1
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Moosavi R, Alizadeh N. Silver Nanoclusters as Label Free Non-enzymatic Fast Glucose Assay with the Fluorescent Enhancement Signal. J Fluoresc 2024; 34:1865-1876. [PMID: 37656303 DOI: 10.1007/s10895-023-03407-9] [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] [Received: 07/08/2023] [Accepted: 08/16/2023] [Indexed: 09/02/2023]
Abstract
A simple and low-cost green preparation method was used for BSA capped silver nanoclusters (BSA-Ag NCs) as turn on fluorescent probe for glucose. Non-enzymatic fast glucose detection assay with a widest concentration range was proposed which requires neither nanoclusters (NCs) modification nor complicated enzyme immobilization. The DLS analysis, HRTEM patterns, fluorescence and UV-visible measurement well supported the synthesis product. The advantages of the fabricated glucose sensor based on fluorescence increasing of probe compared to other established optical techniques was inspected and summarized as well. The glucose sensor exhibited a high sensitivity, fast response time (in seconds), satisfactory selectivity, well stability (at least two months), low detection limit (31 µmol L- 1) and a wide concentration response (three orders of magnitudes) to glucose between 0.1 and 92 mmol L- 1 as calibration plot. A theoretical model of the sensing mechanism based on the binding interaction of glucose to BSA-Ag NCs is proposed and data fitting demonstrated a good agreement between the experimental and theoretically calculated fluorescence data. The facile preparation and excellent sensing performance of BSA-Ag NCs in the real samples (plasma and juice) make sure that synthesized probe material is a promising candidate for advanced enzyme-free glucose sensing approach.
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Affiliation(s)
- Razieh Moosavi
- Departmentof Chemistry, Faculty of Basic Sciences, Tarbiat Modares University, P.O. Box 14115-175, Tehran, Iran
| | - Naader Alizadeh
- Departmentof Chemistry, Faculty of Basic Sciences, Tarbiat Modares University, P.O. Box 14115-175, Tehran, Iran.
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2
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Draviana HT, Fitriannisa I, Khafid M, Krisnawati DI, Widodo, Lai CH, Fan YJ, Kuo TR. Size and charge effects of metal nanoclusters on antibacterial mechanisms. J Nanobiotechnology 2023; 21:428. [PMID: 37968705 PMCID: PMC10648733 DOI: 10.1186/s12951-023-02208-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2023] [Accepted: 11/08/2023] [Indexed: 11/17/2023] Open
Abstract
Nanomaterials, specifically metal nanoclusters (NCs), are gaining attention as a promising class of antibacterial agents. Metal NCs exhibit antibacterial properties due to their ultrasmall size, extensive surface area, and well-controlled surface ligands. The antibacterial mechanisms of metal NCs are influenced by two primary factors: size and surface charge. In this review, we summarize the impacts of size and surface charge of metal NCs on the antibacterial mechanisms, their interactions with bacteria, and the factors that influence their antibacterial effects against both gram-negative and gram-positive bacteria. Additionally, we highlight the mechanisms that occur when NCs are negatively or positively charged, and provide examples of their applications as antibacterial agents. A better understanding of relationships between antibacterial activity and the properties of metal NCs will aid in the design and synthesis of nanomaterials for the development of effective antibacterial agents against bacterial infections. Based on the remarkable achievements in the design of metal NCs, this review also presents conclusions on current challenges and future perspectives of metal NCs for both fundamental investigations and practical antibacterial applications.
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Affiliation(s)
- Hanny Tika Draviana
- Graduate Institute of Nanomedicine and Medical Engineering, College of Biomedical Engineering, Taipei Medical University, Taipei, 11031, Taiwan
- International PhD Program in Biomedical Engineering, College of Biomedical Engineering, Taipei Medical University, Taipei, 11031, Taiwan
| | - Istikhori Fitriannisa
- Graduate Institute of Nanomedicine and Medical Engineering, College of Biomedical Engineering, Taipei Medical University, Taipei, 11031, Taiwan
- International PhD Program in Biomedical Engineering, College of Biomedical Engineering, Taipei Medical University, Taipei, 11031, Taiwan
| | - Muhamad Khafid
- Department of Nursing, Faculty of Nursing and Midwivery, Universitas Nahdlatul Ulama Surabaya, Surabaya, 60237, East Java, Indonesia
| | - Dyah Ika Krisnawati
- Dharma Husada Nursing Academy, Kediri, 64117, East Java, Indonesia
- Department of Health Analyst, Faculty of Health, Universitas Nahdlatul Ulama Surabaya, Surabaya, 60237, East Java, Indonesia
| | - Widodo
- Sekolah Tinggi Teknologi Pomosda, Nganjuk, 64483, East Java, Indonesia
| | - Chien-Hung Lai
- Department of Physical Medicine and Rehabilitation, School of Medicine, College of Medicine, Taipei Medical University, Taipei, 11031, Taiwan.
- Department of Physical Medicine and Rehabilitation, Taipei Medical University Hospital, Taipei, 11031, Taiwan.
- Taipei Neuroscience Institute, Taipei Medical University, Taipei, 11031, Taiwan.
| | - Yu-Jui Fan
- International PhD Program in Biomedical Engineering, College of Biomedical Engineering, Taipei Medical University, Taipei, 11031, Taiwan.
- School of Biomedical Engineering, Taipei Medical University, Taipei, 11031, Taiwan.
- Center for Precision Health and Quantitative Sciences, Taipei Medical University Hospital, Taipei, 11031, Taiwan.
| | - Tsung-Rong Kuo
- Graduate Institute of Nanomedicine and Medical Engineering, College of Biomedical Engineering, Taipei Medical University, Taipei, 11031, Taiwan.
- International PhD Program in Biomedical Engineering, College of Biomedical Engineering, Taipei Medical University, Taipei, 11031, Taiwan.
- Precision Medicine and Translational Cancer Research Center, Taipei Medical University Hospital, Taipei, 11031, Taiwan.
- Stanford Byers Center for Biodesign, Stanford University, Stanford, CA, 94305, USA.
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3
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Shahrashoob M, Hosseinkhani S, Jafary H, Hosseini M, Molaabasi F. Dual-emissive phenylalanine dehydrogenase-templated gold nanoclusters as a new highly sensitive label-free ratiometric fluorescent probe: heavy metal ions and thiols measurement with live-cell imaging. RSC Adv 2023; 13:21655-21666. [PMID: 37476045 PMCID: PMC10354591 DOI: 10.1039/d3ra03179a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2023] [Accepted: 06/20/2023] [Indexed: 07/22/2023] Open
Abstract
Phenylalanine dehydrogenase (PheDH) has been proposed as an ideal protein scaffold for the one-step and green synthesis of highly efficient multifunctional gold nanoclusters. The PheDH-stabilized fluorescent gold nanoclusters (PheDH-AuNCs) with dual emission/single excitation exhibited excellent and long-term stability, high water solubility, large Stokes shift and intense photoluminescence. Selectivity studies demonstrated that the red fluorescence emission intensity of PheDH-AuNCs was obviously decreased in less than 10 min by the addition of mercury, copper, cysteine or glutathione under the single excitation at 360 nm, without significant change in the blue emission of the PheDH-AuNCs. Therefore, the as-prepared PheDH-AuNCs as a new excellent fluorescent probe were successfully employed to develop a simple, rapid, low cost, label- and surface modification-free nanoplatform for the ultrasensitive and selective detection of Hg2+, Cu2+, Cys and GSH through a ratiometric fluorescence system with wide linear ranges and detection limits of 1.6, 2.4, 160 and 350 nM, respectively which were lower than previous reports. In addition, the results showed that PheDH-AuNCs can be used for the detection of toxic heavy metal ions and small biomarker thiols in biological and aqueous samples with acceptable recoveries. Interestingly, PheDH-AuNCs also displayed a promising potential for live-cell imaging due to their low toxicity and great chemical- and photo-stability.
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Affiliation(s)
- Mahsa Shahrashoob
- Department of Biology, Science and Research Branch, Islamic Azad University Tehran Iran
| | - Saman Hosseinkhani
- Department of Biochemistry, Faculty of Biological Sciences, Tarbiat Modares University Tehran Iran
| | - Hanieh Jafary
- Department of Biology, Science and Research Branch, Islamic Azad University Tehran Iran
| | - Morteza Hosseini
- Department of Life Science Engineering, Faculty of New Sciences & Technologies, University of Tehran Tehran Iran
| | - Fatemeh Molaabasi
- Department of Interdisciplinary Technologies, Breast Cancer Research Center, Biomaterials and Tissue Engineering Research Group, Motamed Cancer Institute, ACECR Tehran Iran
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4
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Cun X, Jansman MMT, Liu X, Boureau V, Thulstrup PW, Hosta-Rigau L. Hemoglobin-stabilized gold nanoclusters displaying oxygen transport ability, self-antioxidation, auto-fluorescence properties and long-term storage potential. RSC Adv 2023; 13:15540-15553. [PMID: 37228685 PMCID: PMC10203863 DOI: 10.1039/d3ra00689a] [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: 02/01/2023] [Accepted: 05/12/2023] [Indexed: 05/27/2023] Open
Abstract
The development of hemoglobin (Hb)-based oxygen carriers (HBOCs) holds a lot of potential to overcome important drawbacks of donor blood such as a short shelf life or the potential risk of infection. However, a crucial limitation of current HBOCs is the autoxidation of Hb into methemoglobin (metHb), which lacks oxygen-carrying capacity. Herein, we address this challenge by fabricating a Hb and gold nanoclusters (AuNCs) composite (Hb@AuNCs) which preserves the exceptional features of both systems. Specifically, the Hb@AuNCs retain the oxygen-transporting properties of Hb, while the AuNCs provide antioxidant functionality as shown by their ability to catalytically deplete harmful reactive oxygen species (ROS). Importantly, these ROS-scavenging properties translate into antioxidant protection by minimizing the autoxidation of Hb into non-functional metHb. Furthermore, the AuNCs render Hb@AuNCs with auto-fluorescence properties which could potentially allow them to be monitored once administered into the body. Last but not least, these three features (i.e., oxygen transport, antioxidant and fluorescence properties) are well maintained following storage as a freeze-dried product. Thus, overall, the as-prepared Hb@AuNCs hold the potential to be used as a multifunctional blood surrogate in the near future.
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Affiliation(s)
- Xingli Cun
- DTU Health Tech, Center for Nanomedicine and Theranostics, Technical University of Denmark Nils Koppels Allé, Building 423 2800 Kgs. Lyngby Denmark
| | - Michelle M T Jansman
- DTU Health Tech, Center for Nanomedicine and Theranostics, Technical University of Denmark Nils Koppels Allé, Building 423 2800 Kgs. Lyngby Denmark
| | - Xiaoli Liu
- DTU Health Tech, Center for Nanomedicine and Theranostics, Technical University of Denmark Nils Koppels Allé, Building 423 2800 Kgs. Lyngby Denmark
| | - Victor Boureau
- Interdisciplinary Center for Electron Microscopy (CIME), École Polytechnique Fédérale de Lausanne CH-1015 Lausanne Switzerland
| | - Peter W Thulstrup
- Department of Chemistry, University of Copenhagen Universitetsparken 5 2100 Copenhagen Denmark
| | - Leticia Hosta-Rigau
- DTU Health Tech, Center for Nanomedicine and Theranostics, Technical University of Denmark Nils Koppels Allé, Building 423 2800 Kgs. Lyngby Denmark
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5
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Lu J, Wang D, Li X, Guo W, Tian C, Luan F, Zhuang X. Preparation of a Red-Emitting, Chitosan-Stabilized Copper Nanocluster Composite and Its Application as a Hydrogen Peroxide Detection Probe in the Analysis of Water Samples. BIOSENSORS 2023; 13:361. [PMID: 36979573 PMCID: PMC10046763 DOI: 10.3390/bios13030361] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/25/2023] [Revised: 02/27/2023] [Accepted: 03/06/2023] [Indexed: 06/18/2023]
Abstract
Hydrogen peroxide (H2O2) is an important reactive oxygen species that mediates a variety of physiological functions in biological processes, and it is an essential mediator in food, pharmaceutical, and environmental analysis. However, H2O2 can be dangerous and toxic at certain concentrations. It is crucial to detect the concentration of H2O2 in the environment for human health and environmental protection. Herein, we prepared the red-emitting copper nanoclusters (Cu NCs) by a one-step method, with lipoic acid (LA) and sodium borohydride as protective ligands and reducing agents, respectively, moreover, adding chitosan (CS) to wrap LA-Cu NCs. The as-prepared LA-Cu NCs@CS have stronger fluorescence than LA-Cu NCs. We found that the presence of H2O2 causes the fluorescence of LA-Cu NCs@CS to be strongly quenched. Based on this, a fluorescent probe based on LA-Cu NCs@CS was constructed for the detection of H2O2 with a limit of detection of 47 nM. The results from this research not only illustrate that the as--developed fluorescent probe exhibits good selectivity and high sensitivity to H2O2 in environmental water samples but also propose a novel strategy to prepare red-emitting copper nanoclusters (Cu NCs) by a one-step method.
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Affiliation(s)
- Jiaojiao Lu
- College of Chemistry and Chemical Engineering, Yantai University, Yantai 264005, China
| | - Dawei Wang
- College of Chemistry and Chemical Engineering, Yantai University, Yantai 264005, China
| | - Xin Li
- College of Chemistry and Chemical Engineering, Yantai University, Yantai 264005, China
| | - Wei Guo
- Shandong Dyne Marine Biopharmaceutical Co., Ltd., Weihai 264300, China
| | - Chunyuan Tian
- College of Chemistry and Chemical Engineering, Yantai University, Yantai 264005, China
| | - Feng Luan
- College of Chemistry and Chemical Engineering, Yantai University, Yantai 264005, China
| | - Xuming Zhuang
- College of Chemistry and Chemical Engineering, Yantai University, Yantai 264005, China
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6
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Patra S, Purohit SS, Swain SK. In vivo fluorescence non-enzymatic glucose sensing technique for diabetes management by CQDs incorporated dextran nanocomposites in human blood serums. Microchem J 2023. [DOI: 10.1016/j.microc.2023.108646] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/19/2023]
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7
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Ebrahimi M, Norouzi P, Aazami H, Moosavi-Movahedi AA. Review on oxidative stress relation on COVID-19: Biomolecular and bioanalytical approach. Int J Biol Macromol 2021; 189:802-818. [PMID: 34418419 PMCID: PMC8372478 DOI: 10.1016/j.ijbiomac.2021.08.095] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2021] [Revised: 08/08/2021] [Accepted: 08/12/2021] [Indexed: 02/07/2023]
Abstract
COVID-19 disease has put life of people in stress worldwide from many aspects. Since the virus has mutated in absolutely short period of time the challenge to find a suitable vaccine has become harder. Infection to COVID-19, especially at severe life threatening states is highly dependent on the strength of the host immune system. This system is partially dependent on the balance between oxidative stress and antioxidant. Besides, this virus still has unknown mechanism of action companied by a probable commune period. From another hand, some reactive oxygen species (ROS) levels can be helpful on the state determination of the disease. Thus it could be possible to use modern bioanalytical techniques for their detection and determination, which could indicate the disease state at the golden time window since they have the potential to show whether specific DNA, RNA, enzymes and proteins are affected. This also could be used as a preclude study or a reliable pathway to define the best optimized time of cure beside effective medical actions. Herein, some ROS and their relation with SARS-CoV-2 virus have been considered. In addition, modern bioelectroanalytical techniques on this approach from quantitative and qualitative points of view have been reviewed.
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Affiliation(s)
- Mehrnaz Ebrahimi
- Center of Excellence in Electrochemistry, School of Chemistry, College of Science, University of Tehran, Tehran, Iran
| | - Parviz Norouzi
- Center of Excellence in Electrochemistry, School of Chemistry, College of Science, University of Tehran, Tehran, Iran.
| | - Hossein Aazami
- Endocrinology and Metabolism Research Center, Endocrinology and Metabolism Clinical Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran
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8
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Shin JH, Lee MJ, Choi JH, Song JA, Kim TH, Oh BK. Electrochemical H 2O 2 biosensor based on horseradish peroxidase encapsulated protein nanoparticles with reduced graphene oxide-modified gold electrode. NANO CONVERGENCE 2020; 7:39. [PMID: 33330946 PMCID: PMC7744559 DOI: 10.1186/s40580-020-00249-0] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/20/2020] [Accepted: 12/06/2020] [Indexed: 05/28/2023]
Abstract
In this study, an electrochemical biosensor composed of a horseradish peroxidase (HRP)-encapsulated protein nanoparticles (HEPNP) was fabricated for the sensitive and selective detection of H2O2. The HEPNP has a three-dimensional structure that can contain a large amount of HRP; therefore, HEPNP can amplify the electrochemical signals necessary for the detection of H2O2. Furthermore, reduced graphene oxide (rGO) was used to increase the efficiency of electron transfer from the HEPNP to an electrode, which could enhance the electrochemical signal. This biosensor showed a sensitive electrochemical performance for detection of H2O2 with signals in the range from 0.01-100 μM, and it could detect low concentrations up to 0.01 μM. Furthermore, this biosensor was operated against interferences from glucose, ascorbic acid, and uric acid. In addition, this fabricated H2O2 biosensor showed selective detection performance in human blood serum. Therefore, the proposed biosensor could promote the sensitive and selective detection of H2O2 in clinical applications.
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Affiliation(s)
- Jeong-Hyeop Shin
- Department of Chemical & Biomolecular Engineering, Sogang University, Mapo-Gu, Seoul, 04107, South Korea
| | - Myeong-Jun Lee
- Department of Chemical & Biomolecular Engineering, Sogang University, Mapo-Gu, Seoul, 04107, South Korea
| | - Jin-Ha Choi
- Department of Chemical & Biomolecular Engineering, Sogang University, Mapo-Gu, Seoul, 04107, South Korea
| | - Ji-Ae Song
- Department of Chemical & Biomolecular Engineering, Sogang University, Mapo-Gu, Seoul, 04107, South Korea
| | - Tae-Hwan Kim
- Department of Chemical & Biomolecular Engineering, Sogang University, Mapo-Gu, Seoul, 04107, South Korea
| | - Byung-Keun Oh
- Department of Chemical & Biomolecular Engineering, Sogang University, Mapo-Gu, Seoul, 04107, South Korea.
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9
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Hemoglobin-Conjugated Gold Nanoclusters for Qualitative Analysis of Haptoglobin Phenotypes. Polymers (Basel) 2020; 12:polym12102242. [PMID: 33003451 PMCID: PMC7601242 DOI: 10.3390/polym12102242] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2020] [Revised: 09/23/2020] [Accepted: 09/26/2020] [Indexed: 12/29/2022] Open
Abstract
Designing a facile and rapid detection method for haptoglobin (Hp) phenotypes in human blood plasma is urgently needed to meet clinic requirements in hemolysis theranostics. In this work, a novel approach to qualitatively analyze Hp phenotypes was developed using a fluorescent probe of gold nanoclusters (AuNCs). Hemoglobin-conjugated (Hb)-AuNCs were successfully synthesized with blue-green fluorescence and high biocompatibility via one-pot synthesis. The fluorescence of Hb-AuNCs comes from the ligand-metal charge transfer between surface ligands of Hb and the gold cores with high oxidation states. The biocompatibility assays including cell viability and fluorescence imaging, demonstrated high biocompatibility of Hb-AuNCs. For the qualitative analysis, three Hp phenotypes in plasma, Hp 1-1, Hp 2-1, and Hp 2-2, were successfully discriminated according to changes in the fluorescence intensity and peak position of the maximum intensity of Hb-AuNCs. Our work provides a practical method with facile and rapid properties for the qualitative analysis of three Hp phenotypes in human blood plasma.
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10
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Zhao Y, Zhou H, Zhang S, Xu J. The synthesis of metal nanoclusters and their applications in bio-sensing and imaging. Methods Appl Fluoresc 2019; 8:012001. [PMID: 31726445 DOI: 10.1088/2050-6120/ab57e7] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Noble metal nanomaterials have been studied by many researchers for their ultra-small size, excellent photophysical properties and good biocompatibility. Metal nanoclusters are a kind of nanoscale ultrafine particle, which have completely different properties from macroscopic metals. In the visible region, they do not usually show the characteristic surface plasmon resonance absorption but instead show fluorescence in the visible to near infrared region. In particular, the noble metallic (Au, Ag, Cu, etc) nanoclusters (NMNCs) have broad application prospects in the field of biomedicine as probes for fluorescence sensing. Their strong photoluminescence, living cell compatibility, and easy availability make up for the shortcomings of traditional fluorescent probes such as organic fluorescent dyes, fluorescent proteins, and fluorescent quantum dots. In this review, we summarize the synthetic method and application of metal nanoclusters as fluorescent probes in bio-sensing and imaging, especially in the early diagnosis of cancer cells.
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Affiliation(s)
- Yu Zhao
- State Key Laboratory of Precision Spectroscopy, East China Normal University, 3663 North Zhongshan Road, Shanghai 200062, People's Republic of China
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11
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Sarparast M, Molaabasi F, Ghazfar R, Ashtiani MM, Qarai MB, Taherpour A(A, Amyab SP, Shamsipur M. Efficient ethanol oxidation by hemoglobin-capped gold nanoclusters: The critical role of Fe in the heme group as an oxophilic metal active site. Electrochem commun 2019. [DOI: 10.1016/j.elecom.2019.05.004] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
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12
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Babaee E, Barati A, Gholivand MB, Taherpour AA, Zolfaghar N, Shamsipur M. Determination of Hg 2+ and Cu 2+ ions by dual-emissive Ag/Au nanocluster/carbon dots nanohybrids: Switching the selectivity by pH adjustment. JOURNAL OF HAZARDOUS MATERIALS 2019; 367:437-446. [PMID: 30611036 DOI: 10.1016/j.jhazmat.2018.12.104] [Citation(s) in RCA: 51] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/17/2018] [Revised: 12/07/2018] [Accepted: 12/26/2018] [Indexed: 05/16/2023]
Abstract
An innovative dual-emissive ratiometric nanohybrid probe comprised of red-emitting a (Ag/Au)@insulin nanoclusters (NCs) and blue-emitting carbon dots (CDs) was designed for sensitive and selective ratiometric determination of Hg2+ and Cu2+ ions.The fluorescence intensity of CDs (λex = 340 nm; λem = 420 nm) was unaffected in the presence of the metal ions tested, whereas the red emitting NCs (λex = 340 nm; λem = 640 nm) was strongly quenched by both Cu2+ and Hg2+ ions. Interestingly, the selectivity of the probe toward these two ions was simply switched by controlling the pH of probe solution without using any chelating agent. The probe selectively responded to Hg2+ ions at acidic condition (pH = 4.0), Cu2+ ions at basic condition (pH = 10.0), and Hg2+-Cu2+ mixtures at pHs within this range. The respective detection limitsfor determination of Cu2+ and Hg2+ ions at their specific pH conditions were estimated as 5 nM and 7 nM, over linear ranges of 20-600 nM and 20-2000 nM, respectively. The fabricated ratiometric probe also showed distinguished fluorescence color changes to visual detection of these ions. Finally, the probe was successfully applied to determination of Hg2+ and Cu2+ ions in tap and mineral water samples.
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Affiliation(s)
- Elaheh Babaee
- Department of Chemistry, Razi University, Kermanshah, Iran
| | - Ali Barati
- Department of Chemistry, Razi University, Kermanshah, Iran
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13
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Tian R, Zhang B, Zhao M, Ma Q, Qi Y. Polyoxometalates as promising enzyme mimics for the sensitive detection of hydrogen peroxide by fluorometric method. Talanta 2018; 188:332-338. [DOI: 10.1016/j.talanta.2018.05.085] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2018] [Revised: 05/17/2018] [Accepted: 05/24/2018] [Indexed: 10/16/2022]
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14
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Molaabasi F, Sarparast M, Shamsipur M, Irannejad L, Moosavi-Movahedi AA, Ravandi A, Hajipour Verdom B, Ghazfar R. Shape-Controlled Synthesis of Luminescent Hemoglobin Capped Hollow Porous Platinum Nanoclusters and their Application to Catalytic Oxygen Reduction and Cancer Imaging. Sci Rep 2018; 8:14507. [PMID: 30267025 PMCID: PMC6162304 DOI: 10.1038/s41598-018-32918-w] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2018] [Accepted: 09/18/2018] [Indexed: 12/19/2022] Open
Abstract
Engineering hollow and porous platinum nanostructures using biomolecular templates is currently a significant focus for the enhancement of their facet-dependent optical, electronic, and electrocatalytic properties. However, remains a formidable challenge due to lack of appropriate biomolecules to have a structure-function relationship with nanocrystal facet development. Herein, human hemoglobin found to have facet-binding abilities that can control the morphology and optical properties of the platinum nanoclusters (Pt NCs) by regulation of the growth kinetics in alkaline media. Observations revealed the growth of unusual polyhedra by shape-directed nanocluster attachment along a certain orientation accompanied by Ostwald ripening and, in turn, yield well-dispersed hollow single-crystal nanotetrahedrons, which can easily self-aggregated and crystallized into porous and polycrystalline microspheres. The spontaneous, biobased organization of Pt NCs allow the intrinsic aggregation-induced emission (AIE) features in terms of the platinophilic interactions between Pt(II)-Hb complexes on the Pt(0) cores, thereby controlling the degree of aggregation and the luminescent intensity of Pt(0)@Pt(II)−Hb core−shell NCs. The Hb-Pt NCs exhibited high-performance electrocatalytic oxygen reduction providing a fundamental basis for outstanding catalytic enhancement of Hb-Pt catalysts based on morphology dependent and active site concentration for the four-electron reduction of oxygen. The as-prepared Hb-Pt NCs also exhibited high potential to use in cellular labeling and imaging thanks to the excellent photostability, chemical stability, and low cytotoxicity.
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Affiliation(s)
- Fatemeh Molaabasi
- Department of Biomaterials and Tissue Engineering, Breast Cancer Research Center, Motamed Cancer Institute, ACECR, Tehran, Iran. .,Department of Chemistry, Faculty of Basic Sciences, Tarbiat Modares University, Tehran, 14115-175, Iran.
| | - Morteza Sarparast
- Department of Chemistry, Michigan State University, East Lansing, Michigan, 48824-1322, United States
| | - Mojtaba Shamsipur
- Department of Chemistry, Faculty of Basic Sciences, Razi University, Kermanshah, Iran.
| | - Leila Irannejad
- Department of Chemistry, Faculty of Basic Sciences, Tarbiat Modares University, Tehran, 14115-175, Iran
| | | | - Abouzar Ravandi
- Department of Chemistry, Faculty of Basic Sciences, Sharif University of Technology, Tehran, Iran
| | - Behnam Hajipour Verdom
- Department of Biophysics, Faculty of Biological Sciences, Tarbiat Modares University, Tehran, 14115-154, Iran
| | - Reza Ghazfar
- Department of Chemistry, Michigan State University, East Lansing, Michigan, 48824-1322, United States
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15
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Zhu Z, Xu J, Xue H, Li J. Facile Fabrication of Highly Porous Bioelectrode Membrane by Combining Breath Figure Process and Self-Assembly Process with Amphiphilic Diblock Copolymer and Hydrophilic Biocatalyst. ACS APPLIED BIO MATERIALS 2018; 1:903-909. [DOI: 10.1021/acsabm.8b00332] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Zhengxi Zhu
- School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, Jiangsu 225002, China
| | - Jiaqi Xu
- School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, Jiangsu 225002, China
| | - Huaiguo Xue
- School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, Jiangsu 225002, China
| | - Jie Li
- School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, Jiangsu 225002, China
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16
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Wang B, Shen J, Huang Y, Liu Z, Zhuang H. Graphene Quantum Dots and Enzyme-Coupled Biosensor for Highly Sensitive Determination of Hydrogen Peroxide and Glucose. Int J Mol Sci 2018; 19:E1696. [PMID: 29875333 PMCID: PMC6032169 DOI: 10.3390/ijms19061696] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2018] [Revised: 05/25/2018] [Accepted: 05/28/2018] [Indexed: 12/21/2022] Open
Abstract
In this paper, a simple and specific graphene quantum dots (GQDs)-based fluorescent biosensor adopted for the determination of glucose based on the combination of the enzyme-coupled method and fluorescence quenching mechanism is demonstrated. Glucose was oxidized by the enzyme glucose oxidase (GOx), forming hydrogen peroxide (H 2 O 2 ) via the catalysis by horseradish peroxidase (HRP). H 2 O 2 was then employed to oxidize phenol to quinone, which led to effective quenching effect in the GQDs⁻GOx⁻HRP⁻phenol system. By optimizing the reaction conditions of the GQDs-enzyme system, a linear relationship between the concentration of glucose and the fluorescence intensity over a range of 0.2⁻10 μ mol/L was obtained. The limit of detection for glucose is 0.08 μ mol/L. The present biosensor for the determination of glucose showed satisfactory reproducibility and accuracy in human serum samples. Since the enzymes have high specificity and unique affinity to the certain substance, the enzyme-coupled system promises a sensitive way for further detection of those chemicals which could be oxidized by enzymes and generated H 2 O 2 or glucose. GQDs and other fluorescent materials coupled with several enzymes can be applied to extensive sensing field.
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Affiliation(s)
- Bingdi Wang
- College of Food Science and Engineering, Jilin University, Changchun, Jilin 130062, China.
- Key Laboratory of Bionic Engineering (Ministry of Education), College of Biological and Agricultural Engineering, Jilin University, Changchun, Jilin 130022, China.
| | - Jing Shen
- College of Food Science and Engineering, Jilin University, Changchun, Jilin 130062, China.
| | - Yanjun Huang
- College of Food Science and Engineering, Jilin University, Changchun, Jilin 130062, China.
| | - Zhenning Liu
- Key Laboratory of Bionic Engineering (Ministry of Education), College of Biological and Agricultural Engineering, Jilin University, Changchun, Jilin 130022, China.
| | - Hong Zhuang
- College of Food Science and Engineering, Jilin University, Changchun, Jilin 130062, China.
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17
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Farzin L, Sadjadi S, Shamsipur M, Chabok A, Sheibani S. A sandwich-type electrochemical aptasensor for determination of MUC 1 tumor marker based on PSMA-capped PFBT dots platform and high conductive rGO-N′,N′ -dihydroxymalonimidamide/thionine nanocomposite as a signal tag. J Electroanal Chem (Lausanne) 2017. [DOI: 10.1016/j.jelechem.2017.11.011] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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18
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Possibilities and Challenges for Quantitative Optical Sensing of Hydrogen Peroxide. CHEMOSENSORS 2017. [DOI: 10.3390/chemosensors5040028] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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19
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Yoon J, Shin JW, Lim J, Mohammadniaei M, Bharate Bapurao G, Lee T, Choi JW. Electrochemical nitric oxide biosensor based on amine-modified MoS 2/graphene oxide/myoglobin hybrid. Colloids Surf B Biointerfaces 2017; 159:729-736. [PMID: 28886511 DOI: 10.1016/j.colsurfb.2017.08.033] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2017] [Revised: 07/28/2017] [Accepted: 08/17/2017] [Indexed: 12/13/2022]
Abstract
Nitric oxide (NO) is one of the most important molecules in living things due to its role as a signaling molecule in influencing pathological and physiological mechanisms including neurotransmission. In this study, the electrochemical biosensor based on the amine-modified molybdenum disulfide nanoparticles (MoS2), graphene oxide (GO) and myoglobin (Mb) hybrid material (amine-modified MoS2/GO/Mb hybrid) is developed to achieve the accurate detection of NO with electrochemical signal improvement. For the first time, the synthesis of MoS2 accompanying the amine-modification of the surface of MoS2 is done to hybridize with GO efficiently through the short linkage. After the amine-modification of MoS2, it is enclosed with GO directly (amine-modified MoS2/GO). Then, Mb which can induce the reduction of NO is immobilized on the amine-modified MoS2/GO to fabricate the amine-modified MoS2/GO/Mb hybrid for NO detection. The prepared hybrid shows the signal improved redox properties relative to the result of the electrode prepared without hybrid. Furthermore, upon addition of NO, the electrode prepared with hybrid shows the improved amperometric response compared with that of the electrode without hybrid. This amine-modified MoS2/GO/Mb hybrid can be used in the development of the biosensor platform accompanying the electrochemical signal improvement and accurate detection of target materials.
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Affiliation(s)
- Jinho Yoon
- Department of Chemical & Biomolecular Engineering, Sogang University, 35 Baekbeom-Ro, Mapo-Gu, Seoul 04107, Republic of Korea
| | - Jae-Wook Shin
- Department of Chemical & Biomolecular Engineering, Sogang University, 35 Baekbeom-Ro, Mapo-Gu, Seoul 04107, Republic of Korea
| | - Joungpyo Lim
- Department of Chemical & Biomolecular Engineering, Sogang University, 35 Baekbeom-Ro, Mapo-Gu, Seoul 04107, Republic of Korea
| | - Mohsen Mohammadniaei
- Department of Chemical & Biomolecular Engineering, Sogang University, 35 Baekbeom-Ro, Mapo-Gu, Seoul 04107, Republic of Korea
| | - G Bharate Bapurao
- Department of Chemical & Biomolecular Engineering, Sogang University, 35 Baekbeom-Ro, Mapo-Gu, Seoul 04107, Republic of Korea
| | - Taek Lee
- Department of Chemical Engineering, Kwangwoon University, Wolgye-dong, Nowon-gu, Seoul 01899, Republic of Korea.
| | - Jeong-Woo Choi
- Department of Chemical & Biomolecular Engineering, Sogang University, 35 Baekbeom-Ro, Mapo-Gu, Seoul 04107, Republic of Korea.
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20
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Shamsipur M, Karimi Z, Amouzadeh Tabrizi M, Rostamnia S. Highly sensitive non-enzymatic electrochemical glucose sensor by Nafion/SBA-15-Cu (II) modified glassy carbon electrode. J Electroanal Chem (Lausanne) 2017. [DOI: 10.1016/j.jelechem.2017.06.029] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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21
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Gong T, Liu J, Wu Y, Xiao Y, Wang X, Yuan S. Fluorescence enhancement of CdTe quantum dots by HBcAb-HRP for sensitive detection of H 2 O 2 in human serum. Biosens Bioelectron 2017; 92:16-20. [DOI: 10.1016/j.bios.2017.01.048] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2016] [Revised: 01/21/2017] [Accepted: 01/23/2017] [Indexed: 12/25/2022]
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22
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Sheng Y, Yang H, Wang Y, Han L, Zhao Y, Fan A. Silver nanoclusters-catalyzed luminol chemiluminescence for hydrogen peroxide and uric acid detection. Talanta 2017; 166:268-274. [DOI: 10.1016/j.talanta.2017.01.066] [Citation(s) in RCA: 62] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2016] [Revised: 01/18/2017] [Accepted: 01/24/2017] [Indexed: 12/31/2022]
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23
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Zong C, Wang M, Li B, Liu X, Zhao W, Zhang Q, Liang A, Yu Y. Sensing of hydrogen peroxide and glucose in human serum via quenching fluorescence of biomolecule-stabilized Au nanoclusters assisted by the Fenton reaction. RSC Adv 2017. [DOI: 10.1039/c7ra01498h] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Sensitive detection of H2O2 and glucose were realized by Fenton reaction assistant oxidation of Au NCs.
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Affiliation(s)
- Chenghua Zong
- Jiangsu Key Laboratory of Green Synthesis for Functional Materials
- School of Chemistry and Material Science
- Jiangsu Normal University
- Xuzhou
- China
| | - Min Wang
- Jiangsu Key Laboratory of Green Synthesis for Functional Materials
- School of Chemistry and Material Science
- Jiangsu Normal University
- Xuzhou
- China
| | - Bo Li
- Jiangsu Key Laboratory of Green Synthesis for Functional Materials
- School of Chemistry and Material Science
- Jiangsu Normal University
- Xuzhou
- China
| | - Xiaojun Liu
- Jiangsu Key Laboratory of Green Synthesis for Functional Materials
- School of Chemistry and Material Science
- Jiangsu Normal University
- Xuzhou
- China
| | - Wenfeng Zhao
- Jiangsu Key Laboratory of Green Synthesis for Functional Materials
- School of Chemistry and Material Science
- Jiangsu Normal University
- Xuzhou
- China
| | - Qingquan Zhang
- Jiangsu Key Laboratory of Green Synthesis for Functional Materials
- School of Chemistry and Material Science
- Jiangsu Normal University
- Xuzhou
- China
| | - Aiye Liang
- Department of Physical Sciences
- Charleston Southern University
- Charleston
- USA
| | - Yang Yu
- Jiangsu Key Laboratory of Green Synthesis for Functional Materials
- School of Chemistry and Material Science
- Jiangsu Normal University
- Xuzhou
- China
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24
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Zheng W, Hu L, Lee LYS, Wong KY. Copper nanoparticles/polyaniline/graphene composite as a highly sensitive electrochemical glucose sensor. J Electroanal Chem (Lausanne) 2016. [DOI: 10.1016/j.jelechem.2016.08.004] [Citation(s) in RCA: 71] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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25
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Hu Q, Yu C, Xia X, Zeng F, Wu S. A fluorescent probe for simultaneous discrimination of GSH and Cys/Hcy in human serum samples via distinctly-separated emissions with independent excitations. Biosens Bioelectron 2016; 81:341-348. [DOI: 10.1016/j.bios.2016.03.011] [Citation(s) in RCA: 113] [Impact Index Per Article: 14.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2016] [Revised: 02/28/2016] [Accepted: 03/07/2016] [Indexed: 01/05/2023]
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26
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Shamsipur M, Molaabasi F, Hosseinkhani S, Rahmati F. Detection of Early Stage Apoptotic Cells Based on Label-Free Cytochrome c Assay Using Bioconjugated Metal Nanoclusters as Fluorescent Probes. Anal Chem 2016; 88:2188-97. [DOI: 10.1021/acs.analchem.5b03824] [Citation(s) in RCA: 78] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Mojtaba Shamsipur
- Department of Chemistry, Razi University, 67149-67346, Kermanshah, Iran
| | - Fatemeh Molaabasi
- Department of Chemistry, Tarbiat Modares University, 14115-111, Tehran, Iran
| | - Saman Hosseinkhani
- Department of Biology, Tarbiat Modares University, 14115-111, Tehran, Iran
| | - Fereshteh Rahmati
- Department of Biology, Tarbiat Modares University, 14115-111, Tehran, Iran
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27
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Li D, Chen Z, Yang T, Wang H, Lu N, Mei X. Green synthesis of highly fluorescent AuNCs with red emission and their special sensing behavior for Al3+. RSC Adv 2016. [DOI: 10.1039/c6ra00912c] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Abstract
Facile methods were fabricated for preparation of highly fluorescent AuNCs with red emission using l-cysteine.
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Affiliation(s)
- Dan Li
- Liaoning Medical University
- Jinzhou
- People's Republic of China
| | - Zhenhua Chen
- Liaoning Medical University
- Jinzhou
- People's Republic of China
| | - Tiezhu Yang
- Liaoning Medical University
- Jinzhou
- People's Republic of China
| | - Hao Wang
- Liaoning Medical University
- Jinzhou
- People's Republic of China
| | - Nan Lu
- Liaoning Medical University
- Jinzhou
- People's Republic of China
| | - Xifan Mei
- Liaoning Medical University
- Jinzhou
- People's Republic of China
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28
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Senthamizhan A, Balusamy B, Aytac Z, Uyar T. Ultrasensitive electrospun fluorescent nanofibrous membrane for rapid visual colorimetric detection of H2O2. Anal Bioanal Chem 2015; 408:1347-55. [PMID: 26637215 DOI: 10.1007/s00216-015-9149-5] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2015] [Revised: 09/30/2015] [Accepted: 10/23/2015] [Indexed: 12/15/2022]
Abstract
We report herein a flexible fluorescent nanofibrous membrane (FNFM) prepared by decorating the gold nanocluster (AuNC) on electrospun polysulfone nanofibrous membrane for rapid visual colorimetric detection of H2O2. The provision of AuNC coupled to NFM has proven to be advantageous for facile and quick visualization of the obtained results, permitting instant, selective, and on-site detection. We strongly suggest that the fast response time is ascribed to the enhanced probabilities of interaction with AuNC located at the surface of NF. It has been observed that the color change from red to blue is dependent on the concentration, which is exclusively selective for hydrogen peroxide. The detection limit has been found to be 500 nM using confocal laser scanning microscope (CLSM), visually recognizable with good accuracy and stability. A systematic comparison was performed between the sensing performance of FNFM and AuNC solution. The underlying sensing mechanism is demonstrated using UV spectra, transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS). The corresponding disappearance of the characteristic emissions of gold nanoclusters and the emergence of a localized surface plasmon resonance (LSPR) band, stressing this unique characteristic of gold nanoparticles. Hence, it is evident that the conversion of nanoparticles from nanoclusters has taken place in the presence of H2O2. Our work here has paved a new path for the detection of bioanalytes, highlighting the merits of rapid readout, sensitivity, and user-friendliness.
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Affiliation(s)
- Anitha Senthamizhan
- UNAM-National Nanotechnology Research Center, Bilkent University, 06800, Ankara, Turkey.
| | - Brabu Balusamy
- UNAM-National Nanotechnology Research Center, Bilkent University, 06800, Ankara, Turkey
| | - Zeynep Aytac
- UNAM-National Nanotechnology Research Center, Bilkent University, 06800, Ankara, Turkey.,Institute of Materials Science and Nanotechnology, Bilkent University, 06800, Ankara, Turkey
| | - Tamer Uyar
- UNAM-National Nanotechnology Research Center, Bilkent University, 06800, Ankara, Turkey. .,Institute of Materials Science and Nanotechnology, Bilkent University, 06800, Ankara, Turkey.
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29
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Aboudzadeh MR, Moassesi ME, Amiri M, Shams H, Alirezapour B, Sadeghi M, Sari MF, Keyvani M. Preparation and characterization of chitosan-capped radioactive gold nanoparticles: neutron irradiation impact on structural properties. JOURNAL OF THE IRANIAN CHEMICAL SOCIETY 2015. [DOI: 10.1007/s13738-015-0742-5] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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30
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Shamsipur M, Farzin L, Amouzadeh Tabrizi M, Molaabasi F. Highly sensitive label free electrochemical detection of VGEF165 tumor marker based on "signal off" and "signal on" strategies using an anti-VEGF165 aptamer immobilized BSA-gold nanoclusters/ionic liquid/glassy carbon electrode. Biosens Bioelectron 2015; 74:369-75. [PMID: 26162327 DOI: 10.1016/j.bios.2015.06.079] [Citation(s) in RCA: 80] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2015] [Revised: 06/12/2015] [Accepted: 06/28/2015] [Indexed: 11/17/2022]
Abstract
In this work, a label free electrochemical aptasensor for the detection of ultra-traces of vascular endothelial growth factor (VEGF165) based on "signal off" and "signal on" mechanisms of response was developed. The BSA-gold nanoclusters/ionic liquid (BSA-AuNCs/IL) was used as a suitable nanocomposite platform for immobilization of the aptamer on a glassy carbon electrode. In "signal off" mechanism, the interaction of VEGF165 with its anti-VEGF165 aptamers, resulted in desorption of methylene blue (MB) probe from aptamer and its release into solution. Consequently, the decrease in current intensity of the differential pulse voltammogram of adsorbed MB was monitored and found to be linearly proportional with increasing concentration of VEGF165 in sample solution in the range of 1-120 pM with a limit of detection of 0.32p M. While, in "signal on" mechanism, the interaction of immobilized anti-VEGF165 aptamers on the electrode surface with VEGF165, led to more mass-transfer limiting of the [Fe(CN)6](3-/4-) probe to the electrode surface. Therefore, the charge transfer resistance (Rct) of the probe was increased linearly with increasing concentration of VEGF165 in the range of 2.5-250 pM with a limit of detection of 0.48 pM. The experimental results demonstrated that both of these mechanisms are suitable for determination of low levels of the VEGF165 tumor marker in serum samples.
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Affiliation(s)
| | - Leila Farzin
- Department of Analytical Chemistry, School of Chemistry, College of Science, University of Tehran, Tehran, Iran
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31
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Shamsipur M, Pashabadi A, Molaabasi F. A novel electrochemical hydrogen peroxide biosensor based on hemoglobin capped gold nanoclusters–chitosan composite. RSC Adv 2015. [DOI: 10.1039/c5ra09216g] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
In this work, the first direct electrochemistry of Hb-AuNCs and its electrocatalysis towards H2O2 in a biosensing system has been reported.
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32
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Wang HB, Zhang HD, Chen Y, Li Y, Gan T. H2O2-mediated fluorescence quenching of double-stranded DNA templated copper nanoparticles for label-free and sensitive detection of glucose. RSC Adv 2015. [DOI: 10.1039/c5ra14852a] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A label-free fluorescent sensor has been developed for glucose detection based on H2O2-mediated fluorescence quenching of ds-DNA templated Cu NPs.
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Affiliation(s)
- Hai-Bo Wang
- College of Chemistry and Chemical Engineering
- Xinyang Normal University
- Xinyang 464000
- PR China
| | - Hong-Ding Zhang
- College of Chemistry and Chemical Engineering
- Xinyang Normal University
- Xinyang 464000
- PR China
| | - Ying Chen
- College of Chemistry and Chemical Engineering
- Xinyang Normal University
- Xinyang 464000
- PR China
| | - Yang Li
- College of Chemistry and Chemical Engineering
- Xinyang Normal University
- Xinyang 464000
- PR China
| | - Tian Gan
- College of Chemistry and Chemical Engineering
- Xinyang Normal University
- Xinyang 464000
- PR China
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