1
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Naked–eye colorimetric and switch–on fluorescence chemosensor based on a rhodamine derivative for Hg2+: Smartphone device, test–kit and food sample applications. J Photochem Photobiol A Chem 2023. [DOI: 10.1016/j.jphotochem.2023.114558] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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2
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Kuang H, Wang D, Schneiderman Z, Tsapatsis M, Kokkoli E. Supramolecular Assembly of Single-Tail ssDNA-Amphiphiles through π-π Interactions. Bioconjug Chem 2022; 33:2035-2040. [PMID: 35699360 DOI: 10.1021/acs.bioconjchem.2c00090] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
In this work, we demonstrate the formation of supramolecular architectures from the assembly of single-tail single stranded DNA (ssDNA)-amphiphiles. Short ssDNA sequences of 10 nucleotides that were either unstructured or formed G-quadruplex secondary structures were conjugated to a single 4-(hexadecyloxy)benzamide tail, either directly or through a polycarbon (C12) spacer. Conjugation of the ssDNA to the tail did not interfere with the G-quadruplex secondary structure of the ssDNA sequence. The ssDNA-amphiphiles self-assembled into ellipsoidal micelles, vesicles, nanotapes, and nanotubes. These nanotubes appeared to be formed by the rolling up of nanotapes. The increase of the hydrophobic block of the ssDNA-amphiphiles through the addition of a C12 spacer led to an increase in wall thickness and nanotube diameter. The presence of π-π interactions, through the benzoic group, was verified via X-ray diffraction (XRD) and played a critical role in the formation of the different nanostructures. In contrast, ssDNA-amphiphiles with a single heptadecanoic acid tail self-assembled only into ellipsoidal micelles.
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Affiliation(s)
- Huihui Kuang
- Institute for NanoBioTechnology, Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - Danyu Wang
- Institute for NanoBioTechnology, Johns Hopkins University, Baltimore, Maryland 21218, United States.,Department of Chemical and Biomolecular Engineering, Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - Zachary Schneiderman
- Institute for NanoBioTechnology, Johns Hopkins University, Baltimore, Maryland 21218, United States.,Department of Chemical and Biomolecular Engineering, Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - Michael Tsapatsis
- Institute for NanoBioTechnology, Johns Hopkins University, Baltimore, Maryland 21218, United States.,Department of Chemical and Biomolecular Engineering, Johns Hopkins University, Baltimore, Maryland 21218, United States.,Applied Physics Laboratory, Johns Hopkins University, Laurel, Maryland 20723, United States
| | - Efrosini Kokkoli
- Institute for NanoBioTechnology, Johns Hopkins University, Baltimore, Maryland 21218, United States.,Department of Chemical and Biomolecular Engineering, Johns Hopkins University, Baltimore, Maryland 21218, United States
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3
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Huang Y, Ma J, Yan Y, Li C. Metal-bridged DNA-functionalized silica nanoparticles for multifacet biological applications. Microchem J 2022. [DOI: 10.1016/j.microc.2021.107017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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4
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Tian R, Wang S, Qiu Y, Zong Z, Han T, Zhang Y. DNA tweezers-controlled direct electrical contact of horseradish peroxidase on porous carbon nanotube substrate. TALANTA OPEN 2021. [DOI: 10.1016/j.talo.2021.100071] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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5
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Karuk Elmas SN, Dinckan S, Arslan FN, Aydin D, Savran T, Yilmaz I. A rhodamine based nanosensor platform for Hg2+ sensing in near–perfect aqueous medium: Smartphone, test strip and real sample applications. J Photochem Photobiol A Chem 2021. [DOI: 10.1016/j.jphotochem.2021.113521] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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6
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Ko E, Hur W, Son SE, Seong GH, Han DK. Au nanoparticle-hydrogel nanozyme-based colorimetric detection for on-site monitoring of mercury in river water. Mikrochim Acta 2021; 188:382. [PMID: 34657212 DOI: 10.1007/s00604-021-05032-4] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2021] [Accepted: 09/17/2021] [Indexed: 11/25/2022]
Abstract
A sensitive on-site mercury sensing platform was developed for simple and effective monitoring of mercury levels in the field. The simple and practical mercury detection system was designed by integrating an Au nanoparticle-PEG hydrogel block nanozyme (Au-HBNz) into a polymer film-based colorimetric device. Upon addition of Hg2+ ions, Au-HBNz exhibited excellent peroxidase-like activity, catalyzing the oxidation of 3,3',5,5'-tetramethylbenzidine into a blue-colored product, which has a maximum absorbance at 652 nm. The resulting color intensity change was evaluated using a smartphone for simple and rapid Hg2+ detection with a broad detection range (0.008-20 μg∙mL-1) and a linear concentration-response relationship (R2 = 0.96). The detection limit (1.10 ng∙mL-1) was lower than the maximum permissible Hg2+ levels in drinking water set by the World Health Organization (6 ng∙mL-1) and U.S. Environmental Protection Agency (2 ng∙mL-1). The recoveries of Hg2+ determination in river water by spiking Hg2+ samples ranged from 92 to 106%, which indicated high validity and applicability of the Hg2+ detection system for field measurements. Thus, the developed sensor enables highly selective and efficient real-time monitoring of Hg2+.
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Affiliation(s)
- Euna Ko
- Division of Materials Analysis Research, Korea Basic Science Institute, 169-148, Gwahak-ro, Yuseong-Gu, Daejeon, 34133, Republic of Korea
| | - Won Hur
- Department of Bionano Engineering, Hanyang University, 55 Hanyangdaehak-ro, Sangnok-gu, Ansan, Gyeonggi-do, 15588, Republic of Korea
| | - Seong Eun Son
- Department of Bionano Engineering, Hanyang University, 55 Hanyangdaehak-ro, Sangnok-gu, Ansan, Gyeonggi-do, 15588, Republic of Korea
| | - Gi Hun Seong
- Department of Bionano Engineering, Hanyang University, 55 Hanyangdaehak-ro, Sangnok-gu, Ansan, Gyeonggi-do, 15588, Republic of Korea
| | - Do Kyoung Han
- Division of Materials Analysis Research, Korea Basic Science Institute, 169-148, Gwahak-ro, Yuseong-Gu, Daejeon, 34133, Republic of Korea.
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Kamal S, Yang TCK. Silver enriched silver phosphate microcubes as an efficient recyclable SERS substrate for the detection of heavy metal ions. J Colloid Interface Sci 2021; 605:173-181. [PMID: 34325339 DOI: 10.1016/j.jcis.2021.07.084] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2021] [Revised: 07/09/2021] [Accepted: 07/15/2021] [Indexed: 12/17/2022]
Abstract
A rapid, cost-effective and accurate detection of heavy metal ions is crucial for human health monitoring and environmental protection. Surface-enhanced Raman spectroscopy (SERS) has become a reliable method due to its outstanding performance for the identification of contaminants. In this paper, silver phosphate microcubes (Ag3PO4) were fabricated using two different precipitation methods for ultrasensitive SERS detection of heavy metal ions. The use of an organic linker (BPy) with Ag3PO4 enabled the immobilization of Hg2+ and Pb2+ ions. The formation of Ag3PO4 was confirmed by XRD, UV-DRS, FESEM coupled with EDX and HRTEM. The analytical enhancement factor (AEF) obtained was 1010 with a detection limit of 10-15 M indicating high sensitivity. Based on these results, the possible SERS mechanism has been proposed and discussed. Moreover, an excellent reusability of Ag3PO4 substrate for at least four cycles was achieved upon the light exposure on heavy metal loaded substrate due to its superior catalytic ability for the degradation of heavy metal ions. The as-prepared substrate demonstrated remarkable stability, selectivity and SERS sensitivity towards real samples. The results conclude that Ag3PO4 microcubes offer a great prospect in recyclable SERS applications.
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Affiliation(s)
- Surabhi Kamal
- Department of Chemical Engineering and Biotechnology, National Taipei University of Technology, No. 1, Section 3, Zhongxiao East Road, Da'an District, 106 Taipei City, Taiwan.
| | - Thomas Chung-Kuang Yang
- Department of Chemical Engineering and Biotechnology, National Taipei University of Technology, No. 1, Section 3, Zhongxiao East Road, Da'an District, 106 Taipei City, Taiwan; Precision Analysis and Materials Research Centre, National Taipei University of Technology, No. 1, Section 3, Zhongxiao East Road, Da'an District, 106 Taipei City, Taiwan.
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8
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Lu S, Shen J, Fan C, Li Q, Yang X. DNA Assembly-Based Stimuli-Responsive Systems. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2021; 8:2100328. [PMID: 34258165 PMCID: PMC8261508 DOI: 10.1002/advs.202100328] [Citation(s) in RCA: 42] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2021] [Revised: 03/05/2021] [Indexed: 05/06/2023]
Abstract
Stimuli-responsive designs with exogenous stimuli enable remote and reversible control of DNA nanostructures, which break many limitations of static nanostructures and inspired development of dynamic DNA nanotechnology. Moreover, the introduction of various types of organic molecules, polymers, chemical bonds, and chemical reactions with stimuli-responsive properties development has greatly expand the application scope of dynamic DNA nanotechnology. Here, DNA assembly-based stimuli-responsive systems are reviewed, with the focus on response units and mechanisms that depend on different exogenous stimuli (DNA strand, pH, light, temperature, electricity, metal ions, etc.), and their applications in fields of nanofabrication (DNA architectures, hybrid architectures, nanomachines, and constitutional dynamic networks) and biomedical research (biosensing, bioimaging, therapeutics, and theranostics) are discussed. Finally, the opportunities and challenges for DNA assembly-based stimuli-responsive systems are overviewed and discussed.
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Affiliation(s)
- Shasha Lu
- School of Chemistry and Chemical EngineeringFrontiers Science Center for Transformative MoleculesInstitute of Translational MedicineShanghai Jiao Tong UniversityShanghai200240China
| | - Jianlei Shen
- School of Chemistry and Chemical EngineeringFrontiers Science Center for Transformative MoleculesInstitute of Translational MedicineShanghai Jiao Tong UniversityShanghai200240China
| | - Chunhai Fan
- School of Chemistry and Chemical EngineeringFrontiers Science Center for Transformative MoleculesInstitute of Translational MedicineShanghai Jiao Tong UniversityShanghai200240China
- Institute of Molecular MedicineShanghai Key Laboratory for Nucleic Acid Chemistry and NanomedicineDepartment of UrologyRenji HospitalSchool of MedicineShanghai Jiao Tong UniversityShanghai200127China
| | - Qian Li
- School of Chemistry and Chemical EngineeringFrontiers Science Center for Transformative MoleculesInstitute of Translational MedicineShanghai Jiao Tong UniversityShanghai200240China
| | - Xiurong Yang
- School of Chemistry and Chemical EngineeringFrontiers Science Center for Transformative MoleculesInstitute of Translational MedicineShanghai Jiao Tong UniversityShanghai200240China
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Yang X, Zhang M, Chen Z, Bu Y, Gao X, Sui Y, Yu Y. Sodium Alginate Micelle-Encapsulating Zinc Phthalocyanine Dye-Sensitized Photoelectrochemical Biosensor with CdS as the Photoelectric Material for Hg 2+ Detection. ACS APPLIED MATERIALS & INTERFACES 2021; 13:16828-16836. [PMID: 33784812 DOI: 10.1021/acsami.1c00215] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
A simple and selective photoelectrochemical (PEC) biosensor was constructed for Hg2+ detection based on zinc phthalocyanine (ZnPc) dye-sensitized CdS using alginate not only as a carrier but also as a binder. First, CdS as a photoactive material was in situ modified on the electrode surface using a rapid and simple electrodeposition to obtain an initial photocurrent signal. Second, ZnPc was loaded in the amphiphilic alginate micelle and then was coated onto the CdS film surface via alginate as the binder. The photocurrent was subsequently enhanced due to the favorable dye sensitization effect of ZnPc to CdS. Finally, the thymine-rich probe DNA was immobilized on the modified ITO surface via coupling reaction between the carbonyl groups of the amphiphilic polymer and the amino groups of the probe DNA. In the presence of Hg2+, the thymine-Hg2+-thymine (T-Hg2+-T) structure was formed due to the specific bond of Hg2+ with thymine, resulting in the decrease of photocurrent due to the increase of steric hindrance on the modified electrode surface. The proposed PEC biosensor for Hg2+ detection possessed a wide linear range from 10 pM to 1.0 μM with a detection limit of 5.7 pM. This biosensor provides a promising platform for detecting other biomolecules of interest.
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Affiliation(s)
- Xiaoyan Yang
- 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
| | - Mengjie 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
| | - Zixuan Chen
- 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
| | - Yuwei Bu
- 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
| | - Xue Gao
- 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
| | - Yongkun Sui
- 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
| | - Yueqin Yu
- 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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10
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Wang X, Chen X, Zhou R, Hu P, Huang K, Chen P. Filter-Assisted Separation of Multiple Nanomaterials: Mechanism and Application in Atomic/Mass Spectrometry/Fluorescence Label-Free Multimode Bioassays. Anal Chem 2021; 93:3889-3897. [PMID: 33595278 DOI: 10.1021/acs.analchem.0c04562] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Atomic spectrometry (AS) has been widely used in bioassay, but it requires steps to immobilize or separate the signal molecules. In this work, based on the phenomenon that the filter membrane can selectively separate multiple nanomaterials (nanoparticles (NPs) and quantum dots (QDs)) and its related ions, including poly(thymine)-templated Cu NPs and free Cu2+, Ag NPs and free Ag+, CdTe QDs and Cd2+, we constructed multimode and label-free biosensors by chemical vapor generation-atomic fluorescence spectrometry (CVG-AFS), inductively coupled plasma mass spectrometry (ICP-MS), and fluorescence. In this strategy, terminal deoxynucleotidyl transferase (TdT) and polynucleotide kinase (PNK), H2O2, and mucin 1 can be sensitively detected using Cu2+, Ag+, and Cd2+ as the signal probe, respectively. As a result, TdT and T4 PNK in single cells level can be accurately quantified. In addition, the possible separation mechanism of filter membrane was proposed, both Donnan repulsion by charged functional layer and entrapment effect by nanomaterials size contributed to the outstanding separation performance. Subsequently, on the basis that CdTe QDs can selectively identify Cu NPs/Cu2+, Ag NPs/Ag+, and C-Ag+-C/Ag+, cation-exchange reaction (CER) was introduced in this platform due to its unique advantages, including improving the sensitivity of the above system (an order of magnitude), converting the non-CVG metal elements into CVG elements, and using low-cost AFS to substitute the high-cost ICP-MS. In addition, we performed theoretical calculations of the selective CER using density functional theory (DFT). Therefore, this label-free and simple separation AS/ICP-MS sensing platform shows great potential for biomarker analysis.
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Affiliation(s)
- Xiu Wang
- College of Chemistry and Material Science, Sichuan Normal University, Chengdu, Sichuan 610068, China
| | - Xin Chen
- College of Chemistry and Material Science, Sichuan Normal University, Chengdu, Sichuan 610068, China
| | - Ronghui Zhou
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China
| | - Pingyue Hu
- College of Chemistry and Material Science, Sichuan Normal University, Chengdu, Sichuan 610068, China
| | - Ke Huang
- College of Chemistry and Material Science, Sichuan Normal University, Chengdu, Sichuan 610068, China
| | - Piaopiao Chen
- Department of Laboratory Medicine, State Key Laboratory of Biotherapy and Cancer Center, Med+X Center for Manufacturing, West China Hospital, Sichuan University and Collaborative Innovation Center for Biotherapy, Chengdu, Sichuan 610041, China
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11
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Mahajan PG, Shin JS, Dige NC, Vanjare BD, Han Y, Choi NG, Kim SJ, Seo SY, Lee KH. Chelation enhanced fluorescence of rhodamine based novel organic nanoparticles for selective detection of mercury ions in aqueous medium and intracellular cell imaging. J Photochem Photobiol A Chem 2020. [DOI: 10.1016/j.jphotochem.2020.112579] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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12
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Zhang Y, Xiao JY, Zhu Y, Tian LJ, Wang WK, Zhu TT, Li WW, Yu HQ. Fluorescence Sensor Based on Biosynthetic CdSe/CdS Quantum Dots and Liposome Carrier Signal Amplification for Mercury Detection. Anal Chem 2020; 92:3990-3997. [DOI: 10.1021/acs.analchem.9b05508] [Citation(s) in RCA: 51] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Yi Zhang
- CAS Key Laboratory of Urban Pollutant Conversion, Department of Applied Chemistry, University of Science and Technology of China, Hefei, 230026, China
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, China
| | - Jing-Yu Xiao
- CAS Key Laboratory of Urban Pollutant Conversion, Department of Applied Chemistry, University of Science and Technology of China, Hefei, 230026, China
| | - Yuan Zhu
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, China
| | - Li-Jiao Tian
- CAS Key Laboratory of Urban Pollutant Conversion, Department of Applied Chemistry, University of Science and Technology of China, Hefei, 230026, China
| | - Wei-Kang Wang
- CAS Key Laboratory of Urban Pollutant Conversion, Department of Applied Chemistry, University of Science and Technology of China, Hefei, 230026, China
| | - Ting-Ting Zhu
- CAS Key Laboratory of Urban Pollutant Conversion, Department of Applied Chemistry, University of Science and Technology of China, Hefei, 230026, China
| | - Wen-Wei Li
- CAS Key Laboratory of Urban Pollutant Conversion, Department of Applied Chemistry, University of Science and Technology of China, Hefei, 230026, China
| | - Han-Qing Yu
- CAS Key Laboratory of Urban Pollutant Conversion, Department of Applied Chemistry, University of Science and Technology of China, Hefei, 230026, China
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13
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Indirect determination of mercury(II) by using magnetic nanoparticles, CdS quantum dots and mercury(II)-binding aptamers, and quantitation of released CdS by graphite furnace AAS. Mikrochim Acta 2020; 187:91. [PMID: 31897821 DOI: 10.1007/s00604-019-4029-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2019] [Accepted: 11/11/2019] [Indexed: 01/07/2023]
Abstract
This work describes an aptamer based method for highly sensitive determination of Hg(II). A Hg(II)-binding ssDNA aptamer was linked to silica-coated magnetic nanoparticles (magNPs). Then, a conjugate composed of graphene and CdS quantum dots (Gr-CdS) was linked to the complementary ssDNA. On mixing the two components, a duplex of type magNP-dsNNA-Gr/CdS is generated. If Hg(II) is added, it wills capturing the aptamer, and this leads to the release of Gr/CdS because of the formation of a stable thymine-Hg2+-thymine link. External magnetic force is used to remove the remaining complex. The released graphene-CdS is decomposed by HNO3 and injected into a graphite furnace AAS. The detectable amount of Cd is proportional to the concentration of Hg(II) in the sample. Under the optimal conditions, the method has a linear response in the 2.50 aM to 0.25 nM Hg(II) concentration range, and the detection limit is as low as 7.6 aM (at S/N = 3). It has high selectivity for Hg(II) over other metal ions. Graphical abstract.
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14
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Schmidt OP, Jurt S, Johannsen S, Karimi A, Sigel RKO, Luedtke NW. Concerted dynamics of metallo-base pairs in an A/B-form helical transition. Nat Commun 2019; 10:4818. [PMID: 31645548 PMCID: PMC6811676 DOI: 10.1038/s41467-019-12440-x] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2018] [Accepted: 09/05/2019] [Indexed: 01/31/2023] Open
Abstract
Metal-mediated base pairs expand the repertoire of nucleic acid structures and dynamics. Here we report solution structures and dynamics of duplex DNA containing two all-natural C-HgII-T metallo base pairs separated by six canonical base pairs. NMR experiments reveal a 3:1 ratio of well-resolved structures in dynamic equilibrium. The major species contains two (N3)T-HgII-(N3)C base pairs in a predominantly B-form helix. The minor species contains (N3)T-HgII-(N4)C base pairs and greater A-form characteristics. Ten-fold different 1J coupling constants (15N,199Hg) are observed for (N3)C-HgII (114 Hz) versus (N4)C-HgII (1052 Hz) connectivities, reflecting differences in cytosine ionization and metal-bonding strengths. Dynamic interconversion between the two types of C-HgII-T base pairs are coupled to a global conformational exchange between the helices. These observations inspired the design of a repetitive DNA sequence capable of undergoing a global B-to-A-form helical transition upon adding HgII, demonstrating that C-HgII-T has unique switching potential in DNA-based materials and devices.
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Affiliation(s)
- Olivia P Schmidt
- Department of Chemistry, University of Zurich, Zurich, Switzerland
| | - Simon Jurt
- Department of Chemistry, University of Zurich, Zurich, Switzerland
| | - Silke Johannsen
- Department of Chemistry, University of Zurich, Zurich, Switzerland
| | - Ashkan Karimi
- Department of Chemistry, University of Zurich, Zurich, Switzerland
| | - Roland K O Sigel
- Department of Chemistry, University of Zurich, Zurich, Switzerland
| | - Nathan W Luedtke
- Department of Chemistry, University of Zurich, Zurich, Switzerland.
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Ultrasensitive impedimetric mercury(II) sensor based on thymine-Hg(II)-thymine interaction and subsequent disintegration of multiple sandwich-structured DNA chains. Mikrochim Acta 2018; 185:555. [PMID: 30465290 DOI: 10.1007/s00604-018-3097-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2018] [Accepted: 11/15/2018] [Indexed: 02/07/2023]
Abstract
An impedimetric method is described for ultrasensitive analysis of mercury(II). It is based on thymine-Hg(II)-thymine interaction which causes the disintegration of multiple-sandwich structured DNA chains. DNA strands were selected that are partially complementary to the T-rich Hg(II)-specific oligonucleotides (MSO). They were immobilized on a gold electrode via Au-S interaction. Next, the MSO and the bridging strands (BS) that can connect adjacent MSOs were alternately attached through layer-by-layer hybridization. Thus, a multiple-sandwich structured interface in created that carries numerous MSOs. This leads to a change-transfer resistance (Rct) values of the electrode-electrolyte interface at faradic electrochemical impedance spectroscopy measurements in the presence of the hexacyanoferrate(II)/(III) redox probe at 0.2 V (vs. Ag/AgCl). If Hg(II) is added to the solution, the MSOs selectively interact with Hg(II) to produce T-Hg(II)-T structures. Hence, the multiple-sandwich hybridization chains become disintegrated, and this causes a decrease in resistivity. The effect can be used to quantify Hg(II) over an analytical range that extends over four orders of magnitude (1 fM to 10 pM), and it has a 0.16 fM limit of detection under optimal conditions. Graphical abstract An electrochemical sensor for femtomolar level detection of Hg2+ is realized on the basis of thymine-Hg2+-thymine interaction which causes disintegration of multiple sandwich DNA hybridization strands.
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Zhang X, Huang C, Jiang Y, Jiang Y, Shen J, Han E. Structure-Switching Electrochemical Aptasensor for Single-Step and Specific Detection of Trace Mercury in Dairy Products. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2018; 66:10106-10112. [PMID: 30183296 DOI: 10.1021/acs.jafc.8b03259] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
A reagentless and single-step electrochemical aptasensor with separation-free fashion and rapid response is developed for the Hg2+ assay in dairy products. Herein, the sensing strategy is established on Hg2+-induced structural transition of the methylene-blue-tagged single-stranded DNA (ssDNA) from a flexible manner to rigid hairpin-shaped double-stranded DNA (dsDNA), generating an improved peak current for the Hg2+ assay with a detection limit of 0.62 fM. Importantly, the best signal-to-noise ratio value can be obtained by exploiting Au flowers as sensing material and the optimal ssDNA concentration. The proposed sensor also exhibits high selectivity as a result of the specific thymine-Hg2+-thymine (T-Hg2+-T) coordination chemistry and can be applied to detect Hg2+ in dairy products. With the use of the electric "signal-on" switch, the electrochemical aptasensor has the advantages of simplicity, ease of operation, and high sensitivity and specificity, offering a promising method to assess the safety of dairy products polluted with Hg2+.
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Affiliation(s)
- Xinai Zhang
- School of Food and Biological Engineering , Jiangsu University , Zhenjiang , Jiangsu 212013 , People's Republic of China
| | - Chenyong Huang
- School of Food and Biological Engineering , Jiangsu University , Zhenjiang , Jiangsu 212013 , People's Republic of China
| | - Yanjuan Jiang
- School of Food and Biological Engineering , Jiangsu University , Zhenjiang , Jiangsu 212013 , People's Republic of China
| | - Yuxiang Jiang
- School of Food and Biological Engineering , Jiangsu University , Zhenjiang , Jiangsu 212013 , People's Republic of China
| | - Jianzhong Shen
- School of Food and Biological Engineering , Jiangsu University , Zhenjiang , Jiangsu 212013 , People's Republic of China
| | - En Han
- School of Food and Biological Engineering , Jiangsu University , Zhenjiang , Jiangsu 212013 , People's Republic of China
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Facile Ag-Film Based Surface Enhanced Raman Spectroscopy Using DNA Molecular Switch for Ultra-Sensitive Mercury Ions Detection. NANOMATERIALS 2018; 8:nano8080596. [PMID: 30082591 PMCID: PMC6116212 DOI: 10.3390/nano8080596] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/01/2018] [Revised: 07/29/2018] [Accepted: 08/01/2018] [Indexed: 01/17/2023]
Abstract
Heavy metal pollution has long been the focus of attention because of its serious threat to human health and the environment. Surface enhanced Raman spectroscopy (SERS) has shown great potential for metal detection owing to many advantages, including, requiring fewer samples, its minimal damage to specimen, and its high sensitivity. In this work, we proposed a simple and distinctive method, based on SERS, using facile silver film (Ag-film) combined with a DNA molecular switch, which allowed for the highly specific detection of heavy metal mercury ions (Hg2+). When in the presence of Hg2+ ions, the signals from Raman probes attach to single-stranded DNA, which will be dramatically enhanced due to the specific structural change of DNA strands-resulting from the interaction between Hg2+ ions and DNA bases. This SERS sensor could achieve an ultralow limit of detection (1.35 × 10-15 M) for Hg2+ detection. In addition, we applied this SERS sensor to detect Hg2+ in real blood samples. The results suggested that this SERS platform could be a promising alternative tool for Hg2+ detection in clinical, environmental, and food inspection.
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18
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Schmidt OP, Benz AS, Mata G, Luedtke NW. HgII binds to C-T mismatches with high affinity. Nucleic Acids Res 2018; 46:6470-6479. [PMID: 29901748 PMCID: PMC6061796 DOI: 10.1093/nar/gky499] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2018] [Revised: 05/04/2018] [Accepted: 06/11/2018] [Indexed: 02/07/2023] Open
Abstract
Binding reactions of HgII and AgI to pyrimidine-pyrimidine mismatches in duplex DNA were characterized using fluorescent nucleobase analogs, thermal denaturation and 1H NMR. Unlike AgI, HgII exhibited stoichiometric, site-specific binding of C-T mismatches. The on- and off-rates of HgII binding were approximately 10-fold faster to C-T mismatches (kon ≈ 105 M-1 s-1, koff ≈ 10-3 s-1) as compared to T-T mismatches (kon ≈ 104 M-1 s-1, koff ≈ 10-4 s-1), resulting in very similar equilibrium binding affinities for both types of 'all natural' metallo base pairs (Kd ≈ 10-150 nM). These results are in contrast to thermal denaturation analyses, where duplexes containing T-T mismatches exhibited much larger increases in thermal stability upon addition of HgII (ΔTm = 6-19°C), as compared to those containing C-T mismatches (ΔTm = 1-4°C). In addition to revealing the high thermodynamic and kinetic stabilities of C-HgII-T base pairs, our results demonstrate that fluorescent nucleobase analogs enable highly sensitive detection and characterization of metal-mediated base pairs - even in situations where metal binding has little or no impact on the thermal stability of the duplex.
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Affiliation(s)
- Olivia P Schmidt
- University of Zurich, Department of Chemistry, Zurich, Switzerland
| | - Andrea S Benz
- University of Zurich, Department of Chemistry, Zurich, Switzerland
| | - Guillaume Mata
- University of Zurich, Department of Chemistry, Zurich, Switzerland
| | - Nathan W Luedtke
- University of Zurich, Department of Chemistry, Zurich, Switzerland
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19
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Water-soluble polymer dots formed from polyethylenimine and glutathione as a fluorescent probe for mercury(II). Mikrochim Acta 2018; 185:284. [DOI: 10.1007/s00604-018-2817-3] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2018] [Accepted: 04/24/2018] [Indexed: 11/26/2022]
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20
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Wu SH, Zhang B, Wang FF, Mi ZZ, Sun JJ. Heating enhanced sensitive and selective electrochemical detection of Hg 2+ based on T-Hg 2+ -T structure and exonuclease III-assisted target recycling amplification strategy at heated gold disk electrode. Biosens Bioelectron 2018; 104:145-151. [DOI: 10.1016/j.bios.2018.01.004] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2017] [Revised: 12/15/2017] [Accepted: 01/03/2018] [Indexed: 10/18/2022]
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21
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Wang W, Li X, Hou X, Wang S, Wang F, Luo X. Controlled-Release-Based Ultrasensitive and Highly Selective Turn-On Fluorescent Mercury Biosensor. ChemistrySelect 2017. [DOI: 10.1002/slct.201701704] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Wei Wang
- Key Laboratory of Sensor Analysis of Tumor Marker; Ministry of Education; College of Chemistry and Molecular Engineering; Qingdao University of Science and Technology; Qingdao 266042 P.R. China
| | - Xin Li
- Key Laboratory of Sensor Analysis of Tumor Marker; Ministry of Education; College of Chemistry and Molecular Engineering; Qingdao University of Science and Technology; Qingdao 266042 P.R. China
| | - Xiaoshan Hou
- Key Laboratory of Sensor Analysis of Tumor Marker; Ministry of Education; College of Chemistry and Molecular Engineering; Qingdao University of Science and Technology; Qingdao 266042 P.R. China
| | - Shiying Wang
- Key Laboratory of Sensor Analysis of Tumor Marker; Ministry of Education; College of Chemistry and Molecular Engineering; Qingdao University of Science and Technology; Qingdao 266042 P.R. China
| | - Fengying Wang
- Key Laboratory of Sensor Analysis of Tumor Marker; Ministry of Education; College of Chemistry and Molecular Engineering; Qingdao University of Science and Technology; Qingdao 266042 P.R. China
| | - Xiliang Luo
- Key Laboratory of Sensor Analysis of Tumor Marker; Ministry of Education; College of Chemistry and Molecular Engineering; Qingdao University of Science and Technology; Qingdao 266042 P.R. China
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22
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Hu Y, Cecconello A, Idili A, Ricci F, Willner I. Triplex DNA Nanostructures: From Basic Properties to Applications. Angew Chem Int Ed Engl 2017; 56:15210-15233. [PMID: 28444822 DOI: 10.1002/anie.201701868] [Citation(s) in RCA: 227] [Impact Index Per Article: 32.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2017] [Indexed: 12/16/2022]
Abstract
Triplex nucleic acids have recently attracted interest as part of the rich "toolbox" of structures used to develop DNA-based nanostructures and materials. This Review addresses the use of DNA triplexes to assemble sensing platforms and molecular switches. Furthermore, the pH-induced, switchable assembly and dissociation of triplex-DNA-bridged nanostructures are presented. Specifically, the aggregation/deaggregation of nanoparticles, the reversible oligomerization of origami tiles and DNA circles, and the use of triplex DNA structures as functional units for the assembly of pH-responsive systems and materials are described. Examples include semiconductor-loaded DNA-stabilized microcapsules, DNA-functionalized dye-loaded metal-organic frameworks (MOFs), and the pH-induced release of the loads. Furthermore, the design of stimuli-responsive DNA-based hydrogels undergoing reversible pH-induced hydrogel-to-solution transitions using triplex nucleic acids is introduced, and the use of triplex DNA to assemble shape-memory hydrogels is discussed. An outlook for possible future applications of triplex nucleic acids is also provided.
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Affiliation(s)
- Yuwei Hu
- Institute of Chemistry, The Hebrew University of Jerusalem, Jerusalem, 91904, Israel
| | - Alessandro Cecconello
- Institute of Chemistry, The Hebrew University of Jerusalem, Jerusalem, 91904, Israel
| | - Andrea Idili
- Department of Chemistry, University of Rome, Tor Vergata, via della Ricerca Scientifica, 00133, Rome, Italy
| | - Francesco Ricci
- Department of Chemistry, University of Rome, Tor Vergata, via della Ricerca Scientifica, 00133, Rome, Italy
| | - Itamar Willner
- Institute of Chemistry, The Hebrew University of Jerusalem, Jerusalem, 91904, Israel
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23
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Hu Y, Cecconello A, Idili A, Ricci F, Willner I. Triplex-DNA-Nanostrukturen: von grundlegenden Eigenschaften zu Anwendungen. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201701868] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Yuwei Hu
- Institute of Chemistry; The Hebrew University of Jerusalem; Jerusalem 91904 Israel
| | | | - Andrea Idili
- Department of Chemistry; Universität Rom; Tor Vergata, via della Ricerca Scientifica 00133 Rom Italien
| | - Francesco Ricci
- Department of Chemistry; Universität Rom; Tor Vergata, via della Ricerca Scientifica 00133 Rom Italien
| | - Itamar Willner
- Institute of Chemistry; The Hebrew University of Jerusalem; Jerusalem 91904 Israel
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24
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Organic-inorganic hybrid fluorescent sensor thin films of rhodamine B embedded Ag-SBA15 for selective recognition of Hg (II) ions in water. CHINESE CHEM LETT 2017. [DOI: 10.1016/j.cclet.2017.01.018] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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25
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“Off-On”switching electrochemiluminescence biosensor for mercury(II) detection based on molecular recognition technology. Anal Biochem 2017; 518:46-52. [DOI: 10.1016/j.ab.2016.09.018] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2016] [Revised: 09/19/2016] [Accepted: 09/20/2016] [Indexed: 01/26/2023]
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26
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Lv J, Xie S, Cai W, Zhang J, Tang D, Tang Y. Highly effective target converting strategy for ultrasensitive electrochemical assay of Hg2+. Analyst 2017; 142:4708-4714. [DOI: 10.1039/c7an01306j] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
An electrochemical sensing system based on a highly effective Hg2+ converting strategy and RCA has been developed for the ultrasensitive detection of Hg2+.
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Affiliation(s)
- Jin Lv
- Chongqing Key Laboratory of Environmental Materials and Remediation Technologies (Chongqing University of Arts and Sciences)
- Chongqing University of Arts and Sciences
- Chongqing 402160
- PR China
- College of Chemistry and Chemical Engineering
| | - Shunbi Xie
- Chongqing Key Laboratory of Environmental Materials and Remediation Technologies (Chongqing University of Arts and Sciences)
- Chongqing University of Arts and Sciences
- Chongqing 402160
- PR China
| | - Wei Cai
- Chongqing Key Laboratory of Environmental Materials and Remediation Technologies (Chongqing University of Arts and Sciences)
- Chongqing University of Arts and Sciences
- Chongqing 402160
- PR China
- College of Chemistry and Chemical Engineering
| | - Jin Zhang
- Chongqing Key Laboratory of Environmental Materials and Remediation Technologies (Chongqing University of Arts and Sciences)
- Chongqing University of Arts and Sciences
- Chongqing 402160
- PR China
- College of Chemistry and Chemical Engineering
| | - Dianyong Tang
- Chongqing Key Laboratory of Environmental Materials and Remediation Technologies (Chongqing University of Arts and Sciences)
- Chongqing University of Arts and Sciences
- Chongqing 402160
- PR China
| | - Ying Tang
- Chongqing Key Laboratory of Environmental Materials and Remediation Technologies (Chongqing University of Arts and Sciences)
- Chongqing University of Arts and Sciences
- Chongqing 402160
- PR China
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27
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Exploratory review on safety of edible raw fish per the hazard factors and their detection methods. Trends Food Sci Technol 2017. [DOI: 10.1016/j.tifs.2016.11.004] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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28
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Pandeeswar M, Senanayak SP, Govindaraju T. Nanoarchitectonics of Small Molecule and DNA for Ultrasensitive Detection of Mercury. ACS APPLIED MATERIALS & INTERFACES 2016; 8:30362-30371. [PMID: 27753489 DOI: 10.1021/acsami.6b10527] [Citation(s) in RCA: 60] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Reliable and ultrasensitive detection of mercury ions is of paramount importance for toxicology assessment, environmental protection, and human health. Herein, we present a novel optoelectronic approach based on nanoarchitectonics of small-molecule templated DNA system that consists of an adenine (A)-conjugated small organic semiconductor (BNA) and deoxyribo-oligothymidine (dTn). This mutually templated dynamic chiral coassembly system (BNAn-dTn) with tunable chiroptical, morphological, and electrical properties is tapped in to enable ultrasensitive and selective detection of inorganic and organometallic mercury in water. We observe a rapid transformation of the BNAn-dTn coassembly into a metallo-DNA duplex [dT-Hg-dT]n in the presence of mercury, which is utilized for a chiro-optical and conductivity-based rapid and subnanomolar sensitivity (≥0.1 nM, 0.02 ppb) to mercury ions in water (∼100 times lower than United States Environmental Protection Agency tolerance limit). This ultrasensitive detection of inorganic and organometallic mercury is driven by a novel chemical design principle that allows strong mercury thymine interaction. This study is anticipated to inspire the development of future templated DNA nanotechnology-based optoelectronic devices for the rapid and ultrasensitive detection of numerous other toxic analytes.
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Affiliation(s)
- M Pandeeswar
- Bioorganic Chemistry Laboratory, New Chemistry Unit and ‡Molecular Electronics Lab, Chemistry and Physics of Materials Unit, Jawaharlal Nehru Centre for Advanced Scientific Research , Jakkur P.O., Bengaluru 560064, Karnataka, India
| | - Satyaprasad P Senanayak
- Bioorganic Chemistry Laboratory, New Chemistry Unit and ‡Molecular Electronics Lab, Chemistry and Physics of Materials Unit, Jawaharlal Nehru Centre for Advanced Scientific Research , Jakkur P.O., Bengaluru 560064, Karnataka, India
| | - T Govindaraju
- Bioorganic Chemistry Laboratory, New Chemistry Unit and ‡Molecular Electronics Lab, Chemistry and Physics of Materials Unit, Jawaharlal Nehru Centre for Advanced Scientific Research , Jakkur P.O., Bengaluru 560064, Karnataka, India
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29
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Schmidt OP, Mata G, Luedtke NW. Fluorescent Base Analogue Reveals T-HgII-T Base Pairs Have High Kinetic Stabilities That Perturb DNA Metabolism. J Am Chem Soc 2016; 138:14733-14739. [DOI: 10.1021/jacs.6b09044] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- Olivia P. Schmidt
- Department of Chemistry, University of Zürich, Winterthurerstrasse 190, CH-8057 Zürich, Switzerland
| | - Guillaume Mata
- Department of Chemistry, University of Zürich, Winterthurerstrasse 190, CH-8057 Zürich, Switzerland
| | - Nathan W. Luedtke
- Department of Chemistry, University of Zürich, Winterthurerstrasse 190, CH-8057 Zürich, Switzerland
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30
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Pandey GP, Singh AK, Prasad S, Deshmukh L, Asthana A, Mathew SB, Yoshida M. Kinetic determination of trace amount of mercury(II) in environmental samples. Microchem J 2016. [DOI: 10.1016/j.microc.2016.03.003] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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31
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Cai L, Guo Z, Zheng X. Electrochemiluminescent detection of Hg(II) by exploiting the differences in the adsorption of free T-rich oligomers and Hg(II) loaded T-rich oligomers on silica nanoparticles doped with Ru(bpy)3 2+. Mikrochim Acta 2016. [DOI: 10.1007/s00604-016-1875-7] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
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32
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D-penicillamine-templated copper nanoparticles via ascorbic acid reduction as a mercury ion sensor. Talanta 2016; 151:106-113. [DOI: 10.1016/j.talanta.2016.01.028] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2015] [Revised: 01/11/2016] [Accepted: 01/14/2016] [Indexed: 11/17/2022]
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33
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DNA-based electrochemical determination of mercury(II) by exploiting the catalytic formation of gold amalgam and of silver nanoparticles. Mikrochim Acta 2016. [DOI: 10.1007/s00604-016-1813-8] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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34
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Wang L, Sun Y, Li Z, Wu A, Wei G. Bottom-Up Synthesis and Sensor Applications of Biomimetic Nanostructures. MATERIALS (BASEL, SWITZERLAND) 2016; 9:E53. [PMID: 28787853 PMCID: PMC5456561 DOI: 10.3390/ma9010053] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/25/2015] [Revised: 01/05/2016] [Accepted: 01/07/2016] [Indexed: 12/21/2022]
Abstract
The combination of nanotechnology, biology, and bioengineering greatly improved the developments of nanomaterials with unique functions and properties. Biomolecules as the nanoscale building blocks play very important roles for the final formation of functional nanostructures. Many kinds of novel nanostructures have been created by using the bioinspired self-assembly and subsequent binding with various nanoparticles. In this review, we summarized the studies on the fabrications and sensor applications of biomimetic nanostructures. The strategies for creating different bottom-up nanostructures by using biomolecules like DNA, protein, peptide, and virus, as well as microorganisms like bacteria and plant leaf are introduced. In addition, the potential applications of the synthesized biomimetic nanostructures for colorimetry, fluorescence, surface plasmon resonance, surface-enhanced Raman scattering, electrical resistance, electrochemistry, and quartz crystal microbalance sensors are presented. This review will promote the understanding of relationships between biomolecules/microorganisms and functional nanomaterials in one way, and in another way it will guide the design and synthesis of biomimetic nanomaterials with unique properties in the future.
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Affiliation(s)
- Li Wang
- College of Chemistry, Jilin Normal University, Haifeng Street 1301, Siping 136000, China.
| | - Yujing Sun
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Renmin Street 5625, Changchun 130022, China.
| | - Zhuang Li
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Renmin Street 5625, Changchun 130022, China.
| | - Aiguo Wu
- Key Laboratory of Magnetic Materials and Devices & Division of Functional Materials and Nanodevices, Ningbo Institute of Material Technology and Engineering, Chinese Academy Sciences, Ningbo 315201, China.
| | - Gang Wei
- Faculty of Production Engineering, University of Bremen, Am Fallturm 1, D-28359 Bremen, Germany.
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35
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Bao T, Wen W, Shu L, Zhang X, Wang S. Label-free and dual-amplified electrochemical detection of Hg2+ based on self-assembled DNA nanostructures and target-triggered exonuclease cleavage activity. NEW J CHEM 2016. [DOI: 10.1039/c6nj00265j] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
An electrochemical biosensor for Hg2+ detection via HCR and Hg2+-triggered Exo III-assisted target recycling for signal amplification.
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Affiliation(s)
- Ting Bao
- 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 430062
- P. R. China
| | - Wei Wen
- 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 430062
- P. R. China
| | - Lei Shu
- 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 430062
- P. R. China
| | - Xiuhua Zhang
- 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 430062
- P. R. China
| | - Shengfu Wang
- 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 430062
- P. R. China
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36
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Triple functional DNA–protein conjugates: Signal probes for Pb2+ using evanescent wave-induced emission. Biosens Bioelectron 2015; 74:78-84. [DOI: 10.1016/j.bios.2015.06.003] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2015] [Revised: 06/01/2015] [Accepted: 06/02/2015] [Indexed: 12/24/2022]
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37
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Cui L, Wu J, Li M, Ju H. Highly sensitive electrochemical detection of mercury (II) via single ion-induced three-way junction of DNA. Electrochem commun 2015. [DOI: 10.1016/j.elecom.2015.07.012] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
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38
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Han Y, Chabu JM, Hu S, Deng L, Liu YN, Guo S. Rational Tuning of the Electrocatalytic Nanobiointerface for a “Turn-Off” Biofuel-Cell-Based Self-Powered Biosensor for p53 Protein. Chemistry 2015. [DOI: 10.1002/chem.201502062] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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39
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Zhu Y, Jiang X, Wang H, Wang S, Wang H, Sun B, Su Y, He Y. A Poly Adenine-Mediated Assembly Strategy for Designing Surface-Enhanced Resonance Raman Scattering Substrates in Controllable Manners. Anal Chem 2015; 87:6631-8. [DOI: 10.1021/acs.analchem.5b00676] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Ying Zhu
- Institute of Functional Nano & Soft Materials (FUNSOM) and Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou, Jiangsu 215123, China
| | - Xiangxu Jiang
- Institute of Functional Nano & Soft Materials (FUNSOM) and Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou, Jiangsu 215123, China
| | - Houyu Wang
- Institute of Functional Nano & Soft Materials (FUNSOM) and Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou, Jiangsu 215123, China
| | - Siyi Wang
- Institute of Functional Nano & Soft Materials (FUNSOM) and Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou, Jiangsu 215123, China
| | - Hui Wang
- Institute of Functional Nano & Soft Materials (FUNSOM) and Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou, Jiangsu 215123, China
| | - Bin Sun
- Institute of Functional Nano & Soft Materials (FUNSOM) and Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou, Jiangsu 215123, China
| | - Yuanyuan Su
- Institute of Functional Nano & Soft Materials (FUNSOM) and Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou, Jiangsu 215123, China
| | - Yao He
- Institute of Functional Nano & Soft Materials (FUNSOM) and Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou, Jiangsu 215123, China
- Department
of Chemistry, Stanford University, Stanford, California 94305, United States
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40
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Zhang S, Li H, Wang Z, Liu J, Zhang H, Wang B, Yang Z. A strongly coupled Au/Fe3O4/GO hybrid material with enhanced nanozyme activity for highly sensitive colorimetric detection, and rapid and efficient removal of Hg(2+) in aqueous solutions. NANOSCALE 2015; 7:8495-502. [PMID: 25896803 DOI: 10.1039/c5nr00527b] [Citation(s) in RCA: 81] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
We have developed an efficient strategy for synthesizing a strongly coupled Au/Fe3O4/GO hybrid material to improve the catalytic activity, stability, and separation capability of Au nanoparticles (NPs) and Hg(2+). The hybrid material can be synthesized by the direct anchoring of Au and Fe3O4 NPs on the functional groups of GO. This approach affords strong chemical attachments between the NPs and GO, allowing this hybrid material to ultrasensitively detect Hg(2+) in aqueous solutions with a detection limit as low as 0.15 nM. In addition, the deposition of Hg(0) on the surface of Au/Fe3O4/GO could be quickly (within 30 min) and efficiently (>99% elimination efficiency) removed by the simple application of an external magnetic field and then Au/Fe3O4/GO could be subsequently reused at least 15 times, with the elimination efficiency remaining high (>96%).
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Affiliation(s)
- Shouting Zhang
- Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, State Key Laboratory of Applied Organic Chemistry, and Key Laboratory of Special Function Materials and Structure Design, Ministry of Education, Lanzhou University Gansu, Lanzhou, 730000, People's Republic of China.
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41
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March G, Nguyen TD, Piro B. Modified electrodes used for electrochemical detection of metal ions in environmental analysis. BIOSENSORS-BASEL 2015; 5:241-75. [PMID: 25938789 PMCID: PMC4493548 DOI: 10.3390/bios5020241] [Citation(s) in RCA: 144] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/30/2014] [Revised: 04/14/2015] [Accepted: 04/22/2015] [Indexed: 01/16/2023]
Abstract
Heavy metal pollution is one of the most serious environmental problems, and regulations are becoming stricter. Many efforts have been made to develop sensors for monitoring heavy metals in the environment. This review aims at presenting the different label-free strategies used to develop electrochemical sensors for the detection of heavy metals such as lead, cadmium, mercury, arsenic etc. The first part of this review will be dedicated to stripping voltammetry techniques, on unmodified electrodes (mercury, bismuth or noble metals in the bulk form), or electrodes modified at their surface by nanoparticles, nanostructures (CNT, graphene) or other innovative materials such as boron-doped diamond. The second part will be dedicated to chemically modified electrodes especially those with conducting polymers. The last part of this review will focus on bio-modified electrodes. Special attention will be paid to strategies using biomolecules (DNA, peptide or proteins), enzymes or whole cells.
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Affiliation(s)
| | - Tuan Dung Nguyen
- Institute for Tropical Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay District, Hanoi, Vietnam.
| | - Benoit Piro
- Chemistry Department, University Paris Diderot, Sorbonne Paris Cité, ITODYS, UMR 7086 CNRS, 15 rue J-A de Baïf, 75205 Paris Cedex 13, France.
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42
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Huang Q, Wang X, Zheng L. A new method to fabricate an electrochemical aptasensor to assay adenosine deaminase concentration using an assistance DNA. J Immunoassay Immunochem 2015; 35:344-51. [PMID: 24624989 DOI: 10.1080/15321819.2014.899255] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
A novel strategy for the fabrication of electrochemical aptasensor is proposed in this work. This strategy has been employed to develop an aptasensor for the detection of adenosine deaminase concentration. A probe which contains adenosine aptamer and modified with ferrocene is adopted in our strategy as the core element. Moreover, an assistance DNA which can hybridize with the probe was also been employed in our strategy. The enzymatic reaction of adenosine catalyzed by adenosine deaminase plays a key role as well in the regulation of the hybridized complex. The formation of these regions of rigid, duplex DNA prevents the ferrocene tag from approaching the electrode surface, suppressing amperometric currents. The electroactive probe is to reflect the concentration of the enzyme indirectly but accurately. The detection limit is 1 U L(-1), which can be acceptable for clinical applications.
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Affiliation(s)
- Qing Huang
- a Department of Emergency , Nanjing Medical University, Affiliated Wuxi People's Hospital , Wuxi , Jiangsu , China
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43
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Yetisen AK, Montelongo Y, Qasim MM, Butt H, Wilkinson TD, Monteiro MJ, Yun SH. Photonic Nanosensor for Colorimetric Detection of Metal Ions. Anal Chem 2015; 87:5101-8. [DOI: 10.1021/ac504274q] [Citation(s) in RCA: 73] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Ali K. Yetisen
- Harvard Medical School and Wellman Center for Photomedicine, Massachusetts General Hospital, 50
Blossom Street, Boston, Massachusetts 02114, United States
| | - Yunuen Montelongo
- Centre
of Molecular
Materials for Photonics and Electronics, Department of
Engineering, University of Cambridge, 9 JJ Thomson Avenue, Cambridge CB3 0FA, United Kingdom
| | - Malik M. Qasim
- Centre
of Molecular
Materials for Photonics and Electronics, Department of
Engineering, University of Cambridge, 9 JJ Thomson Avenue, Cambridge CB3 0FA, United Kingdom
| | - Haider Butt
- School
of Mechanical Engineering, University of Birmingham, Edgbaston, Birmingham B15 2TT, United Kingdom
| | - Timothy D. Wilkinson
- Centre
of Molecular
Materials for Photonics and Electronics, Department of
Engineering, University of Cambridge, 9 JJ Thomson Avenue, Cambridge CB3 0FA, United Kingdom
| | - Michael J. Monteiro
- Australian
Institute for Bioengineering and Nanotechnology, University of Queensland, Brisbane, Queensland 4072, Australia
| | - Seok Hyun Yun
- Harvard Medical School and Wellman Center for Photomedicine, Massachusetts General Hospital, 50
Blossom Street, Boston, Massachusetts 02114, United States
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44
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Zhang Y, Zeng GM, Tang L, Chen J, Zhu Y, He XX, He Y. Electrochemical Sensor Based on Electrodeposited Graphene-Au Modified Electrode and NanoAu Carrier Amplified Signal Strategy for Attomolar Mercury Detection. Anal Chem 2015; 87:989-96. [DOI: 10.1021/ac503472p] [Citation(s) in RCA: 237] [Impact Index Per Article: 26.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Yi Zhang
- College
of Environmental Science and Engineering, Hunan University, Changsha, Hunan 410082, People’s Republic of China
- Key
Laboratory of Environmental Biology and Pollution Control of Ministry
of Education, Hunan University, Changsha, Hunan 410082, People’s Republic of China
| | - Guang Ming Zeng
- College
of Environmental Science and Engineering, Hunan University, Changsha, Hunan 410082, People’s Republic of China
- Key
Laboratory of Environmental Biology and Pollution Control of Ministry
of Education, Hunan University, Changsha, Hunan 410082, People’s Republic of China
| | - Lin Tang
- College
of Environmental Science and Engineering, Hunan University, Changsha, Hunan 410082, People’s Republic of China
- Key
Laboratory of Environmental Biology and Pollution Control of Ministry
of Education, Hunan University, Changsha, Hunan 410082, People’s Republic of China
| | - Jun Chen
- College
of Environmental Science and Engineering, Hunan University, Changsha, Hunan 410082, People’s Republic of China
- Key
Laboratory of Environmental Biology and Pollution Control of Ministry
of Education, Hunan University, Changsha, Hunan 410082, People’s Republic of China
| | - Yuan Zhu
- College
of Environmental Science and Engineering, Hunan University, Changsha, Hunan 410082, People’s Republic of China
- Key
Laboratory of Environmental Biology and Pollution Control of Ministry
of Education, Hunan University, Changsha, Hunan 410082, People’s Republic of China
| | - Xiao Xiao He
- College
of Environmental Science and Engineering, Hunan University, Changsha, Hunan 410082, People’s Republic of China
- Key
Laboratory of Environmental Biology and Pollution Control of Ministry
of Education, Hunan University, Changsha, Hunan 410082, People’s Republic of China
| | - Yan He
- College
of Environmental Science and Engineering, Hunan University, Changsha, Hunan 410082, People’s Republic of China
- Key
Laboratory of Environmental Biology and Pollution Control of Ministry
of Education, Hunan University, Changsha, Hunan 410082, People’s Republic of China
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45
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Zhang K, Wang K, Zhu X, Xie M. Sensitive and selective amplified detection of silver ion based on NEase-aided target recycling. RSC Adv 2015. [DOI: 10.1039/c5ra12544h] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A new Ag+ detection strategy that can be devised utilizing the advantages of both the nicking endonuclease-assisted signaling amplification (NEASA) method and the label-free architecture of G-quadruplex–hemin complex is reported.
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Affiliation(s)
- Kai Zhang
- Key Laboratory of Nuclear Medicine
- Ministry of Health
- Jiangsu Key Laboratory of Molecular Nuclear Medicine
- Jiangsu Institute of Nuclear Medicine
- Wuxi
| | - Ke Wang
- Key Laboratory of Nuclear Medicine
- Ministry of Health
- Jiangsu Key Laboratory of Molecular Nuclear Medicine
- Jiangsu Institute of Nuclear Medicine
- Wuxi
| | - Xue Zhu
- Key Laboratory of Nuclear Medicine
- Ministry of Health
- Jiangsu Key Laboratory of Molecular Nuclear Medicine
- Jiangsu Institute of Nuclear Medicine
- Wuxi
| | - Minhao Xie
- Key Laboratory of Nuclear Medicine
- Ministry of Health
- Jiangsu Key Laboratory of Molecular Nuclear Medicine
- Jiangsu Institute of Nuclear Medicine
- Wuxi
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46
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Tanaka Y, Kondo J, Sychrovský V, Šebera J, Dairaku T, Saneyoshi H, Urata H, Torigoe H, Ono A. Structures, physicochemical properties, and applications of T–HgII–T, C–AgI–C, and other metallo-base-pairs. Chem Commun (Camb) 2015; 51:17343-60. [DOI: 10.1039/c5cc02693h] [Citation(s) in RCA: 118] [Impact Index Per Article: 13.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
In this feature article, recent progress and future perspectives of metal-mediated base-pairs such as T–Hg(ii)–T and C–Ag(i)–C are presented.
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Affiliation(s)
- Yoshiyuki Tanaka
- Faculty of Pharmaceutical Sciences
- Tokushima Bunri University
- Tokushima
- Japan
- Graduate School of Pharmaceutical Sciences
| | - Jiro Kondo
- Department of Materials and Life Sciences
- Faculty of Science and Technology
- Sophia University
- Chiyoda-ku
- Japan
| | - Vladimír Sychrovský
- Institute of Organic Chemistry and Biochemistry
- Academy of Sciences of the Czech Republic
- Praha 6
- Czech Republic
| | - Jakub Šebera
- Institute of Organic Chemistry and Biochemistry
- Academy of Sciences of the Czech Republic
- Praha 6
- Czech Republic
- Institute of Physics
| | - Takenori Dairaku
- Graduate School of Pharmaceutical Sciences
- Tohoku University
- Sendai
- Japan
| | - Hisao Saneyoshi
- Department of Material & Life Chemistry
- Kanagawa University
- Yokohama
- Japan
| | - Hidehito Urata
- Osaka University of Pharmaceutical Sciences
- Takatsuki
- Japan
| | - Hidetaka Torigoe
- Department of Applied Chemistry
- Faculty of Science
- Tokyo University of Science
- Shinjuku-ku
- Japan
| | - Akira Ono
- Department of Material & Life Chemistry
- Kanagawa University
- Yokohama
- Japan
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47
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Xu H, Zhu X, Ye H, Yu L, Chen G, Chi Y, Liu X. A bio-inspired sensor coupled with a bio-bar code and hybridization chain reaction for Hg2+ assay. Chem Commun (Camb) 2015; 51:15031-4. [DOI: 10.1039/c5cc05369b] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
In this article, a bio-inspired DNA sensor is developed, which coupled with bio-bar code and hybridization chain reaction. This bio-inspired sensor has high sensitivity to Hg2+, and has been used to assay Hg2+ in the extraction of traditional Chinese medicine.
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Affiliation(s)
- Huifeng Xu
- Academy of Integrative Medicine
- Fujian University of Traditional Chinese Medicine
- Fuzhou
- P. R. China
- Ministry of Education Key Laboratory of Analysis and Detection for Food Safety
| | - Xi Zhu
- College of Life Sciences
- Fujian Agriculture and Forestry University
- Fuzhou
- China
| | - Hongzhi Ye
- Academy of Integrative Medicine
- Fujian University of Traditional Chinese Medicine
- Fuzhou
- P. R. China
| | - Lishuang Yu
- Academy of Integrative Medicine
- Fujian University of Traditional Chinese Medicine
- Fuzhou
- P. R. China
| | - Guonan Chen
- Ministry of Education Key Laboratory of Analysis and Detection for Food Safety
- Fujian Provincial Key Laboratory of Analysis and Detection for Food Safety
- Department of Chemistry
- Fuzhou University
- Fuzhou
| | - Yuwu Chi
- Ministry of Education Key Laboratory of Analysis and Detection for Food Safety
- Fujian Provincial Key Laboratory of Analysis and Detection for Food Safety
- Department of Chemistry
- Fuzhou University
- Fuzhou
| | - Xianxiang Liu
- Academy of Integrative Medicine
- Fujian University of Traditional Chinese Medicine
- Fuzhou
- P. R. China
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48
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Electrochemical sensing of heavy metal ions with inorganic, organic and bio-materials. Biosens Bioelectron 2015; 63:276-286. [DOI: 10.1016/j.bios.2014.07.052] [Citation(s) in RCA: 368] [Impact Index Per Article: 40.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2014] [Revised: 07/04/2014] [Accepted: 07/15/2014] [Indexed: 01/31/2023]
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49
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Gupta A, Chaudhary A, Mehta P, Dwivedi C, Khan S, Verma NC, Nandi CK. Nitrogen-doped, thiol-functionalized carbon dots for ultrasensitive Hg(ii) detection. Chem Commun (Camb) 2015; 51:10750-3. [DOI: 10.1039/c5cc03019f] [Citation(s) in RCA: 106] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Nitrogen-doped, PEGylated carbon dots (C-dots) have been synthesized for the ultra sensitive detection of mercury ions (Hg2+).
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Affiliation(s)
- Abhishek Gupta
- School of Basic Sciences
- Indian Institute of Technology
- Mandi
- India
| | | | - Pooja Mehta
- School of Basic Sciences
- Indian Institute of Technology
- Mandi
- India
| | - Charu Dwivedi
- School of Basic Sciences
- Indian Institute of Technology
- Mandi
- India
| | - Syamantak Khan
- School of Basic Sciences
- Indian Institute of Technology
- Mandi
- India
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50
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Mashhadizadeh MH, Talemi RP. A novel optical DNA biosensor for detection of trace amounts of mercuric ions using gold nanoparticles introduced onto modified glass surface. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2014; 132:403-409. [PMID: 24887502 DOI: 10.1016/j.saa.2014.04.146] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/01/2014] [Revised: 04/22/2014] [Accepted: 04/23/2014] [Indexed: 06/03/2023]
Abstract
In this work we report a DNA spectrophotometric biosensor for detection of Hg2+ ions in which a pair of oligonucleotides with four thymine-thymine (T-T) mismatched bases was immobilized onto modified glass surface. Firstly, glass surface modified with 3-(mercaptopropyl) trimethoxysilane (MSPT) and gold nano-particles respectively and then one oligonucleotide (P1) modified with hexanthiol at 5-terminal was immobilized on gold nano-particles via self-assembly and inserted in methylene blue. Methylene blue can intercalate on single strand DNA (ss-DNA) and its absorption peak can measure spectrophotometrically. Then the other oligonucleotide was able to hybridize with P1 by forming thymine-Hg2+-thymine (T-Hg2+-T) complexes in the presence of Hg2+, and absorption signal of methylene blue reduced upon Hg2+ increasing concentration because inaccessibility of guanine base in DNA duplex. However, when Hg2+ was absent, the two oligonucleotides could not hybridize due to the T-T mismatched bases, and P2 could not be fixed on the modified glass surface and any change in absorption peak of methylene blue takes place. The UV-Vis spectrum showed a linear correlation between the absorption peak of methylene blue and the concentration of Hg2+ over the range from 10 nM to 10 μM (R2=0.9985) with a detection limit of 6 nM. This spectrophotometric biosensor could be widely used for selective detection of Hg2+.
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