia fusion gene. Anal Chim Acta 2023; 1276:341623. [PMID: 37573112 DOI: 10.1016/j.aca.2023.341623] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2023] [Revised: 07/12/2023] [Accepted: 07/12/2023] [Indexed: 08/14/2023]
Abstract
Acute promyelocytic leukemia (APL) is an acute myeloid leukemia (AML) with a specific fusion gene target, PML/RARα fusion gene (PML/RARα), which is formed by the translocation of chromosomes 15 and 17. Detection of PML/RARα is the most reliable parameter for the diagnosis, treatment adjustment, efficacy evaluation, prognosis analysis and relapse prediction of APL. In this study, a novel biosensor was constructed for rapid enzyme-free detection of PML/RARα using DNAzyme and carbon dots/cobalt oxhydroxide nanosheet complexs (CDs/CoOOH). In the detection system, the separated DNAzymes could specifically recognize and bind together by the PML/RARα to form a complete DNAzyme for shearing hairpin probe (HP), then generated trigger, which was the first signal amplification. Then, trigger could hybridize with the capture probe (CP) anchored to streptavidin (SA) modified microplate as well as fluorescence quenching signal probe (SP@CDs/CoOOH). Finally, ascorbic acid (AA) was added to decompose CoOOH and the fluorescence of CDs was released, which was the second signal amplification. Through the dual signal amplification of DNAzyme and CDs/CoOOH, PML/RARα could be detected quickly and sensitively, which overcame the limitation of protein enzyme in traditional fluorescence methods, showing potential clinical application value in the diagnosis and treatment of leukemia.
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Affiliation(s)
- Chenlan Shen
- Department of Laboratory Medicine, Med+X Center for Manufacturing, West China Precision Medicine Industrial Technology Institute, West China Hospital, Sichuan University, Chengdu, Sichuan, 610041, China; Central Laboratory of Yongchuan Hospital, Chongqing Medical University, Chongqing, 402160, China; Key Laboratory of Clinical Laboratory Diagnostics (Ministry of Education), College of Laboratory Medicine, Chongqing Medical University, Chongqing, 400016, China
| | - Liang Zhong
- Key Laboratory of Clinical Laboratory Diagnostics (Ministry of Education), College of Laboratory Medicine, Chongqing Medical University, Chongqing, 400016, China
| | - Peng Wan
- Central Laboratory of Yongchuan Hospital, Chongqing Medical University, Chongqing, 402160, China; Key Laboratory of Clinical Laboratory Diagnostics (Ministry of Education), College of Laboratory Medicine, Chongqing Medical University, Chongqing, 400016, China
| | - Hengke Jia
- Department of Laboratory Medicine, Med+X Center for Manufacturing, West China Precision Medicine Industrial Technology Institute, West China Hospital, Sichuan University, Chengdu, Sichuan, 610041, China; Central Laboratory of Yongchuan Hospital, Chongqing Medical University, Chongqing, 402160, China
| | - Beizhong Liu
- Central Laboratory of Yongchuan Hospital, Chongqing Medical University, Chongqing, 402160, China; Key Laboratory of Clinical Laboratory Diagnostics (Ministry of Education), College of Laboratory Medicine, Chongqing Medical University, Chongqing, 400016, China.
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Ratiometric detection of propafenone hydrochloride with one-pot synthesized dual emissive carbon dots. CHEMICAL PAPERS 2022. [DOI: 10.1007/s11696-022-02489-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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One step synthesis of ultra-high quantum yield fluorescent carbon dots for "on-off-on" detection of Hg 2+ and biothiols. J Fluoresc 2022; 32:1921-1930. [PMID: 35763184 DOI: 10.1007/s10895-022-03001-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2022] [Accepted: 06/16/2022] [Indexed: 10/17/2022]
Abstract
In this paper, the carbon dots (CDs) with strong blue fluorescence were synthesized through hydrothermal method, which using folic acid, ammonium citrate and ethylenediamine as precursors. The prepared CDs with a high absolute quantum yield of 81.94% and showed excellent stability in high concentration salt solution and different pH conditions. With the addition of Hg2+, the signal of CDs was selectively quenched. At the same time, the CDs-Hg2+ system could be recovered after the introduction of biothiols. Moreover, the fluorescence of CDs showed a good linear relationship with Hg2+ (1-15 µM), and the detection limit as low as 0.08 µM. In addition, the prepared CDs with low toxicity could be used to detect Hg2+ in living cells and actual water samples.
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Folic Acid-Modified Cerium-Doped Carbon Dots as Photoluminescence Sensors for Cancer Cells Identification and Fe(III) Detection. CHEMOSENSORS 2022. [DOI: 10.3390/chemosensors10060219] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Carbon dots (CDs) are a new class of carbon-based luminescence materials with fascinating properties. They have been given great expectations on superseding traditional semiconductor quantum dots due to their good dispersity and stability, relatively low toxicity, superior resistance to photobleaching, and excellent biocompatibility. The diversified luminescence properties of CDs are largely due to the synthetic strategies and precursors. In view of those described above, this study has explored the possibility to establish a facile one-step hydrothermal method for the one-pot synthesis of folic acid-modified cerium-doped CDs (Ce-CDs-FA), which could be further utilized as a sensitive fluorescent nanoprobe for biosensing. This investigation demonstrates that the Ce-CDs-FA nanocomposites have nice biocompatibility and bright fluorescent properties, which can be readily utilized to detect cancer cells through recognizing overexpressing folate receptors by virtue of folic acid. Meanwhile, it is noted that the Fe3+ ion can actualize a specific and hypersensitive quenching effect for these Ce-CDs-FA nanocomposites, which can be further explored for special ion recognition, including iron ions. It raises the possibility that the as-prepared Ce-CDs-FA nanocomposites could be extended as a dual fluorescence sensor for targeted cell imaging and Fe3+ ion detection.
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DNA-templated NIR-emitting gold nanoclusters with peroxidase-like activity as a multi-signal probe for Hg2+ detection. CHINESE JOURNAL OF ANALYTICAL CHEMISTRY 2022. [DOI: 10.1016/j.cjac.2022.100118] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Lei H, Liu Q, Leng J, Liu H, Wang C, Xu M, An W, Bao C, Wang Z. Highly sensitive and selective detection of butachlor based on the resonance light scattering of doped carbon quantum dots. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2022; 14:652-660. [PMID: 35081194 DOI: 10.1039/d1ay01356d] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
In this work, a new method of resonance light scattering was developed for the sensitive and selective detection of butachlor. Firstly, buckwheat was used as the main carbon source to prepare a new type of doped carbon quantum dot using the hydrothermal method. A new method for the determination of butachlor was then established by the change in resonance light scattering intensity after the addition of butachlor into the doped carbon quantum dot solution. The detection effect was successfully optimized by investigating the optimum reaction conditions. Under the optimum conditions, the resonance light scattering intensity of doped carbon quantum dots was greatly enhanced at 460 nm after the addition of butachlor, and the intensity changes were linearly correlated with the butachlor concentration in the range of 1-7 μg L-1. The detection limit was 0.136 μg L-1, and the recoveries ranged between 98.6% and 101.8%. This method was also used for butachlor detection in environmental water.
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Affiliation(s)
- Han Lei
- School of Chemical Engineering and Technology, North University of China, Taiyuan 030051, China.
| | - Qinghao Liu
- School of Chemical Engineering and Technology, North University of China, Taiyuan 030051, China.
| | - Jiapeng Leng
- School of Pharmacy, Liaoning University of Traditional Chinese Medicine, Dalian 116600, China
| | - Hongyan Liu
- Institute of Plant Protection, Henan Academy of Agriculture Sciences, Zhengzhou 450002, China
| | - Cundong Wang
- School of Chemical Engineering and Technology, North University of China, Taiyuan 030051, China.
| | - Mingyue Xu
- School of Chemical Engineering and Technology, North University of China, Taiyuan 030051, China.
| | - Wenqing An
- School of Chemical Engineering and Technology, North University of China, Taiyuan 030051, China.
| | - Chenning Bao
- School of Chemical Engineering and Technology, North University of China, Taiyuan 030051, China.
| | - Zhen Wang
- School of Chemical Engineering and Technology, North University of China, Taiyuan 030051, China.
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He Y, Wang Y, Mao G, Liang C, Fan M. Ratiometric fluorescent nanoprobes based on carbon dots and multicolor CdTe quantum dots for multiplexed determination of heavy metal ions. Anal Chim Acta 2022; 1191:339251. [PMID: 35033275 DOI: 10.1016/j.aca.2021.339251] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2021] [Revised: 10/23/2021] [Accepted: 11/02/2021] [Indexed: 12/18/2022]
Abstract
Owing to the high risk to human and environmental health, heavy metal pollution has become a global problem. Rapid, accurate and multiplexed determination of heavy metal ions is critical. In this work, we reported a promising approach to designing ratiometric fluorescent nanoprobes for multiplexed determination of Hg2+, Cu2+, and Ag+ ions. The nanoprobes (CDs-QDx) were designed by mixing the CDs and multicolor CdTe QDs without the involvement of recognition elements. The CDs were insensitive to heavy metal ions while CdTe QDs showed the size-dependent fluorescence response to different heavy metal ions, thereby establishing a ratiometric detection scheme by measuring the fluorescence intensity ratios of CDs-QDx systems. By evaluating the detection performance, the CDs-QDx (x = 570, 650, and 702) were successfully used for differentiation and quantification of Hg2+, Cu2+, and Ag+ ions. In addition, we also carried out the detection of heavy metal ions in actual samples with acceptable results. We believed that this work offers new insight into the design of ratiometric fluorescent nanoprobe for multiplexed determination of not only heavy metals but also some other analytes by combining the CDs with CdTe QDs with fine-tuned sizes.
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Affiliation(s)
- Yuanyuan He
- School of Food and Biological Engineering, Shaanxi University of Science and Technology, Xi'an, 710021, PR China
| | - Yongbo Wang
- School of Food and Biological Engineering, Shaanxi University of Science and Technology, Xi'an, 710021, PR China.
| | - Gennian Mao
- School of Food and Biological Engineering, Shaanxi University of Science and Technology, Xi'an, 710021, PR China
| | - Chengyuan Liang
- School of Food and Biological Engineering, Shaanxi University of Science and Technology, Xi'an, 710021, PR China.
| | - Min Fan
- School of Food and Biological Engineering, Shaanxi University of Science and Technology, Xi'an, 710021, PR China
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A Disposable Electrochemical Biosensor Based on Screen-Printed Carbon Electrodes Modified with Silver Nanowires/HPMC/Chitosan/Urease for the Detection of Mercury (II) in Water. BIOSENSORS-BASEL 2021; 11:bios11100351. [PMID: 34677307 PMCID: PMC8534075 DOI: 10.3390/bios11100351] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/15/2021] [Revised: 09/15/2021] [Accepted: 09/16/2021] [Indexed: 12/15/2022]
Abstract
This work describes the facile preparation of a disposable electrochemical biosensor for the detection of Hg(II) in water by modifying the surface of a screen-printed carbon electrode (SPCE). The surface modification consists of the immobilization of a composite layer of silver nanowires, hydroxymethyl propyl cellulose, chitosan, and urease (AgNWs/HPMC/CS/Urease). The presence of the composite was confirmed by scanning electron microscopy (SEM) and its excellent conductivity, due chiefly to the electrical properties of silver nanowires, enhanced the sensitivity of the biosensor. Under optimum conditions, the modified SPCE biosensor showed excellent performance for the detection of Hg(II) ions, with an incubation time of 10 min and a linear sensitivity range of 5–25 µM. The limit of detection (LOD) and limit of quantitation (LOQ) were observed to be 3.94 µM and 6.50 µM, respectively. In addition, the disposable and portable biosensor exhibited excellent recoveries for the detection of Hg(II) ions in commercial drinking water samples (101.62–105.26%). The results are correlated with those obtained from inductively coupled plasma optical emission spectrometry (ICP-OES), indicating that our developed sensor is a reliable method for detection of Hg(II) in real water samples. The developed sensor device is a simple, effective, portable, low cost, and user-friendly platform for real-time detection of heavy metal ions in field measurements with potential for other biomedical applications in the future.
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Chen Y, Lin J, Zhang R, He S, Ding Z, Ding L. Electrochemiluminescence of water-dispersed nitrogen and sulfur doped carbon dots synthesized from amino acids. Analyst 2021; 146:5287-5293. [PMID: 34338251 DOI: 10.1039/d1an00991e] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
A facile one-pot hydrothermal approach for synthesizing water-dispersed nitrogen and sulfur doped carbon dots (NS-CDs) with high luminescence quantum yield was explored, using cysteine and tryptophan as precursors. The NS-CDs were characterized by means of FT-IR spectroscopy, XRD, TEM, etc. It was found that the absolute photoluminescence quantum yield (QY) of the NS-CDs determined with an integrating sphere can reach up to 73%, with an average decay time of 17.06 ns. Electrochemiluminescence (ECL) behaviors and mechanisms of the NS-CDs/K2S2O8 coreactant system were investigated. When the working electrode was modified with the prepared NS-CDs, the ECL efficiency of the NS-CDs with K2S2O8 was 24%, relative to Ru(bpy)3Cl2/K2S2O8. This work shows great potential for the NS-CDs to be used in bioanalytical applications.
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Affiliation(s)
- Yanhua Chen
- College of Chemistry, Jilin University, Changchun 130012, PR China.
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