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An Enzymatic Reaction Modulated Fluorescence-on Omethoate Biosensor Based on Fe3O4@GO and Copper Nanoparticles. JOURNAL OF ANALYSIS AND TESTING 2022. [DOI: 10.1007/s41664-022-00210-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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2
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Sun Y, Wei J, Zou J, Cheng Z, Huang Z, Gu L, Zhong Z, Li S, Wang Y, Li P. Electrochemical detection of methyl-paraoxon based on bifunctional cerium oxide nanozyme with catalytic activity and signal amplification effect. J Pharm Anal 2021; 11:653-660. [PMID: 34765279 PMCID: PMC8572677 DOI: 10.1016/j.jpha.2020.09.002] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2020] [Revised: 09/03/2020] [Accepted: 09/03/2020] [Indexed: 11/29/2022] Open
Abstract
A new electrochemical sensor for organophosphate pesticide (methyl-paraoxon) detection based on bifunctional cerium oxide (CeO2) nanozyme is here reported for the first time. Methyl-paraoxon was degraded into p-nitrophenol by using CeO2 with phosphatase mimicking activity. The CeO2 nanozyme-modified electrode was then synthesized to detect p-nitrophenol. Cyclic voltammetry was applied to investigate the electrochemical behavior of the modified electrode, which indicates that the signal enhancement effect may attribute to the coating of CeO2 nanozyme. The current research also studied and discussed the main parameters affecting the analytical signal, including accumulation potential, accumulation time, and pH. Under the optimum conditions, the present method provided a wider linear range from 0.1 to 100 μmol/L for methyl-paraoxon with a detection limit of 0.06 μmol/L. To validate the proof of concept, the electrochemical sensor was then successfully applied for the determination of methyl-paraoxon in three herb samples, i.e., Coix lacryma-jobi, Adenophora stricta and Semen nelumbinis. Our findings may provide new insights into the application of bifunctional nanozyme in electrochemical detection of organophosphorus pesticide. A new electrochemical method for methyl-paraoxon detection by using bifunctional nanozyme was presented. The cerium oxide nanozyme modified glassy carbon electrode was prepared to improve the sensitivity. The developed method has been successfully applied in three herbal plant samples.
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Affiliation(s)
- Yuzhou Sun
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macau, 999078, China
| | - Jinchao Wei
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macau, 999078, China.,Institute of Traditional Chinese Medicine & Natural Products, College of Pharmacy, Jinan University; Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research, Guangzhou, 510632, China
| | - Jian Zou
- Institute of Traditional Chinese Medicine & Natural Products, College of Pharmacy, Jinan University; Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research, Guangzhou, 510632, China.,Integrated Chinese and Western Medicine Postdoctoral Research Station, Jinan University, Guangzhou, 510632, China
| | - Zehua Cheng
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macau, 999078, China
| | - Zhongming Huang
- Center of Super-Diamond and Advanced Films (COSDAF) and Department of Chemistry, City University of Hong Kong, Hong Kong, 999077, China
| | - Liqiang Gu
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macau, 999078, China
| | - Zhangfeng Zhong
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macau, 999078, China
| | - Shengliang Li
- Center of Super-Diamond and Advanced Films (COSDAF) and Department of Chemistry, City University of Hong Kong, Hong Kong, 999077, China
| | - Yitao Wang
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macau, 999078, China
| | - Peng Li
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macau, 999078, China
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3
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Bhattu M, Verma M, Kathuria D. Recent advancements in the detection of organophosphate pesticides: a review. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2021; 13:4390-4428. [PMID: 34486591 DOI: 10.1039/d1ay01186c] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Organophosphorus pesticides (OPPs) are generally utilized for the protection of crops from pests. Because the use of OPPs in various agricultural operations has expanded dramatically, precise monitoring of their concentration levels has become the critical issue, which will help in the protection of ecological systems and food supply. However, the World Health Organization (WHO) has classified them as extremely dangerous chemical compounds. Taking their immense use and toxicity into consideration, the development of easy, rapid and highly sensitive techniques is necessary. Despite the fact that there are numerous conventional ways for detecting OPPs, the development of portable sensors is required to make routine analysis considerably more convenient. Some of these advanced techniques include colorimetric sensors, fluorescence sensors, molecular imprinted polymer-based sensors, and surface plasmon resonance-based sensors. This review article specifically focuses on the colorimetric, fluorescence and electrochemical sensors. In this article, the sensing strategies of these developed sensors, analytical conditions and their respective limit of detection are compiled.
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Affiliation(s)
- Monika Bhattu
- Department of Chemistry, University Centre for Research and Development, Chandigarh University, Gharuan, Punjab 140413, India.
| | - Meenakshi Verma
- Department of Chemistry, University Centre for Research and Development, Chandigarh University, Gharuan, Punjab 140413, India.
| | - Deepika Kathuria
- Department of Chemistry, University Centre for Research and Development, Chandigarh University, Gharuan, Punjab 140413, India.
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4
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Zhang J, Hu H, Yang L. Ultra-highly sensitive and stable acetylcholinesterase biosensor based on TiO2-NRs and rGO. Microchem J 2021. [DOI: 10.1016/j.microc.2021.106435] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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5
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Review of recent developments (2018–2020) on acetylcholinesterase inhibition based biosensors for organophosphorus pesticides detection. Microchem J 2021. [DOI: 10.1016/j.microc.2020.105779] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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6
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Huo Z, Xia L, Li G, Xiao X. A "Polymer Template" Strategy for Carbonized Polymer Dots with Controllable Properties. Chemistry 2020; 26:14754-14764. [PMID: 32841406 DOI: 10.1002/chem.202003379] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2020] [Indexed: 01/07/2023]
Abstract
Limited avenues are available for property control of carbonized polymer dots (PDs) owing to the unsatisfactory understanding of PDs" formation. Herein, a de novo "polymer template" strategy is presented for PDs with customizable functional surface groups (FSG), size, and underlying fluorescence, with a detailed mechanism. The strategy relies on novel di-active site polymers (DASPs) prepared from alkenyl azides via [3+2] cycloaddition and guanidino hydrolysis. Benefiting from these specific reactions, the DASPs were convenient for mass production and stable for storage, and could be transformed to PDs upon addition of nucleophilic agents through nucleophilic addition and substitution at 70 °C. By regulating the types of alkenyl azides, nucleophilic agents, and reaction conditions, the as-prepare PDs could be tailored with controlled types of core, FSG, and particle size, as well as fluorescence properties of quantum yield from 8.2-55.6 %, and emission maximum from 380-500 nm. These specialties make this "polymer template" strategy a promising start for building PDs-based sensor platforms. Moreover, the strategy could further our understanding towards PDs' formation, and open up a new way to customize PDs for specific needs in the fields of analysis, catalysis, images, etc.
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Affiliation(s)
- Zhiming Huo
- School of Chemistry, Sun Yat-sen University, Guangzhou, 510275, P. R. China
| | - Ling Xia
- School of Chemistry, Sun Yat-sen University, Guangzhou, 510275, P. R. China
| | - Gongke Li
- School of Chemistry, Sun Yat-sen University, Guangzhou, 510275, P. R. China
| | - Xiaohua Xiao
- School of Chemistry, Sun Yat-sen University, Guangzhou, 510275, P. R. China
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Instrument-free and visual detection of organophosphorus pesticide using a smartphone by coupling aggregation-induced emission nanoparticle and two-dimension MnO 2 nanoflake. Biosens Bioelectron 2020; 170:112668. [PMID: 33032200 DOI: 10.1016/j.bios.2020.112668] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2020] [Revised: 09/27/2020] [Accepted: 09/29/2020] [Indexed: 12/12/2022]
Abstract
Given the importance of food safety, it is highly desirable to develop a convenient, low-cost, and practical sensor for organophosphorus pesticides (OPs) detection. Here, a fluorescent paper analytical device (FPAD) based on aggregation-induced emission (AIE) nanoparticles (PTDNPs-0.10) and two-dimension MnO2 nanoflakes (2D-MnNFs) was developed for instrument-free and naked-eye analysis of OPs. PTDNP-MnNFs composites were obtained through 2D-MnNFs and PTDNPs-0.10 by electrostatic interaction and the fluorescence emission of PTDNPs-0.10 was quenched through fluorescence resonance energy transfer (FRET). When acetylcholinesterase (AChE) was present, acetylthiocholine (ATCh) was catalytically hydrolyzed into thiocholine, which reduced MnO2 of PTDNP-MnNFs into Mn2+, subsequently blocking the FRET and enhancing the fluorescence. Upon the addition of OP, AChE activity was depressed and thus the FRET between 2D-MnNFs and PTDNPs-0.10 was not affected, resulting in a slight change in fluorescence. On the basis of the variation in fluorescence intensity, highly sensitive detection of OP was readily achieved with a detection limit of 0.027 ng/mL; on the basis of the variation in brightness of FPAD, instrument-free and visual detection of OP was realized using a smartphone with a detection limit of 0.73 ng/mL. The application of FPAD has significantly simplified the detection procedure and decreased the test cost, supplying a new approach for on-site detection of OPs.
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8
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Dong Y, Li F, Wang Y. Low-Dimension Nanomaterial-Based Sensing Matrices for Antibiotics Detection: A Mini Review. Front Chem 2020; 8:551. [PMID: 32793548 PMCID: PMC7393977 DOI: 10.3389/fchem.2020.00551] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2020] [Accepted: 05/28/2020] [Indexed: 12/28/2022] Open
Abstract
Antibiotics, a kind of secondary metabolite with antipathogen effects as well as other properties, are produced by microorganisms (including bacterium, fungi, and actinomyces) or higher animals and plants during their lives. Furthermore, as a chemical, an antibiotic can disturb the developmental functions of other living cells. Moreover, it is impossible to avoid its pervasion into all kinds of environmental media via all kinds of methods, and it thus correspondingly becomes a trigger for environmental risks. As described above, antibiotics are presently deemed as a new type of pollution, with their content in media (for example, water, or food) as the focus. Due to their special qualities, nanomaterials, the most promising sensing material, can be adopted to produce sensors with extraordinary detection performance and good stability that can be applied to detection in complicated materials. For low-dimensional (LD) nanomaterials, the quantum size effect, and dielectric confinement effect are particularly strong. Therefore, they are most commonly applied in the detection of antibiotics. This article focuses on the influence of LD nanomaterials on antibiotics detection, summarizes the application of LD nanomaterials in antibiotics detection and the theorem of sensors in all kinds of antibiotics detection, illustrates the approaches to optimizing the sensitivity of sensors, such as mixture and modification, and also discusses the trend of the application of LD nanomaterials in antibiotics detection.
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Affiliation(s)
- Yucan Dong
- State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai, China.,Shanghai Institute of Pollution Control and Ecological Security, Shanghai, China
| | - Fengting Li
- State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai, China.,Shanghai Institute of Pollution Control and Ecological Security, Shanghai, China
| | - Ying Wang
- State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai, China.,Shanghai Institute of Pollution Control and Ecological Security, Shanghai, China
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9
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Hu H, Wang B, Li Y, Wang P, Yang L. Acetylcholinesterase Sensor with Patterned Structure for Detecting Organophosphorus Pesticides Based on Titanium Dioxide Sol‐gel Carrier. ELECTROANAL 2020. [DOI: 10.1002/elan.202060027] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Huaying Hu
- Key Laboratory of Advanced Display and System Applications, Ministry of EducationShanghai University Yanchang Road 149 Shanghai 200072 China
| | - Bo Wang
- Key Laboratory of Advanced Display and System Applications, Ministry of EducationShanghai University Yanchang Road 149 Shanghai 200072 China
| | - Yiru Li
- Key Laboratory of Advanced Display and System Applications, Ministry of EducationShanghai University Yanchang Road 149 Shanghai 200072 China
| | - Pengchang Wang
- Key Laboratory of Advanced Display and System Applications, Ministry of EducationShanghai University Yanchang Road 149 Shanghai 200072 China
| | - Lianqiao Yang
- Key Laboratory of Advanced Display and System Applications, Ministry of EducationShanghai University Yanchang Road 149 Shanghai 200072 China
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10
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Zhang Y, Chen X. Nanotechnology and nanomaterial-based no-wash electrochemical biosensors: from design to application. NANOSCALE 2019; 11:19105-19118. [PMID: 31549117 DOI: 10.1039/c9nr05696c] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Nanotechnology and nanomaterial based electrochemical biosensors (ECBs) have achieved great development in many fields, such as clinical diagnosis, food analysis, and environmental monitoring. Nowadays, the single-handed pursuit of sensitivity and accuracy cannot meet the demands of detection in many in situ and point-of-care (POC) circumstances. More and more attention has been focused on simplifying the operation procedure and reducing detection time, and thus no-wash assay has become one of the most effective ways for the continuous development of ECBs. However, there are many challenges to realize no-wash detection in the real analysis, such as redox interferences, multiple impurities, non-conducting protein macromolecules, etc. Furthermore, the complex detection circumstance in different application fields makes the realization of no-wash ECBs more complicated and difficult. Thanks to the updated nanotechnology and nanomaterials, in-depth analysis of the obstacles in the detection process and various methods for fabricating no-wash ECBs, most issues have been largely resolved. In this review, we have systematically analyzed the nanomaterial based design strategy of the state-of-the-art no-wash ECBs in the past few years. Following that, we summarized the challenges in the detection process of no-wash ECBs and their applications in different fields. Finally, based on the summary and analysis in this review, we also evaluated and discussed future prospects from the design to the application of ECBs.
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Affiliation(s)
- Yong Zhang
- Key Laboratory of Interfacial Reaction & Sensing Analysis in Universities of Shandong, School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, PR China. and Laboratory of Molecular Imaging and Nanomedicine (LOMIN), National Institute of Biomedical Imaging and Bioengineering (NIBIB), National Institutes of Health (NIH), Bethesda, Maryland 20892, USA.
| | - Xiaoyuan Chen
- Laboratory of Molecular Imaging and Nanomedicine (LOMIN), National Institute of Biomedical Imaging and Bioengineering (NIBIB), National Institutes of Health (NIH), Bethesda, Maryland 20892, USA.
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11
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Mahmoudi E, Fakhri H, Hajian A, Afkhami A, Bagheri H. High-performance electrochemical enzyme sensor for organophosphate pesticide detection using modified metal-organic framework sensing platforms. Bioelectrochemistry 2019; 130:107348. [PMID: 31437810 DOI: 10.1016/j.bioelechem.2019.107348] [Citation(s) in RCA: 47] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2019] [Revised: 08/07/2019] [Accepted: 08/08/2019] [Indexed: 10/26/2022]
Abstract
A practical electrochemical biosensor with high sensitivity was developed for detecting organophosphorus (OP). Initially, Ce metal was introduced into an UiO-66-template to form Ce/UiO-66. Later, graphene oxide (GO), carbon black (CB) and multi-walled carbon nanotubes (MWCNTs) were separately added to Ce/UiO-66 to compare the effect of different carbon-based material types on the performance of the biosensor. Exclusively, Ce/UiO-66/MWCNTs with a Ce (7%) and MWCNT (30%) matrix was found to not only load more acetylcholinesterase (AChE) onto vacant sites but also increase electron transfer and decrease the number of diffusion pathways between the thiocholine and electrode surface. Moreover, the appropriate oxophilicity of Ce coupled with the high surface area and good conductivity of MWCNTs in the UiO-66 structure revealed a high affinity to acetylthiocholine chloride (ATCl) and possible catalysis of the hydrolysis of ATCl with a Michaelis-Menten constant of 0.258 mM. This biosensor, under optimal conditions, demonstrated a rapid and sensitive detection of paraoxon over a wide linear range of 0.01-150 nM, with a low detection limit of 0.004 nM. As a result, the AChE/Ce/UiO-66/MWCNTs/GCE biosensor can be employed in laboratory and field experiments to determine paraoxon levels.
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Affiliation(s)
- Ehsan Mahmoudi
- Chemical Injuries Research Center, Systems Biology and Poisonings Institute, Baqiyatallah University of Medical Sciences, Tehran, Iran
| | - Hanieh Fakhri
- Chemical Injuries Research Center, Systems Biology and Poisonings Institute, Baqiyatallah University of Medical Sciences, Tehran, Iran
| | - Ali Hajian
- Institute of Sensor and Actuatwor Systems, TU Wien, 1040 Vienna, Austria
| | - Abbas Afkhami
- Faculty of Chemistry, Bu-Ali Sina University, Hamedan, Iran
| | - Hasan Bagheri
- Chemical Injuries Research Center, Systems Biology and Poisonings Institute, Baqiyatallah University of Medical Sciences, Tehran, Iran.
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Organosilane-functionalized carbon quantum dots and their applications to "on-off-on" fluorometric determination of chromate and ascorbic acid, and in white light-emitting devices. Mikrochim Acta 2019; 186:516. [PMID: 31280375 DOI: 10.1007/s00604-019-3603-6] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2019] [Accepted: 06/12/2019] [Indexed: 02/02/2023]
Abstract
Organosilane-functionalized carbon quantum dots (Si-CQDs) were synthesized by reacting glucosamine and 3-[2-(2-aminoethylamino)ethylamino]propyl-trimethoxysilane in acetone. The surface morphology, crystal structure, functional groups, elemental composition, and optical properties of the Si-CQDs were characterized using TEM (HRTEM), XRD, FT-IR, XPS, UV-vis absorption and fluorescence spectroscopy. They show that N-containing groups including C=N and C-N, and Si-containing groups including Si-O-C and Si-O-Si have been formed on the surface of Si-CQDs. The element doping and surface functionalization of Si-CQDs endow their novel chemical, physical and optical properties. The Si-CQDs dispersed in acetone are almost monodisperse with an average particle diameter of 3.6 nm. The Si-CQDs dispersed in acetone display blue fluorescence (excitation/emission maxima of 380/460 nm). In contrast, the solid-state Si-CQDs exhibited yellow fluorescence (with excitation/emission maxima of 470/595 nm). The fluorescence emission spectra of acetone-suspended Si-CQDs are concentration-dependent, and the emission peak becomes red-shifted as the concentration is increased. The Si-CQDs are sensitive and selective fluorescent "on off on" nanoprobes for chromate [Cr(VI)] and ascorbic acid (AA). Fluorescence is quenched by Cr(VI) via an inner filter effect from the absorption of Si-CQDs excitation at 380 nm by Cr(VI). Upon addition of AA, fluorescence is restored because of reduction of Cr(VI) by AA. Under optimal conditions (excitation/emission wavelength of 380/460 nm), the response is linear in the 0.4-160 μM Cr(VI) concentration range, and the detection limit is 34 nM. The respective data for AA are 1-80 μM and 84.6 nM. The practical use of the nanoprobe for Cr(VI) determination in real river water samples is also demonstrated successfully. Their concentration-dependent fluorescence, good thermal stability and self-crosslinking behavior also make the Si-CQDs a candidate material for white light-emitting diodes that displays color conversion and can act as an encapsulation layer in a blue light-emitting diode (LED) chip. Graphical abstract One-pot solvothermal synthesis of organosilane-functionalized carbon quantum dots (Si-CQDs) with blue fluorescence in solution, yellow fluorescence in solid state and concentration-dependent fluorescence property, and their applications for chromate (Cr(VI)) and ascorbic acid dual determinations and white light-emitting device. Graphical Abstract contains poor quality and small text inside the artwork. Please do not re-use the file that we have rejected or attempt to increase its resolution and re-save. It is originally poor, therefore, increasing the resolution will not solve the quality problem. We suggest that you provide us the original format. We prefer replacement figures containing vector/editable objects rather than embedded images. Preferred file formats are eps, ai, tiff and pdf.We have changed the poor quality graphical abstract into the jpg and pdf.
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Deng Z, Liu C, Jin Y, Pu J, Wang B, Chen J. High quantum yield blue- and orange-emitting carbon dots: one-step microwave synthesis and applications as fluorescent films and in fingerprint and cellular imaging. Analyst 2019; 144:4569-4574. [PMID: 31225569 DOI: 10.1039/c9an00672a] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
A high quantum yield (QY) is the key requirement for implementing carbon dots (CDs) in nearly all applications. In this work, blue emissive N-doped CDs with a QY of 83% and orange emissive N-doped CDs with a QY of 47% were successfully prepared using resorcinol and phloroglucin as carbon resources in formamide by one-step microwave synthesis, respectively. Formamide not only plays a role as the solvent but also takes part in the formation of the high QY CDs. It is demonstrated that the as-prepared blue- and orange-emitting N-doped CDs with a high QY can be uniformly dispersed into glue and be fabricated as CD/glue fluorescent composites for fluorescent films and fingerprint imaging. Furthermore, these CDs also show excellent cellular imaging capability.
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Affiliation(s)
- Zhiqin Deng
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, Faculty of Materials and Energy, Southwest University, Chongqing 400715, China.
| | - Chang Liu
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, Faculty of Materials and Energy, Southwest University, Chongqing 400715, China.
| | - Yanzi Jin
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, Faculty of Materials and Energy, Southwest University, Chongqing 400715, China.
| | - Jianlin Pu
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, Faculty of Materials and Energy, Southwest University, Chongqing 400715, China.
| | - Bin Wang
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, Faculty of Materials and Energy, Southwest University, Chongqing 400715, China.
| | - Jiucun Chen
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, Faculty of Materials and Energy, Southwest University, Chongqing 400715, China. and Chongqing Engineering Research Centre for Micro-Nano Biomedical Materials and Devices, Chongqing 400715, China
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14
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Mao L, Wang X, Guo Y, Yao L, Xue X, Wang HX, Xiong C, Wen W, Zhang X, Wang S. A synergistic approach to enhance the photoelectrochemical performance of carbon dots for molecular imprinting sensors. NANOSCALE 2019; 11:7885-7892. [PMID: 30964496 DOI: 10.1039/c9nr01675a] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Nanoscale carbon dots (CDs) have drawn increasing attention in photoelectrochemical (PEC) sensors for biotoxin detection owing to their many merits including excellent optical, electric and photoelectric properties. In this work, a novel strategy is proposed to improve the photoelectrical response performance of CDs by taking advantage of the synergistic effect of nitrogen and sulfur co-doping and copper phthalocyanine non-covalent functionalization approaches, which rightly adjusts the energy level of CDs, optimization of intimate interfacial contact, extension of the light absorption range, and enhancement of charge-transfer efficiency. This work demonstrates that heteroatom doping and chemical functionalization can endow CDs with various new and improved physicochemical, optical, and structural performances. This synergy contributes enormously to the molecular imprinting photoelectrochemical (MIP-PEC) sensor for toxin detection, and the work typically provided a wide linear range of 0.01 to 1000 ng mL-1 with a detection limit of 0.51 pg mL-1 for ochratoxin A (OTA).
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Affiliation(s)
- Lebao Mao
- Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Ministry-of-Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules & College of Chemistry and Chemical Engineering, Hubei University, Wuhan, Hubei 430062, PR China.
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15
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Korram J, Dewangan L, Nagwanshi R, Karbhal I, Ghosh KK, Satnami ML. A carbon quantum dot–gold nanoparticle system as a probe for the inhibition and reactivation of acetylcholinesterase: detection of pesticides. NEW J CHEM 2019. [DOI: 10.1039/c9nj00555b] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this work, fluorescence (FL) quenching (turn-off) and recovery (turn-on) of carbon quantum dots (CQDs) in the presence of dispersed and aggregated gold nanoparticles (AuNPs) was used as a probe for monitoring the inhibition and reactivation of acetylcholinesterase (AChE).
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Affiliation(s)
- Jyoti Korram
- School of Studies in Chemistry
- Pt. Ravishankar Shukla University
- Raipur
- India
| | - Lakshita Dewangan
- School of Studies in Chemistry
- Pt. Ravishankar Shukla University
- Raipur
- India
| | - Rekha Nagwanshi
- Department of Chemistry
- Govt. Madhav P.G. Science College
- Ujjain
- India
| | - Indrapal Karbhal
- School of Studies in Chemistry
- Pt. Ravishankar Shukla University
- Raipur
- India
| | - Kallol K. Ghosh
- School of Studies in Chemistry
- Pt. Ravishankar Shukla University
- Raipur
- India
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16
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Zhang J, Wang B, Li Y, Shu W, Hu H, Yang L. An acetylcholinesterase biosensor with high stability and sensitivity based on silver nanowire–graphene–TiO2 for the detection of organophosphate pesticides. RSC Adv 2019; 9:25248-25256. [PMID: 35528694 PMCID: PMC9069864 DOI: 10.1039/c9ra02140j] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2019] [Accepted: 08/06/2019] [Indexed: 12/14/2022] Open
Abstract
An electrochemical acetylcholinesterase biosensor based on silver nanowire, graphene, TiO2 sol–gel, chitosan and acetylcholinesterase has been fabricated successfully for the detection of organophosphate pesticides. The outstanding electrical properties of silver nanowires and graphene, and moreover the self-assembly of these two nanomaterials make the biosensor highly sensitive. Simultaneously, the immobilization efficiency of the enzyme is greatly improved by the action of the TiO2 fixed matrix. Under optimum conditions, the biosensor exhibited excellent performance for the detection of dichlorvos with a linearity in the range of 0.036 μM to 22.63 μM and the detection limit was found to be 7.4 nM. The biosensor was highly reproducible and stable during detection and storage. An electrochemical acetylcholinesterase (AChE) biosensor based on silver nanowire, graphene stripped by 1-methyl-2-pyrrolidinone, TiO2 sol–gel, chitosan and AChE has been fabricated successfully for the detection of organophosphate pesticides.![]()
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Affiliation(s)
- Jianhua Zhang
- Key Laboratory of Advanced Display and System Applications
- Ministry of Education
- Shanghai University
- Shanghai 200072
- China
| | - Bo Wang
- Key Laboratory of Advanced Display and System Applications
- Ministry of Education
- Shanghai University
- Shanghai 200072
- China
| | - Yiru Li
- Key Laboratory of Advanced Display and System Applications
- Ministry of Education
- Shanghai University
- Shanghai 200072
- China
| | - Wenhao Shu
- Key Laboratory of Advanced Display and System Applications
- Ministry of Education
- Shanghai University
- Shanghai 200072
- China
| | - Huaying Hu
- Key Laboratory of Advanced Display and System Applications
- Ministry of Education
- Shanghai University
- Shanghai 200072
- China
| | - Lianqiao Yang
- Key Laboratory of Advanced Display and System Applications
- Ministry of Education
- Shanghai University
- Shanghai 200072
- China
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