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Wu B, Sun X, Shao Z, Liu S, Yang Z, Zhang Q, Wei Y. Gold nanoparticle-enhanced D-shaped optical fiber sensor for mercury ion detection. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2024. [PMID: 39148341 DOI: 10.1039/d4ay00811a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/17/2024]
Abstract
Mercury ions (Hg2+) are highly toxic heavy metal ions that pose serious health risks to humans when present at concentrations above the safety threshold. Therefore, the development of a rapid and effective Hg2+ detection method is of significant importance. In this study, based on surface plasmon resonance (SPR) technology integrated with COMSOL simulation analysis, a highly sensitive and selective Hg2+ sensing system is constructed. Initially, gold nanoparticles and the surface of a fiber-optic gold film are modified by sodium sulfide (Na2S). In the presence of Hg2+, the sulfur ions on the modified gold film and gold nanoparticles specifically bind to Hg2+, forming the composite structure Au/S-Hg2+-S/AuNPS. Due to the strong electromagnetic coupling between the gold nanoparticles and the gold film, a significant SPR wavelength shift occurs. These results show that the Hg2+ sensor has high sensitivity and enhanced selectivity. The detection limit for mercury ions was 8.15 nM, and the recovery rate in real environmental samples was up to 90.1-97.3%. This sensing system provides an alternative method for rapid and accurate determination of mercury content.
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Affiliation(s)
- Bing Wu
- Provincial Engineering Research Center for Biomedical Materials and Advanced Medical Devices, Huaiyin Institute of Technology, Huai'an, Jiangsu, China.
| | - Xiaoyu Sun
- Provincial Engineering Research Center for Biomedical Materials and Advanced Medical Devices, Huaiyin Institute of Technology, Huai'an, Jiangsu, China.
| | - Zeman Shao
- Provincial Engineering Research Center for Biomedical Materials and Advanced Medical Devices, Huaiyin Institute of Technology, Huai'an, Jiangsu, China.
| | - Sen Liu
- Provincial Engineering Research Center for Biomedical Materials and Advanced Medical Devices, Huaiyin Institute of Technology, Huai'an, Jiangsu, China.
| | - Zhongmei Yang
- Provincial Engineering Research Center for Biomedical Materials and Advanced Medical Devices, Huaiyin Institute of Technology, Huai'an, Jiangsu, China.
| | - Qiuyang Zhang
- Provincial Engineering Research Center for Biomedical Materials and Advanced Medical Devices, Huaiyin Institute of Technology, Huai'an, Jiangsu, China.
| | - Yanchun Wei
- Provincial Engineering Research Center for Biomedical Materials and Advanced Medical Devices, Huaiyin Institute of Technology, Huai'an, Jiangsu, China.
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Nikkey, Swami S, Sharma N, Saini A. Captivating nano sensors for mercury detection: a promising approach for monitoring of toxic mercury in environmental samples. RSC Adv 2024; 14:18907-18941. [PMID: 38873550 PMCID: PMC11167620 DOI: 10.1039/d4ra02787f] [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: 04/15/2024] [Accepted: 06/03/2024] [Indexed: 06/15/2024] Open
Abstract
Mercury, a widespread highly toxic environmental pollutant, poses significant risks to both human health and ecosystems. It commonly infiltrates the food chain, particularly through fish, and water resources via multiple pathways, leading to adverse impacts on human health and the environment. To monitor and keep track of mercury ion levels various methods traditionally have been employed. However, conventional detection techniques are often hindered by limitations. In response to challenges, nano-sensors, capitalizing on the distinctive properties of nanomaterials, emerge as a promising solution. This comprehensive review provides insight into the extensive spectrum of nano-sensor development for mercury detection. It encompasses various types of nanomaterials such as silver, gold, silica, magnetic, quantum dot, carbon dot, and electrochemical variants, elucidating their sensing mechanisms and fabrication. The aim of this review is to offer an in-depth exploration to researchers, technologists, and the scientific community, and understanding of the evolving landscape in nano-sensor development for mercury sensing. Ultimately, this review aims to encourage innovation in the pursuit of efficient and reliable solutions for mercury detection, thereby contributing to advancements in environmental protection and public health.
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Affiliation(s)
- Nikkey
- Department of Chemistry, Chandigarh University NH-05, Ludhiana - Chandigarh State Hwy Mohali Punjab 140413 India
| | - Suman Swami
- Department of Chemistry, Chandigarh University NH-05, Ludhiana - Chandigarh State Hwy Mohali Punjab 140413 India
| | - Neelam Sharma
- Department of Chemistry, Manipal University Jaipur Jaipur-Ajmer Express Highway, Dehmi Kalan, Near GVK Toll Plaza Jaipur Rajasthan 303007 India
| | - Ajay Saini
- Central Analytical Facilities, Manipal University Jaipur Jaipur-Ajmer Express Highway, Dehmi Kalan, Near GVK Toll Plaza Jaipur Rajasthan 303007 India
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Nadumane SS, Biswas R, Mazumder N. Integrated microfluidic platforms for heavy metal sensing: a comprehensive review. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2024; 16:2810-2823. [PMID: 38656324 DOI: 10.1039/d4ay00293h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/26/2024]
Abstract
Heavy metals are found naturally; however, anthropogenic activities such as mining, inappropriate disposal of industrial waste, and the use of pesticides and fertilizers containing heavy metals can cause their unwanted release into the environment. Conventionally, detection of heavy metals is performed using atomic absorption spectrometry, electrochemical methods and inductively coupled plasma-mass spectrometry; however, they involve expensive and sophisticated instruments and multistep sample preparation that require expertise for accurate results. In contrast, microfluidic devices involve rapid, cost-efficient, simple, and reliable approaches for in-laboratory and real-time monitoring of heavy metals. The use of inexpensive and environment friendly materials for fabrication of microfluidic devices has increased the manufacturing efficiency of the devices. Different types of techniques used in heavy metal detection include colorimetry, absorbance-based, and electrochemical detection. This review provides insight into the detection of toxic heavy metals such as mercury (Hg), cadmium (Cd), lead (Pb), and arsenic (As). Importance is given to colorimetry, optical, and electrochemical techniques applied for the detection of heavy metals using microfluidics and their modifications to improve the limit of detection (LOD).
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Affiliation(s)
- Sharmila Sajankila Nadumane
- Department of Biophysics, Manipal School of Life Sciences, Manipal Academy of Higher Education, Manipal, Karnataka, India-576104
| | - Rajib Biswas
- Applied Optics and Photonics Laboratory, Department of Physics, Tezpur University, Tezpur, Assam, India -784028
| | - Nirmal Mazumder
- Department of Biophysics, Manipal School of Life Sciences, Manipal Academy of Higher Education, Manipal, Karnataka, India-576104
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Yang AQ, Zheng W, Chen X, Wang J, Zhou S, Gao H. Au nanorod assembly for sensitive SERS detection of airway inflammatory factors in sputum. Front Bioeng Biotechnol 2023; 11:1256340. [PMID: 38149176 PMCID: PMC10750157 DOI: 10.3389/fbioe.2023.1256340] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2023] [Accepted: 11/17/2023] [Indexed: 12/28/2023] Open
Abstract
In this paper, we demonstrate a surface-enhanced Raman spectroscopy (SERS) biosensor based on the self-assembly of gold nanorods (AuNRs) for the specific detection of airway inflammatory factors in diluted sputum. The AuNR surface was modified with an antibody that was able to specifically recognize an airway inflammatory factor, interleukin-5 (IL-5), so that a end-to-end self-assembly system could be obtained, resulting in an order of magnitude amplification of the Raman signal and greatly improved sensitivity. Meanwhile, the outer layer of the biosensor was coated with silicon dioxide, which improved the stability of the system and facilitated its future applications. When the detected concentration was in the range of 0.1-50 pg/mL, the SERS signal generated by the sensor showed a good linear relationship with the IL-5 concentration. Moreover, it had satisfactory performance in diluted sputum and clinical subjects with asthma, which could achieve sensitive detection of the airway inflammatory factor IL-5. Overall, the developed biosensor based on the SERS effect exhibited the advantages of rapid and sensitive detecting performance, which is suitable for monitoring airway inflammatory factors in sputum.
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Affiliation(s)
- An-qi Yang
- Department of Basic Medicine, Quanzhou Medical College, Quanzhou, China
- Central Laboratory, Second Affiliated Hospital of Fujian Medical University, Quanzhou, China
| | | | - Xiaoyang Chen
- Department of Pulmonary and Critical Intensive Medicine, Second Affiliated Hospital of Fujian Medical University, Quanzhou, China
| | - Jiayin Wang
- Department of Neurosurgery, Second Affiliated Hospital of Fujian Medical University, Quanzhou, China
| | - Shuang Zhou
- Central Laboratory, Second Affiliated Hospital of Fujian Medical University, Quanzhou, China
| | - Hongzhi Gao
- Central Laboratory, Second Affiliated Hospital of Fujian Medical University, Quanzhou, China
- Department of Neurosurgery, Second Affiliated Hospital of Fujian Medical University, Quanzhou, China
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Saputri FA, Zubaidah EU, Kenanga AWP, Jatmika C, Pratiwi R, Dhumale VA. Development of a Colorimetric Paper Sensor for Hg 2+ Detection in Water Using Cyanuric Acid-Conjugated Gold Nanoparticles. Molecules 2023; 28:6527. [PMID: 37764303 PMCID: PMC10535871 DOI: 10.3390/molecules28186527] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2023] [Revised: 09/01/2023] [Accepted: 09/06/2023] [Indexed: 09/29/2023] Open
Abstract
Hg2+ is one of the most dangerous pollutants that can cause damage to organs and the immune system. The common detection methods of Hg2+ require sophisticated instrumentation and a long time for analysis. The purpose of this study was to develop a sensor for the detection of Hg2+ using filter paper immobilized by gold nanoparticles (AuNPs) conjugated with cyanuric acid (CA). The clear color change from pink to bluish purple is the response of the CA-AuNPs filter paper sensor to exposure to Hg2+. Detection can be observed visually with the naked eye and/or with imageJ software; the detection limit is 0.05 µM. The colorimetric response of the sensor was also selective towards Hg2+ after testing with different metal ions. In addition, the response from the sensor was also consistent for lake water samples spiked with Hg2+. The results of this research provide a promising basic technology for the development of sensors that are affordable, fast, portable, and easy to use for the detection and monitoring of Hg2+ levels in water.
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Affiliation(s)
- Febrina Amelia Saputri
- Faculty of Pharmacy, Universitas Indonesia, Depok 16424, Indonesia; (E.U.Z.); (A.W.P.K.); (C.J.)
| | - Eka Ulya Zubaidah
- Faculty of Pharmacy, Universitas Indonesia, Depok 16424, Indonesia; (E.U.Z.); (A.W.P.K.); (C.J.)
| | | | - Catur Jatmika
- Faculty of Pharmacy, Universitas Indonesia, Depok 16424, Indonesia; (E.U.Z.); (A.W.P.K.); (C.J.)
| | - Rimadani Pratiwi
- Department of Pharmaceutical Analysis and Medicinal Chemistry, Faculty of Pharmacy, Universitas Padjadjaran, Jatinangor 45363, Indonesia;
| | - Vinayak A. Dhumale
- Department of Applied Science and Humanities, School of Engineering and Sciences, MIT Art, Design and Technology University, Pune 412201, India;
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Manjubaashini N, Daniel Thangadurai T. Unaided-eye detection of diverse Metal ions by AuNPs-based Nanocomposites: A Review. Microchem J 2023. [DOI: 10.1016/j.microc.2023.108628] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/17/2023]
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7
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Zhang L, Yang W, Zhang C, Pan R, Chen Q, Zhang L. Cu 2+-imprinted optical fiber SPR sensor for intelligent recognition. OPTICS EXPRESS 2022; 30:45525-45537. [PMID: 36522957 DOI: 10.1364/oe.476698] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/27/2022] [Accepted: 11/03/2022] [Indexed: 06/17/2023]
Abstract
An optical fiber surface plasma resonance (SPR) sensor with MMF-TCF-MMF structure was designed to realize intelligent recognition of copper ions (Cu2+), and the selective adsorption sensitization was achieved by plating a layer of Cu2+-imprinted film on the surface of gold film excitation layer. Combining the principle of optical fiber interference and SPR, the proposed sensor realized the detection of the copper ions concentration through measuring the refractive index changes caused by ions adsorption on imprinted film. The Cu2+-imprinted optical fiber SPR sensor can realize the intelligent recognition and detection of copper ions in the complex environment and exhibits a detection sensitivity of -10.05 pm/ppm. The proposed sensor has tremendous development potential in practical application, and provides new ideas for the field of metal ions detection.
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Escandar GM, Olivieri AC. A Critical Review on the Development of Optical Sensors for the Determination of Heavy Metals in Water Samples. The Case of Mercury(II) Ion. ACS OMEGA 2022; 7:39574-39585. [PMID: 36385878 PMCID: PMC9648124 DOI: 10.1021/acsomega.2c05215] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/14/2022] [Accepted: 10/14/2022] [Indexed: 06/16/2023]
Abstract
Recent publications are reviewed concerning the development of sensors for the determination of mercury in drinking water, based on spectroscopic methodologies. A critical analysis is made of the specific details and figures of merit of the developed protocols. Special emphasis is directed to the validation and applicability to real samples in the usual concentration range of mercury, considering the maximum allowed limits in drinking water established by international regulations. It was found that while most publications describe in detail the synthesis, structure, and physicochemical properties of the sensing phases, they do not follow the state of the art in the analytical developments. Recommendations are provided regarding the proper method development and validation, including the setting of the calibration concentration range, the correct estimation of the limits of detection and quantitation, the concentration levels to be set for producing spiked water samples, the number of real samples for adequate validation, the comparison of the developed method with a reference technique, and other analytical features which should be followed.
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Chakraborty P, Krishnani KK. Emerging bioanalytical sensors for rapid and close-to-real-time detection of priority abiotic and biotic stressors in aquaculture and culture-based fisheries. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 838:156128. [PMID: 35605873 DOI: 10.1016/j.scitotenv.2022.156128] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/17/2022] [Revised: 05/12/2022] [Accepted: 05/17/2022] [Indexed: 06/15/2023]
Abstract
Abiotic stresses of various chemical contamination of physical, inorganic, organic and biotoxin origin and biotic stresses of bacterial, viral, parasitic and fungal origins are the significant constraints in achieving higher aquaculture production. Testing and rapid detection of these chemical and microbial contaminants are crucial in identifying and mitigating abiotic and biotic stresses, which has become one of the most challenging aspects in aquaculture and culture-based fisheries. The classical analytical techniques, including titrimetric methods, spectrophotometric, mass spectrometric, spectroscopic, and chromatographic techniques, are tedious and sometimes inaccessible when required. The development of novel and improved bioanalytical methods for rapid, selective and sensitive detection is a wide and dynamic field of research. Biosensors offer precise detection of biotic and abiotic stressors in aquaculture and culture-based fisheries within no time. This review article allows filling the knowledge gap for detection and monitoring of chemical and microbial contaminants of abiotic and biotic origin in aquaculture and culture-based fisheries using nano(bio-) analytical technologies, including nano(bio-)molecular and nano(bio-)sensing techniques.
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Affiliation(s)
- Puja Chakraborty
- ICAR-Central Institute of Fisheries Education, Panch Marg, Off Yari Road, Versova, Andheri (W), Mumbai 400061, India
| | - K K Krishnani
- ICAR-Central Institute of Fisheries Education, Panch Marg, Off Yari Road, Versova, Andheri (W), Mumbai 400061, India.
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Li L, Zhang YN, Zheng W, Li X, Zhao Y. Optical fiber SPR biosensor based on gold nanoparticle amplification for DNA hybridization detection. Talanta 2022; 247:123599. [DOI: 10.1016/j.talanta.2022.123599] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2021] [Revised: 03/28/2022] [Accepted: 05/25/2022] [Indexed: 01/08/2023]
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11
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Kim HK, Nguyen PT, Kim MI, Chan Kim B. Aptamer-functionalized and silver-coated polydopamine-copper hybrid nanoflower adsorbent embedded with magnetic nanoparticles for efficient mercury removal. CHEMOSPHERE 2022; 288:132584. [PMID: 34656629 DOI: 10.1016/j.chemosphere.2021.132584] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/15/2021] [Revised: 10/12/2021] [Accepted: 10/14/2021] [Indexed: 06/13/2023]
Abstract
Mercury (Hg) emissions are increasing annually owing to rapid global industrialization. Hg poisoning can severely affect the human body owing to its persistence and bioaccumulation. In this study, hybrid nanoflowers (NFs) were synthesized by promoting the formation of primary copper-phosphate crystals coordinated with polydopamine (PDA) and Fe3O4 magnetic nanoparticles (MNPs), followed by coating with silver nanoparticles on the surface of the NFs (Ag-MNP-PDA-Cu NFs). The results suggest that the hierarchical structure of the NFs enabled a large surface area with nanosized pores, which were exploited for Hg adsorption. The adsorbed Hg ions could be further eliminated from the solution based on the magnetic characteristics of the NFs. Additionally, hybrid NFs functionalized with Hg2+-binding aptamers (Apt-Ag-MNP-PDA-Cu NFs) were prepared based on the silver-sulfur interactions between the Ag-MNP-PDA-Cu NFs and thiol-modified aptamers. The performance of both adsorbents demonstrated that the immobilization of Hg2+-binding aptamers significantly improved the elimination of Hg from solution. The Hg2+ adsorption isotherm of the Apt-Ag-MNP-PDA-Cu NFs followed the Dubinin-Radushkevich model, with a maximum adsorption capacity of 1073.19 mg/g. The Apt-Ag-MNP-PDA-Cu NFs adsorbed greater amounts of Hg2+ than the non-functionalized NFs at the same concentrations, which confirmed that the functionalization of Hg2+-binding aptamers on the NFs improved the Hg2+ removal performance. The results suggest that Apt-Ag-MNP-PDA-Cu NFs could serve as an efficient Hg-removing adsorbent, possibly by providing binding sites for the formation of T-Hg2+-T complexes.
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Affiliation(s)
- Ho Kyeong Kim
- Center for Environment, Health and Welfare Research, Korea Institute of Science and Technology (KIST), Hwarangno 14-gil 5, Seongbuk-gu, Seoul, 02792, Republic of Korea; Department of Chemical and Biological Engineering, Korea University, Seoul, 02841, Republic of Korea
| | - Phuong Thy Nguyen
- Department of BioNano Technology, Gachon University, Seongnam, Gyeonggi, 13120, Republic of Korea
| | - Moon Il Kim
- Department of BioNano Technology, Gachon University, Seongnam, Gyeonggi, 13120, Republic of Korea.
| | - Byoung Chan Kim
- Center for Environment, Health and Welfare Research, Korea Institute of Science and Technology (KIST), Hwarangno 14-gil 5, Seongbuk-gu, Seoul, 02792, Republic of Korea; Division of Energy and Environment Technology, KIST School, University of Science and Technology (UST), Hwarangno 14-gil 5, Seongbuk-gu, Seoul, 02792, Republic of Korea.
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Harroun SG, Zhang Y, Lin YS, Chang HT. Surface-enhanced Raman spectroscopy and density functional theory study of thymine-1-acetic acid interaction with silver nanoparticles. CAN J CHEM 2022. [DOI: 10.1139/cjc-2021-0085] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Thymine-1-acetic acid (TAA) is a modified nucleobase often used to add thymine functionality to materials. This study reports the Raman band assignments for TAA by comparing its experimental and density functional theory (DFT) simulated Raman spectra. Further comparison of experimental surface-enhanced Raman spectroscopy (SERS) of TAA on silver nanoparticles (Ag NPs) with simulated spectra of various complexes of xAg+ (x = 1, 2, or 3) and TAA reveals its likely adsorption orientation on the Ag NPs. This is one of the few studies that has achieved reasonably accurate simulation of SERS by employing multiple unconnected Ag+ ions, which could represent a compromise between a single atom or ion on one hand and a computationally expensive cluster on the other.
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Affiliation(s)
- Scott G. Harroun
- Département de chimie, Université de Montréal, Montreal, QC H3C 3J7, Canada
| | - Yaoting Zhang
- Department of Chemistry, Queen’s University, Kingston, ON K7L 3N6, Canada
| | - Yu-Syuan Lin
- Department of Chemistry, National Taiwan University, Taipei 10617, Taiwan
| | - Huan-Tsung Chang
- Department of Chemistry, National Taiwan University, Taipei 10617, Taiwan
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Mishra E, Majumder S, Varma S, Dowben PA. X-ray photoemission studies of the interaction of metals and metal ions with DNA. Z PHYS CHEM 2021. [DOI: 10.1515/zpch-2021-3037] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Abstract
X-ray Photoelectron Spectroscopy (XPS) has been used to study the interactions of heavy metal ions with DNA with some success. Surface sensitivity and selectivity of XPS are advantageous for identifying and characterizing the chemical and elemental structure of the DNA to metal interaction. This review summarizes the status of what amounts to a large part of the photoemission investigations of biomolecule interactions with metals and offers insight into the mechanism for heavy metal-bio interface interactions. Specifically, it is seen that metal interaction with DNA results in conformational changes in the DNA structure.
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Affiliation(s)
- Esha Mishra
- Department of Physics and Astronomy , University of Nebraska–Lincoln , Jorgenson Hall, 855 North 16th Street , Lincoln , NE 68588-0299 , USA
| | - Subrata Majumder
- Department of Physics , National Institute of Technology , Patna , Bihar 800005 , India
| | - Shikha Varma
- Institute of Physics , Sachivalaya Marg , Bhubaneswar 751005 , India
- Homi Bhabha National Institute , Training School Complex, Anushakti Nagar , Mumbai 400085 , India
| | - Peter A. Dowben
- Department of Physics and Astronomy , University of Nebraska–Lincoln , Jorgenson Hall, 855 North 16th Street , Lincoln , NE 68588-0299 , USA
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Lan G, Zhu R, Jin W, Luo P, Chen R, Yi J, Wei W. Highly sensitive detection of Hg 2+ employing SPR sensor modified with chitosan/poly (vinyl alcohol)/SnO 2 film. Anal Bioanal Chem 2021; 413:5703-5714. [PMID: 34337685 DOI: 10.1007/s00216-021-03542-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2021] [Revised: 07/06/2021] [Accepted: 07/08/2021] [Indexed: 11/28/2022]
Abstract
Water contamination by mercury ions (Hg2+) causes irreversible and serious effect on the ambient environment, ecological systems, and human health, necessitating further improvement of Hg2+ monitoring at low concentrations. Here, we proposed a novel surface plasmon resonance (SPR) sensor for Hg2+ detection with desirable advantages of high sensitivity, simple operation, label-free, and low cost, in which the chitosan/poly (vinyl alcohol)/SnO2 composite film was modified on sensing surface as the active layer for sensitivity enhancement. Benefiting from the relatively high refractive index of SnO2 nanoparticles, the evanescent field generated at the metal-solution interface can be significantly enhanced, which results in a 5 times improvement of sensitivity. Through appropriate optimization in the aspects of componential constitutions, the sensor exhibits excellent sensitivity of 25.713 nm/μg/L and ultra-low calculated detection limit of 6.61 ng/L(32.95 pM). Such detection limit is strikingly lower than the limitation (10 nM) in drinking water set by the US Environmental Protection Agency. In addition, the as-prepared sensor presents relatively high selectivity for Hg2+, attributing to plenty of binding sites for specific adsorption produced by functionalized chitosan/poly (vinyl alcohol) composites, which have been furtherly verified by characterization of FTIR and XPS spectra. The proposed sensor also exhibits great repeatability and good time stability for 15 days. This work provides a promising strategy for developing high-performance SPR sensor for Hg2+ detection and a prospective application in environmental monitoring.
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Affiliation(s)
- Guilian Lan
- Key Laboratory of Optoelectronic Technology & Systems, Ministry of Education of China, College of Optoelectronic Engineering, Chongqing University, Chongqing, 400044, People's Republic of China
| | - Ruirui Zhu
- Key Laboratory of Optoelectronic Technology & Systems, Ministry of Education of China, College of Optoelectronic Engineering, Chongqing University, Chongqing, 400044, People's Republic of China
| | - Weifeng Jin
- Key Laboratory of Optoelectronic Technology & Systems, Ministry of Education of China, College of Optoelectronic Engineering, Chongqing University, Chongqing, 400044, People's Republic of China.
| | - Peng Luo
- Key Laboratory of Optoelectronic Technology & Systems, Ministry of Education of China, College of Optoelectronic Engineering, Chongqing University, Chongqing, 400044, People's Republic of China
| | - Rong Chen
- Key Laboratory of Optoelectronic Technology & Systems, Ministry of Education of China, College of Optoelectronic Engineering, Chongqing University, Chongqing, 400044, People's Republic of China
| | - Juemin Yi
- Institut für Physik, Carl von Ossietzky Universität, 26111, Oldenburg, Germany
| | - Wei Wei
- Key Laboratory of Optoelectronic Technology & Systems, Ministry of Education of China, College of Optoelectronic Engineering, Chongqing University, Chongqing, 400044, People's Republic of China.
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