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Wang Z, Liu R, Fu Z, Yi X, Hu Y, Liu C, Pan D, Wu Z. A ratiometric fluorescence sensor based on gold silver nanoclusters and tungsten disulfide quantum dots with simple fabrication for the detection of copper ions in river water. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2023; 15:2505-2511. [PMID: 37183758 DOI: 10.1039/d3ay00378g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
Copper plays a key role in the human body; meanwhile, excess Cu2+ ions can result in various diseases. Nanoclusters (NCs) are often used to measure Cu2+ ions, but there are two difficulties. On the one hand, a single probe of NCs is easily affected by environmental factors. On the other hand, it is difficult to mask the interference of Pb2+ ions and Cd2+ ions in the process of detecting Cu2+ ions. As a new type of quantum dots (QDs), tungsten disulfide quantum dots (WS2-QDs) have some advantages of simple synthesis and stable luminescence properties. Stable WS2-QDs with blue fluorescence are used as a reference probe, while gold silver nanoclusters (AuAgNCs) with red fluorescence are used as a response probe. A ratiometric fluorescent sensor was constructed by mixing the two styles of fluorescent probes, which is abbreviated as NCs/QDs. This nano-sensor can be used to detect the concentration of Cu2+ ions, in which the fluorescence of QDs does not change significantly, while the fluorescence of NCs can be quenched by Cu2+ ions. The concentration of Cu2+ ions can be determined as low as 0.12 μM with a linear range from 0.3 to 3 μM. The common interference caused by Pb2+ and Cd2+ ions can be eliminated by the phosphate buffer solution (PBS). This sensor was used to detect the concentration of Cu2+ in river water with satisfactory results.
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Affiliation(s)
- Zhiya Wang
- Hunan Provincial Key Lab of Dark Tea and Jin-hua, College of Chemistry and Material Engineering, Hunan City University, Yiyang, 413000, P. R. China.
| | - Rong Liu
- Hunan Provincial Key Lab of Dark Tea and Jin-hua, College of Chemistry and Material Engineering, Hunan City University, Yiyang, 413000, P. R. China.
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, P.R.China.
| | - Zhifang Fu
- Hunan Provincial Key Lab of Dark Tea and Jin-hua, College of Chemistry and Material Engineering, Hunan City University, Yiyang, 413000, P. R. China.
| | - Xin Yi
- Hunan Provincial Key Lab of Dark Tea and Jin-hua, College of Chemistry and Material Engineering, Hunan City University, Yiyang, 413000, P. R. China.
| | - Yongjun Hu
- Hunan Provincial Key Lab of Dark Tea and Jin-hua, College of Chemistry and Material Engineering, Hunan City University, Yiyang, 413000, P. R. China.
| | - Changhui Liu
- Hunan Provincial Key Lab of Dark Tea and Jin-hua, College of Chemistry and Material Engineering, Hunan City University, Yiyang, 413000, P. R. China.
| | - Dong Pan
- Zhejiang Addenda Advance Energy Material Co. Ltd, Huzhou 313000, P. R. China
| | - Zhaoyang Wu
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, P.R.China.
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Synthesis, self-assembly, sensing methods and mechanism of bio-source facilitated nanomaterials: A review with future outlook. ACTA ACUST UNITED AC 2020. [DOI: 10.1016/j.nanoso.2020.100498] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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Yan ZY, Du QQ, Wan DY, Lv H, Cao ZR, Wu SM. Fluorescent CdSe QDs containing Bacillus licheniformis bioprobes for Copper (II) detection in water. Enzyme Microb Technol 2017; 107:41-48. [PMID: 28899485 DOI: 10.1016/j.enzmictec.2017.08.001] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2016] [Revised: 08/01/2017] [Accepted: 08/02/2017] [Indexed: 02/06/2023]
Abstract
Quantum dots (QDs) are semiconductor nanoparticles (NPs) that offer valuable functionality for cellular labeling, drug delivery, solar cells and quantum computation. In this study, we reported that CdSe QDs could be bio-synthesized in Bacillus licheniformis. After optimization, the obtained CdSe QDs exhibited a uniform particle size of 3.71±0.04nm with a maximum fluorescence emission wavelength at 550nm and the synthetical positive ratio can reach up to 87%. Spectral properties, constitution, particle sizes and crystalline phases of the CdSe QDs were systematically and integrally investigated. The CdSe QD-containing Bacillus licheniformis cells were further used as whole fluorescent bio-probes to detect copper (II) (Cu2+) in water, which demonstrated a low limit of detection (0.91μM). The assay also showed a good selectivity for Cu2+ over other ions including Al3+, Cd2+, Mg2+, K+, Na+, NH4+, Zn2+, CH3COO+, Pb2+ and I-. Our study suggests the fluorescent CdSe QDs-containing Bacillus licheniformis bio-probes as a promising approach for detection of Cu2+ in complex solution environment.
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Affiliation(s)
- Zheng-Yu Yan
- Department of Analytical Chemistry, China Pharmaceutical University, 24 Tongjia Lane, Gulou District, Nanjing 210009, China; Key Laboratory of Drug Quality Control and Pharmacovigilance, Ministry of Education, 24 Tongjia Lane, Gulou District, Nanjing 210009, China.
| | - Qing-Qing Du
- Department of Analytical Chemistry, China Pharmaceutical University, 24 Tongjia Lane, Gulou District, Nanjing 210009, China; Key Laboratory of Drug Quality Control and Pharmacovigilance, Ministry of Education, 24 Tongjia Lane, Gulou District, Nanjing 210009, China.
| | - Dong-Yu Wan
- Department of Analytical Chemistry, China Pharmaceutical University, 24 Tongjia Lane, Gulou District, Nanjing 210009, China; Key Laboratory of Drug Quality Control and Pharmacovigilance, Ministry of Education, 24 Tongjia Lane, Gulou District, Nanjing 210009, China.
| | - Hang Lv
- Department of Analytical Chemistry, China Pharmaceutical University, 24 Tongjia Lane, Gulou District, Nanjing 210009, China.
| | - Zhi-Ran Cao
- Department of Analytical Chemistry, China Pharmaceutical University, 24 Tongjia Lane, Gulou District, Nanjing 210009, China.
| | - Sheng-Mei Wu
- Department of Analytical Chemistry, China Pharmaceutical University, 24 Tongjia Lane, Gulou District, Nanjing 210009, China; Key Laboratory of Drug Quality Control and Pharmacovigilance, Ministry of Education, 24 Tongjia Lane, Gulou District, Nanjing 210009, China.
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