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Lin X, Yi Q, Qing B, Lan W, Jiang F, Lai Z, Huang J, Liu Q, Jiang J, Wang M, Zou L, Huang X, Wang J. Two Fluorescent Probes for Recognition of Acetylcholinesterase: Design, Synthesis, and Comparative Evaluation. Molecules 2024; 29:1961. [PMID: 38731452 PMCID: PMC11085145 DOI: 10.3390/molecules29091961] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2024] [Revised: 04/20/2024] [Accepted: 04/21/2024] [Indexed: 05/13/2024] Open
Abstract
In this study, two "on-off" probes (BF2-cur-Ben and BF2-cur-But) recognizing acetylcholinesterase (AChE) were designed and synthesized. The obtained probes can achieve recognition of AChE with good selectivity and pH-independence with a linear range of 0.5~7 U/mL and 0.5~25 U/mL respectively. BF2-cur-Ben has a lower limit of detection (LOD) (0.031 U/mL), higher enzyme affinity (Km = 16 ± 1.6 μM), and higher inhibitor sensitivity. A responsive mechanism of the probes for AChE was proposed based on HPLC and mass spectra (MS) experiments, as well as calculations. In molecular simulation, BF2-cur-Ben forms more hydrogen bonds (seven, while BF2-cur-But has only four) and thus has a more stable enzyme affinity, which is mirrored by the results of the comparison of Km values. These two probes could enable recognition of intracellular AChE and probe BF2-cur-Ben has superior cell membrane penetration due to its higher log p value. These probes can monitor the overexpression of AChE during apoptosis of lung cancer cells. The ability of BF2-cur-Ben to monitor AChE in vivo was confirmed by a zebrafish experiment.
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Affiliation(s)
- Xia Lin
- Guangxi Key Laboratory of Special Biomedicine, Medical College, Guangxi University, Nanning 530004, China; (X.L.); (Q.Y.); (W.L.)
- Faculty of Pharmacy, Guangxi Health Science College, Nanning 530023, China;
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China
| | - Qingyuan Yi
- Guangxi Key Laboratory of Special Biomedicine, Medical College, Guangxi University, Nanning 530004, China; (X.L.); (Q.Y.); (W.L.)
| | - Binyang Qing
- College of Life Science and Technology, Guangxi University, Nanning 530004, China; (B.Q.); (M.W.)
| | - Weisen Lan
- Guangxi Key Laboratory of Special Biomedicine, Medical College, Guangxi University, Nanning 530004, China; (X.L.); (Q.Y.); (W.L.)
| | - Fangcheng Jiang
- Pharmaceutical College, Guangxi Medical University, Nanning 530021, China; (F.J.); (Z.L.)
| | - Zefeng Lai
- Pharmaceutical College, Guangxi Medical University, Nanning 530021, China; (F.J.); (Z.L.)
| | - Jijun Huang
- Guangxi Zhuang Autonomous Region Drug Administration, Nanning 530029, China; (J.H.); (Q.L.); (J.J.)
| | - Qing Liu
- Guangxi Zhuang Autonomous Region Drug Administration, Nanning 530029, China; (J.H.); (Q.L.); (J.J.)
| | - Jimin Jiang
- Guangxi Zhuang Autonomous Region Drug Administration, Nanning 530029, China; (J.H.); (Q.L.); (J.J.)
| | - Mian Wang
- College of Life Science and Technology, Guangxi University, Nanning 530004, China; (B.Q.); (M.W.)
| | - Lianjia Zou
- Faculty of Pharmacy, Guangxi Health Science College, Nanning 530023, China;
| | - Xinbi Huang
- Faculty of Pharmacy, Guangxi Health Science College, Nanning 530023, China;
| | - Jianyi Wang
- Guangxi Key Laboratory of Special Biomedicine, Medical College, Guangxi University, Nanning 530004, China; (X.L.); (Q.Y.); (W.L.)
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China
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From nanohole to ultralong straight nanochannel fabrication in graphene oxide with swift heavy ions. Nat Commun 2023; 14:889. [PMID: 36797230 PMCID: PMC9935919 DOI: 10.1038/s41467-023-36357-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2022] [Accepted: 01/27/2023] [Indexed: 02/18/2023] Open
Abstract
Porous architectures based on graphene oxide with precisely tailored nm-sized pores are attractive for biofluidic applications such as molecular sieving, DNA sequencing, and recognition-based sensing. However, the existing pore fabrication methods are complex, suffer from insufficient control over the pore density and uniformity, or are not scalable to large areas. Notably, creating vertical pores in multilayer films appears to be particularly difficult. Here, we show that uniform 6-7 nm-sized holes and straight, vertical nanochannels can be formed by simply irradiating graphene oxide (GO) films with high-energy heavy ions. Long penetration depths of energetic ions in combination with localized energy deposition and effective self-etching processes enable the creation of through pores even in 10 µm-thick GO films. This fully scalable fabrication provides a promising possibility for obtaining innovative GO track membranes.
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Zheng Y, Mao S, Zhu J, Fu L, Moghadam M. A scientometric study on application of electrochemical sensors for detection of pesticide using graphene-based electrode modifiers. CHEMOSPHERE 2022; 307:136069. [PMID: 35985381 DOI: 10.1016/j.chemosphere.2022.136069] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/29/2022] [Revised: 07/29/2022] [Accepted: 08/10/2022] [Indexed: 06/15/2023]
Abstract
Pesticide testing is an important topic in environmental protection and food safety. The development of green, accurate and reliable pesticide residue detection methods is an important technical support for implementing of agricultural quality supervision. Electrochemical sensors are a very promising analytical method for pesticide detection due to their high sensitivity, speed, low cost and portability. Performance enhancement of electrochemical sensors is often accompanied by research advances in materials science. Among them, carbon material is a very important electrode material for the fabrication of electrochemical sensors. The discovery of graphene makes it the most promising candidate among carbon materials for sensor performance enhancement. The topic of this review is the use of graphene-modified electrochemical sensors for pesticide detection in the last decade. Traditional literature summaries and bibliometric analyses were used for an in-depth analysis of this topic. In addition to the introduction of different sensor types and performance comparisons, this review also parses the authors' country, keywords and publication frequency. The related research experienced rapid growth several years ago and has now reached a relatively stable stage. We also discuss the perspectives on this topic.
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Affiliation(s)
- Yuhong Zheng
- Institute of Botany, Jiangsu Province and Chinese Academy of Sciences (Nanjing Botanical Garden, Memorial Sun Yat-Sen), Nanjing, 210014, China
| | - Shuduan Mao
- Interdisciplinary Research Academy, Zhejiang Shuren University, Hangzhou, 310021, PR China.
| | - Jiangwei Zhu
- Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing, 210037, China
| | - Li Fu
- Key Laboratory of Novel Materials for Sensor of Zhejiang Province, College of Materials and Environmental Engineering, Hangzhou Dianzi University, Hangzhou, 310018, China.
| | - Majid Moghadam
- Department of Chemistry, University of Isfahan, Isfahan, 81746-73441, Iran
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Ozcelikay G, Karadurmus L, Bilge S, Sınağ A, Ozkan SA. New analytical strategies Amplified with 2D carbon nanomaterials for electrochemical sensing of food pollutants in water and soils sources. CHEMOSPHERE 2022; 296:133974. [PMID: 35181423 DOI: 10.1016/j.chemosphere.2022.133974] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/18/2021] [Revised: 01/13/2022] [Accepted: 02/11/2022] [Indexed: 06/14/2023]
Abstract
Pharmaceutical and food pollutants have threatened global health. Pharmacotherapy has left a positive impression in the field of health and life of people and animals. However, the many unresolved problems brought along with residues of pharmaceuticals in the environmental and food. Consumption of the world's freshwater resources, toxic chemicals, air pollution, plastic waste directly affects water and soil resources. Pesticides have a wide role in pollutants. Therefore, the determination of pesticides is significant to eliminate their negative effects on living things. Nowadays, there are many analytical methods available. However, new analysis methods are still being researched due to certain limitations of traditional methods. Electrochemical sensors have drawn attention because of their superior properties, such as short analysis time, affordability, high sensitivity, and selectivity. The development of new analytical strategies for assessing risks from pharmaceutical to food pollutants in water and soil sources is important for the measurement of different pollutants. Moreover, the 2D-carbon nanomaterials used in the development of electrochemical sensors are widely utilized to enlarge the surface area, increase porosity, and make easy immobilization. Graphene (graphene derivations) and carbon nanotubes integrated nanosensors are widely used for the determination of pesticides. 2D-carbon nanomaterials can be tailored according to the purpose of the study. The characterization and synthesis methods of 2D-carbon nanomaterials are widely explained. Furthermore, enzyme nanobiosensors, especially Acetylcholinesterase (AChE), are widely used to determine pesticides. The three main topics are focused on in this review: 2D-carbon nanomaterials, pesticides that threaten life, and the application of 2D-carbon nanomaterials-based electrochemical sensors. The various developed 2D-carbon nanomaterials-based electrochemical sensors were applied in pharmaceutical forms, fruits, tap/lake water, beverages, and soils sources. This work aims to indicate the recently published paper related to pesticide analysis and highlight the importance of 2D-nanomaterials on sensors.
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Affiliation(s)
- Goksu Ozcelikay
- Ankara University, Faculty of Pharmacy, Department of Analytical Chemistry, 06560, Ankara, Turkey
| | - Leyla Karadurmus
- Ankara University, Faculty of Pharmacy, Department of Analytical Chemistry, 06560, Ankara, Turkey; Adıyaman University, Faculty of Pharmacy, Department of Analytical Chemistry, Adıyaman, Turkey
| | - Selva Bilge
- Ankara University, Faculty of Science, Department of Chemistry, 06100, Ankara, Turkey
| | - Ali Sınağ
- Ankara University, Faculty of Science, Department of Chemistry, 06100, Ankara, Turkey
| | - Sibel A Ozkan
- Ankara University, Faculty of Pharmacy, Department of Analytical Chemistry, 06560, Ankara, Turkey.
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Li M, Guo L, Chen L, Lin C, Wang L. A novel imine-linked covalent organic framework for rapid detection of methyl paraoxon. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2021; 13:5727-5734. [PMID: 34812807 DOI: 10.1039/d1ay01617b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Methyl paraoxon (MP) has attracted more and more attention in recent years because of its severe neurotoxicity and respiratory toxicity. Therefore, it is very urgent to develop new and sensitive MP detection methods for health protection and public safety. Covalent organic frameworks (COFs) are widely used in fluorescence detection because they can effectively transmit and amplify probe signals with multiple identical binding sites within an extended framework. Here, COFML-DHTA nanosheet material was synthesized by the solvothermal reaction of melem (ML) and 2,5-dihydroxyterephthalaldehyde (DHTA). The resulting COFML-DHTA exhibits remarkable luminescence quenching toward MP due to the relationship of competitive absorption and Förster resonance energy transfer between MP and COFML-DHTA. COFML-DHTA can be used for sensitive and selective detection of MP in a wide concentration range of 0.57 ng mL-1 to 30 μg mL-1 with a detection limit of 0.19 ng mL-1. The material has good chemical stability, excellent selectivity, good reusability and hydrophilicity, which provide more possibilities for COFs in the detection of pesticides.
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Affiliation(s)
- Mengyao Li
- Key Laboratory of Functional Small Organic Molecule, Ministry of Education, Key Laboratory of Chemical Biology, College of Chemistry and Chemical Engineering, Jiangxi Normal University, 99 Ziyang Road, Nanchang 330022, Jiangxi Province, China.
| | - Lulu Guo
- Key Laboratory of Functional Small Organic Molecule, Ministry of Education, Key Laboratory of Chemical Biology, College of Chemistry and Chemical Engineering, Jiangxi Normal University, 99 Ziyang Road, Nanchang 330022, Jiangxi Province, China.
| | - Lili Chen
- Key Laboratory of Functional Small Organic Molecule, Ministry of Education, Key Laboratory of Chemical Biology, College of Chemistry and Chemical Engineering, Jiangxi Normal University, 99 Ziyang Road, Nanchang 330022, Jiangxi Province, China.
| | - Chunhua Lin
- Key Laboratory of Functional Small Organic Molecule, Ministry of Education, Key Laboratory of Chemical Biology, College of Chemistry and Chemical Engineering, Jiangxi Normal University, 99 Ziyang Road, Nanchang 330022, Jiangxi Province, China.
| | - Li Wang
- Key Laboratory of Functional Small Organic Molecule, Ministry of Education, Key Laboratory of Chemical Biology, College of Chemistry and Chemical Engineering, Jiangxi Normal University, 99 Ziyang Road, Nanchang 330022, Jiangxi Province, China.
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6
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Recent advances of enzyme biosensors for pesticide detection in foods. JOURNAL OF FOOD MEASUREMENT AND CHARACTERIZATION 2021. [DOI: 10.1007/s11694-021-01032-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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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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Hu H, Yang L. Development of enzymatic electrochemical biosensors for organophosphorus pesticide detection. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART. B, PESTICIDES, FOOD CONTAMINANTS, AND AGRICULTURAL WASTES 2020; 56:168-180. [PMID: 33284686 DOI: 10.1080/03601234.2020.1853460] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
The enzymatic electrochemical biosensor has the advantages of simple operation, speed, and integration in the detection of organophosphorus pesticide (OPs) residues. It has the potential to become the best alternative to the traditional OP detection technology. This article introduces the OP identification principle of different enzymes, the OP detection mechanism of several common sensors, and the enzyme assembly method. In addition, the article discusses application of nanomaterials in sensor preparation and sensor performance parameters in the past decade. The related content of early sensors is outside the scope of this article.
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Affiliation(s)
- Huaying Hu
- School of Materials Science and Engineering, Shanghai University, Shanghai, China
| | - Lianqiao Yang
- School of Materials Science and Engineering, Shanghai University, Shanghai, China
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A simple enzymeless approach for Paraoxon determination using imidazole-functionalized carbon nanotubes. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2020; 116:111140. [PMID: 32806307 DOI: 10.1016/j.msec.2020.111140] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/22/2019] [Revised: 05/13/2020] [Accepted: 05/28/2020] [Indexed: 12/23/2022]
Abstract
This work describes the application of a glassy carbon electrode (GCE) modified with imidazole functionalized carbon nanotubes (CNT-H-IMZ) for Paraoxon (PX) determination in samples of commercial, fresh and 100% orange juice. Homemade multi-walled CNTs were treated according to the Hummers procedure to oxidize graphite and later chemically functionalized with imidazole groups. Modified electrodes with CNT-H-IMZ presented a high peak current of PX reduction and an electrocatalytic effect in comparison to the other electrodes. This behavior was associated with the synergistic contribution of IMZ and CNT that increases the electrochemical activity of PX. Repeatability and reproducibility studies showed that the relative peak current values did not show significant differences between them, less than 10%, and it was possible to define that the diffusional process is the mechanism that limits the electrode mass transport. After the optimization of parameters inherent to the methodology and the voltammetric technique, the proposed device presented a linear region of 1.0 to 16.0 μM-1 (R2 = 0.99), presenting LOD and LOQ as 120 and 400 nM-1, respectively. The method proposed was successfully applied to PX determination in spiked samples.
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Zhang P, Fu C, Xiao Y, Zhang Q, Ding C. Copper(II) complex as a turn on fluorescent sensing platform for acetylcholinesterase activity with high sensitivity. Talanta 2019; 208:120406. [PMID: 31816742 DOI: 10.1016/j.talanta.2019.120406] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2018] [Revised: 08/14/2019] [Accepted: 09/27/2019] [Indexed: 10/25/2022]
Abstract
Acetylcholinesterase (AChE) is an important enzyme associated with many nervous diseases, demonstrating the great need for smarter sensing platform with improved sensitivity, selectivity and simplified operation. A "turn on" fluorometric assay is described herein for AChE activity detection, according to the specific enzyme catalyzed reaction of acetylcholine (ATCh) by AChE, which generates thiocholine (TCh) as the product. The well-designed fluorescent probe HBTP possesses ESIPT (Excited State Intramolecular Proton Transfer) nature, leading to a larger Stokes shift, which could be quenched upon coordination with Cu2+. The fluorescence-silent HBTP-Cu2+ complex could be broken by TCh generated from reaction of ATCh with AChE, giving rise to HBTP release which originates from competitive coordination of TCh with Cu2+. This complex probe HBTP-Cu2+ offers a limit detection as low as 0.02 mU mL-1, which is lower than most reported literatures. Furthermore, both HBTP-Cu2+ and HBTP show little toxicity to live cells and is available in visualizing cellular AChE activity.
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Affiliation(s)
- Peng Zhang
- Key Laboratory of Optic-electric Sensing and Analytical Chemistry for Life Science, MOE, Shandong Key Laboratory of Biochemical Analysis, Key Laboratory of Analytical Chemistry for Life Science in Universities of Shandong, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao, 266042, PR China
| | - Caixia Fu
- Key Laboratory of Optic-electric Sensing and Analytical Chemistry for Life Science, MOE, Shandong Key Laboratory of Biochemical Analysis, Key Laboratory of Analytical Chemistry for Life Science in Universities of Shandong, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao, 266042, PR China
| | - Yuzhe Xiao
- Key Laboratory of Optic-electric Sensing and Analytical Chemistry for Life Science, MOE, Shandong Key Laboratory of Biochemical Analysis, Key Laboratory of Analytical Chemistry for Life Science in Universities of Shandong, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao, 266042, PR China
| | - Qian Zhang
- Key Laboratory of Optic-electric Sensing and Analytical Chemistry for Life Science, MOE, Shandong Key Laboratory of Biochemical Analysis, Key Laboratory of Analytical Chemistry for Life Science in Universities of Shandong, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao, 266042, PR China
| | - Caifeng Ding
- Key Laboratory of Optic-electric Sensing and Analytical Chemistry for Life Science, MOE, Shandong Key Laboratory of Biochemical Analysis, Key Laboratory of Analytical Chemistry for Life Science in Universities of Shandong, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao, 266042, PR China.
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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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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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13
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Randall JD, Eyckens DJ, Stojcevski F, Francis PS, Doeven EH, Barlow AJ, Barrow AS, Arnold CL, Moses JE, Henderson LC. Modification of Carbon Fibre Surfaces by Sulfur-Fluoride Exchange Click Chemistry. Chemphyschem 2018; 19:3176-3181. [PMID: 30253016 DOI: 10.1002/cphc.201800789] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2018] [Indexed: 01/28/2023]
Abstract
Technologies that enable surface modification are in high demand and are critical for the implementation of new functional materials and devices. Here, we describe the first modification of a carbon surface (in this case carbon fiber) using the sulfur-fluoride exchange (SuFEx) reaction. The parent sulfur (VI) fluoride moiety can be installed directly to the surface via electrochemical deposition of the fluorosulfate phenyldiazonium tetrafluoroborate salt, or by 'SuFExing' a phenol on the carbon surface followed by treatment of the material with SO2 F2 ; similar to a 'graft to' or 'graft from' functionalization approach. We demonstrate that these SuFEx-able surfaces readily undergo exchange with aryl silyl ethers, and that the subsequent sulfate linkages are themselves stable under electrochemical redox conditions. Finally, we showcase the utility of the SuFEx chemistry by installing a pendant amino group to the fiber surface resulting in interfacial shear strength improvements of up to 130 % in epoxy resin.
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Affiliation(s)
- James D Randall
- Deakin University, 75 Pigdons Road, Geelong, Waurn Ponds, Victoria, Australia, 3216
| | - Daniel J Eyckens
- Deakin University, 75 Pigdons Road, Geelong, Waurn Ponds, Victoria, Australia, 3216
| | - Filip Stojcevski
- Deakin University, 75 Pigdons Road, Geelong, Waurn Ponds, Victoria, Australia, 3216
| | - Paul S Francis
- Deakin University, 75 Pigdons Road, Geelong, Waurn Ponds, Victoria, Australia, 3216
| | - Egan H Doeven
- Deakin University, 75 Pigdons Road, Geelong, Waurn Ponds, Victoria, Australia, 3216
| | - Anders J Barlow
- Centre for Materials and Surface Science and Department of Chemistry and Physics, School of Molecular Sciences, La Trobe University, Melbourne, Victoria, Australia, 3086
| | - Andrew S Barrow
- The Click Chemistry Research Laboratory, La Trobe Institute for Molecular Science, Bundoora, Melbourne, Victoria, Australia, 3083
| | - Chantelle L Arnold
- Deakin University, 75 Pigdons Road, Geelong, Waurn Ponds, Victoria, Australia, 3216
| | - John E Moses
- The Click Chemistry Research Laboratory, La Trobe Institute for Molecular Science, Bundoora, Melbourne, Victoria, Australia, 3083
| | - Luke C Henderson
- Deakin University, 75 Pigdons Road, Geelong, Waurn Ponds, Victoria, Australia, 3216
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