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Yang M, Chen D, Hu J, Zheng X, Lin ZJ, Zhu H. The application of coffee-ring effect in analytical chemistry. Trends Analyt Chem 2022. [DOI: 10.1016/j.trac.2022.116752] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
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Zhou G, Li P, Ge M, Wang J, Chen S, Nie Y, Wang Y, Qin M, Huang G, Lin D, Wang H, Yang L. Controlling the Shrinkage of 3D Hot Spot Droplets as a Microreactor for Quantitative SERS Detection of Anticancer Drugs in Serum Using a Handheld Raman Spectrometer. Anal Chem 2022; 94:4831-4840. [PMID: 35254058 DOI: 10.1021/acs.analchem.2c00071] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Quantitative measurement is one of the ultimate targets for surface-enhanced Raman spectroscopy (SERS), but it suffers from difficulties in controlling the uniformity of hot spots and placing the target molecules in the hot spot space. Here, a convenient approach of three-phase equilibrium controlling the shrinkage of three-dimensional (3D) hot spot droplets has been demonstrated for the quantitative detection of the anticancer drug 5-fluorouracil (5-FU) in serum using a handheld Raman spectrometer. Droplet shrinkage, triggered by the shaking of aqueous nanoparticle (NP) colloids with immiscible oil chloroform (CHCl3) after the addition of negative ions and acetone, not only brings the nanoparticles in close proximity but can also act as a microreactor to enhance the spatial enrichment capability of the analyte in plasmonic sites and thereby realize simultaneously controlling 3D hot spots and placing target molecules in hot spots. Moreover, the shrinking process of Ag colloid droplets has been investigated using a high-speed camera, an in situ transmission electron microscope (in situ TEM), and a dark-field microscope (DFM), demonstrating the high stability and uniformity of nanoparticles in droplets. The shrunk Ag NP droplets exhibit excellent SERS sensitivity and reproducibility for the quantitative analysis of 5-FU over a large range of 50-1000 ppb. Hence, it is promising for quantitative analysis of complex systems and long-term monitoring of bioreactions.
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Affiliation(s)
- Guoliang Zhou
- Institute of Health and Medical Technology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China.,University of Science & Technology of China, Anhui, Hefei 230026, China
| | - Pan Li
- Institute of Health and Medical Technology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China.,Hefei Cancer Hospital, Chinese Academy of Sciences, Hefei 230031, China
| | - Meihong Ge
- Institute of Health and Medical Technology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China.,University of Science & Technology of China, Anhui, Hefei 230026, China
| | - Junping Wang
- Hefei Cancer Hospital, Chinese Academy of Sciences, Hefei 230031, China
| | - Siyu Chen
- Institute of Health and Medical Technology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China.,University of Science & Technology of China, Anhui, Hefei 230026, China
| | - Yuman Nie
- Institute of Intelligent Machines, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China
| | - Yaoxiong Wang
- Institute of Intelligent Machines, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China
| | - Miao Qin
- Institute of Health and Medical Technology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China.,University of Science & Technology of China, Anhui, Hefei 230026, China
| | - Guangyao Huang
- Institute of Health and Medical Technology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China.,University of Science & Technology of China, Anhui, Hefei 230026, China
| | - Dongyue Lin
- Institute of Health and Medical Technology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China
| | - Hongzhi Wang
- Hefei Cancer Hospital, Chinese Academy of Sciences, Hefei 230031, China
| | - Liangbao Yang
- Institute of Health and Medical Technology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China.,Hefei Cancer Hospital, Chinese Academy of Sciences, Hefei 230031, China
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Duan J, Liu B, Liu J. Interactions between gold, thiol and As(iii) for colorimetric sensing. Analyst 2020; 145:5166-5173. [DOI: 10.1039/d0an00946f] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Arsenite cannot crosslink glutathione-capped gold nanoparticles but a high concentration of arsenite can displace adsorbed glutathione, indicating that any two species from gold, thiol and arsenite can react.
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Affiliation(s)
- Junling Duan
- College of Chemistry and Material Science
- Shandong Agricultural University
- Tai'an
- P.R. China
- Department of Chemistry
| | - Biwu Liu
- Department of Chemistry
- Waterloo Institute for Nanotechnology
- University of Waterloo
- Waterloo
- Canada
| | - Juewen Liu
- Department of Chemistry
- Waterloo Institute for Nanotechnology
- University of Waterloo
- Waterloo
- Canada
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