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Çamurcu T, Sanko V, Ömeroğlu İ, Tümay SO, Şenocak A. Sulfonated-polypyrene aniline/polyaniline composite fortified with Cu-GQD@ZIF8 as an electrochemical enzymatic urea biosensor. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2024. [PMID: 39254379 DOI: 10.1039/d4ay01397b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/11/2024]
Abstract
The determination of urea concentration is essential for human health owing to its crucial role in the ability to metabolize nitrogen-containing substances. This study developed new electrochemical enzymatic detection systems via the synergistic effect of the superior features of novel electropolymerizable pyranine-aniline (PA, 4), polyaniline (PANI) compounds, graphene quantum dots (GQDs) and zeolitic imidazolate framework-8 (ZIF8). The novel compound 4 was characterized via1H-NMR, 13C-NMR, FTIR, and MALDI-TOF mass spectroscopies. Furthermore, Cu-GQD@ZIF8 hybrid materials containing GQD and integrated electroactive Cu metal were prepared in this study. The surface morphology of the prepared Cu-GQD@ZIF8 hybrid material was investigated through microscopic methods such as SEM and TEM, and chemical characterizations were performed using FTIR, XPS, XRD, and TGA analyses. After the characterization of the novel materials, the urease (Urs) enzyme was bound to the new modified electrode surface. Next, the enzymatic biosensor properties of the Urs/Cu-GQD@ZIF8/PANI/PA/GCE sensor electrode for urea detection via reduction of PANI were investigated by DPV and CV techniques. The LOD and LOQ values of the presented sensor were calculated to be 0.77 μM and 2.31 μM, respectively, in the linear range of 1.0-80.0 μM, based on DPV measurements. The presented biosensor system determined the amount of urea in an artificial serum sample, and its accuracy was confirmed via the recovery test and GC-MS analysis.
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Affiliation(s)
- Taşkın Çamurcu
- Department of Chemistry, Gebze Technical University, Gebze 41400, Kocaeli, Turkey.
| | - Vildan Sanko
- Department of Chemistry, Hacettepe University, Ankara 06800, Turkey
- METU MEMS Center, Ankara, 06530, Turkey
| | - İpek Ömeroğlu
- Department of Chemistry, Gebze Technical University, Gebze 41400, Kocaeli, Turkey.
| | | | - Ahmet Şenocak
- Department of Chemistry, Gebze Technical University, Gebze 41400, Kocaeli, Turkey.
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2
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Dubourg G, Pavlović Z, Bajac B, Kukkar M, Finčur N, Novaković Z, Radović M. Advancement of metal oxide nanomaterials on agri-food fronts. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 928:172048. [PMID: 38580125 DOI: 10.1016/j.scitotenv.2024.172048] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/27/2023] [Revised: 03/03/2024] [Accepted: 03/26/2024] [Indexed: 04/07/2024]
Abstract
The application of metal oxide nanomaterials (MOx NMs) in the agrifood industry offers innovative solutions that can facilitate a paradigm shift in a sector that is currently facing challenges in meeting the growing requirements for food production, while safeguarding the environment from the impacts of current agriculture practices. This review comprehensively illustrates recent advancements and applications of MOx for sustainable practices in the food and agricultural industries and environmental preservation. Relevant published data point out that MOx NMs can be tailored for specific properties, enabling advanced design concepts with improved features for various applications in the agrifood industry. Applications include nano-agrochemical formulation, control of food quality through nanosensors, and smart food packaging. Furthermore, recent research suggests MOx's vital role in addressing environmental challenges by removing toxic elements from contaminated soil and water. This mitigates the environmental effects of widespread agrichemical use and creates a more favorable environment for plant growth. The review also discusses potential barriers, particularly regarding MOx toxicity and risk evaluation. Fundamental concerns about possible adverse effects on human health and the environment must be addressed to establish an appropriate regulatory framework for nano metal oxide-based food and agricultural products.
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Affiliation(s)
- Georges Dubourg
- University of Novi Sad, Center for Sensor Technologies, Biosense Institute, Dr Zorana Đinđića 1, 21000 Novi Sad, Serbia.
| | - Zoran Pavlović
- University of Novi Sad, Center for Sensor Technologies, Biosense Institute, Dr Zorana Đinđića 1, 21000 Novi Sad, Serbia
| | - Branimir Bajac
- University of Novi Sad, Center for Sensor Technologies, Biosense Institute, Dr Zorana Đinđića 1, 21000 Novi Sad, Serbia
| | - Manil Kukkar
- University of Novi Sad, Center for Sensor Technologies, Biosense Institute, Dr Zorana Đinđića 1, 21000 Novi Sad, Serbia
| | - Nina Finčur
- University of Novi Sad Faculty of Sciences, Department of Chemistry, Biochemistry and Environmental Protection, Trg Dositeja Obradovića 3, 21000 Novi Sad, Serbia
| | - Zorica Novaković
- University of Novi Sad, Center for Sensor Technologies, Biosense Institute, Dr Zorana Đinđića 1, 21000 Novi Sad, Serbia
| | - Marko Radović
- University of Novi Sad, Center for Sensor Technologies, Biosense Institute, Dr Zorana Đinđića 1, 21000 Novi Sad, Serbia
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3
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Verma R, Yadav SK, Singh KR, Verma R, Kumar D, Singh J. Laccase-Conjugated Nanostructured ZnFe 2O 4/rGO-Modified Electrode-Based Interfaces for Electrochemical Impedance Monitoring of Adrenaline: A Promising Biosensor for Management of Neurodegenerative Disorders. ACS APPLIED BIO MATERIALS 2023; 6:5842-5853. [PMID: 38054277 DOI: 10.1021/acsabm.3c00968] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/07/2023]
Abstract
A propitious biosensor for adrenaline (AD) detection in bovine serum albumin (BSA) real samples, which can be used for diagnosis and treatment of neurodegenerative disorders, is reported here. The biosensor consists of a La/ZF/rGO/ITO bioelectrode, which is fabricated by electrophoretic deposition of zinc ferrite/reduced graphene oxide (ZF/rGO) nanohybrid followed by drop casting of laccase (La) enzymes. The material characterization and electrochemical studies revealed that the ZF/rGO nanohybrid enhanced the electroactive surface and facilitated direct electron transfer between the electrode and electrolyte interface, resulting in enhanced electrocatalytic performance. The cyclic voltammetry and electrochemical impedance spectroscopy results asserted that the ZF/rGO nanohybrid decreased the charge-transfer resistance (Rct) and increased the surface adsorption, leading to a high diffusion coefficient (D) of 0.192 cm2/s. The biosensor exhibited a high sensitivity of 0.71 Ω/μM cm2, a good linear range (0.1 to 140 μM with R2 = 0.98), and a low limit of detection (LOD) is 12.5 μM, demonstrating the synergic effect of ZF and rGO in the La/ZF/rGO/ITO bioelectrode with AD. The biosensor also exhibited high selectivity and stability (55 days) in the presence of interfering substances and in BSA samples, with a recovery percentage close to 100 ± 5% RSD, indicating its potential biosensing applications for real-world applications in disease diagnostics, monitoring, and treatment.
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Affiliation(s)
- Rahul Verma
- Department of Chemistry, Institute of Science, Banaras Hindu University, Varanasi, Uttar Pradesh 221005, India
| | - Surendra K Yadav
- Department of Chemistry, Institute of Science, Banaras Hindu University, Varanasi, Uttar Pradesh 221005, India
| | - Kshitij Rb Singh
- Department of Chemistry, Institute of Science, Banaras Hindu University, Varanasi, Uttar Pradesh 221005, India
| | - Ranjana Verma
- Department of Physics, Institute of Science, Banaras Hindu University, Varanasi, Uttar Pradesh 221005, India
| | - Deepak Kumar
- Department of Pharmaceutical Chemistry, School of Pharmaceutical Sciences, Shoolini University, Solan, Himachal Pradesh 173229, India
| | - Jay Singh
- Department of Chemistry, Institute of Science, Banaras Hindu University, Varanasi, Uttar Pradesh 221005, India
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Parveen M, Tahira A, Mahar IA, Bhatti MA, Dawi E, Nafady A, Alshammari RH, Vigolo B, Qi K, Ibupoto ZH. Green structure orienting and reducing agents of wheat peel extract induced abundant surface oxygen vacancies and transformed the nanoflake morphology of NiO into a plate-like shape with enhanced non-enzymatic urea sensing application. RSC Adv 2023; 13:34122-34135. [PMID: 38019984 PMCID: PMC10661683 DOI: 10.1039/d3ra06296a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2023] [Accepted: 11/05/2023] [Indexed: 12/01/2023] Open
Abstract
Researchers are increasingly focusing on using biomass waste for green synthesis of nanostructured materials since green reducing, capping, stabilizing and orientation agents play a significant role in final application. Wheat peel extract contains a rich source of reducing and structure orienting agents that are not utilized for morphological transformation of NiO nanostructures. Our study focuses on the role of wheat peel extract in morphological transformation during the synthesis of NiO nanostructures as well as in non-enzymatic electrochemical urea sensing. It was observed that the morphological transformation of NiO flakes into nanoplatelets took place in the presence of wheat peel extract during the preparation of NiO nanostructures and that both the lateral size and thickness of the nanostructures were significantly reduced. Wheat peel extract was also found to reduce the optical band gap of NiO. A NiO nanostructure prepared with 5 mL of wheat peel extract (sample 2) was highly efficient for the detection of urea without the use of urease enzyme. It has been demonstrated that the induced modification of NiO nanoplatelets through the use of structure-orienting agents in the wheat peel has enhanced their electrochemical performance. A linear range of 0.1 mM to 13 mM was achieved with a detection limit of 0.003 mM in the proposed urea sensor. The performance of the presented non-enzymatic urea sensor was evaluated in terms of selectivity, stability, reproducibility, and practical application, and the results were highly satisfactory. As a result of the high surface active sites on sample 2, the low charge transfer resistance, as well as the high exposure to the surface active sites of wheat peel extract, sample 2 demonstrated enhanced performance. The wheat peel extract could be used for the green synthesis of a wide range of nanostructured materials, particularly metal/metal oxides for various electrochemical applications.
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Affiliation(s)
- Mehnaz Parveen
- Institute of Chemistry, University of Sindh Jamshoro 76080 Sindh Pakistan
| | - Aneela Tahira
- Institute of Chemistry, Shah Abdul Latif University Khairpur Mirs Sindh Pakistan
| | - Ihsan Ali Mahar
- Institute of Chemistry, University of Sindh Jamshoro 76080 Sindh Pakistan
| | - Muhammad Ali Bhatti
- Institute of Environmental Sciences, University of Sindh Jamshoro 76080 Sindh Pakistan
| | - Elmuez Dawi
- College of Humanities and Sciences, Department of Mathematics and Sciences, Ajman University P.O. Box 346 United Arab Emirates
| | - Ayman Nafady
- Chemistry Department, College of Science, King Saud University Riyadh 11451 Saudi Arabia
| | - Riyadh H Alshammari
- Chemistry Department, College of Science, King Saud University Riyadh 11451 Saudi Arabia
| | | | - Kezhen Qi
- College of Pharmacy, Dali University Dali Yunnan 671000 China
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Naz I, Tahira A, Shah AA, Bhatti MA, Mahar IA, Markhand MP, Mastoi GM, Nafady A, Medany SS, Dawi EA, Saleem LM, Vigolo B, Ibupoto ZH. Green Synthesis of NiO Nanoflakes Using Bitter Gourd Peel, and Their Electrochemical Urea Sensing Application. MICROMACHINES 2023; 14:677. [PMID: 36985084 PMCID: PMC10053069 DOI: 10.3390/mi14030677] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/08/2023] [Revised: 03/13/2023] [Accepted: 03/16/2023] [Indexed: 06/18/2023]
Abstract
To determine urea accurately in clinical samples, food samples, dairy products, and agricultural samples, a new analytical method is required, and non-enzymatic methods are preferred due to their low cost and ease of use. In this study, bitter gourd peel biomass waste is utilized to modify and structurally transform nickel oxide (NiO) nanostructures during the low-temperature aqueous chemical growth method. As a result of the high concentration of phytochemicals, the surface was highly sensitive to urea oxidation under alkaline conditions of 0.1 M NaOH. We investigated the structure and shape of NiO nanostructures using powder X-ray diffraction (XRD) and scanning electron microscopy (SEM). In spite of their flake-like morphology and excellent crystal quality, NiO nanostructures exhibited cubic phases. An investigation of the effects of bitter gourd juice demonstrated that a large volume of juice produced thin flakes measuring 100 to 200 nanometers in diameter. We are able to detect urea concentrations between 1-9 mM with a detection limit of 0.02 mM using our urea sensor. Additionally, the stability, reproducibility, repeatability, and selectivity of the sensor were examined. A variety of real samples, including milk, blood, urine, wheat flour, and curd, were used to test the non-enzymatic urea sensors. These real samples demonstrated the potential of the electrode device for measuring urea in a routine manner. It is noteworthy that bitter gourd contains phytochemicals that are capable of altering surfaces and activating catalytic reactions. In this way, new materials can be developed for a wide range of applications, including biomedicine, energy production, and environmental protection.
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Affiliation(s)
- Irum Naz
- Dr. M.A Kazi Institute of Chemistry, University of Sindh, Jamshoro 76080, Pakistan; (I.N.); (A.T.); (G.M.M.)
| | - Aneela Tahira
- Dr. M.A Kazi Institute of Chemistry, University of Sindh, Jamshoro 76080, Pakistan; (I.N.); (A.T.); (G.M.M.)
- Institute of Chemistry, Shah Abdul Latif University, Khairpur Mirs 66111, Pakistan;
| | - Aqeel Ahmed Shah
- Wet Chemistry Laboratory, Department of Metallurgical Engineering, NED University of Engineering and Technology, University Road, Karachi 75270, Pakistan;
| | - Muhammad Ali Bhatti
- Centre for Environmental Sciences, University of Sindh, Jamshoro 76080, Pakistan
| | - Ihsan Ali Mahar
- Dr. M.A Kazi Institute of Chemistry, University of Sindh, Jamshoro 76080, Pakistan; (I.N.); (A.T.); (G.M.M.)
| | | | - Ghulam Murtaza Mastoi
- Dr. M.A Kazi Institute of Chemistry, University of Sindh, Jamshoro 76080, Pakistan; (I.N.); (A.T.); (G.M.M.)
| | - Ayman Nafady
- Department of Chemistry, College of Science, King Saud University, Riyadh 11451, Saudi Arabia;
| | - Shymaa S. Medany
- Department of Chemistry, Faculty of Science, Cairo University, Cairo 12613, Egypt;
| | - Elmuez A. Dawi
- Nonlinear Dynamics Research Centre (NDRC), Ajman University, Ajman P.O. Box 346, United Arab Emirates
| | - Lama M. Saleem
- Biomolecular Science, Earth and Life Science, Amsterdam University, De Boelelaan 1 105, 1081 HV Amsterdam, The Netherlands;
| | - Brigitte Vigolo
- Institut Jean Lamour, CNRS-Université de Lorraine, F-54000 Nancy, France;
| | - Zafar Hussain Ibupoto
- Dr. M.A Kazi Institute of Chemistry, University of Sindh, Jamshoro 76080, Pakistan; (I.N.); (A.T.); (G.M.M.)
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Li Y, Zhao A, Wang J, Yu J, Xiao F, Sun H. Highly Bright Gold Nanowires Arrays for Sensitive Detection of Urea and Urease. NANOMATERIALS (BASEL, SWITZERLAND) 2022; 12:4023. [PMID: 36432310 PMCID: PMC9698401 DOI: 10.3390/nano12224023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/30/2022] [Revised: 11/12/2022] [Accepted: 11/14/2022] [Indexed: 06/16/2023]
Abstract
In this work, highly fluorescent gold nanowire arrays (Au NWs) are successfully synthesized by assembling Zn2+ ions and non-emissive oligomeric gold-thiolate clusters using mercaptopropionic acid both as a reducing agent and a growth ligand. The synthesized Au NWs exhibited strong bluish green fluorescence with an absolute quantum yield up to 32% and possessed ultrasensitive pH stimuli-responsive performance in the range of 7.0-7.8. Based on the excellent properties of the as-prepared nanowire arrays, we developed a facile, sensitive, and selective fluorescent method for quantitative detection of urea and urease. The fabricated nanoprobe showed superior biosensing response characteristics with good linearities in the range of 0-100 μM for urea concentration and 0-12 U/L for urease activity. In addition, this fluorescent probe afforded relatively high sensitivity with the detection limit as low as 2.1 μM and 0.13 U/L for urea and urease, respectively. Urea in human urine and urease in human serum were detected with satisfied results, exhibiting a promising potential for biomedical application.
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Affiliation(s)
- Yan Li
- Correspondence: (Y.L.); (H.S.)
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7
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Electrochemical determination of epinephrine based on Ti3C2Tx MXene-reduced graphene oxide/ITO electrode. J Electroanal Chem (Lausanne) 2021. [DOI: 10.1016/j.jelechem.2021.115425] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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8
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Singh S, Sharma M, Singh G. Recent advancements in urea biosensors for biomedical applications. IET Nanobiotechnol 2021; 15:358-379. [PMID: 34694714 PMCID: PMC8675831 DOI: 10.1049/nbt2.12050] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2020] [Revised: 01/06/2021] [Accepted: 02/14/2021] [Indexed: 12/22/2022] Open
Abstract
The quick progress in health care technology as a recurrent measurement of biochemical factors such as blood components leads to advance development and growth in biosensor technology necessary for effectual patient concern. The review wok of authors present a concise information and brief discussion on the development made in the progress of potentiometric, field effect transistor, graphene, electrochemical, optical, polymeric, nanoparticles and nanocomposites based urea biosensors in the past two decades. The work of authors is also centred on different procedures/methods for detection of urea by using amperometric, potentiometric, conductometric and optical processes, where graphene, polymer etc. are utilised as an immobilised material for the fabrication of biosensors. Further, a comparative revision has been accomplished on various procedures of urea analysis using different materials-based biosensors, and it discloses that electrochemical and potentiometric biosensor is the most promise one among all, in terms of rapid response time, extensive shelf life and resourceful design.
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Affiliation(s)
- Saravjeet Singh
- Department of Biomedical EngineeringDeenbandhu Chhotu Ram University of Science and TechnologyMurthalSonepatIndia
| | - Minakshi Sharma
- Department of ZoologyMaharishi Dayanand UniversityRohtakHaryanaIndia
| | - Geeta Singh
- Department of Biomedical EngineeringDeenbandhu Chhotu Ram University of Science and TechnologyMurthalSonepatIndia
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9
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Speranza G. Carbon Nanomaterials: Synthesis, Functionalization and Sensing Applications. NANOMATERIALS (BASEL, SWITZERLAND) 2021; 11:967. [PMID: 33918769 PMCID: PMC8069879 DOI: 10.3390/nano11040967] [Citation(s) in RCA: 77] [Impact Index Per Article: 25.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/16/2021] [Revised: 03/16/2021] [Accepted: 03/17/2021] [Indexed: 02/07/2023]
Abstract
Recent advances in nanomaterial design and synthesis has resulted in robust sensing systems that display superior analytical performance. The use of nanomaterials within sensors has accelerated new routes and opportunities for the detection of analytes or target molecules. Among others, carbon-based sensors have reported biocompatibility, better sensitivity, better selectivity and lower limits of detection to reveal a wide range of organic and inorganic molecules. Carbon nanomaterials are among the most extensively studied materials because of their unique properties spanning from the high specific surface area, high carrier mobility, high electrical conductivity, flexibility, and optical transparency fostering their use in sensing applications. In this paper, a comprehensive review has been made to cover recent developments in the field of carbon-based nanomaterials for sensing applications. The review describes nanomaterials like fullerenes, carbon onions, carbon quantum dots, nanodiamonds, carbon nanotubes, and graphene. Synthesis of these nanostructures has been discussed along with their functionalization methods. The recent application of all these nanomaterials in sensing applications has been highlighted for the principal applicative field and the future prospects and possibilities have been outlined.
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Affiliation(s)
- Giorgio Speranza
- CMM—FBK, v. Sommarive 18, 38123 Trento, Italy;
- IFN—CNR, CSMFO Lab., via alla Cascata 56/C Povo, 38123 Trento, Italy
- Department of Industrial Engineering, University of Trento, v. Sommarive 9, 38123 Trento, Italy
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10
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Li C, Li J, Liang A, Wen G, Jiang Z. Aptamer Turn-On SERS/RRS/Fluorescence Tri-mode Platform for Ultra-trace Urea Determination Using Fe/N-Doped Carbon Dots. Front Chem 2021; 9:613083. [PMID: 33791276 PMCID: PMC8005568 DOI: 10.3389/fchem.2021.613083] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2020] [Accepted: 01/18/2021] [Indexed: 12/03/2022] Open
Abstract
Sensitive and selective methods for the determination of urea in samples such as dairy products are important for quality control and health applications. Using ammonium ferric citrate as a precursor, Fe/N-codoped carbon dots (CDFeN) were prepared by a hydrothermal procedure and characterized in detail. CDFeN strongly catalyzes the oxidation of 3,3′,5,5′-tetramethylbenzidine (TMB) by H2O2 to turn on an indicator molecular reaction, forming an oxidized tetramethylbenzidine (TMBox) probe with surface-enhanced Raman scattering, resonance Rayleigh scattering, and fluorescence (SERS, RRS, and FL) signals at 1,598 cm−1, 370 nm, and 405 nm, respectively. The urea aptamer (Apt) can turn off the indicator reaction to reduce the tri-signals, and the addition of urea turns on the indicator reaction to linearly enhance the SERS/RRS/FL intensity. Thus, a novel Apt turn-on tri-mode method was developed for the assay determination of ultra-trace urea with high sensitivity, good selectivity, and accuracy. Trace adenosine triphosphate and estradiol can also be determined by the Apt-CDFeN catalytic analytical platform.
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Affiliation(s)
- Chongning Li
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, School of Chemistry and Pharmaceutical Science, Guangxi Normal University, Guilin, China.,Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection (Guangxi Normal University), Ministry of Education, Guilin, China.,Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology for Science and Education Combined with Science and Technology Innovation Base, Guilin, China
| | - Jiao Li
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, School of Chemistry and Pharmaceutical Science, Guangxi Normal University, Guilin, China.,Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection (Guangxi Normal University), Ministry of Education, Guilin, China.,Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology for Science and Education Combined with Science and Technology Innovation Base, Guilin, China
| | - Aihui Liang
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, School of Chemistry and Pharmaceutical Science, Guangxi Normal University, Guilin, China.,Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection (Guangxi Normal University), Ministry of Education, Guilin, China.,Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology for Science and Education Combined with Science and Technology Innovation Base, Guilin, China
| | - Guiqing Wen
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, School of Chemistry and Pharmaceutical Science, Guangxi Normal University, Guilin, China.,Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection (Guangxi Normal University), Ministry of Education, Guilin, China.,Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology for Science and Education Combined with Science and Technology Innovation Base, Guilin, China
| | - Zhiliang Jiang
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, School of Chemistry and Pharmaceutical Science, Guangxi Normal University, Guilin, China.,Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection (Guangxi Normal University), Ministry of Education, Guilin, China.,Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology for Science and Education Combined with Science and Technology Innovation Base, Guilin, China
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11
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Yang M, Wang H, Liu P, Cheng J. A 3D electrochemical biosensor based on Super-Aligned Carbon NanoTube array for point-of-care uric acid monitoring. Biosens Bioelectron 2021; 179:113082. [PMID: 33601134 DOI: 10.1016/j.bios.2021.113082] [Citation(s) in RCA: 38] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2021] [Revised: 02/03/2021] [Accepted: 02/04/2021] [Indexed: 12/20/2022]
Abstract
Uric acid analysis is extremely important for gout prognosis, diagnosis and treatment. Previous technologies either lack specificity or exhibit poor performance, and thus could not meet the need of Point-of-Care (POC) uric acid monitoring. Here we present for the first time, a novel electrochemical biosensor based on 3D Super-Aligned Carbon NanoTube (SACNT) array to facilitate POC uric acid monitoring. The working electrode of the biosensor is composed of an orderly 3D SACNT array immobilized with uricase through a precipitation and crosslinking procedure. Such biosensor possesses a higher enzyme density, significantly larger contact area with reactants and could maintain the intact SACNT structure and its excellent conductivity after modification. The developed 3D SACNT array electrochemical biosensor benefits from high specific surface area, high electro-catalytic activity and large contact area with analytes, and demonstrates high sensitivity of 518.8 μA/(mM⋅cm2), wide linear range of 100-1000 μM and low limit of detection of 1 μM for uric acid. Dynamic uric acid monitoring has been achieved using the presented biosensor. And the obtained results in serum samples had no significant difference compared with those obtained using the FDA-approved electrochemical analyzer (Paired T-test, p > 0.05). These demonstrated that the technology can potentially be applied in POC monitoring of other biomolecules to improve prognosis, diagnosis and treatment outcomes of metabolic diseases.
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Affiliation(s)
- Muqun Yang
- Precision Medicine and Healthcare Research Center, Tsinghua-Berkeley Shenzhen Institute(TBSI), Tsinghua University, Shenzhen, 518055, China; Department of Biomedical Engineering, School of Medicine, Tsinghua University, Beijing, 100084, China
| | - Han Wang
- Department of Biomedical Engineering, School of Medicine, Tsinghua University, Beijing, 100084, China.
| | - Peng Liu
- Tsinghua-Foxconn Nanotechnology Research Center & State Key Laboratory of Low-Dimensional Quantum Physics, Department of Physics, Tsinghua University, Beijing, 100084, China
| | - Jing Cheng
- Precision Medicine and Healthcare Research Center, Tsinghua-Berkeley Shenzhen Institute(TBSI), Tsinghua University, Shenzhen, 518055, China; Department of Biomedical Engineering, School of Medicine, Tsinghua University, Beijing, 100084, China.
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12
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Yang F, Yang F, Tu TT, Liao N, Chai YQ, Yuan R, Zhuo Y. A synergistic promotion strategy remarkably accelerated electrochemiluminescence of SnO 2 QDs for MicroRNA detection using 3D DNA walker amplification. Biosens Bioelectron 2020; 173:112820. [PMID: 33227674 DOI: 10.1016/j.bios.2020.112820] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2020] [Revised: 11/09/2020] [Accepted: 11/11/2020] [Indexed: 01/13/2023]
Abstract
Developing low-cost and efficient methods to enhance the electrochemiluminescence (ECL) intensity of luminophores is highly desirable and challenging. Herein, we develop a synergistic promotion strategy based on three types of co-reaction accelerators to achieve an efficient SnO2 quantum dots (SnO2 QDs)-based ternary ECL system. Specifically, the MnO2 nanoflowers (MnO2 NFs), Ag nanoparticles (Ag NPs) and hemin/G-quadruplex were rationally selected as co-reaction accelerators. Owing to the synergistic effect, the deft integration of three types of co-reaction accelerators enabled better structural stability, more exposed catalytic active sites, and faster charge transfer, thus more effectively facilitating the reduction of co-reactant (S2O82-) compared with that of the single co-reaction accelerator. To demonstrate the practical utility of this principle, an "on-off-super on" ECL biosensor was constructed in combination with a 3D DNA walker, which showed a superior linear range (10 aM-100 pM) and a low detection limit (2.9 aM) for the highly-sensitive miRNA-21 detection. In general, this work firstly reported that three types of co-reaction accelerators were deftly integrated to remarkably amplify the ECL emission of SnO2 QDs, and provided brand-new perspectives for research on the ingenious design of the structure and component of highly efficient co-reaction accelerators.
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Affiliation(s)
- Fan Yang
- Key Laboratory of Luminescence Analysis and Molecular Sensing (Southwest University), Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing, 400715, PR China
| | - Fang Yang
- Key Laboratory of Luminescence Analysis and Molecular Sensing (Southwest University), Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing, 400715, PR China
| | - Ting-Ting Tu
- Key Laboratory of Luminescence Analysis and Molecular Sensing (Southwest University), Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing, 400715, PR China
| | - Ni Liao
- Key Laboratory of Luminescence Analysis and Molecular Sensing (Southwest University), Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing, 400715, PR China; College of Biological and Chemical Engineering, Panzhihua University, Panzhihua, 617000, PR China
| | - Ya-Qin Chai
- Key Laboratory of Luminescence Analysis and Molecular Sensing (Southwest University), Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing, 400715, PR China
| | - Ruo Yuan
- Key Laboratory of Luminescence Analysis and Molecular Sensing (Southwest University), Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing, 400715, PR China
| | - Ying Zhuo
- Key Laboratory of Luminescence Analysis and Molecular Sensing (Southwest University), Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing, 400715, PR China.
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13
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Liu J, Siavash Moakhar R, Sudalaiyadum Perumal A, Roman HN, Mahshid S, Wachsmann-Hogiu S. An AgNP-deposited commercial electrochemistry test strip as a platform for urea detection. Sci Rep 2020; 10:9527. [PMID: 32533102 PMCID: PMC7293235 DOI: 10.1038/s41598-020-66422-x] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2020] [Accepted: 04/29/2020] [Indexed: 11/13/2022] Open
Abstract
We developed an inexpensive, portable platform for urea detection via electrochemistry by depositing silver nanoparticles (AgNPs) on a commercial glucose test strip. We modified this strip by first removing the enzymes from the surface, followed by electrodeposition of AgNPs on one channel (working electrode). The morphology of the modified test strip was characterized by Scanning Electron Microscopy (SEM), and its electrochemical performance was evaluated via Cyclic Voltammetry (CV) and Electrochemical Impedance Spectroscopy (EIS). We evaluated the performance of the device for urea detection via measurements of the dependency of peak currents vs the analyte concentration and from the relationship between the peak current and the square root of the scan rates. The observed linear range is 1-8 mM (corresponding to the physiological range of urea concentration in human blood), and the limit of detection (LOD) is 0.14 mM. The selectivity, reproducibility, reusability, and storage stability of the modified test strips are also reported. Additional tests were performed to validate the ability to measure urea in the presence of confounding factors such as spiked plasma and milk. The results demonstrate the potential of this simple and portable EC platform to be used in applications such as medical diagnosis and food safety.
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Affiliation(s)
- Juanjuan Liu
- Department of Bioengineering, McGill University, Montreal, Quebec, H3A 0C3, Canada
| | | | | | - Horia Nicolae Roman
- Department of Bioengineering, McGill University, Montreal, Quebec, H3A 0C3, Canada
| | - Sara Mahshid
- Department of Bioengineering, McGill University, Montreal, Quebec, H3A 0C3, Canada
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14
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Chauhan S, Sahoo S, Satpati AK, Sharma C, Sahoo PK. Prussian Blue Nanocubes‐SnO
2
Quantum Dots‐Reduced Graphene Oxide Ternary Nanocomposite: An Efficient Non‐noble‐metal Electrocatalyst for Non‐enzymatic Detection of H
2
O
2. ELECTROANAL 2020. [DOI: 10.1002/elan.202000041] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- Seema Chauhan
- Department of Paper TechnologyIndian Institute of Technology Roorkee, Saharanpur Campus Saharanpur 247001 India
| | - Srikant Sahoo
- Analytical Chemistry DivisionBhabha Atomic Research Centre, Trombay Mumbai 400085 India
| | - Ashis Kumar Satpati
- Analytical Chemistry DivisionBhabha Atomic Research Centre, Trombay Mumbai 400085 India
| | - Chhaya Sharma
- Department of Paper TechnologyIndian Institute of Technology Roorkee, Saharanpur Campus Saharanpur 247001 India
| | - Prasanta Kumar Sahoo
- Department of Mechanical Engineering, Siksha ‘O' AnusandhanDeemed to be University Bhubaneswar 751030 India
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15
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Zhang L, Zhang J, Huang Y, Xu H, Zhang X, Lu H, Xu K, Chu PK, Ma F. Stability and Sensing Enhancement by Nanocubic CeO 2 with {100} Polar Facets on Graphene for NO 2 at Room Temperature. ACS APPLIED MATERIALS & INTERFACES 2020; 12:4722-4731. [PMID: 31894961 DOI: 10.1021/acsami.9b18155] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Metal oxides with a polar surface interact strongly with polar NO2 molecules, thus facilitating sensitive detection of NO2. In this work, the composites comprising graphene and cubic CeO2 nanoparticles with the {100} polar surface are prepared by a hydrothermal technique, and they exhibit fast response, excellent selectivity, stable recovery, and sensitive detection with a low detection limitation of 1 ppm for NO2 at room temperature. According to the first-principle calculations, the adsorption energy of NO2 on the CeO2{100} polar surface is the most negative corresponding to the strongest interactions between them. The formation energy of oxygen vacancies (Ov) on the {100} polar plane is also negative, and the abundant Ov facilitates the adsorption of NO2. The internal electric field near the polar surface promotes the charge separation and accelerates the charge exchange between NO2 and the composites. In addition, graphene promotes electron transfer at the interface and improves the stability of the CeO2{100} polar surface. The composites of graphene and metal oxides with a polar surface are excellent for NO2 detection, and the discovery reveals a new sensing strategy.
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Affiliation(s)
- Lizhai Zhang
- Department of Physics, Department of Materials Science and Engineering, and Department of Biomedical Engineering , City University of Hong Kong , Tat Chee Avenue , Kowloon 999077 , Hong Kong , China
- State Key Laboratory for Mechanical Behavior of Materials , Xi'an Jiaotong University , Xi'an 710049 , Shaanxi , China
| | - Jinniu Zhang
- College of Physics and Information Technology , Shaanxi Normal University , Xi'an 710062 , Shaanxi , China
| | - Yuhong Huang
- College of Physics and Information Technology , Shaanxi Normal University , Xi'an 710062 , Shaanxi , China
| | - Huiyan Xu
- Department of Physics, Department of Materials Science and Engineering, and Department of Biomedical Engineering , City University of Hong Kong , Tat Chee Avenue , Kowloon 999077 , Hong Kong , China
- Institute for Smart Materials and Engineering , University of Jinan , Jinan 250022 , Shandong , China
| | - Xiaolin Zhang
- Department of Physics, Department of Materials Science and Engineering, and Department of Biomedical Engineering , City University of Hong Kong , Tat Chee Avenue , Kowloon 999077 , Hong Kong , China
| | - Hongbing Lu
- College of Physics and Information Technology , Shaanxi Normal University , Xi'an 710062 , Shaanxi , China
| | - Kewei Xu
- State Key Laboratory for Mechanical Behavior of Materials , Xi'an Jiaotong University , Xi'an 710049 , Shaanxi , China
- Department of Physics and Opt-electronic Engineering , Xi'an University of Arts and Science , Xi'an 710065 , Shaanxi , China
| | - Paul K Chu
- Department of Physics, Department of Materials Science and Engineering, and Department of Biomedical Engineering , City University of Hong Kong , Tat Chee Avenue , Kowloon 999077 , Hong Kong , China
| | - Fei Ma
- Department of Physics, Department of Materials Science and Engineering, and Department of Biomedical Engineering , City University of Hong Kong , Tat Chee Avenue , Kowloon 999077 , Hong Kong , China
- State Key Laboratory for Mechanical Behavior of Materials , Xi'an Jiaotong University , Xi'an 710049 , Shaanxi , China
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16
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Zhang L, Shi J, Huang Y, Xu H, Xu K, Chu PK, Ma F. Octahedral SnO 2/Graphene Composites with Enhanced Gas-Sensing Performance at Room Temperature. ACS APPLIED MATERIALS & INTERFACES 2019; 11:12958-12967. [PMID: 30848880 DOI: 10.1021/acsami.8b22533] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Although high-energy facets on metal oxides are usually active and preferred for gas sensing, it is difficult to expose them according to thermodynamics. In this work, nanocomposites of SnO2 and graphene are prepared by a hydrothermal method. The SnO2 nanoparticles change from a lance shape to an octahedral shape as the concentration of HCl in the solution is increased gradually from 6.5 to 10 vol %. However, the SnO2 nanoparticles have an elongated octahedral shape if the concentration of HCl is increased further. The octahedral SnO2 nanoparticles are mainly surrounded by high-surface-energy {221} facets, thus facilitating gas sensing. First-principles calculation shows that the surface energy and adsorption energy of the {221} facets are larger than those of the stable {110} facets, and so, the gas adsorption capacity on the {221} facets is better. Furthermore, because the Fermi level of the SnO2{221} facet is higher than that of graphene, the electrons are transferred from SnO2 nanoparticles to graphene sheets, enabling effective electron exchange between the composite and external NO2 gas. The excellent gas-sensing properties of the octahedral SnO2/graphene composites are ascribed to the high-surface-energy {221} facets exposed.
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Affiliation(s)
- Lizhai Zhang
- State Key Laboratory for Mechanical Behavior of Materials , Xi'an Jiaotong University , Xi'an 710049 , Shaanxi , China
- Department of Physics and Department of Materials Science and Engineering , City University of Hong Kong , Tat Chee Avenue , Kowloon 999077 , Hong Kong, China
| | - Junna Shi
- State Key Laboratory for Mechanical Behavior of Materials , Xi'an Jiaotong University , Xi'an 710049 , Shaanxi , China
| | - Yuhong Huang
- College of Physics and Information Technology , Shaanxi Normal University , Xi'an 710062 , Shaanxi , China
| | - Huiyan Xu
- Department of Physics and Department of Materials Science and Engineering , City University of Hong Kong , Tat Chee Avenue , Kowloon 999077 , Hong Kong, China
- Institute for Smart Materials and Engineering , University of Jinan , Jinan 250022 , Shandong , China
| | - Kewei Xu
- State Key Laboratory for Mechanical Behavior of Materials , Xi'an Jiaotong University , Xi'an 710049 , Shaanxi , China
- Department of Physics and Opt-electronic Engineering , Xi'an University of Arts and Science , Xi'an 710065 , Shaanxi , China
| | - Paul K Chu
- Department of Physics and Department of Materials Science and Engineering , City University of Hong Kong , Tat Chee Avenue , Kowloon 999077 , Hong Kong, China
| | - Fei Ma
- State Key Laboratory for Mechanical Behavior of Materials , Xi'an Jiaotong University , Xi'an 710049 , Shaanxi , China
- Department of Physics and Department of Materials Science and Engineering , City University of Hong Kong , Tat Chee Avenue , Kowloon 999077 , Hong Kong, China
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17
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Liu Y, He H, Jiang J, Zhang K, Liu S, He M, Han G, Guo X, Liu W, Li B. Hollow carbonaceous microspheres-reduced graphene oxide enhances lithium storage performance of SnO2-based anode. J SOLID STATE CHEM 2019. [DOI: 10.1016/j.jssc.2018.12.032] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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18
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Krishnan SK, Singh E, Singh P, Meyyappan M, Nalwa HS. A review on graphene-based nanocomposites for electrochemical and fluorescent biosensors. RSC Adv 2019; 9:8778-8881. [PMID: 35517682 PMCID: PMC9062009 DOI: 10.1039/c8ra09577a] [Citation(s) in RCA: 265] [Impact Index Per Article: 53.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2018] [Accepted: 02/15/2019] [Indexed: 12/16/2022] Open
Abstract
Biosensors with high sensitivity, selectivity and a low limit of detection, reaching nano/picomolar concentrations of biomolecules, are important to the medical sciences and healthcare industry for evaluating physiological and metabolic parameters.
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Affiliation(s)
- Siva Kumar Krishnan
- CONACYT-Instituto de Física
- Benemérita Universidad Autónoma de Puebla
- Puebla 72570
- Mexico
| | - Eric Singh
- Department of Computer Science
- Stanford University
- Stanford
- USA
| | - Pragya Singh
- Department of Electrical Engineering and Computer Science
- National Chiao Tung University
- Hsinchu 30010
- Taiwan
| | - Meyya Meyyappan
- Center for Nanotechnology
- NASA Ames Research Center
- Moffett Field
- Mountain View
- USA
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19
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Shankar SS, Shereema RM, Rakhi RB. Electrochemical Determination of Adrenaline Using MXene/Graphite Composite Paste Electrodes. ACS APPLIED MATERIALS & INTERFACES 2018; 10:43343-43351. [PMID: 30465433 DOI: 10.1021/acsami.8b11741] [Citation(s) in RCA: 63] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
MXene/graphite composite paste electrode (MXene/GCPE)-based electrochemical sensor has been fabricated for the detection of adrenaline. The electrode exhibits a sensitive response to adrenaline in phosphate buffer solution of pH 7.4, and its catalytic activity is much higher than that of the bare graphite paste electrode. The electron-transfer reaction of MXene/GCPE is a diffusion controlled process. The graph of concentration of adrenaline with the peak current exhibits two linearities, one in the lower and other in the higher concentration range with a detection limit of 9.5 nM. The simultaneous analyses of adrenaline, ascorbic acid, and serotonin reveal that the fabricated electrode could separate the overlapped cyclic voltammetric peaks of these ternary mixtures. This electrode has been further employed in the detection of adrenaline in pharmaceutical samples with 99.2-100.8% recoveries.
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Affiliation(s)
- S Sharath Shankar
- Chemical Sciences and Technology Division , CSIR-National Institute of Interdisciplinary Science and Technology (CSIR-NIIST) , Thiruvananthapuram , Kerala 695019 , India
- Department of Biochemistry and Molecular Biology, School of Biological Sciences , Central University of Kerala , Kasargod 671314 , India
| | - Rayammarakkar M Shereema
- Chemical Sciences and Technology Division , CSIR-National Institute of Interdisciplinary Science and Technology (CSIR-NIIST) , Thiruvananthapuram , Kerala 695019 , India
| | - R B Rakhi
- Chemical Sciences and Technology Division , CSIR-National Institute of Interdisciplinary Science and Technology (CSIR-NIIST) , Thiruvananthapuram , Kerala 695019 , India
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20
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Cheng C, He S, Zhang C, Du C, Chen W. High-performance supercapacitor fabricated from 3D free-standing hierarchical carbon foam-supported two dimensional porous thin carbon nanosheets. Electrochim Acta 2018. [DOI: 10.1016/j.electacta.2018.08.081] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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21
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Deshmukh MA, Bodkhe GA, Shirsat S, Ramanavicius A, Shirsat MD. Nanocomposite Platform Based on EDTA Modified Ppy/SWNTs for the Sensing of Pb(II) Ions by Electrochemical Method. Front Chem 2018; 6:451. [PMID: 30327766 PMCID: PMC6174202 DOI: 10.3389/fchem.2018.00451] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2018] [Accepted: 09/11/2018] [Indexed: 11/13/2022] Open
Abstract
Heavy metal ions are considered as one of the major water pollutants, revealing health hazards as well as threat to the ecosystem. Therefore, investigation of most versatile materials for the sensitive and selective detection of heavy metal ions is need of the hour. Proposed work emphasizes the synthesis of conducting polymer and carbon nanotube nanocomposite modified with chelating ligand for the detection of heavy metal ions. Carbon nanotubes are having well known features such as tuneable conductivity, low density, good charge transport ability, and current carrying capacity. Conducting polymers are the most reliable materials for sensing applications due to their environmental stability and tuning of conductivity by doping and de-doping. Formation of nanocomposite of these two idealistic materials is advantageous over the individual material, which can help to tackle the individual limitations of these materials and can form versatile materials with ideal chemical and electrical properties. Chelating ligands are the most favorable materials due to their ability of complex formation with metal ions. The present work possesses a sensing platform based on conducting polymer and carbon nanotube nanocomposite, which is stable in various aqueous media and possess good charge transfer ability. Chelating ligands played an important role in the increased selectivity toward metal ions. Moreover, in present investigation Ethylenediaminetetraacetic acid (EDTA) functionalized polypyrrole (Ppy) and single walled carbon nanotubes (SWNTs) nanocomposite was successfully synthesized by electrochemical method on stainless steel electrode (SSE). The electrochemical detection of Pb(II) ions using EDTA-Ppy/SWNTs nanocomposite was done from aqueous media. Cyclic voltammetry technique was utilized for the electrochemical synthesis of Ppy/SWNTs nanocomposite. Ppy/SWNTs nanocomposite was further modified with EDTA using dip coating technique at room temperature. The EDTA-Ppy/SWNTs modified stainless steel electrode (SSE) exhibited good sensitivity and selectivity toward heavy metal ions [Pb(II)]. Detection limit achieved for Pb(II) ions was 0.07 μM.
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Affiliation(s)
- Megha A Deshmukh
- Department of Physics, RUSA-Center for Advanced Sensor Technology, Babasaheb Ambedkar Marathwada University, Aurangabad, India
| | - Gajanan A Bodkhe
- Department of Physics, RUSA-Center for Advanced Sensor Technology, Babasaheb Ambedkar Marathwada University, Aurangabad, India
| | | | - Arunas Ramanavicius
- Department of Physical Chemistry, Faculty of Chemistry and Geosciences, Vilnius University, Vilnius, Lithuania.,Laboratory of Nanotechnology, State Research Institute Center for Physical Sciences and Technology, Vilnius, Lithuania
| | - Mahendra D Shirsat
- Department of Physics, RUSA-Center for Advanced Sensor Technology, Babasaheb Ambedkar Marathwada University, Aurangabad, India
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22
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Yoon J, Lee D, Lee E, Yoon YS, Kim DJ. Ag/ZnO Catalysts with Different ZnO Nanostructures for Non-enzymatic Detection of Urea. ELECTROANAL 2018. [DOI: 10.1002/elan.201800595] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Jaesik Yoon
- Materials Research and Education Center; 275 Wilmore Lab; Auburn University; Auburn, AL 36849 USA
| | - Doohee Lee
- Materials Research and Education Center; 275 Wilmore Lab; Auburn University; Auburn, AL 36849 USA
| | - Eunji Lee
- Materials Research and Education Center; 275 Wilmore Lab; Auburn University; Auburn, AL 36849 USA
| | - Young Soo Yoon
- Department of Chemical and Biological Engineering; Gachon University Gyeonggi-do; 13120 Korea
| | - Dong-Joo Kim
- Materials Research and Education Center; 275 Wilmore Lab; Auburn University; Auburn, AL 36849 USA
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23
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Cui X, Fang X, Zhao H, Li Z, Ren H. Fabrication of thiazole derivatives functionalized graphene decorated with fluorine, chlorine and iodine@SnO2 nanoparticles for highly sensitive detection of heavy metal ions. Colloids Surf A Physicochem Eng Asp 2018. [DOI: 10.1016/j.colsurfa.2018.03.004] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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24
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Pérez-Mitta G, Peinetti AS, Cortez ML, Toimil-Molares ME, Trautmann C, Azzaroni O. Highly Sensitive Biosensing with Solid-State Nanopores Displaying Enzymatically Reconfigurable Rectification Properties. NANO LETTERS 2018; 18:3303-3310. [PMID: 29697265 DOI: 10.1021/acs.nanolett.8b01281] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
Molecular design of biosensors based on enzymatic processes taking place in nanofluidic elements is receiving increasing attention by the scientific community. In this work, we describe the construction of novel ultrasensitive enzymatic nanopore biosensors employing "reactive signal amplifiers" as key elements coupled to the transduction mechanism. The proposed framework offers innovative design concepts not only to amplify the detected ionic signal and develop ultrasensitive nanopore-based sensors but also to construct nanofluidic diodes displaying specific chemo-reversible rectification properties. The integrated approach is demonstrated by electrostatically assembling poly(allylamine) on the anionic pore walls followed by the assembly of urease. We show that the cationic weak polyelectrolyte acts as a "reactive signal amplifier" in the presence of local pH changes induced by the enzymatic reaction. These bioinduced variations in proton concentration ultimately alter the protonation degree of the polyamine resulting in amplifiable, controlled, and reproducible changes in the surface charge of the pore walls, and consequently on the generated ionic signals. The "iontronic" response of the as-obtained devices is fully reversible, and nanopores are reused and assayed with different urea concentrations, thus ensuring reliable design. The limit of detection (LOD) was 1 nM. To the best of our knowledge, this value is the lowest LOD reported to date for enzymatic urea detection. In this context, we envision that this approach based on the use of "reactive signal amplifiers" into solid-state nanochannels will provide new alternatives for the molecular design of highly sensitive nanopore biosensors as well as (bio)chemically addressable nanofluidic elements.
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Affiliation(s)
- Gonzalo Pérez-Mitta
- Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA), Departamento de Química, Facultad de Ciencias Exactas , Universidad Nacional de La Plata (UNLP), CONICET , Boulevard 113 y 64 , 1900 La Plata , Argentina
| | - Ana S Peinetti
- Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA), Departamento de Química, Facultad de Ciencias Exactas , Universidad Nacional de La Plata (UNLP), CONICET , Boulevard 113 y 64 , 1900 La Plata , Argentina
| | - M Lorena Cortez
- Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA), Departamento de Química, Facultad de Ciencias Exactas , Universidad Nacional de La Plata (UNLP), CONICET , Boulevard 113 y 64 , 1900 La Plata , Argentina
| | | | - Christina Trautmann
- GSI Helmholtzzentrum für Schwerionenforschung , 64291 Darmstadt , Germany
- Technische Universität Darmstadt , 64287 Darmstadt , Germany
| | - Omar Azzaroni
- Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA), Departamento de Química, Facultad de Ciencias Exactas , Universidad Nacional de La Plata (UNLP), CONICET , Boulevard 113 y 64 , 1900 La Plata , Argentina
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25
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Facile synthesis of a SnO2@rGO nanohybrid and optimization of its methane-sensing parameters. Talanta 2018; 181:422-430. [DOI: 10.1016/j.talanta.2018.01.015] [Citation(s) in RCA: 52] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2017] [Revised: 01/05/2018] [Accepted: 01/06/2018] [Indexed: 01/08/2023]
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26
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Yao D, He Z, Wen G, Liang A, Jiang Z. A facile and highly sensitive resonance Rayleigh scattering-energy transfer method for urea using a fullerene probe. RSC Adv 2018; 8:29008-29012. [PMID: 35539694 PMCID: PMC9084328 DOI: 10.1039/c8ra05269g] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2018] [Accepted: 07/31/2018] [Indexed: 01/04/2023] Open
Abstract
Under ultrasound conditions, a deep yellow fullerene (C60) colloid was prepared, which exhibits two resonance Rayleigh scattering peaks at 385 nm and 530 nm. Urea was reacted with dimethylglyoxime (DMG) to produce 4,5-dimethyl-2-imidazole ketone (DIK), in the presence of stabilizer thiosemicarbazone (TSC). Resonance Rayleigh scattering energy transfer (RRS-ET) was shown to occur between the donor fullerene and acceptor DIK due to an overlap of the DIK absorption and fullerene RRS peaks. Upon an increase in the urea concentration, the RRS-ET was enhanced and the RRS intensity decreased. The decreased RRS intensity was linear to the urea concentration in the range of 6.66–333.00 nmoL L−1, with a detection limit of 2.0 nmoL L−1. Accordingly, a new and simple RRS-ET method was established for detecting trace levels of urea in foods, with satisfactory results. Under ultrasound conditions, a deep yellow fullerene (C60) colloid was prepared, which exhibits two resonance Rayleigh scattering peaks at 385 nm and 530 nm.![]()
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Affiliation(s)
- Dongmei Yao
- Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection (Guangxi Normal University)
- Ministry of Education
- Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology
- Guilin 541004
- China
| | - Zining He
- Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection (Guangxi Normal University)
- Ministry of Education
- Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology
- Guilin 541004
- China
| | - Guiqing Wen
- Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection (Guangxi Normal University)
- Ministry of Education
- Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology
- Guilin 541004
- China
| | - Aihui Liang
- Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection (Guangxi Normal University)
- Ministry of Education
- Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology
- Guilin 541004
- China
| | - Zhiliang Jiang
- Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection (Guangxi Normal University)
- Ministry of Education
- Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology
- Guilin 541004
- China
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27
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Wang M, Hu B, Yang C, Zhang Z, He L, Fang S, Qu X, Zhang Q. Electrochemical biosensing based on protein-directed carbon nanospheres embedded with SnO x and TiO 2 nanocrystals for sensitive detection of tobramycin. Biosens Bioelectron 2017; 99:176-185. [PMID: 28756323 DOI: 10.1016/j.bios.2017.07.059] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2017] [Revised: 07/23/2017] [Accepted: 07/24/2017] [Indexed: 01/03/2023]
Abstract
A series of nanocomposites comprised of homogeneous mesoporous carbon nanospheres embedded with SnOx (x = 0, 1, or 2) and TiO2 nanocrystals using bovine serum albumin (BSA) as template followed by calcinated at different temperatures (300, 500, 700, and 900°C) were prepared, and were denoted as SnOx@TiO2@mC. Then a novel electrochemical biosensing strategy for detecting tobramycin (TOB) based on the nanocomposites was constructed. The as-prepared SnOx@TiO2@mC nanocomposites not only possess high specific surface area and good electrochemical activity but also exhibit strong bioaffinity with the aptamer strands, therefore, they were applied as the scaffold for anchoring TOB-targeted aptamer and further used to sensitively detect trace TOB in aqueous solutions. By comparing the electrochemical biosensing responses toward TOB detection based on the four SnOx@TiO2@mC nanocomposites, the biosensing system constructed with SnOx@TiO2@mC900 (derived at 900°C) demonstrated the highest determination efficiency, high selectivity, and good stability. In particular, the new proposed aptasensing method based on SnOx@TiO2@mC nanocomposite exhibits considerable potential for the quantitative detection of TOB in the biomedical field.
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Affiliation(s)
- Minghua Wang
- School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, China; Henan Collaborative Innovation Center of Environmental Pollution Control and Ecological Restoration, School of Materials and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou 450001, China
| | - Bin Hu
- Henan Collaborative Innovation Center of Environmental Pollution Control and Ecological Restoration, School of Materials and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou 450001, China
| | - Chuang Yang
- Henan Collaborative Innovation Center of Environmental Pollution Control and Ecological Restoration, School of Materials and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou 450001, China
| | - Zhihong Zhang
- Henan Collaborative Innovation Center of Environmental Pollution Control and Ecological Restoration, School of Materials and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou 450001, China.
| | - Linghao He
- Henan Collaborative Innovation Center of Environmental Pollution Control and Ecological Restoration, School of Materials and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou 450001, China
| | - Shaoming Fang
- Henan Collaborative Innovation Center of Environmental Pollution Control and Ecological Restoration, School of Materials and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou 450001, China
| | - Xiongwei Qu
- School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, China
| | - Qingxin Zhang
- School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, China.
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Cui X, Liu J, Yang A, Fang X, Xiao C, Zhao H, Ren H, Li Z. The synthesis of polyamidoamine modified gold nanoparticles/SnO2/graphene sheets nanocomposite and its application in biosensor. Colloids Surf A Physicochem Eng Asp 2017. [DOI: 10.1016/j.colsurfa.2017.02.030] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Tong L, Qiu F, Zeng T, Long J, Yang J, Wang R, Zhang J, Wang C, Sun T, Yang Y. Recent progress in the preparation and application of quantum dots/graphene composite materials. RSC Adv 2017. [DOI: 10.1039/c7ra08755a] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Quantum dots/graphene (QDs/GR) composite materials show a distinct synergistic effect between the QDs and graphene, which has aroused vast attention toward their unique characteristics in the last few decades.
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Tran TB, Son SJ, Min J. Nanomaterials in label-free impedimetric biosensor: Current process and future perspectives. BIOCHIP JOURNAL 2016. [DOI: 10.1007/s13206-016-0408-0] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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Electrochemical Synthesis of Polypyrrole, Reduced Graphene Oxide, and Gold Nanoparticles Composite and Its Application to Hydrogen Peroxide Biosensor. NANOMATERIALS 2016; 6:nano6110220. [PMID: 28335348 PMCID: PMC5245746 DOI: 10.3390/nano6110220] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/09/2016] [Revised: 11/06/2016] [Accepted: 11/16/2016] [Indexed: 11/17/2022]
Abstract
Here we report a facile eco-friendly one-step electrochemical approach for the fabrication of a polypyrrole (PPy), reduced graphene oxide (RGO), and gold nanoparticles (nanoAu) biocomposite on a glassy carbon electrode (GCE). The electrochemical behaviors of PPy–RGO–nanoAu and its application to electrochemical detection of hydrogen peroxide were investigated by cyclic voltammetry. Graphene oxide and pyrrole monomer were first mixed and casted on the surface of a cleaned GCE. After an electrochemical processing consisting of the electrooxidation of pyrrole monomer and simultaneous electroreduction of graphene oxide and auric ions (Au3+) in aqueous solution, a PPy–RGO–nanoAu biocomposite was synthesized on GCE. Each component of PPy–RGO–nanoAu is electroactive without non-electroactive substance. The obtained PPy–RGO–nanoAu/GCE exhibited high electrocatalytic activity toward hydrogen peroxide, which allows the detection of hydrogen peroxide at a negative potential of about −0.62 V vs. SCE. The amperometric responses of the biosensor displayed a sensitivity of 40 µA/mM, a linear range of 32 µM–2 mM, and a detection limit of 2.7 µM (signal-to-noise ratio = 3) with good stability and acceptable reproducibility and selectivity. The results clearly demonstrate the potential of the as-prepared PPy–RGO–nanoAu biocomposite for use as a highly electroactive matrix for an amperometric biosensor.
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Zhang C, Li L, Ju J, Chen W. Electrochemical Sensor Based on Graphene-Supported Tin Oxide Nanoclusters for Nonenzymatic Detection of Hydrogen Peroxide. Electrochim Acta 2016. [DOI: 10.1016/j.electacta.2016.05.151] [Citation(s) in RCA: 95] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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Tiwari JN, Vij V, Kemp KC, Kim KS. Engineered Carbon-Nanomaterial-Based Electrochemical Sensors for Biomolecules. ACS NANO 2016; 10:46-80. [PMID: 26579616 DOI: 10.1021/acsnano.5b05690] [Citation(s) in RCA: 270] [Impact Index Per Article: 33.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
The study of electrochemical behavior of bioactive molecules has become one of the most rapidly developing scientific fields. Biotechnology and biomedical engineering fields have a vested interest in constructing more precise and accurate voltammetric/amperometric biosensors. One rapidly growing area of biosensor design involves incorporation of carbon-based nanomaterials in working electrodes, such as one-dimensional carbon nanotubes, two-dimensional graphene, and graphene oxide. In this review article, we give a brief overview describing the voltammetric techniques and how these techniques are applied in biosensing, as well as the details surrounding important biosensing concepts of sensitivity and limits of detection. Building on these important concepts, we show how the sensitivity and limit of detection can be tuned by including carbon-based nanomaterials in the fabrication of biosensors. The sensing of biomolecules including glucose, dopamine, proteins, enzymes, uric acid, DNA, RNA, and H2O2 traditionally employs enzymes in detection; however, these enzymes denature easily, and as such, enzymeless methods are highly desired. Here we draw an important distinction between enzymeless and enzyme-containing carbon-nanomaterial-based biosensors. The review ends with an outlook of future concepts that can be employed in biosensor fabrication, as well as limitations of already proposed materials and how such sensing can be enhanced. As such, this review can act as a roadmap to guide researchers toward concepts that can be employed in the design of next generation biosensors, while also highlighting the current advancements in the field.
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Affiliation(s)
- Jitendra N Tiwari
- Center for Superfunctional Materials, Department of Chemistry, Ulsan National Institute of Science and Technology (UNIST) , Ulsan 689-798, Korea
| | - Varun Vij
- Center for Superfunctional Materials, Department of Chemistry, Ulsan National Institute of Science and Technology (UNIST) , Ulsan 689-798, Korea
| | - K Christian Kemp
- Center for Superfunctional Materials, Department of Chemistry, Ulsan National Institute of Science and Technology (UNIST) , Ulsan 689-798, Korea
| | - Kwang S Kim
- Center for Superfunctional Materials, Department of Chemistry, Ulsan National Institute of Science and Technology (UNIST) , Ulsan 689-798, Korea
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Wang Z, Dai Z. Carbon nanomaterial-based electrochemical biosensors: an overview. NANOSCALE 2015; 7:6420-31. [PMID: 25805626 DOI: 10.1039/c5nr00585j] [Citation(s) in RCA: 199] [Impact Index Per Article: 22.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
Carbon materials on the nanoscale exhibit diverse outstanding properties, rendering them extremely suitable for the fabrication of electrochemical biosensors. Over the past two decades, advances in this area have continuously emerged. In this review, we attempt to survey the recent developments of electrochemical biosensors based on six types of carbon nanomaterials (CNs), i.e., graphene, carbon nanotubes, carbon dots, carbon nanofibers, nanodiamonds and buckminsterfullerene. For each material, representative samples are introduced to expound the different roles of the CNs in electrochemical bioanalytical strategies. In addition, remaining challenges and perspectives for future developments are also briefly discussed.
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Affiliation(s)
- Zhaoyin Wang
- Jiangsu Collaborative Innovation Center of Biomedical Functional Materials and Jiangsu Key Laboratory of Biofunctional Materials, College of Chemistry and Materials Science, Nanjing Normal University, Nanjing, 210023, P. R. China.
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Lee JH, Katoch A, Choi SW, Kim JH, Kim HW, Kim SS. Extraordinary improvement of gas-sensing performances in SnO2 nanofibers due to creation of local p-n heterojunctions by loading reduced graphene oxide nanosheets. ACS APPLIED MATERIALS & INTERFACES 2015; 7:3101-3109. [PMID: 25602688 DOI: 10.1021/am5071656] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
We propose a novel approach to improve the gas-sensing properties of n-type nanofibers (NFs) that involves creation of local p-n heterojunctions with p-type reduced graphene oxide (RGO) nanosheets (NSs). This work investigates the sensing behaviors of n-SnO2 NFs loaded with p-RGO NSs as a model system. n-SnO2 NFs demonstrated greatly improved gas-sensing performances when loaded with an optimized amount of p-RGO NSs. Loading an optimized amount of RGOs resulted in a 20-fold higher sensor response than that of pristine SnO2 NFs. The sensing mechanism of monolithic SnO2 NFs is based on the joint effects of modulation of the potential barrier at nanograin boundaries and radial modulation of the electron-depletion layer. In addition to the sensing mechanisms described above, enhanced sensing was obtained for p-RGO NS-loaded SnO2 NFs due to creation of local p-n heterojunctions, which not only provided a potential barrier, but also functioned as a local electron absorption reservoir. These mechanisms markedly increased the resistance of SnO2 NFs, and were the origin of intensified resistance modulation during interaction of analyte gases with preadsorbed oxygen species or with the surfaces and grain boundaries of NFs. The approach used in this work can be used to fabricate sensitive gas sensors based on n-type NFs.
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Affiliation(s)
- Jae-Hyoung Lee
- Department of Materials Science and Engineering, Inha University , Incheon 402-751, Republic of Korea
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Li L, He S, Liu M, Zhang C, Chen W. Three-dimensional mesoporous graphene aerogel-supported SnO2 nanocrystals for high-performance NO2 gas sensing at low temperature. Anal Chem 2015; 87:1638-45. [PMID: 25556377 DOI: 10.1021/ac503234e] [Citation(s) in RCA: 248] [Impact Index Per Article: 27.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
A facile and cost-efficient hydrothermal and lyophilization two-step strategy has been developed to prepare three-dimensional (3D) SnO2/rGO composites as NO2 gas sensor. In the present study, two different metal salt precursors (Sn(2+) and Sn(4+)) were used to prepare the 3D porous composites. It was found that the products prepared from different tin salts exhibited different sensing performance for NO2 detection. The scanning electron microscopy and transmission electron microscopy characterizations clearly show the macroporous 3D hybrids, nanoporous structure of reduce graphene oxide (rGO), and the supported SnO2 nanocrystals with an average size of 2-7 nm. The specific surface area and porosity properties of the 3D mesoporous composites were analyzed by Braunauer-Emmett-Teller method. The results showed that the SnO2/rGO composite synthesized from Sn(4+) precursor (SnO2/rGO-4) has large surface area (441.9 m(2)/g), which is beneficial for its application as a gas sensing material. The gas sensing platform fabricated from the SnO2/rGO-4 composite exhibited a good linearity for NO2 detection, and the limit of detection was calculated to be as low as about 2 ppm at low temperature. The present work demonstrates that the 3D mesoporous SnO2/rGO composites with extremely large surface area and stable nanostructure are excellent candidate materials for gas sensing.
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Affiliation(s)
- Lei Li
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences , Changchun 130022, People's Republic of China
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37
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Zhao X, Gao J, He X, Cong L, Zhao H, Li X, Tan F. DNA-modified graphene quantum dots as a sensing platform for detection of Hg2+in living cells. RSC Adv 2015. [DOI: 10.1039/c5ra06984j] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A facile method for detection of Hg2+in living cells based on DNA modified graphene quantum dots.
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Affiliation(s)
- Xin Zhao
- Key Laboratory of Industrial Ecology and Environmental Engineering (MOE)
- School of Environmental Science and Technology
- Dalian University of Technology
- Dalian 116024
- China
| | - Jinsuo Gao
- Key Laboratory of Industrial Ecology and Environmental Engineering (MOE)
- School of Environmental Science and Technology
- Dalian University of Technology
- Dalian 116024
- China
| | - Xin He
- Key Laboratory of Industrial Ecology and Environmental Engineering (MOE)
- School of Environmental Science and Technology
- Dalian University of Technology
- Dalian 116024
- China
| | - Longchao Cong
- Key Laboratory of Industrial Ecology and Environmental Engineering (MOE)
- School of Environmental Science and Technology
- Dalian University of Technology
- Dalian 116024
- China
| | - Huimin Zhao
- Key Laboratory of Industrial Ecology and Environmental Engineering (MOE)
- School of Environmental Science and Technology
- Dalian University of Technology
- Dalian 116024
- China
| | - Xiaoyu Li
- School of Life Science and Biotechnology
- Dalian University of Technology
- Dalian 116024
- China
| | - Feng Tan
- Key Laboratory of Industrial Ecology and Environmental Engineering (MOE)
- School of Environmental Science and Technology
- Dalian University of Technology
- Dalian 116024
- China
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