1
|
Jiang N, Zhang C, Ge L, Huang S, Chen X. Unique three-dimensional ordered macroporous dealloyed gold-silver electrochemical sensing platforms for ultrasensitive mercury(II) monitoring. Analyst 2024; 149:1141-1150. [PMID: 38226552 DOI: 10.1039/d3an02075d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2024]
Abstract
To address the requirement of ultra-sensitive detection of trace mercury(II) (Hg2+) ions in the environment and food, we developed an electrochemical biosensor with super-sensitivity, extremely high selectivity, and reusability. This biosensor comprised two signal amplification components: a three-dimensional macroporous dealloyed (3DOMD) Au-Ag thin-film electrode and a multifunctional encoded Au@Pt nanocage (APNC). As a platform for immobilized capture DNA (cDNA), a 3DOMD Au-Ag thin film prepared by a dealloying method with an active surface area 4.8 times higher than that of 3D macroporous gold films generated by cyclic voltammetry (CV) with sulfuric acid was capable of increasing the sensing surface area while also strengthening the electron transport capacity of the sensing substrate due to its multilayered multi-porous framework. In the presence of Hg2+, probe DNA (pDNA) could be hybridized with the mismatched capture DNA (cDNA) through stable thymine-Hg2+-thymine (T-Hg2+-T) linkages, connecting thionine-APNC to the electrode surface and utilizing the large specific surface area to accomplish highly sensitive detection of Hg2+. With an extremely low Hg2+ detection limit of 2 pM and a detection range from 0.01 to 1000 nM, this technique opened up a new avenue for the ultrasensitive detection of a wider range of heavy metal ions or biomolecules.
Collapse
Affiliation(s)
- Nan Jiang
- College of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, PR China.
| | - Chengzhou Zhang
- College of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, PR China.
| | - Lingna Ge
- College of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, PR China.
| | - Shan Huang
- College of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, PR China.
| | - Xiaojun Chen
- College of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, PR China.
| |
Collapse
|
2
|
Kavitha V, Ramya M, Viswanathamurthi P, Haribabu J, Echeverria C. Design of a dual responsive receptor with oxochromane hydrazide moiety to monitor toxic Hg 2+ and Cd 2+ ions: Usage on real samples and live cells. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2022; 301:119036. [PMID: 35202765 DOI: 10.1016/j.envpol.2022.119036] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/01/2021] [Revised: 02/10/2022] [Accepted: 02/17/2022] [Indexed: 06/14/2023]
Abstract
In this work, we report a facile receptor OMB [N',N"'-(3-((4-oxochroman-3-yl)methylene)pentane-2,4- diylidene)bis(4-methoxybenzohydrazide)] for the simultaneous detection of toxic analytes (Hg2+ and Cd2+ ions) in environment and biological samples. The receptor OMB exhibits an excellent selectivity and sensitivity which was determined using absorption and emission spectra. The receptor OMB shows rapid detection with lowest LOD (0.62 nM for Hg2+ ions and 0.77 nM for Cd2+ ions) and LOQ (2.08 nM for Hg2+ ions and 2.57 nM for Cd2+ ions) values. In addition, the receptor OMB exhibits 1:1 binding stoichiometry towards Hg2+ and Cd2+ ions with binding constant values of 5.5 × 106 M-1 and 4.6 × 106 M-1. Moreover, the synthesized receptor OMB possess ability to detect these analytes (Hg2+ and Cd2+ ions) in realistic samples (food and water) which was recognized using photoluminescence spectroscopy technique. In addition, the receptor OMB is also utilized to detect both the analytes in live HeLa cells. Thus, the overall results indicate that the receptor OMB was more suitable to detect the toxic analytes (Hg2+ and Cd2+ ions) present in the environment.
Collapse
Affiliation(s)
| | - Mari Ramya
- Department of Chemistry, Periyar University, Salem, 636 011, Tamil Nadu, India
| | | | - Jebiti Haribabu
- Facultad de Medicina, Universidad de Atacama, Los Carreras 1579, 1532502, Copiapo, Chile
| | - Cesar Echeverria
- Facultad de Medicina, Universidad de Atacama, Los Carreras 1579, 1532502, Copiapo, Chile
| |
Collapse
|
3
|
Labadi Z, Kalas B, Saftics A, Illes L, Jankovics H, Bereczk-Tompa É, Sebestyén A, Tóth É, Kakasi B, Moldovan C, Firtat B, Gartner M, Gheorghe M, Vonderviszt F, Fried M, Petrik P. Sensing Layer for Ni Detection in Water Created by Immobilization of Bioengineered Flagellar Nanotubes on Gold Surfaces. ACS Biomater Sci Eng 2020; 6:3811-3820. [PMID: 33463317 DOI: 10.1021/acsbiomaterials.0c00280] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
The environmental monitoring of Ni is targeted at a threshold limit value of 0.34 μM, as set by the World Health Organization. This sensitivity target can usually only be met by time-consuming and expensive laboratory measurements. There is a need for inexpensive, field-applicable methods, even if they are only used for signaling the necessity of a more accurate laboratory investigation. In this work, bioengineered, protein-based sensing layers were developed for Ni detection in water. Two bacterial Ni-binding flagellin variants were fabricated using genetic engineering, and their applicability as Ni-sensitive biochip coatings was tested. Nanotubes of mutant flagellins were built by in vitro polymerization. A large surface density of the nanotubes on the sensor surface was achieved by covalent immobilization chemistry based on a dithiobis(succimidyl propionate) cross-linking method. The formation and density of the sensing layer was monitored and verified by spectroscopic ellipsometry and atomic force microscopy. Cyclic voltammetry (CV) measurements revealed a Ni sensitivity below 1 μM. It was also shown that, even after two months of storage, the used sensors can be regenerated and reused by rinsing in a 10 mM solution of ethylenediaminetetraacetic acid at room temperature.
Collapse
Affiliation(s)
- Zoltan Labadi
- Institute of Technical Physics and Materials Science, Centre for Energy Research, Budapest 1121, Hungary
| | - Benjamin Kalas
- Institute of Technical Physics and Materials Science, Centre for Energy Research, Budapest 1121, Hungary
| | - Andras Saftics
- Institute of Technical Physics and Materials Science, Centre for Energy Research, Budapest 1121, Hungary
| | - Levente Illes
- Institute of Technical Physics and Materials Science, Centre for Energy Research, Budapest 1121, Hungary
| | - Hajnalka Jankovics
- Research Institute of Biomolecular and Chemical Engineering, University of Pannonia, Veszprém 8200, Hungary
| | - Éva Bereczk-Tompa
- Research Institute of Biomolecular and Chemical Engineering, University of Pannonia, Veszprém 8200, Hungary
| | - Anett Sebestyén
- Research Institute of Biomolecular and Chemical Engineering, University of Pannonia, Veszprém 8200, Hungary
| | - Éva Tóth
- Research Institute of Biomolecular and Chemical Engineering, University of Pannonia, Veszprém 8200, Hungary
| | - Balázs Kakasi
- Research Institute of Biomolecular and Chemical Engineering, University of Pannonia, Veszprém 8200, Hungary
| | - Carmen Moldovan
- National Institute for Research & Development in Microtechnologies, Bucharest 077190, Romania
| | - Bogdan Firtat
- National Institute for Research & Development in Microtechnologies, Bucharest 077190, Romania
| | - Mariuca Gartner
- "Ilie Murgulescu" Institute of Physical Chemistry of the Romanian Academy, Bucharest 060021, Romania
| | | | - Ferenc Vonderviszt
- Institute of Technical Physics and Materials Science, Centre for Energy Research, Budapest 1121, Hungary.,Research Institute of Biomolecular and Chemical Engineering, University of Pannonia, Veszprém 8200, Hungary
| | - Miklos Fried
- Institute of Technical Physics and Materials Science, Centre for Energy Research, Budapest 1121, Hungary.,Institute of Microelectronics and Technology, Óbuda University, Budapest 1034, Hungary
| | - Peter Petrik
- Institute of Technical Physics and Materials Science, Centre for Energy Research, Budapest 1121, Hungary
| |
Collapse
|
4
|
Wang T, Liu Z, Xu X, Zhu J, Zhang G, Jin W. Insights into the design of nineteen-channel perovskite hollow fiber membrane and its oxygen transport behaviour. J Memb Sci 2020. [DOI: 10.1016/j.memsci.2019.117600] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
5
|
Liu T, Chu Z, Jin W. Electrochemical mercury biosensors based on advanced nanomaterials. J Mater Chem B 2019. [DOI: 10.1039/c9tb00418a] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
This review presents an overview of the synthesis strategies and electrochemical performance of recently developed nanomaterials for the Hg2+ assay.
Collapse
Affiliation(s)
- Tao Liu
- State Key Laboratory of Material-Oriented Chemical Engineering
- College of Chemical Engineering
- Nanjing Tech University
- Nanjing 210009
- P. R. China
| | - Zhenyu Chu
- State Key Laboratory of Material-Oriented Chemical Engineering
- College of Chemical Engineering
- Nanjing Tech University
- Nanjing 210009
- P. R. China
| | - Wanqin Jin
- State Key Laboratory of Material-Oriented Chemical Engineering
- College of Chemical Engineering
- Nanjing Tech University
- Nanjing 210009
- P. R. China
| |
Collapse
|
6
|
Velempini T, Pillay K, Mbianda XY, Arotiba OA. Application of a Polypyrrole/Carboxy Methyl Cellulose Ion Imprinted Polymer in the Electrochemical Detection of Mercury in Water. ELECTROANAL 2018. [DOI: 10.1002/elan.201800445] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Tarisai Velempini
- Department of Applied Chemistry; University of Johannesburg; South Africa
| | - Kriveshini Pillay
- Department of Applied Chemistry; University of Johannesburg; South Africa
| | - Xavier Y. Mbianda
- Department of Applied Chemistry; University of Johannesburg; South Africa
| | - Omotayo A. Arotiba
- Department of Applied Chemistry; University of Johannesburg; South Africa
- Centre for Nanomaterials Science Research; University of Johannesburg; South Africa
| |
Collapse
|
7
|
Li H, Chen Q, Hassan MM, Ouyang Q, Jiao T, Xu Y, Chen M. AuNS@Ag core-shell nanocubes grafted with rhodamine for concurrent metal-enhanced fluorescence and surfaced enhanced Raman determination of mercury ions. Anal Chim Acta 2018; 1018:94-103. [PMID: 29605140 DOI: 10.1016/j.aca.2018.01.050] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2017] [Revised: 01/28/2018] [Accepted: 01/30/2018] [Indexed: 12/26/2022]
Abstract
Mercury ion (Hg2+) is a highly hazardous and widespread pollutant with bio-accumulative properties. Although the existing Hg2+ detection methods have high sensitivity and reliability, whereas there have few reports concerning bimodal detection for Hg2+ with one sensor. Toward this goal, a novel sensor based on rhodamine derivatives (RhD) grafted AuNS@Ag core-shell nanocubes (CSN) has been synthesized and shown the bimodal detection capabilities with metal enhanced fluorescence (MEF) and surface enhanced Raman scattering (SERS) for Hg2+. Herein, resultant CSN acts as the signal enhancing material; RhD was modified on the outside of the shell to ensure the signal sensitive of the CSN-RhD hybrids. In this work, we investigate the size- and shape-dependent SERS activity of plasmonic CSN comprised of AuNS as cores and Ag cuboids as shells. The SERS activity of CSN with spherical core was found to increase with the increasing thickness of the Ag cubic shell. Sequel, under an optimized condition, a display of strong MEF and SERS signals of the resulting mixtures with increasing of Hg2+ concentrations was observed. The proposed bimodal sensor showed excellent performances for Hg2+ along with wide linear range of 0.001-1000 ppm and 0.01-1000 ppm as well as the relatively low detection limit of 0.94 and 5.16 ppb for MEF and SERS assays, respectively. Furthermore, the ability of the sensor to detect Hg2+was also confirmed in adulterated milk samples.
Collapse
Affiliation(s)
- Huanhuan Li
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, PR China
| | - Quansheng Chen
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, PR China.
| | - Md Mehedi Hassan
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, PR China
| | - Qin Ouyang
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, PR China
| | - Tianhui Jiao
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, PR China
| | - Yi Xu
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, PR China
| | - Min Chen
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, PR China
| |
Collapse
|
8
|
Luo J, Jiang D, Liu T, Peng J, Chu Z, Jin W. High-performance electrochemical mercury aptasensor based on synergistic amplification of Pt nanotube arrays and Fe 3O 4/rGO nanoprobes. Biosens Bioelectron 2017; 104:1-7. [PMID: 29291463 DOI: 10.1016/j.bios.2017.12.044] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2017] [Revised: 12/14/2017] [Accepted: 12/26/2017] [Indexed: 12/24/2022]
Abstract
In this work, a novel sandwich-type aptasensor was designed for the ultrasensitive recognition of trace mercury ions in water. Numerous oriented platinum nanotube arrays (PtNAs) were in-situ crystallized on a flexible electrode as a sensing interface, while thionine labelled Fe3O4/rGO nanocomposites as signal amplifiers. Both PtNAs/CF and nanocomposites were synthesized by easy hydrothermal processes. With their large surface area, it was favorable for electrochemical performance and immobilization of capture DNAs (cDNA) and report DNAs (rDNA). Upon the existence of Hg2+, partial linker DNAs were tightly bound with cDNAs through thymine-Hg2+-thymine pairing (T-Hg2+-T). Then rDNAs attached Fe3O4/rGO nanoprobes were fixed on the electrode through the match of remaining linker DNAs and rDNAs. Under the optimal conditions, the Hg2+ aptasensor showed a synergistic amplification performance with a wide linear range from 0.1nM to 100nM, as well as a low detection limit of 30pM. Moreover, the as-prepared aptasensor also exhibited reliable performance for assay in real lake water samples.
Collapse
Affiliation(s)
- Jingyi Luo
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, 5 Xinmofan Road, Nanjing 210009, PR China
| | - Danfeng Jiang
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, 5 Xinmofan Road, Nanjing 210009, PR China
| | - Tao Liu
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, 5 Xinmofan Road, Nanjing 210009, PR China
| | - Jingmeng Peng
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, 5 Xinmofan Road, Nanjing 210009, PR China
| | - Zhenyu Chu
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, 5 Xinmofan Road, Nanjing 210009, PR China.
| | - Wanqin Jin
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, 5 Xinmofan Road, Nanjing 210009, PR China.
| |
Collapse
|
9
|
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
| |
Collapse
|
10
|
Bala A, Górski Ł. Peptide nucleic acid as a selective recognition element for electrochemical determination of Hg 2. Bioelectrochemistry 2017; 119:189-195. [PMID: 29055249 DOI: 10.1016/j.bioelechem.2017.09.008] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2017] [Revised: 09/15/2017] [Accepted: 09/15/2017] [Indexed: 02/01/2023]
Abstract
A novel electrochemical PNA-based biosensor for the determination of Hg2+ is described. The receptor layer, containing single strands of polythymine PNA (peptide nucleic acid), was formed at the surface of gold electrode. Due to the presence of thymine bases and peptide bonds, an interaction between Hg2+ ion and receptor layer occurs. The influence of chain modification - PNA vs. DNA - and type of redox marker - anionic AQMS-Na (sodium salt of anthraquinone-2-sulfonic acid) and FeII/III (potassium ferri/ferrocyanide) or cationic MB (methylene blue) and RuHex (hexaammineruthenium(III) chloride) - were studied. Proposed PNA-based biosensor with anionic AQMS-Na as a redox marker demonstrated significantly better analytical parameters, as compared to results obtained for other tested redox markers (for measurements at pH6.0). The linear response towards Hg2+ was in the range from 5 to 500nmol·L-1 with the detection limit of 4.5nmol·L-1. The developed sensor distinguishes itself with high selectivity towards Hg2+, even for solutions containing several interfering cations. Interactions between Hg2+ and PNA receptor layer were studied using square wave voltammetry (SWV) and electrochemical impedance spectroscopy (EIS).
Collapse
Affiliation(s)
- Agnieszka Bala
- Institute of Biotechnology, Department of Microbioanalytics, Faculty of Chemistry, Warsaw University of Technology, Noakowskiego 3, 00-664 Warsaw, Poland
| | - Łukasz Górski
- Institute of Biotechnology, Department of Microbioanalytics, Faculty of Chemistry, Warsaw University of Technology, Noakowskiego 3, 00-664 Warsaw, Poland.
| |
Collapse
|
11
|
Shi L, Li Y, Rong X, Wang Y, Ding S. Facile fabrication of a novel 3D graphene framework/Bi nanoparticle film for ultrasensitive electrochemical assays of heavy metal ions. Anal Chim Acta 2017; 968:21-29. [DOI: 10.1016/j.aca.2017.03.013] [Citation(s) in RCA: 64] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2016] [Revised: 01/24/2017] [Accepted: 03/01/2017] [Indexed: 12/12/2022]
|
12
|
Shi L, Wang Y, Chu Z, Yin Y, Jiang D, Luo J, Ding S, Jin W. A highly sensitive and reusable electrochemical mercury biosensor based on tunable vertical single-walled carbon nanotubes and a target recycling strategy. J Mater Chem B 2017; 5:1073-1080. [DOI: 10.1039/c6tb02658c] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Conformational regulation of SAMs was proposed for controlled growth of v-SWCNTs, which were employed to construct a high-performance mercury biosensor using a target recycling strategy.
Collapse
Affiliation(s)
- Lei Shi
- State Key Laboratory of Lake Science and Environment
- Nanjing Institute of Geography and Limnology
- Chinese Academy of Sciences
- Nanjing 210008
- P. R. China
| | - Yan Wang
- State Key Laboratory of Lake Science and Environment
- Nanjing Institute of Geography and Limnology
- Chinese Academy of Sciences
- Nanjing 210008
- P. R. China
| | - Zhenyu Chu
- State Key Laboratory of Materials-Oriented Chemical Engineering
- College of Chemical Engineering
- Nanjing Tech University
- Nanjing 210009
- P. R. China
| | - Yu Yin
- School of Environmental and Chemical Engineering
- Jiangsu University of Science and Technology
- Zhenjiang 212003
- P. R. China
| | - Danfeng Jiang
- State Key Laboratory of Materials-Oriented Chemical Engineering
- College of Chemical Engineering
- Nanjing Tech University
- Nanjing 210009
- P. R. China
| | - Jingyi Luo
- State Key Laboratory of Materials-Oriented Chemical Engineering
- College of Chemical Engineering
- Nanjing Tech University
- Nanjing 210009
- P. R. China
| | - Shiming Ding
- State Key Laboratory of Lake Science and Environment
- Nanjing Institute of Geography and Limnology
- Chinese Academy of Sciences
- Nanjing 210008
- P. R. China
| | - Wanqin Jin
- State Key Laboratory of Materials-Oriented Chemical Engineering
- College of Chemical Engineering
- Nanjing Tech University
- Nanjing 210009
- P. R. China
| |
Collapse
|
13
|
Shi L, Wang Y, Ding S, Chu Z, Yin Y, Jiang D, Luo J, Jin W. A facile and green strategy for preparing newly-designed 3D graphene/gold film and its application in highly efficient electrochemical mercury assay. Biosens Bioelectron 2016; 89:871-879. [PMID: 27818041 DOI: 10.1016/j.bios.2016.09.104] [Citation(s) in RCA: 51] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2016] [Revised: 09/27/2016] [Accepted: 09/28/2016] [Indexed: 02/07/2023]
Abstract
In this work, we report a facile and green strategy for in situ and one step preparation of a novel 3D graphene/gold (G/Au) film. Triggering with unique driving force from hydrothermal growth, a 3D interlaced graphene framework with hierarchically porous structures was directly attached on a gold substrate pretreated with a self-assembled monolayer. Simultaneously, highly dispersive Au nanoparticles with tunable morphologies were anchored on the framework utilizing generated graphene as an endogenous reductant. Newly-designed 3D G/Au film possessed excellent properties of significantly large specific area, good electrical conductivity, high structure stability and substrate binding strength, etc. As a paradigm, an electrochemical Hg2+ biosensor was constructed on 3D G/Au film, in which an exonuclease III-assisted target recycling was introduced. Impressively, an ultralow detection limit of 50 aM (S/N=3), a wide linear range from 0.1 fM to 0.1μM, a high selectivity and a good reliability for Hg2+ assay in real water and serum samples were realized using prepared biosensor. It is highly envisioned that this work opens the door towards simply fabricating varying types of 3D graphene based hybrid films, and such G/Au film will have widespread applications in electroanalysis and electrocatalysis.
Collapse
Affiliation(s)
- Lei Shi
- State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, PR China
| | - Yan Wang
- State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, PR China
| | - Shiming Ding
- State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, PR China.
| | - Zhenyu Chu
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, Nanjing 210009, PR China
| | - Yu Yin
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, PR China
| | - Danfeng Jiang
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, Nanjing 210009, PR China
| | - Jingyi Luo
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, Nanjing 210009, PR China
| | - Wanqin Jin
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, Nanjing 210009, PR China
| |
Collapse
|
14
|
Xie H, Wang Q, Chai Y, Yuan Y, Yuan R. Enzyme-assisted cycling amplification and DNA-templated in-situ deposition of silver nanoparticles for the sensitive electrochemical detection of Hg(2.). Biosens Bioelectron 2016; 86:630-635. [PMID: 27471153 DOI: 10.1016/j.bios.2016.07.035] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2016] [Revised: 06/06/2016] [Accepted: 07/11/2016] [Indexed: 10/21/2022]
Abstract
In this work, a label-free electrochemical biosensor was developed for sensitive and selective detection of mercury (II) ions (Hg(2+)) based on in-situ deposition of silver nanoparticles (AgNPs) on terminal deoxynucleotidyl transferase (TdT) extended ssDNA for signal output and nicking endonuclease for cycling amplification. In the presence of target Hg(2+), the T-rich DNA (HP1) could partly fold into duplex-like structure (termed as output DNA) via T-Hg(2+)-T base pairs and thus exposed its sticky end. The sticky end of output DNA could then hybridize with 3'-PO4 terminated capture DNA (HP2) on electrode surface to form output DNA-HP2 hybridization complex with the sequence 5'-CCTCAGC-3'/3'-GGAGTCG-5' (the sequence could be recognized by nicking endonuclease Nt. BbvCI). With the introduction of Nt. BbvCI, output DNA existed in hybridization complex was released from electrode and participated in the next hybridization process, accompanying with the cleave of HP2 to expose substantial 3'-OH group, which could be extended into a long ssDNA nanotail with the aid of TdT and deoxyadenosine triphosphate (dATP). Since the long negatively charged ssDNA nanotail absorbed the positively charged silver ions on the DNA skeleton, the metallic silver could be in-situ deposited on electrode surface for electrochemical signal output upon addition of reduction regent sodium borohydride. Under optimal conditions, the developed electrochemical biosensor presented a good response to Hg(2+) with a detection limit of 3 pM (S/N=3). Furthermore, the biosensor exhibited good reproducibility and high selectivity towards other interfering ions. The proposed sensing system also showed a promising potential application in real sample analysis.
Collapse
Affiliation(s)
- Hua Xie
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing, 400715 PR China
| | - Qin Wang
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing, 400715 PR China
| | - Yaqin Chai
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing, 400715 PR China
| | - Yali Yuan
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing, 400715 PR China.
| | - Ruo Yuan
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing, 400715 PR China.
| |
Collapse
|
15
|
Han S, Zhou X, Tang Y, He M, Zhang X, Shi H, Xiang Y. Practical, highly sensitive, and regenerable evanescent-wave biosensor for detection of Hg2+ and Pb2+ in water. Biosens Bioelectron 2016; 80:265-272. [DOI: 10.1016/j.bios.2016.01.070] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2015] [Revised: 01/27/2016] [Accepted: 01/28/2016] [Indexed: 10/22/2022]
|
16
|
Wang X, Hou T, Dong S, Liu X, Li F. Fluorescence biosensing strategy based on mercury ion-mediated DNA conformational switch and nicking enzyme-assisted cycling amplification for highly sensitive detection of carbamate pesticide. Biosens Bioelectron 2016; 77:644-9. [DOI: 10.1016/j.bios.2015.10.034] [Citation(s) in RCA: 52] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2015] [Revised: 09/29/2015] [Accepted: 10/11/2015] [Indexed: 11/16/2022]
|
17
|
Yang Y, Yuan Z, Liu XP, Liu Q, Mao CJ, Niu HL, Jin BK, Zhang SY. Electrochemical biosensor for Ni 2+ detection based on a DNAzyme-CdSe nanocomposite. Biosens Bioelectron 2016; 77:13-8. [DOI: 10.1016/j.bios.2015.09.014] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2015] [Revised: 09/05/2015] [Accepted: 09/07/2015] [Indexed: 10/23/2022]
|
18
|
Ren W, Zhang Y, Chen HG, Gao ZF, Li NB, Luo HQ. Ultrasensitive Label-Free Resonance Rayleigh Scattering Aptasensor for Hg(2+) Using Hg(2+)-Triggered Exonuclease III-Assisted Target Recycling and Growth of G-Wires for Signal Amplification. Anal Chem 2016; 88:1385-90. [PMID: 26704253 DOI: 10.1021/acs.analchem.5b03972] [Citation(s) in RCA: 105] [Impact Index Per Article: 13.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
A novel signal-on and label-free resonance Rayleigh scattering (RRS) aptasensor was constructed for detection of Hg(2+) based on Hg(2+)-triggered Exonuclease III-assisted target recycling and growth of G-quadruplex nanowires (G-wires) for signal amplification. The hairpin DNA (H-DNA) was wisely designed with thymine-rich recognition termini and a G-quadruplex sequence in the loop and employed as a signal probe for specially recognizing trace Hg(2+) by a stable T-Hg(2+)-T structure, which automatically triggered Exonuclease III (Exo-III) digestion to recycle Hg(2+) and liberate the G-quadruplex sequence. The free G-quadruplex sequences were self-assembled into guanine nanowire (G-wire) superstructure in the presence of Mg(2+) and demonstrated by gel electrophoresis. The RRS intensity was dramatically amplified by the resultant G-wires, and the maximum RRS signal at 370 nm was linear with the logarithm of Hg(2+) concentration in the range of 50.0 pM to 500.0 nM (R = 0.9957). Selectivity experiments revealed that the as-prepared RRS sensor was specific for Hg(2+), even coexisting with high concentrations of other metal ions. This optical aptasensor was successfully applied to identify Hg(2+) in laboratory tap water and river water samples. With excellent sensitivity and selectivity, the proposed RRS aptasensor was potentially suitable for not only routine detection of Hg(2+) in environmental monitoring but also various target detection just by changing the recognition sequence of the H-DNA probe.
Collapse
Affiliation(s)
- Wang Ren
- Key Laboratory of Eco-environments in Three Gorges Reservoir Region (Ministry of Education), School of Chemistry and Chemical Engineering, Southwest University , Chongqing 400715, People's Republic of China.,College of Chemistry and Pharmaceutical Engineering, Sichuan Provincial Academician (Expert) Workstation, Key Laboratory of Green Catalysis of Higher Education Institutes of Sichuan, Sichuan University of Science and Engineering , Zigong 643000, People's Republic of China
| | - Ying Zhang
- Key Laboratory of Eco-environments in Three Gorges Reservoir Region (Ministry of Education), School of Chemistry and Chemical Engineering, Southwest University , Chongqing 400715, People's Republic of China.,College of Chemistry and Pharmaceutical Engineering, Sichuan Provincial Academician (Expert) Workstation, Key Laboratory of Green Catalysis of Higher Education Institutes of Sichuan, Sichuan University of Science and Engineering , Zigong 643000, People's Republic of China
| | - Hong Guo Chen
- Key Laboratory of Eco-environments in Three Gorges Reservoir Region (Ministry of Education), School of Chemistry and Chemical Engineering, Southwest University , Chongqing 400715, People's Republic of China
| | - Zhong Feng Gao
- Key Laboratory of Eco-environments in Three Gorges Reservoir Region (Ministry of Education), School of Chemistry and Chemical Engineering, Southwest University , Chongqing 400715, People's Republic of China
| | - Nian Bing Li
- Key Laboratory of Eco-environments in Three Gorges Reservoir Region (Ministry of Education), School of Chemistry and Chemical Engineering, Southwest University , Chongqing 400715, People's Republic of China
| | - Hong Qun Luo
- Key Laboratory of Eco-environments in Three Gorges Reservoir Region (Ministry of Education), School of Chemistry and Chemical Engineering, Southwest University , Chongqing 400715, People's Republic of China
| |
Collapse
|
19
|
Wang X, Dong S, Hou T, Liu L, Liu X, Li F. Exonuclease I-aided homogeneous electrochemical strategy for organophosphorus pesticide detection based on enzyme inhibition integrated with a DNA conformational switch. Analyst 2016; 141:1830-6. [DOI: 10.1039/c5an02374b] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
A homogeneous electrochemical strategy for the detection of organophosphorus pesticides based on the inhibition of acetylcholinesterase activity and configuration change of hairpin DNA probes was developed.
Collapse
Affiliation(s)
- Xiuzhong Wang
- College of Chemistry and Pharmaceutical Sciences
- Qingdao Agricultural University
- Qingdao 266109
- China
| | - Shanshan Dong
- College of Chemistry and Pharmaceutical Sciences
- Qingdao Agricultural University
- Qingdao 266109
- China
| | - Ting Hou
- College of Chemistry and Pharmaceutical Sciences
- Qingdao Agricultural University
- Qingdao 266109
- China
| | - Lei Liu
- College of Chemistry and Pharmaceutical Sciences
- Qingdao Agricultural University
- Qingdao 266109
- China
| | - Xiaojuan Liu
- College of Chemistry and Pharmaceutical Sciences
- Qingdao Agricultural University
- Qingdao 266109
- China
| | - Feng Li
- College of Chemistry and Pharmaceutical Sciences
- Qingdao Agricultural University
- Qingdao 266109
- China
| |
Collapse
|
20
|
Zhu G, Zhang CY. Functional nucleic acid-based sensors for heavy metal ion assays. Analyst 2015; 139:6326-42. [PMID: 25356810 DOI: 10.1039/c4an01069h] [Citation(s) in RCA: 68] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Heavy metal contaminants such as lead ions (Pb(2+)), mercury ions (Hg(2+)) and silver ions (Ag(+)) can cause significant harm to humans and generate enduring bioaccumulation in ecological systems. Even though a variety of methods have been developed for Pb(2+), Hg(2+) and Ag(+) assays, most of them are usually laborious and time-consuming with poor sensitivity. Due to their unique advantages of excellent catalytic properties and high affinity for heavy metal ions, functional nucleic acids such as DNAzymes and aptamers show great promise in the development of novel sensors for heavy metal ion assays. In this review, we summarize the development of functional nucleic acid-based sensors for the detection of Pb(2+), Hg(2+) and Ag(+), and especially focus on two categories including the direct assay and the amplification-based assay. We highlight the emerging trends in the development of sensitive and selective sensors for heavy metal ion assays as well.
Collapse
Affiliation(s)
- Guichi Zhu
- Single-Molecule Detection and Imaging Laboratory, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Guangdong 518055, China.
| | | |
Collapse
|
21
|
Zhang Y, Xie J, Liu Y, Pang P, Feng L, Wang H, Wu Z, Yang W. Simple and signal-off electrochemical biosensor for mercury(II) based on thymine-mercury-thymine hybridization directly on graphene. Electrochim Acta 2015. [DOI: 10.1016/j.electacta.2015.04.152] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
|
22
|
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.
Collapse
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.
| |
Collapse
|
23
|
Huang H, Shi S, Zheng X, Yao T. Sensitive detection for coralyne and mercury ions based on homo-A/T DNA by exonuclease signal amplification. Biosens Bioelectron 2015; 71:439-444. [PMID: 25950941 DOI: 10.1016/j.bios.2015.04.076] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2015] [Revised: 04/13/2015] [Accepted: 04/23/2015] [Indexed: 12/27/2022]
Abstract
Based on specific homo-A/T DNA binding properties, a strategy for coralyne and mercury ions detection was realised by exonuclease-aided signal amplification. Coralyne could specifically bind homo-A DNA and protect it from the hydrolysis of exonuclease I. The coralyne-protected DNA was subsequently used as a trigger strand to hydrolyze DNA2 in exonuclease-aided signal amplification process. Thiazole orange was used to quantify the remainder DNA2. Under the optimal condition, the fluorescence intensity was linearly proportional to the concentration of coralyne in the range of 0.2-100 nM with a limit of detection (LOD) of 0.31 nM, which presented the lowest LOD for coralyne among all reported. With homo-T and Hg(2+) taking the place of homo-A DNA and coralyne, respectively, the system could also be used for Hg(2+) detection. The experiments in real samples also showed good results. This method was label-free, low-cost, easy-operating and highly repeatable for the detection of coralyne and mercury ions. It could also be extended to detect various analytes, such as other metal ions, proteins and small molecules by using appropriate aptamers.
Collapse
Affiliation(s)
- Hailiang Huang
- Department of Chemistry, and Shanghai Key Lab of Chemical Assessment and Sustainability, Tongji University, Shanghai 200092, China
| | - Shuo Shi
- Department of Chemistry, and Shanghai Key Lab of Chemical Assessment and Sustainability, Tongji University, Shanghai 200092, China.
| | - Xuyue Zheng
- Department of Chemistry, and Shanghai Key Lab of Chemical Assessment and Sustainability, Tongji University, Shanghai 200092, China
| | - Tianming Yao
- Department of Chemistry, and Shanghai Key Lab of Chemical Assessment and Sustainability, Tongji University, Shanghai 200092, China.
| |
Collapse
|
24
|
Saleem M, Lee KH. Optical sensor: a promising strategy for environmental and biomedical monitoring of ionic species. RSC Adv 2015. [DOI: 10.1039/c5ra11388a] [Citation(s) in RCA: 157] [Impact Index Per Article: 17.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
In this review, we cover the recent developments in fluorogenic and chromogenic sensors for Cu2+, Fe2+/Fe3+, Zn2+and Hg2+.
Collapse
Affiliation(s)
- Muhammad Saleem
- Department of Chemistry
- Kongju National University
- Gongju
- Republic of Korea
| | - Ki Hwan Lee
- Department of Chemistry
- Kongju National University
- Gongju
- Republic of Korea
| |
Collapse
|
25
|
Tian R, Chen X, Jiang N, Hao N, Xu L, Yao C. An electrochemical sensing strategy based on a three dimensional ordered macroporous polyaniline–platinum platform and a mercury(ii) ion-mediated DNAzyme functionalized nanolabel. J Mater Chem B 2015; 3:4805-4813. [DOI: 10.1039/c5tb00796h] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An Hg2+-switched DNA biosensor using a three dimensional ordered macroporous polyaniline–platinum platform and a G-rich sequence recognition probe was developed, with the detection limit of 8.7 × 10−14 M.
Collapse
Affiliation(s)
- Rong Tian
- College of Sciences
- Nanjing Tech University
- Nanjing
- P. R. China
| | - Xiaojun Chen
- College of Sciences
- Nanjing Tech University
- Nanjing
- P. R. China
| | - Nan Jiang
- College of Sciences
- Nanjing Tech University
- Nanjing
- P. R. China
| | - Ning Hao
- Biotechnology and Pharmaceutical Engineering
- Nanjing Tech University
- Nanjing 211816
- P. R. China
| | - Lin Xu
- Biotechnology and Pharmaceutical Engineering
- Nanjing Tech University
- Nanjing 211816
- P. R. China
| | - Cheng Yao
- College of Sciences
- Nanjing Tech University
- Nanjing
- P. R. China
| |
Collapse
|
26
|
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]
|
27
|
Xin M, Zhang X, Yang J, Chen M, Ma X, Liu J. Preparation and electrochemical sensing application of electrospun porous organosilica fibers. Electrochem commun 2014. [DOI: 10.1016/j.elecom.2014.09.001] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022] Open
|
28
|
Liu GP, Wu YM, Yuan YL, Chai YQ, Wei SQ, Zhang DJ. Manganese(iii)meso-tetrakis(4-N-methylpyridyl)-porphyrin and mediator thionine co-decorated DNA nanowires for sensitive electrochemical monitoring of mercury(ii). RSC Adv 2014. [DOI: 10.1039/c4ra09162k] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
|
29
|
Huang J, Gao X, Jia J, Kim JK, Li Z. Graphene Oxide-Based Amplified Fluorescent Biosensor for Hg2+ Detection through Hybridization Chain Reactions. Anal Chem 2014; 86:3209-15. [DOI: 10.1021/ac500192r] [Citation(s) in RCA: 206] [Impact Index Per Article: 20.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Jiahao Huang
- Department
of Mechanical
and Aerospace Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong
| | - Xiang Gao
- Department
of Mechanical
and Aerospace Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong
| | - Jingjing Jia
- Department
of Mechanical
and Aerospace Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong
| | - Jang-Kyo Kim
- Department
of Mechanical
and Aerospace Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong
| | - Zhigang Li
- Department
of Mechanical
and Aerospace Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong
| |
Collapse
|
30
|
Shi L, Chu Z, Liu Y, Peng J, Jin W. Three-dimensional porous microarray of gold modified electrode for ultrasensitive and simultaneous assay of various cancer biomarkers. J Mater Chem B 2014; 2:2658-2665. [DOI: 10.1039/c4tb00016a] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
|