51
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Lin S, Wang W, Hu C, Yang G, Ko CN, Ren K, Leung CH, Ma DL. The application of a G-quadruplex based assay with an iridium(iii) complex to arsenic ion detection and its utilization in a microfluidic chip. J Mater Chem B 2017; 5:479-484. [DOI: 10.1039/c6tb02656g] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
In this work, the iridium(iii) complex 1 was synthesized and employed in constructing an assay which is based on a G-quadruplex for detecting arsenic ions in aqueous solution.
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Affiliation(s)
- Sheng Lin
- Department of Chemistry
- Hong Kong Baptist University
- Kowloon Tong
- China
| | - Wanhe Wang
- Department of Chemistry
- Hong Kong Baptist University
- Kowloon Tong
- China
| | - Chong Hu
- Department of Chemistry
- Hong Kong Baptist University
- Kowloon Tong
- China
| | - Guanjun Yang
- State Key Laboratory of Quality Research in Chinese Medicine
- Institute of Chinese Medical Sciences
- University of Macau
- Macao
- China
| | - Chung-Nga Ko
- Department of Chemistry
- Hong Kong Baptist University
- Kowloon Tong
- China
| | - Kangning Ren
- Department of Chemistry
- Hong Kong Baptist University
- Kowloon Tong
- China
| | - Chung-Hang Leung
- State Key Laboratory of Quality Research in Chinese Medicine
- Institute of Chinese Medical Sciences
- University of Macau
- Macao
- China
| | - Dik-Lung Ma
- Department of Chemistry
- Hong Kong Baptist University
- Kowloon Tong
- China
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52
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A mini-review on functional nucleic acids-based heavy metal ion detection. Biosens Bioelectron 2016; 86:353-368. [DOI: 10.1016/j.bios.2016.06.075] [Citation(s) in RCA: 113] [Impact Index Per Article: 14.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2016] [Revised: 06/24/2016] [Accepted: 06/24/2016] [Indexed: 02/07/2023]
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53
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Du G, Wang L, Zhang D, Ni X, Zhou X, Xu H, Xu L, Wu S, Zhang T, Wang W. Colorimetric aptasensor for progesterone detection based on surfactant-induced aggregation of gold nanoparticles. Anal Biochem 2016; 514:2-7. [PMID: 27615801 DOI: 10.1016/j.ab.2016.09.006] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2016] [Revised: 09/03/2016] [Accepted: 09/06/2016] [Indexed: 02/07/2023]
Abstract
This paper proposes an aptasensor for progesterone (P4) detection in human serum and urine based on the aggregating behavior of gold nanoparticles (AuNPs) controlled by the interactions among P4-binding aptamer, target P4 and cationic surfactant hexadecyltrimethylammonium bromide (CTAB). The aptamer can form an aptamer-P4 complex with P4, leaving CTAB free to aggregate AuNPs in this aptasensor. Thus, the sensing solution will turn from red (520 nm) to blue (650 nm) in the presence of P4 because P4 aptamers are used up firstly owing to the formation of an aptamer-P4 complex, leaving CTAB free to aggregate AuNPs. However, in the absence of P4, CTAB combines with aptamers so that AuNPs still remain dispersed. Therefore, this assay makes it possible to detect P4 not only by absorbance measurement but also through naked eyes. By monitoring the variation of absorbance and color, a CTAB-induced colorimetric assay for P4 detection was established with a detection limit of 0.89 nM. Besides, the absorbance ratio A650/A520 has a linear correlation with the P4 concentration of 0.89-500 nM. Due to the excellent recoveries in serum and urine, this biosensor has great potential with respect to the visual and instrumental detection of P4 in biological fluids.
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Affiliation(s)
- Gaoshang Du
- School of Agriculture and Biology, Key Laboratory of Urban Agriculture (South), Ministry of Agriculture, Bor S. Luh Food Safety Research Center, Shanghai Jiao Tong University, Shanghai, 200240, PR China
| | - Lumei Wang
- School of Agriculture and Biology, Key Laboratory of Urban Agriculture (South), Ministry of Agriculture, Bor S. Luh Food Safety Research Center, Shanghai Jiao Tong University, Shanghai, 200240, PR China.
| | - Dongwei Zhang
- School of Agriculture and Biology, Key Laboratory of Urban Agriculture (South), Ministry of Agriculture, Bor S. Luh Food Safety Research Center, Shanghai Jiao Tong University, Shanghai, 200240, PR China
| | - Xuan Ni
- School of Agriculture and Biology, Key Laboratory of Urban Agriculture (South), Ministry of Agriculture, Bor S. Luh Food Safety Research Center, Shanghai Jiao Tong University, Shanghai, 200240, PR China
| | - Xiaotong Zhou
- School of Agriculture and Biology, Key Laboratory of Urban Agriculture (South), Ministry of Agriculture, Bor S. Luh Food Safety Research Center, Shanghai Jiao Tong University, Shanghai, 200240, PR China
| | - Hanyi Xu
- School of Agriculture and Biology, Key Laboratory of Urban Agriculture (South), Ministry of Agriculture, Bor S. Luh Food Safety Research Center, Shanghai Jiao Tong University, Shanghai, 200240, PR China
| | - Lurong Xu
- School of Agriculture and Biology, Key Laboratory of Urban Agriculture (South), Ministry of Agriculture, Bor S. Luh Food Safety Research Center, Shanghai Jiao Tong University, Shanghai, 200240, PR China
| | - Shijian Wu
- Shanghai Environmental Monitoring Center, Shanghai 200235, PR China
| | - Tong Zhang
- School of Agriculture and Biology, Key Laboratory of Urban Agriculture (South), Ministry of Agriculture, Bor S. Luh Food Safety Research Center, Shanghai Jiao Tong University, Shanghai, 200240, PR China
| | - Wenhao Wang
- School of Agriculture and Biology, Key Laboratory of Urban Agriculture (South), Ministry of Agriculture, Bor S. Luh Food Safety Research Center, Shanghai Jiao Tong University, Shanghai, 200240, PR China
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54
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Zhou Y, Chi H, Wu Y, Marks RS, Steele TWJ. Organic additives stabilize RNA aptamer binding of malachite green. Talanta 2016; 160:172-182. [PMID: 27591602 DOI: 10.1016/j.talanta.2016.06.067] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2016] [Revised: 06/29/2016] [Accepted: 06/30/2016] [Indexed: 11/27/2022]
Abstract
Aptamer-ligand binding has been utilized for biological applications due to its specific binding and synthetic nature. However, the applications will be limited if the binding or the ligand is unstable. Malachite green aptamer (MGA) and its labile ligand malachite green (MG) were found to have increasing apparent dissociation constants (Kd) as determined through the first order rate loss of emission intensity of the MGA-MG fluorescent complex. The fluorescent intensity loss was hypothesized to be from the hydrolysis of MG into malachite green carbinol base (MGOH). Random screening organic additives were found to reduce or retain the fluorescence emission and the calculated apparent Kd of MGA-MG binding. The protective effect became more apparent as the percentage of organic additives increased up to 10% v/v. The mechanism behind the organic additive protective effects was primarily from a ~5X increase in first order rate kinetics of MGOH→MG (kMGOH→MG), which significantly changed the equilibrium constant (Keq), favoring the generation of MG, versus MGOH without organic additives. A simple way has been developed to stabilize the apparent Kd of MGA-MG binding over 24h, which may be beneficial in stabilizing other triphenylmethane or carbocation ligand-aptamer interactions that are susceptible to SN1 hydrolysis.
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Affiliation(s)
- Yubin Zhou
- School of Materials Science & Engineering, College of Engineering, Nanyang Technological University50 Nanyang AvenueSingapore639798Singapore
| | - Hong Chi
- School of Materials Science & Engineering, College of Engineering, Nanyang Technological University50 Nanyang AvenueSingapore639798Singapore
| | - Yuanyuan Wu
- School of Materials Science & Engineering, College of Engineering, Nanyang Technological University50 Nanyang AvenueSingapore639798Singapore
| | - Robert S Marks
- School of Materials Science & Engineering, College of Engineering, Nanyang Technological University50 Nanyang AvenueSingapore639798Singapore; Department of Biotechnology Engineering, Faculty of Engineering Sciences, Ben Gurion University of the NegevP.O. Box 653Beer Sheva84105Israel
| | - Terry W J Steele
- School of Materials Science & Engineering, College of Engineering, Nanyang Technological University50 Nanyang AvenueSingapore639798Singapore.
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55
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A label-free colorimetric progesterone aptasensor based on the aggregation of gold nanoparticles. Mikrochim Acta 2016. [DOI: 10.1007/s00604-016-1861-0] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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56
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Ren W, Zhang Y, Chen HG, Gao ZF, Li NB, Luo HQ. Ultrasensitive Label-Free Resonance Rayleigh Scattering Aptasensor for Hg(2+) Using Hg(2+)-Triggered Exonuclease III-Assisted Target Recycling and Growth of G-Wires for Signal Amplification. Anal Chem 2016; 88:1385-90. [PMID: 26704253 DOI: 10.1021/acs.analchem.5b03972] [Citation(s) in RCA: 105] [Impact Index Per Article: 13.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
A novel signal-on and label-free resonance Rayleigh scattering (RRS) aptasensor was constructed for detection of Hg(2+) based on Hg(2+)-triggered Exonuclease III-assisted target recycling and growth of G-quadruplex nanowires (G-wires) for signal amplification. The hairpin DNA (H-DNA) was wisely designed with thymine-rich recognition termini and a G-quadruplex sequence in the loop and employed as a signal probe for specially recognizing trace Hg(2+) by a stable T-Hg(2+)-T structure, which automatically triggered Exonuclease III (Exo-III) digestion to recycle Hg(2+) and liberate the G-quadruplex sequence. The free G-quadruplex sequences were self-assembled into guanine nanowire (G-wire) superstructure in the presence of Mg(2+) and demonstrated by gel electrophoresis. The RRS intensity was dramatically amplified by the resultant G-wires, and the maximum RRS signal at 370 nm was linear with the logarithm of Hg(2+) concentration in the range of 50.0 pM to 500.0 nM (R = 0.9957). Selectivity experiments revealed that the as-prepared RRS sensor was specific for Hg(2+), even coexisting with high concentrations of other metal ions. This optical aptasensor was successfully applied to identify Hg(2+) in laboratory tap water and river water samples. With excellent sensitivity and selectivity, the proposed RRS aptasensor was potentially suitable for not only routine detection of Hg(2+) in environmental monitoring but also various target detection just by changing the recognition sequence of the H-DNA probe.
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Affiliation(s)
- Wang Ren
- Key Laboratory of Eco-environments in Three Gorges Reservoir Region (Ministry of Education), School of Chemistry and Chemical Engineering, Southwest University , Chongqing 400715, People's Republic of China.,College of Chemistry and Pharmaceutical Engineering, Sichuan Provincial Academician (Expert) Workstation, Key Laboratory of Green Catalysis of Higher Education Institutes of Sichuan, Sichuan University of Science and Engineering , Zigong 643000, People's Republic of China
| | - Ying Zhang
- Key Laboratory of Eco-environments in Three Gorges Reservoir Region (Ministry of Education), School of Chemistry and Chemical Engineering, Southwest University , Chongqing 400715, People's Republic of China.,College of Chemistry and Pharmaceutical Engineering, Sichuan Provincial Academician (Expert) Workstation, Key Laboratory of Green Catalysis of Higher Education Institutes of Sichuan, Sichuan University of Science and Engineering , Zigong 643000, People's Republic of China
| | - Hong Guo Chen
- Key Laboratory of Eco-environments in Three Gorges Reservoir Region (Ministry of Education), School of Chemistry and Chemical Engineering, Southwest University , Chongqing 400715, People's Republic of China
| | - Zhong Feng Gao
- Key Laboratory of Eco-environments in Three Gorges Reservoir Region (Ministry of Education), School of Chemistry and Chemical Engineering, Southwest University , Chongqing 400715, People's Republic of China
| | - Nian Bing Li
- Key Laboratory of Eco-environments in Three Gorges Reservoir Region (Ministry of Education), School of Chemistry and Chemical Engineering, Southwest University , Chongqing 400715, People's Republic of China
| | - Hong Qun Luo
- Key Laboratory of Eco-environments in Three Gorges Reservoir Region (Ministry of Education), School of Chemistry and Chemical Engineering, Southwest University , Chongqing 400715, People's Republic of China
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57
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Cui L, Wu J, Ju H. Label-free signal-on aptasensor for sensitive electrochemical detection of arsenite. Biosens Bioelectron 2016; 79:861-5. [PMID: 26785310 DOI: 10.1016/j.bios.2016.01.010] [Citation(s) in RCA: 66] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2015] [Revised: 12/22/2015] [Accepted: 01/05/2016] [Indexed: 12/29/2022]
Abstract
A signal-on aptasensor was fabricated for highly sensitive and selective electrochemical detection of arsenite with a label-free Ars-3 aptamer self-assembled on a screen-printed carbon electrode (SPCE) via Au-S bond. The Ars-3 aptamer could adsorb cationic polydiallyldimethylammonium (PDDA) via electrostatic interaction to repel other cationic species. In the presence of arsenite, the change of Ars-3 conformation due to the formation of Ars-3/arsenite complex led to less adsorption of PDDA, and the complex could adsorb more positively charged [Ru(NH3)6](3+) as an electrochemically active indicator on the aptasensor surface, which produced a sensitive "turn-on" response. The target-induced structure switching could be used for sensitive detection of arsenite with a linear range from 0.2 nM to 100 nM and a detection limit down to 0.15 nM. Benefiting from Ars-3 aptamer, the proposed system exhibited excellent specificity against other heavy metal ions. The SPCE-based aptasensor exhibited the advantages of low cost and simple fabrication, providing potential application of arsenite detection in environment.
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Affiliation(s)
- Lin Cui
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, PR China
| | - Jie Wu
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, PR China
| | - Huangxian Ju
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, PR China.
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58
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Song L, Mao K, Zhou X, Hu J. A novel biosensor based on Au@Ag core–shell nanoparticles for SERS detection of arsenic (III). Talanta 2016; 146:285-90. [DOI: 10.1016/j.talanta.2015.08.052] [Citation(s) in RCA: 101] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2015] [Revised: 08/16/2015] [Accepted: 08/24/2015] [Indexed: 12/16/2022]
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59
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Wang Y, Wang P, Wang Y, He X, Wang K. Single strand DNA functionalized single wall carbon nanotubes as sensitive electrochemical labels for arsenite detection. Talanta 2015; 141:122-7. [DOI: 10.1016/j.talanta.2015.03.040] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2014] [Revised: 03/16/2015] [Accepted: 03/22/2015] [Indexed: 12/17/2022]
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60
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Li J, Wang J, Guo X, Zheng Q, Peng J, Tang H, Yao S. Carbon Nanotubes Labeled with Aptamer and Horseradish Peroxidase as a Probe for Highly Sensitive Protein Biosensing by Postelectropolymerization of Insoluble Precipitates on Electrodes. Anal Chem 2015; 87:7610-7. [DOI: 10.1021/acs.analchem.5b00640] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Jing Li
- Key
Laboratory of Chemical Biology and Traditional Chinese Medicine Research
(Ministry of Education), College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha 410081, P. R. China
- Department
of Chemical Engineering and Textile, Shaanxi Polytechnic Institute, Xianyang 721000, P. R. China
| | - Jingjing Wang
- Key
Laboratory of Chemical Biology and Traditional Chinese Medicine Research
(Ministry of Education), College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha 410081, P. R. China
| | - Xiang Guo
- Key
Laboratory of Chemical Biology and Traditional Chinese Medicine Research
(Ministry of Education), College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha 410081, P. R. China
| | - Qiong Zheng
- Key
Laboratory of Chemical Biology and Traditional Chinese Medicine Research
(Ministry of Education), College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha 410081, P. R. China
| | - Jing Peng
- Key
Laboratory of Chemical Biology and Traditional Chinese Medicine Research
(Ministry of Education), College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha 410081, P. R. China
| | - Hao Tang
- Key
Laboratory of Chemical Biology and Traditional Chinese Medicine Research
(Ministry of Education), College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha 410081, P. R. China
| | - Shouzhuo Yao
- Key
Laboratory of Chemical Biology and Traditional Chinese Medicine Research
(Ministry of Education), College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha 410081, P. R. China
- State
Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha 410082, P. R. China
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61
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Sharma R, Ragavan KV, Thakur MS, Raghavarao KSMS. Recent advances in nanoparticle based aptasensors for food contaminants. Biosens Bioelectron 2015; 74:612-27. [PMID: 26190473 DOI: 10.1016/j.bios.2015.07.017] [Citation(s) in RCA: 134] [Impact Index Per Article: 14.9] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2015] [Revised: 07/06/2015] [Accepted: 07/10/2015] [Indexed: 12/11/2022]
Abstract
Food safety and hazard analysis is a prime concern of human life, thus quality assessment of food and water is the need of the day. Recent advances in nano-biotechnology play a significant role in providing possible solutions for developing highly sensitive and affordable detection tools for food analysis. Nanomaterials based aptasensors hold great potential to overcome the drawbacks of conventional analytical techniques. Aptamers comprise a novel class of highly specific bio-recognition elements which are produced by SELEX (systematic evolution of ligands by exponential enrichment) process. They bind to target molecules by folding into 3D structures that can discriminate different chiral compounds. The flexibility in making modifications in aptamers contribute to the design of biosensors, enabling the generation of bio-recognition elements for a wide variety of target molecules. Nanomaterials such as metal nanoparticles, metal nanoclusters, metal oxide nanoparticles, metal and carbon quantum dots, graphene, carbon nanotubes and nanocomposites enable higher sensitivity by signal amplification and introduce several novel transduction principles such as enhanced chemiluminescence, fluorescence, Raman signals, electrochemical signals, enhanced catalytic activity, and super-paramagnetic properties to the biosensor. Although there are a few reviews published recently which deal with the potential of aptamers in various fields, none are devoted exclusively to the potential of aptasensors based on nanomaterials for the analysis of food contaminants. Hence, the current review discusses several transduction systems and their principles used in aptamer based nanosensors which have been developed in the past five years, the challenges faced in their designing, along with their strengths and limitations.
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Affiliation(s)
- Richa Sharma
- Department of Food Engineering, CSIR-CFTRI, India; Academy of Scientific and Innovative Research, India
| | - K V Ragavan
- Department of Food Engineering, CSIR-CFTRI, India; Academy of Scientific and Innovative Research, India
| | - M S Thakur
- Materials Science Centre, University of Mysore, Mysore 570005, Karnataka, India.
| | - K S M S Raghavarao
- Department of Food Engineering, CSIR-CFTRI, India; Academy of Scientific and Innovative Research, India.
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62
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Yang J, Tan X, Zhang X, Yang Q, Shen Y. Cu²⁺ functionalized N-acetyl-L-cysteine capped CdTe quantum dots as a novel resonance Rayleigh scattering probe for the recognition of phenylalanine enantiomers. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2015; 151:591-597. [PMID: 26163781 DOI: 10.1016/j.saa.2015.07.012] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/26/2015] [Revised: 06/27/2015] [Accepted: 07/01/2015] [Indexed: 06/04/2023]
Abstract
A simple protocol that can be used to simultaneously determinate enantiomers is extremely intriguing and useful. In this study, we proposed a low-cost, facile, sensitive method for simultaneous determination. The molecular recognition of Cu(2+) functionalized N-acetyl-l-cysteine capped CdTe quantum dots (Cu(2+)-NALC/CdTe QDs) with phenylalanine (PA) enantiomers was investigated based on the resonance Rayleigh scattering (RRS) spectral technique. The RRS intensity of NALC/CdTe QDs is very weak, but Cu(2+) functionalized NALC/CdTe QDs have extremely high RRS intensity, the most important observations are that PA could quench the RRS intensity of Cu(2+)-NALC/CdTe QDs, and that l-PA and d-PA have different degree of influence. In addition, those experimental factors such as acidity, concentration of Cu(2+) and reaction time were investigated in regards to their effects on enantioselective interaction. Finally, the applicability of the chiral recognized sensor for the analysis of chiral mixtures on enantiomers has been demonstrated, and the results that were obtained high precision (<4.63%) and low error (<3.06%).
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Affiliation(s)
- Jidong Yang
- School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China; School of Chemistry and Environmental Engineering, Chongqing Three Gorges University, Wanzhou, Chongqing 404000, China.
| | - Xuanping Tan
- School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China
| | - Xiaoning Zhang
- Department of Mathematics, Sciences & Technology, Paine College, 1235 Fifteenth Street, Augusta, GA 30901, United Sates
| | - Qiong Yang
- School of Chemistry and Chemical Engineering, Yangtze Normal University, Chongqing, Fuling 408100, China
| | - Yizhong Shen
- School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China
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63
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Liu B, Liu J. DNA adsorption by magnetic iron oxide nanoparticles and its application for arsenate detection. Chem Commun (Camb) 2015; 50:8568-70. [PMID: 24956061 DOI: 10.1039/c4cc03264k] [Citation(s) in RCA: 95] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Iron oxide nanoparticles adsorb fluorescently labeled DNA oligonucleotides via the backbone phosphate and quench fluorescence. Arsenate displaces adsorbed DNA to increase fluorescence, allowing detection of arsenate down to 300 nM. This is a new way of using DNA: analyte recognition relies on its phosphate instead of the bases.
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Affiliation(s)
- Biwu Liu
- Department of Chemistry, Waterloo Institute for Nanotechnology, University of Waterloo, Waterloo, Ontario N2L 3G1, Canada.
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64
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Wu Y, Zhan S, Wang L, Zhou P. Selection of a DNA aptamer for cadmium detection based on cationic polymer mediated aggregation of gold nanoparticles. Analyst 2015; 139:1550-61. [PMID: 24496116 DOI: 10.1039/c3an02117c] [Citation(s) in RCA: 120] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The demand for selection of aptamers against various small chemical molecules has substantially increased in recent years. To incubate and separate target-specific aptamers, the conventional SELEX procedures generally need to immobilize target molecules on a matrix, which may be impotent to screen aptamers toward small molecules without enough sites for immobilization. Herein we chose Cd(II) as a model of a small molecule with less sites, and proposed a novel SELEX strategy of immobilizing ssDNA libraries rather than target molecules on a matrix, for selection of aptamers with high affinity to Cd(II). After eleven rounds of positive and negative selection, twelve T and G-rich of nonrepeating ssDNA sequences were identified, of which the Cd-4 aptamer displayed the highest binding affinity to Cd(II). The secondary structures of these sequences revealed that a stem-loop structure folded by the domain of their 30-random sequence is critical for aptamers to bind targets. Then the interaction between the selected Cd-4 aptamer and Cd(II) was confirmed by CD analysis, and the binding specificity toward other competitive metal ions was also investigated. The dissociation constant (Kd) of Cd-4 aptamer was determined as 34.5 nM for Cd(II). Moreover, the Cd-4 aptamer was considered a recognition element for the colorimetric detection of Cd(II) based on the aggregation of AuNPs by cationic polymer. Through spectroscopic quantitative analysis, Cd(II) in aqueous solution can be detected as low as 4.6 nM. The selected Cd-4 aptamer will offer a new substitute for the detection of Cd(II) or other applications like recovery of cadmium from polluted samples.
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Affiliation(s)
- Yuangen Wu
- Key Laboratory of Urban Agriculture (South), Ministry of Agriculture, School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, P. R. China.
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65
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Tang M, Wen G, Luo Y, Liang A, Jiang Z. A simple resonance Rayleigh scattering method for determination of trace CA125 using immuno-AuRu nanoalloy as probe via ultrasonic irradiation. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2015; 135:1032-1038. [PMID: 25173519 DOI: 10.1016/j.saa.2014.07.066] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/06/2014] [Revised: 07/13/2014] [Accepted: 07/23/2014] [Indexed: 06/03/2023]
Abstract
AuRu nanoalloy (GR) with Au/Ru molar ratio of 32/1 was prepared by the sodium borohydride reduction method. It was used to label the CA125 antibody (Ab) to obtain an immunonanoprobe (GRAb) for cancer antigen 125 (CA125). In pH 7.0 citric acid-Na2HPO4 buffer solution and irradiation of ultrasound, the probes were aggregated nonspecifically to big clusters that showed a strong resonance Rayleigh scattering (RRS) peak at 278 nm. Upon addition of CA125, GRAb reacted specifically with CA125 to form dispersive immunocomplexes of CA125-GRAb in the solution and this process enhanced by the ultrasonic cavitation effect, which led to the RRS intensity decreased greatly. The decreased RRS intensity was linear to the concentration of CA125 in the range of 1.3-80 U/mL, with a detection limit of 0.6 U/mL. The proposed method was applied to detect CA125 in real sample, with satisfactory results.
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Affiliation(s)
- Meiling Tang
- Key Laboratory of Ecology of Rare and Endangered Species and Environmental Conservation of Education Ministry, Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Guangxi Normal University, Guilin 541004, China
| | - Guiqing Wen
- Key Laboratory of Ecology of Rare and Endangered Species and Environmental Conservation of Education Ministry, Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Guangxi Normal University, Guilin 541004, China
| | - Yanghe Luo
- Key Laboratory of Ecology of Rare and Endangered Species and Environmental Conservation of Education Ministry, Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Guangxi Normal University, Guilin 541004, China
| | - Aihui Liang
- Key Laboratory of Ecology of Rare and Endangered Species and Environmental Conservation of Education Ministry, Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Guangxi Normal University, Guilin 541004, China
| | - Zhiliang Jiang
- Key Laboratory of Ecology of Rare and Endangered Species and Environmental Conservation of Education Ministry, Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Guangxi Normal University, Guilin 541004, China.
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66
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Jiang C, Chen C, Lu Z, Liu Q, Tang M, Liang A, Jiang Z. A nanogold resonance Rayleigh scattering method for determination of trace As based on the hydride nanoreaction. LUMINESCENCE 2015; 30:847-52. [PMID: 25582819 DOI: 10.1002/bio.2831] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2014] [Revised: 09/30/2014] [Accepted: 11/19/2014] [Indexed: 11/12/2022]
Abstract
In H2 SO4 solution, As(III) was reduced to arsine (AsH3 ) by NaBH4 , and was absorbed in HAuCl4 solution to form nanogold particles (NGs) that exhibited a resonance Rayleigh scattering (RRS) effect at 370 nm. Under the selected conditions, when the As(III) concentration increased the RRS peak also increased due to the formation of more NGs. There was a linear correlation between RRS intensity and As(III) concentration in the range 6-1000 ng/mL, with a detection limit of 3 ng/mL. This new hydride generation-nanogold reaction RRS (HG-NG RRS) method was applied to determine trace amounts of As in milk samples, with satisfactory results.
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Affiliation(s)
- Caina Jiang
- Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection of Ministry Education, China
| | - Chunqiang Chen
- Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection of Ministry Education, China
| | - Zujun Lu
- Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection of Ministry Education, China
| | - Qingye Liu
- Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection of Ministry Education, China
| | - Meiling Tang
- Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection of Ministry Education, China
| | - Aihui Liang
- Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection of Ministry Education, China
| | - Zhiliang Jiang
- Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Guangxi Normal University, Guilin, 541004, China
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67
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Tang G, Wang J, Li Y, Su X. Determination of arsenic(iii) based on the fluorescence resonance energy transfer between CdTe QDs and Rhodamine 6G. RSC Adv 2015. [DOI: 10.1039/c4ra16789a] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The schematic illustration for the As(iii) detection based on fret between CdTe QDs and Rhodamine 6G.
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Affiliation(s)
- Guangchao Tang
- Department of Analytical Chemistry
- College of Chemistry
- Jilin University
- Changchun
- China
| | - Jilin Wang
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry
- College of Chemistry
- Jilin University
- Changchun
- China
| | - Yang Li
- Department of Analytical Chemistry
- College of Chemistry
- Jilin University
- Changchun
- China
| | - Xingguang Su
- Department of Analytical Chemistry
- College of Chemistry
- Jilin University
- Changchun
- China
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68
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Thatai S, Khurana P, Boken J, Prasad S, Kumar D. Nanoparticles and core–shell nanocomposite based new generation water remediation materials and analytical techniques: A review. Microchem J 2014. [DOI: 10.1016/j.microc.2014.04.001] [Citation(s) in RCA: 65] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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69
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Kaur H, Kumar R, Babu JN, Mittal S. Advances in arsenic biosensor development--a comprehensive review. Biosens Bioelectron 2014; 63:533-545. [PMID: 25150780 DOI: 10.1016/j.bios.2014.08.003] [Citation(s) in RCA: 92] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2014] [Revised: 07/21/2014] [Accepted: 08/04/2014] [Indexed: 01/23/2023]
Abstract
Biosensors are analytical devices having high sensitivity, portability, small sample requirement and ease of use for qualitative and quantitative monitoring of various analytes of human importance. Arsenic (As), owing to its widespread presence in nature and high toxicity to living creatures, requires frequent determination in water, soil, agricultural and food samples. The present review is an effort to highlight the various advancements made so far in the development of arsenic biosensors based either on recombinant whole cells or on certain arsenic-binding oligonucleotides or proteins. The role of futuristic approaches like surface plasmon resonance (SPR) and aptamer technology has also been discussed. The biomethods employed and their general mechanisms, advantages and limitations in relevance to arsenic biosensors developed so far are intended to be discussed in this review.
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Affiliation(s)
- Hardeep Kaur
- Centre for Environmental Science and Technology, Central University of Punjab, Bathinda, Punjab 151001, India.
| | - Rabindra Kumar
- Centre for Environmental Science and Technology, Central University of Punjab, Bathinda, Punjab 151001, India.
| | - J Nagendra Babu
- Centre for Environmental Science and Technology, Central University of Punjab, Bathinda, Punjab 151001, India.
| | - Sunil Mittal
- Centre for Environmental Science and Technology, Central University of Punjab, Bathinda, Punjab 151001, India.
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70
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Ye L, Wen G, Dong J, Luo Y, Liu Q, Liang A, Jiang Z. A simple label-free rhodamine 6G SERS probe for quantitative analysis of trace As3+in an aptamer–nanosol. RSC Adv 2014. [DOI: 10.1039/c4ra04416a] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
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71
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A new silver nanorod SPR probe for detection of trace benzoyl peroxide. Sci Rep 2014; 4:5323. [PMID: 24937042 PMCID: PMC4060507 DOI: 10.1038/srep05323] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2014] [Accepted: 05/27/2014] [Indexed: 12/18/2022] Open
Abstract
The stable silver nanorod (AgNR) sol in red was prepared by the two-step procedure of NaBH4-H2O2 and citrate heating reduction. The AgNR had a transverse and a longitudinal surface plasmon resonance (SPR) absorption peak at 338 nm and 480 nm. Meanwhile, two transverse and longitudinal SPR Rayleigh scattering (SPR-RS) peaks at 340 nm and 500 nm were observed firstly using common fluorescence spectrometer. The SPR absorption, RS, surface enhanced Raman scattering (SERS) and electron microscope technology were used to study the formation mechanism of red silver nanorods and the SERS enhancement mechanism of nano-aggregation. The AgNR-BPO SPR absorption and AgNR-NaCl-BPO SPR-RS analytical systems were studied to develop two new simple, rapid, and low-cost SPR methods for the detection of trace BPO.
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72
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73
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Weng CI, Cang JS, Chang JY, Hsiung TM, Unnikrishnan B, Hung YL, Tseng YT, Li YJ, Shen YW, Huang CC. Detection of Arsenic(III) through Pulsed Laser-Induced Desorption/Ionization of Gold Nanoparticles on Cellulose Membranes. Anal Chem 2014; 86:3167-73. [DOI: 10.1021/ac500053e] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Cheng-I Weng
- Institute
of Bioscience and Biotechnology, National Taiwan Ocean University, Keelung, 20224, Taiwan
| | - Jin-Shun Cang
- Department
of Chemistry, Yancheng Institute of Industry Technology, Yancheng, Jiangsu 224005, P. R. China
| | - Jia-Yaw Chang
- Department
of Chemical Engineering, National Taiwan University of Science and Technology, Taipei, 10607, Taiwan
| | - Tung-Ming Hsiung
- Institute
of Bioscience and Biotechnology, National Taiwan Ocean University, Keelung, 20224, Taiwan
| | - Binesh Unnikrishnan
- Institute
of Bioscience and Biotechnology, National Taiwan Ocean University, Keelung, 20224, Taiwan
| | - Yu-Lun Hung
- Institute
of Bioscience and Biotechnology, National Taiwan Ocean University, Keelung, 20224, Taiwan
| | - Yu-Ting Tseng
- Institute
of Bioscience and Biotechnology, National Taiwan Ocean University, Keelung, 20224, Taiwan
| | - Yu-Jia Li
- Institute
of Bioscience and Biotechnology, National Taiwan Ocean University, Keelung, 20224, Taiwan
| | - Yu-Wei Shen
- Institute
of Bioscience and Biotechnology, National Taiwan Ocean University, Keelung, 20224, Taiwan
| | - Chih-Ching Huang
- Institute
of Bioscience and Biotechnology, National Taiwan Ocean University, Keelung, 20224, Taiwan
- Center
of Excellence for the Oceans, National Taiwan Ocean University, Keelung, 20224, Taiwan
- School of
Pharmacy, College of Pharmacy, Kaohsiung Medical University, Kaohsiung, 80708, Taiwan
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74
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Wen G, Luo Y, Liang A, Jiang Z. Autocatalytic oxidization of nanosilver and its application to spectral analysis. Sci Rep 2014; 4:3990. [PMID: 24496486 PMCID: PMC3913915 DOI: 10.1038/srep03990] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2013] [Accepted: 01/20/2014] [Indexed: 11/30/2022] Open
Abstract
The stable yellow nanosilver (AgNP) and blue nanosilver (AgNPB) sols were prepared by the NaBH4 procedure. The new nanocatalytic reaction of AgNP-NaCl-H2O2 was investigated by surface plasmon resonance (SPR) absorption, resonance Rayleigh scattering (RRS), surface-enhanced Raman scattering (SERS) and scanning electron microscope (SEM) techniques. The autocatalytic oxidization of Ag on AgNP surface by H2O2 was observed firstly and the AgNP/AgCl nanoparticles were characterized. The [Ag+] from AgNP is different to the Ag+ from AgNO3 that adsorb on the AgNP surface. An autocatalytic oxidization mechanism was proposed to explain experimental phenomena. The relationship between the SPR absorption peaks and the RRS peaks of AgNPB was studied, and three characteristic RRS peaks called as out-of-plane quadrupole, out-of-plane dipole and in-plane dipole RRS peaks were observed firstly. Using AgNP as nanoprobe, a simple, sensitive and selective RRS method was developed for assay of H2O2 in the range of 2.0 × 10−8-8.0 × 10−5 mol/L.
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Affiliation(s)
- Guiqing Wen
- Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection of Ministry Education, Guangxi Normal University, Guilin 541004, China
| | - Yanghe Luo
- Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection of Ministry Education, Guangxi Normal University, Guilin 541004, China
| | - Aihui Liang
- Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection of Ministry Education, Guangxi Normal University, Guilin 541004, China
| | - Zhiliang Jiang
- Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection of Ministry Education, Guangxi Normal University, Guilin 541004, China
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75
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Chen M, Cai HH, Yang F, Lin D, Yang PH, Cai J. Highly sensitive detection of chromium (III) ions by resonance Rayleigh scattering enhanced by gold nanoparticles. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2014; 118:776-781. [PMID: 24144831 DOI: 10.1016/j.saa.2013.09.058] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/21/2013] [Revised: 09/03/2013] [Accepted: 09/16/2013] [Indexed: 06/02/2023]
Abstract
Simple and sensitive determination of chromium (III) ions (Cr(3+)) has potential applications for detecting trace contamination in environment. Here, the assay is based on the enhancement of resonance Rayleigh scattering (RRS) by Cr(3+)-induced aggregation of citrate-capped gold nanoparticles (AuNPs). Transmission electron microscopy (TEM) and UV-vis absorption spectroscopy were employed to characterize the nanostructures and spectroscopic properties of the Cr(3+)-AuNP system. The experiment conditions, such as reaction time, pH value, salt concentration and interfering ions, were investigated. The combination of signal amplification of Cr(3+)-citrate chelation with high sensitivity of RRS technique allow a selective assay of Cr(3+) ions with a detection limit of up to 1.0 pM. The overall assay can be carried out at room temperature within only twenty minutes, making it suitable for high-throughput routine applications in environment and food samples.
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Affiliation(s)
- Min Chen
- Department of Pulmonary Medicine, The First Affiliated Hospital of Jinan University, Guangzhou 510630, China; Institute of Respiratory Diseases, Guangdong Medical College, Zhanjiang 524001, China
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76
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Liu Q, Dong J, Luo Y, Wen G, Wei L, Liang A, Jiang Z. A highly sensitive SERS method for the determination of nitrogen oxide in air based on the signal amplification effect of nitrite catalyzing the bromate oxidization of a rhodamine 6G probe. RSC Adv 2014. [DOI: 10.1039/c3ra47279e] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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77
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Huang YQ, Cai PY, Liu JM, Ma XD, Huang QT, Jiao L, Zheng ZY, Huang LZ. Ultra-sensitive phosphorescence sensor for the detection of trace As(v) based on the signal amplification effect of As(v) catalyzing H2O2 oxidize CdTe-Cys-quantum dots. RSC Adv 2014. [DOI: 10.1039/c3ra45192e] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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78
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Yu M. Colorimetric Detection of Trace Arsenic(III) in Aqueous Solution Using Arsenic Aptamer and Gold Nanoparticles. Aust J Chem 2014. [DOI: 10.1071/ch13512] [Citation(s) in RCA: 68] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
In this study, trace arsenic(iii) (AsIII) in aqueous solution was detected by applying a classical aptamer-based gold nanoparticles colorimetric sensing strategy. An arsenic aptamer was used as a sensing probe and gold nanoparticles as a colorimetric indicator. In the absence of AsIII, the gold nanoparticles were stabilised by the arsenic aptamer and remained dispersed at high NaCl concentrations, displaying a red solution. Contrarily, in the presence of AsIII, the gold nanoparticles were prone to aggregation, owing to the formation of aptamer–AsIII complex between the arsenic aptamer and AsIII, and thus exhibited a blue solution. By monitoring the colour change, a simple and fast colorimetric assay for AsIII was established with a detection range of 1.26–200 ppb and a detection limit of 1.26 ppb. Because this colorimetric assay only involves common reagents and can be assessed visually, it holds great potential for arsenic(iii) monitoring in environment-related and other applications.
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79
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Yan S, Zhang L, Tang Y, Lv Y. Synthesis of water-soluble Ag2Se QDs as a novel resonance Rayleigh scattering sensor for highly sensitive and selective ConA detection. Analyst 2014; 139:4210-5. [DOI: 10.1039/c4an00579a] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Schematic illustration for fabricating TGA and glycine modified Ag2Se QDs for RRS detection of ConA.
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Affiliation(s)
- Shuguang Yan
- Key Laboratory of Green Chemistry & Technology
- Ministry of Education
- College of Chemistry
- Sichuan University
- Chengdu, China
| | - Lichun Zhang
- Key Laboratory of Green Chemistry & Technology
- Ministry of Education
- College of Chemistry
- Sichuan University
- Chengdu, China
| | - Yurong Tang
- Key Laboratory of Green Chemistry & Technology
- Ministry of Education
- College of Chemistry
- Sichuan University
- Chengdu, China
| | - Yi Lv
- Key Laboratory of Green Chemistry & Technology
- Ministry of Education
- College of Chemistry
- Sichuan University
- Chengdu, China
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80
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Kong L, Liu Z, Liu S, Wu L, Tian F. Direct determination of polymyxin B sulfate using resonance Rayleigh scattering and resonance non-linear scattering methods with hexatungstate. LUMINESCENCE 2013; 29:29-35. [PMID: 23299991 DOI: 10.1002/bio.2471] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2012] [Revised: 10/24/2012] [Accepted: 11/23/2012] [Indexed: 11/06/2022]
Abstract
At pH 1.3-1.6, tungstate WO4(2-) , can be converted to hexatungstate W6 O19(2-) , which can react with positively charged polymyxin B sulfate (PMB) to result in enhancement of resonance Rayleigh scattering (RRS) and resonance non-linear scattering, including second order scattering and frequency doubling scattering. Linear relationships can be established between enhanced scattering intensity and PMB concentration. The detection limits (3σ) were 5.5 ng/mL (RRS), 10.1 ng/mL (second order scattering) and 34.6 ng/mL (frequency doubling scattering). The optimum reaction conditions, influencing factors and related analytical properties were tested. The interaction mechanism was investigated via absorption spectrum, circular dichroism spectra and atomic force microscopy imaging. The basis of scattering enhancement is discussed. PMB in eardrops, human serum and urine, were quantified satisfactorily by RRS.
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Affiliation(s)
- Ling Kong
- School of Chemistry, Chemical Engineering, Key Laboratory of Luminescence, Real-time Analysis of the Ministry of Education, Southwest University, Chongqing, China
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81
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Xing H, Zhan S, Wu Y, He L, Zhou P. Sensitive colorimetric detection of melamine in milk with an aptamer-modified nanogold probe. RSC Adv 2013. [DOI: 10.1039/c3ra42138d] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
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82
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Zhan S, Wu Y, Liu L, Xing H, He L, Zhan X, Luo Y, Zhou P. A simple fluorescent assay for lead(ii) detection based on lead(ii)-stabilized G-quadruplex formation. RSC Adv 2013. [DOI: 10.1039/c3ra42621a] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
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