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As'ari AH, Aflaha R, Katriani L, Kusumaatmaja A, Santoso I, Yudianti R, Triyana K. An ultra-sensitive ammonia sensor based on a quartz crystal microbalance using nanofibers overlaid with carboxylic group-functionalized MWCNTs. Analyst 2024. [PMID: 39258485 DOI: 10.1039/d4an01061b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/12/2024]
Abstract
Detecting ammonia at low concentrations is crucial in various fields, including environmental monitoring, industrial processes, and healthcare. This study explores the development and performance of an ultra-sensitive ammonia sensor using carboxylic group-functionalized multi-walled carbon nanotubes (f-MWCNTs) overlaid on polyvinyl acetate nanofibers coated on a quartz crystal microbalance (QCM). The sensor demonstrates high responsiveness, with a frequency shift response of over 120 Hz when exposed to 1.5 ppm ammonia, a sensitivity of 23.3 Hz ppm-1 over a concentration range of 1.5-7.5 ppm, and a detection limit of 50 ppb. Additionally, the sensor exhibits a rapid response time of only 14 s, excellent selectivity against other gases, such as acetic acid, formaldehyde, methanol, ethanol, propanol, benzene, toluene, and xylene, and good stability in daily use. These characteristics make the sensor a promising tool for real-time ammonia detection in diverse applications.
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Affiliation(s)
- Ahmad Hasan As'ari
- Department of Physics, Faculty of Mathematics and Natural Sciences, Universitas Gadjah Mada, Sekip Utara, BLS 21, Yogyakarta 55281, Indonesia.
- Research Center for Nanotechnology Systems, National Research and Innovation Agency, Building 440-442, KST B.J. Habibie, Tangerang Selatan 15314, Indonesia.
| | - Rizky Aflaha
- Department of Physics, Faculty of Mathematics and Natural Sciences, Universitas Gadjah Mada, Sekip Utara, BLS 21, Yogyakarta 55281, Indonesia.
| | - Laila Katriani
- Department of Physics, Faculty of Mathematics and Natural Sciences, Universitas Gadjah Mada, Sekip Utara, BLS 21, Yogyakarta 55281, Indonesia.
- Department of Physics Education, Faculty of Mathematics and Natural Sciences, Universitas Negeri Yogyakarta, Karangmalang, Yogyakarta 55281, Indonesia
| | - Ahmad Kusumaatmaja
- Department of Physics, Faculty of Mathematics and Natural Sciences, Universitas Gadjah Mada, Sekip Utara, BLS 21, Yogyakarta 55281, Indonesia.
| | - Iman Santoso
- Department of Physics, Faculty of Mathematics and Natural Sciences, Universitas Gadjah Mada, Sekip Utara, BLS 21, Yogyakarta 55281, Indonesia.
| | - Rike Yudianti
- Research Center for Nanotechnology Systems, National Research and Innovation Agency, Building 440-442, KST B.J. Habibie, Tangerang Selatan 15314, Indonesia.
| | - Kuwat Triyana
- Department of Physics, Faculty of Mathematics and Natural Sciences, Universitas Gadjah Mada, Sekip Utara, BLS 21, Yogyakarta 55281, Indonesia.
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Soudi M, Cencillo-Abad P, Patel J, Ghimire S, Dillon J, Biswas A, Mukhopadhyay K, Chanda D. Self-Assembled Plasmonic Structural Color Colorimetric Sensor for Smartphone-Based Point-Of-Care Ammonia Detection in Water. ACS APPLIED MATERIALS & INTERFACES 2024; 16:45632-45639. [PMID: 39146238 DOI: 10.1021/acsami.4c06615] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/17/2024]
Abstract
Monitoring chemical levels is crucial for safeguarding both the environment and public health. Elevated levels of ammonia, for instance, can harm both humans and aquatic ecosystems, often indicating contamination from agriculture, industry, or sewage. Developing portable, high-resolution, and affordable methods for in situ monitoring of ammonia is thus imperative. Plasmonic sensors offer a promising solution, detecting ammonia by correlating changes in their optical response to the target analyte's concentration. While they are highly sensitive and can be fabricated in a variety of portable and user-friendly formats, some still require reagents or expensive optical equipment, which hinder their widespread adoption. Here, we present a self-assembled nanoplasmonic colorimetric sensor capable of directly detecting ammonia concentrations in aqueous matrices. The proposed sensor exploits the plasmonic resonance of the nanostructures to transduce changes in the chemical environment into alterations in color, offering a label-free method for real-time analysis. The sensor is fabricated using a self-assembling technique compatible with low-cost mass production based on aluminum and aluminum oxide, ensuring affordability and avoiding the use of other toxic chemicals. We developed a model to predict ammonia concentrations based on visible color change of the sensor, achieving a detection limit of 8.5 ppm. Furthermore, to address the need for on-site detection, we integrated smartphone technology for real-time color change analysis, eliminating the need for expensive, bulky optical instruments. Indeed, our approach offers a cost-effective, portable, and user-friendly solution for ammonia detection in water without the need for chemical reagents or spectrometers, making it ideal for field applications. Interestingly, this platform extends its applicability beyond ammonia detection, enabling the monitoring of various chemicals using a smartphone, without the need for any additional costly equipment.
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Affiliation(s)
- Mahdi Soudi
- Department of Physics, University of Central Florida, Orlando, Florida 32816, United States
- CREOL, The College of Optics and Photonics, University of Central Florida, Orlando, Florida 32816, United States
- NanoScience Technology Center, University of Central Florida, Orlando, Florida 32826, United States
| | - Pablo Cencillo-Abad
- NanoScience Technology Center, University of Central Florida, Orlando, Florida 32826, United States
| | - Jay Patel
- NanoScience Technology Center, University of Central Florida, Orlando, Florida 32826, United States
| | - Suvash Ghimire
- Department of Materials Science and Engineering, University of Central Florida, Orlando, Florida 32816, United States
| | - Joseph Dillon
- NanoScience Technology Center, University of Central Florida, Orlando, Florida 32826, United States
| | - Aritra Biswas
- CREOL, The College of Optics and Photonics, University of Central Florida, Orlando, Florida 32816, United States
- NanoScience Technology Center, University of Central Florida, Orlando, Florida 32826, United States
| | - Kausik Mukhopadhyay
- Department of Materials Science and Engineering, University of Central Florida, Orlando, Florida 32816, United States
- Advanced Materials Processing and Analysis Centre, University of Central Florida, Orlando, Florida 32816, United States
| | - Debashis Chanda
- Department of Physics, University of Central Florida, Orlando, Florida 32816, United States
- CREOL, The College of Optics and Photonics, University of Central Florida, Orlando, Florida 32816, United States
- NanoScience Technology Center, University of Central Florida, Orlando, Florida 32826, United States
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Upadhyay S, Kumar A, Srivastava M, Srivastava A, Dwivedi A, Singh RK, Srivastava SK. Recent advancements of smartphone-based sensing technology for diagnosis, food safety analysis, and environmental monitoring. Talanta 2024; 275:126080. [PMID: 38615454 DOI: 10.1016/j.talanta.2024.126080] [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: 01/29/2024] [Revised: 04/04/2024] [Accepted: 04/07/2024] [Indexed: 04/16/2024]
Abstract
The emergence of computationally powerful smartphones, relatively affordable high-resolution camera, drones, and robotic sensors have ushered in a new age of advanced sensible monitoring tools. The present review article investigates the burgeoning smartphone-based sensing paradigms, including surface plasmon resonance (SPR) biosensors, electrochemical biosensors, colorimetric biosensors, and other innovations for modern healthcare. Despite the significant advancements, there are still scarcity of commercially available smart biosensors and hence need to accelerate the rates of technology transfer, application, and user acceptability. The application/necessity of smartphone-based biosensors for Point of Care (POC) testing, such as prognosis, self-diagnosis, monitoring, and treatment selection, have brought remarkable innovations which eventually eliminate sample transportation, sample processing time, and result in rapid findings. Additionally, it articulates recent advances in various smartphone-based multiplexed bio sensors as affordable and portable sensing platforms for point-of-care devices, together with statistics for point-of-care health monitoring and their prospective commercial viability.
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Affiliation(s)
- Satyam Upadhyay
- Department of Physics, Institute of Science, Banaras Hindu University, Varanasi, 221005, India
| | - Anil Kumar
- Department of Physics, Institute of Science, Banaras Hindu University, Varanasi, 221005, India
| | - Monika Srivastava
- School of Materials Science and Technology, Indian Institute of Technology (Banaras Hindu University), Varanasi, India
| | - Amit Srivastava
- Department of Physics TDPG College, VBS Purvanchal University, Jaunpur, 222001, India
| | - Arpita Dwivedi
- Department of Physics, Institute of Science, Banaras Hindu University, Varanasi, 221005, India
| | - Rajesh Kumar Singh
- School of Physical and Material Sciences, Central University of Himachal Pradesh, Dharamshala, Kangra, 176215, India
| | - S K Srivastava
- Department of Physics, Institute of Science, Banaras Hindu University, Varanasi, 221005, India.
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Ghorbanian E, Ghasemi F, Tavabe KR, Alizadeh Sabet HR. Formation of plasmonic core/shell nanorods through ammonia-mediated dissolution of silver(i)oxide for ammonia monitoring. NANOSCALE ADVANCES 2024; 6:3229-3238. [PMID: 38868819 PMCID: PMC11166121 DOI: 10.1039/d4na00216d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/15/2024] [Accepted: 05/07/2024] [Indexed: 06/14/2024]
Abstract
Due to the expansion of the aquaculture industry in the world and the importance of controlling ammonia in fish breeding water, high levels of which impose significant damage to fish farming, it is crucial to develop affordable, rapid, and on-site methods for timely and accurate detection of ammonia. In this study, a colorimetric sensor based on the formation of gold/silver core/shell nanorods (NRs) was developed for the rapid detection of ammonia. The sensor functioned by the specific dissolution of silver(i) oxide by ammonia, which triggered the activation of silver ions and the subsequent formation of gold/silver core/shell NRs in the presence of a reducing agent (i.e., ascorbic acid (AA)). This led to changes in the surface composition, size, and aspect ratio of the NRs, which was accompanied by a vivid color change from green to red/orange in less than a minute. The colorimetric sensor was optimized by adjusting the effective parameters, including ascorbic acid, silver ion, and sodium hydroxide concentration as well as pH and reaction time. After the optimization process, the sensor was found to have a linear range from 50 to 800 μmol L-1 (0.85-13.6 ppm). In addition, the application of the sensor was validated by measuring the ammonia content in water samples from rearing ponds for rainbow trout, sturgeon, and tilapia before and after feeding. The sensor's label-free, rapid, user-friendly, naked-eye, and cost-effective operation makes it an attractive option for on-site environmental monitoring of ammonia.
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Affiliation(s)
- Elahe Ghorbanian
- Department of Fisheries, Faculty of Natural Resources, University of Tehran Karaj Iran
| | - Forough Ghasemi
- Department of Nanotechnology, Agricultural Biotechnology Research Institute of Iran (ABRII), Agricultural Research, Education, and Extension Organization (AREEO) Karaj Iran
| | - Kamran Rezaei Tavabe
- Department of Fisheries, Faculty of Natural Resources, University of Tehran Karaj Iran
| | - Hamid Reza Alizadeh Sabet
- International Sturgeon Research Institute, Iranian Fisheries Science Research Institute, Agricultural Research, Education, and Extension Organization (AREEO) Rasht Iran
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Adampourezare M, Nikzad B, Sajedi-Amin S, Rahimpour E. Colorimetric sensor array for versatile detection and discrimination of model analytes with environmental relevance. BMC Chem 2024; 18:80. [PMID: 38649980 PMCID: PMC11034120 DOI: 10.1186/s13065-024-01181-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2023] [Accepted: 04/04/2024] [Indexed: 04/25/2024] Open
Abstract
In the current work, a rapid, simple, low-cost, and sensitive smartphone-based colorimetric sensor array coupled with pattern-recognition methods was proposed for the determination and differentiation of some organic and inorganic bases (i.e., OH-, CO32-, PO43-, NH3, ClO-, diethanolamine, triethanolamine) as model compounds. The sensing system has been designed based on color-sensitive dyes (Fuchsine, Giemsa, Thionine, and CoCl2) which were used as sensor elements. The color changes of a sensor array were observed by the naked eye. The color patterns were recorded using digital imaging in a three-dimensional (red, green, and blue) space and quantitatively analyzed with color calibration techniques. Distinctive colorimetric patterns for target bases via linear discriminant analysis (LDA) and hierarchical clustering analysis (HCA) were observed. The results indicated that the analytes related to each class (at the different concentration levels in the range of 0.001-1.0 mol L-1) were clustered together in the canonical discriminant plot and HCA dendrogram with high sensitivity and an overall precision of 85%. Furthermore, the first function factor of LDA correlated with the concentration of each target analyte in a correlation coefficient (R2) range of 0.864-0.996. These described procedures based on the colorimetric sensor array technique could be a promising candidate for practical applications in package technology and facile detection of pollutants.
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Affiliation(s)
- Mina Adampourezare
- Research Center of Bioscience and Biotechnology, University of Tabriz, Tabriz, Iran
- Pharmaceutical Analysis Research Center and Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Behzad Nikzad
- Research Center of Bioscience and Biotechnology, University of Tabriz, Tabriz, Iran
| | - Sanaz Sajedi-Amin
- Pharmaceutical Analysis Research Center and Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran.
| | - Elaheh Rahimpour
- Pharmaceutical Analysis Research Center and Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran.
- Infectious and Tropical Diseases Research Center, Tabriz University of Medical Sciences, Tabriz, Iran.
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Ye ZT, Tseng SF, Tsou SX, Tsai CW. High-sensitivity flip chip blue Mini-LEDs miniaturized optical instrument for non-invasive glucose detection. DISCOVER NANO 2024; 19:6. [PMID: 38175421 PMCID: PMC10766880 DOI: 10.1186/s11671-023-03948-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/08/2023] [Accepted: 12/21/2023] [Indexed: 01/05/2024]
Abstract
The colorimetric detection of glucose typically involves a peroxidase reaction producing a color, which is then recorded and analyzed. However, enzyme detection has difficulties with purification and storage. In addition, replacing enzyme detection with chemical methods involves time-consuming steps such as centrifugation and purification and the optical instruments used for colorimetric detection are often bulky and not portable. In this study, ammonium metavanadate and sulfuric acid were used to prepare the detection solution instead of peroxidase to produce color. We also analyzed the effect of different concentrations of detection solution on absorbance sensitivity. Finally, a flip chip blue Mini-LEDs miniaturized optical instrument (FC blue Mini-LEDs MOI) was designed for glucose detection using optics fiber, collimating lenses, a miniaturized spectrometer, and an FC Blue Mini-LEDs with a center wavelength of 459 nm. While detecting glucose solutions in the concentration range of 0.1-10 mM by the developed MOI, the regression equation of y = 0.0941x + 0.1341, R2 of 0.9744, the limit of detection was 2.15 mM, and the limit of quantification was 7.163 mM. Furthermore, the preparation of the detection solution only takes 10 min, and the absorbance sensitivity of the optimized detection solution could be increased by 2.3 times. The detection solution remained stable with only a 0.6% decrease in absorbance compared to the original after storing it in a refrigerated environment at 3 °C for 14 days. The method proposed in this study for detecting glucose using FC blue light Mini-LEDs MOI reduces the use of peroxidase. In addition, it has a wide detection range that includes blood as well as non-invasive saliva and tear fluids, providing patients with a miniaturized, highly sensitive, and quantifiable glucose detection system.
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Affiliation(s)
- Zhi Ting Ye
- Department of Mechanical Engineering, Advanced Institute of Manufacturing with High-Tech Innovations, National Chung Cheng University, 168, University Rd., Min-Hsiung, Chia-Yi, 62102, Taiwan, ROC.
| | - Shen Fu Tseng
- Department of Mechanical Engineering, Advanced Institute of Manufacturing with High-Tech Innovations, National Chung Cheng University, 168, University Rd., Min-Hsiung, Chia-Yi, 62102, Taiwan, ROC
| | - Shang Xuan Tsou
- Department of Mechanical Engineering, Advanced Institute of Manufacturing with High-Tech Innovations, National Chung Cheng University, 168, University Rd., Min-Hsiung, Chia-Yi, 62102, Taiwan, ROC
| | - Chun Wei Tsai
- Graduate Institute of Photonics and Optoelectronics, National Taiwan University, No. 1, Sec. 4, Roosevelt Rd., Taipei, 106319, Taiwan, ROC.
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Pacheco PGF, Ferreira DL, Pereira RS, Vivas MG. Physicochemical properties of ultrasmall colloidal silver nanoparticles: an experimental and computational approach. Analyst 2023; 148:5262-5269. [PMID: 37740327 DOI: 10.1039/d3an01319g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/24/2023]
Abstract
Silver nanoparticles (AgNPs) exhibit very interesting properties that have been employed in several kinds of applications spanning from antibacterial activity to plasmon-polaritons generation. Nanoparticle size strongly influences these applications. However, the characterization of ultrasmall AgNPs (particle diameter < 10 nm) encompassing different aspects such as average size, polydispersion, shape (anisotropy), concentration, and density remains a challenging task. To address these challenges, we combined TEM measurements with a computational framework based on Mie-Gans theory. This allowed us to describe the aforementioned AgNP features accurately. The synthesis of AgNPs in an aqueous medium involved the use of silver nitrate as a chemical precursor and sodium borohydride as a reducing agent, with polyvinylpyrrolidone acting as a stabilizing agent. Our outcomes showed that increasing the concentration of the precursor and reducing agent with a fixed 1 : 2 molar ratio tends to yield ultrasmall AgNPs with low to moderate polydispersion, a nearly spherical shape (low anisotropy), concentration in the nanomolar range and density close to silver bulk. Also, we established an analytical expression that correlates the extinction molar absorptivity to AgNP size considering the nanoparticle shape. Notably, the computational framework proved to be highly effective in extracting crucial information about the AgNPs from UV-vis spectroscopy data. In conclusion, our study sheds light on the unique properties of ultrasmall AgNPs and presents a comprehensive approach for properly characterizing these nanoparticles, paving the way for further advancements in their applications.
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Affiliation(s)
| | - Diego Lourençoni Ferreira
- Laboratório de Espectroscopia Óptica e Fotônica, Universidade Federal de Alfenas, Poços de Caldas, MG, Brazil.
| | - Richard Silveira Pereira
- Laboratório de Espectroscopia Óptica e Fotônica, Universidade Federal de Alfenas, Poços de Caldas, MG, Brazil.
| | - Marcelo Gonçalves Vivas
- Laboratório de Espectroscopia Óptica e Fotônica, Universidade Federal de Alfenas, Poços de Caldas, MG, Brazil.
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Ben Jaballah M, Karrat A, Amine A, Dridi C. Immobilization of diphenylcarbazide on paper-based analytical devices for the pre-concentration and detection of chromium VI in water samples. Talanta 2023; 265:124889. [PMID: 37399649 DOI: 10.1016/j.talanta.2023.124889] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2023] [Revised: 06/20/2023] [Accepted: 06/27/2023] [Indexed: 07/05/2023]
Abstract
A novel approach using a smartphone for the detection of Cr (VI) has been developed. In this context, two different platforms were designed for the detection of Cr (VI). The first one was synthesized via a crosslinking reaction of chitosan with 1,5-Diphenylcarbazide (DPC-CS). The obtained material was integrated into a paper to develop a new paper-based analytical device (DPC-CS-PAD). The DPC-CS-PAD exhibited high specificity toward Cr (VI). The second platform (DPC-Nylon PAD) was prepared by covalent immobilization of DPC onto a Nylon paper and then its analytical performances regarding Cr (VI) extraction and detection were evaluated. DPC-CS-PAD presented a linear range of 0.1-5 ppm with detection and quantification limits of about 0.04 and 0.12 ppm, respectively. The DPC-Nylon-PAD exhibited a linear response of 0.1-2.5 ppm with detection and quantification limits of 0.06 and 0.2 ppm, respectively. Furthermore, the developed platforms were effectively applied for testing the effect of the loading solution volume for trace Cr (IV) detection. For the DPC-CS material, a volume of 20 mL allowed the detection of 4 ppb of Cr (VI). In the case of DPC-Nylon-PAD, the loading volume of 1 mL permitted the detection of the critical concentration of Cr (VI) in water.
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Affiliation(s)
- Menyar Ben Jaballah
- NANOMISENE Laboratory, Centre for Research on Microelectronics and Nanotechnology CRMN of Sousse Technopole, B.P. 334, LR16CRMN01, Sahloul, Sousse, 4054, Tunisia
| | - Abdelhafid Karrat
- Laboratory of Process Engineering and Environment, Faculty of Sciences and Techniques, Hassan II University of Casablanca, P.A. 146., Mohammedia, Morocco
| | - Aziz Amine
- Laboratory of Process Engineering and Environment, Faculty of Sciences and Techniques, Hassan II University of Casablanca, P.A. 146., Mohammedia, Morocco.
| | - Chérif Dridi
- NANOMISENE Laboratory, Centre for Research on Microelectronics and Nanotechnology CRMN of Sousse Technopole, B.P. 334, LR16CRMN01, Sahloul, Sousse, 4054, Tunisia.
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Brinza M, Schröder S, Ababii N, Gronenberg M, Strunskus T, Pauporte T, Adelung R, Faupel F, Lupan O. Two-in-One Sensor Based on PV4D4-Coated TiO 2 Films for Food Spoilage Detection and as a Breath Marker for Several Diseases. BIOSENSORS 2023; 13:bios13050538. [PMID: 37232899 DOI: 10.3390/bios13050538] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2023] [Revised: 05/03/2023] [Accepted: 05/08/2023] [Indexed: 05/27/2023]
Abstract
Certain molecules act as biomarkers in exhaled breath or outgassing vapors of biological systems. Specifically, ammonia (NH3) can serve as a tracer for food spoilage as well as a breath marker for several diseases. H2 gas in the exhaled breath can be associated with gastric disorders. This initiates an increasing demand for small and reliable devices with high sensitivity capable of detecting such molecules. Metal-oxide gas sensors present an excellent tradeoff, e.g., compared to expensive and large gas chromatographs for this purpose. However, selective identification of NH3 at the parts-per-million (ppm) level as well as detection of multiple gases in gas mixtures with one sensor remain a challenge. In this work, a new two-in-one sensor for NH3 and H2 detection is presented, which provides stable, precise, and very selective properties for the tracking of these vapors at low concentrations. The fabricated 15 nm TiO2 gas sensors, which were annealed at 610 °C, formed two crystal phases, namely anatase and rutile, and afterwards were covered with a thin 25 nm PV4D4 polymer nanolayer via initiated chemical vapor deposition (iCVD) and showed precise NH3 response at room temperature and exclusive H2 detection at elevated operating temperatures. This enables new possibilities in application fields such as biomedical diagnosis, biosensors, and the development of non-invasive technology.
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Affiliation(s)
- Mihai Brinza
- Center for Nanotechnology and Nanosensors, Department of Microelectronics and Biomedical Engineering, Technical University of Moldova, 168 Stefan cel Mare Av., MD-2004 Chisinau, Moldova
| | - Stefan Schröder
- Department of Materials Science, Chair for Multicomponent Materials, Faculty of Engineering, Kiel University, Kaiserstraße 2, D-24143 Kiel, Germany
| | - Nicolai Ababii
- Center for Nanotechnology and Nanosensors, Department of Microelectronics and Biomedical Engineering, Technical University of Moldova, 168 Stefan cel Mare Av., MD-2004 Chisinau, Moldova
| | - Monja Gronenberg
- Department of Materials Science, Chair for Functional Nanomaterials, Faculty of Engineering, Kiel University, Kaiserstraße 2, D-24143 Kiel, Germany
| | - Thomas Strunskus
- Department of Materials Science, Chair for Multicomponent Materials, Faculty of Engineering, Kiel University, Kaiserstraße 2, D-24143 Kiel, Germany
| | - Thierry Pauporte
- Institut de Recherche de Chimie Paris-IRCP, Chimie ParisTech, PSL Université, 11 rue Pierre et Marie Curie, 75231 Paris, Cedex 05, France
| | - Rainer Adelung
- Department of Materials Science, Chair for Functional Nanomaterials, Faculty of Engineering, Kiel University, Kaiserstraße 2, D-24143 Kiel, Germany
| | - Franz Faupel
- Department of Materials Science, Chair for Multicomponent Materials, Faculty of Engineering, Kiel University, Kaiserstraße 2, D-24143 Kiel, Germany
| | - Oleg Lupan
- Center for Nanotechnology and Nanosensors, Department of Microelectronics and Biomedical Engineering, Technical University of Moldova, 168 Stefan cel Mare Av., MD-2004 Chisinau, Moldova
- Department of Materials Science, Chair for Multicomponent Materials, Faculty of Engineering, Kiel University, Kaiserstraße 2, D-24143 Kiel, Germany
- Department of Materials Science, Chair for Functional Nanomaterials, Faculty of Engineering, Kiel University, Kaiserstraße 2, D-24143 Kiel, Germany
- Institut de Recherche de Chimie Paris-IRCP, Chimie ParisTech, PSL Université, 11 rue Pierre et Marie Curie, 75231 Paris, Cedex 05, France
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Olier BS, De Sousa OM, Sanches EG. Can canthaxanthin intensify the colour of the blood swordtail Xiphophorus helleri? JOURNAL OF FISH BIOLOGY 2023. [PMID: 37060354 DOI: 10.1111/jfb.15407] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/10/2023] [Accepted: 04/13/2023] [Indexed: 05/03/2023]
Abstract
Colouring has a great influence on the commercialization of ornamental fish. The aim of this study was to evaluate different concentrations of canthaxanthin in the diet of the blood swordtail Xiphophorus helleri in an effort to obtain a more intense red colour. Six concentrations of canthaxanthin (0, 50, 100, 250, 400 and 600 mg kg-1 diet) were used. The experiment lasted 60 days. Fish were evaluated for increased red pigmentation through the use of photographs (performed by smartphone) and imaging applications considering the Hunter method and the CMYK and productive performance. No significant differences were observed for productive performance. The use of photographs by means of a smartphone and the use of imaging applications proved to be adequate to assess differences in colour in the species. Swordtail red pigmentation did not show significant increase regardless of canthaxanthin dosages. Varieties of ornamental fish bred for red coloration may have limits for increased colour due to the storage capacity of carotenoids by chromatophores.
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Affiliation(s)
- Bruno Silva Olier
- Postgraduate Program in Aquaculture and Fisheries, Fisheries Institute, Secretariat of Agriculture and Supply, State of São Paulo, São Paulo, Brazil
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Sanyal G, Kaur SP, Rout CS, Chakraborty B. Defect-Engineering of 2D Dichalcogenide VSe 2 to Enhance Ammonia Sensing: Acumens from DFT Calculations. BIOSENSORS 2023; 13:257. [PMID: 36832023 PMCID: PMC9954586 DOI: 10.3390/bios13020257] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/04/2022] [Revised: 02/07/2023] [Accepted: 02/10/2023] [Indexed: 06/18/2023]
Abstract
Opportune sensing of ammonia (NH3) gas is industrially important for avoiding hazards. With the advent of nanostructured 2D materials, it is felt vital to miniaturize the detector architecture so as to attain more and more efficacy with simultaneous cost reduction. Adaptation of layered transition metal dichalcogenide as the host may be a potential answer to such challenges. The current study presents a theoretical in-depth analysis regarding improvement in efficient detection of NH3 using layered vanadium di-selenide (VSe2) with the introduction of point defects. The poor affinity between VSe2 and NH3 forbids the use of the former in the nano-sensing device's fabrications. The adsorption and electronic properties of VSe2 nanomaterials can be tuned with defect induction, which would modulate the sensing properties. The introduction of Se vacancy to pristine VSe2 was found to cause about an eight-fold increase (from -012 eV to -0.97 eV) in adsorption energy. A charge transfer from the N 2p orbital of NH3 to the V 3d orbital of VSe2 has been observed to cause appreciable NH3 detection by VSe2. In addition to that, the stability of the best-defected system has been confirmed through molecular dynamics simulation, and the possibility of repeated usability has been analyzed for calculating recovery time. Our theoretical results clearly indicate that Se-vacant layered VSe2 can be an efficient NH3 sensor if practically produced in the future. The presented results will thus potentially be useful for experimentalists in designing and developing VSe2-based NH3 sensors.
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Affiliation(s)
- Gopal Sanyal
- Mechanical Metallurgy Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400085, India
| | - Surinder Pal Kaur
- Department of Chemistry, Indian Institute of Technology Ropar, Rupnagar 140001, India
| | - Chandra Sekhar Rout
- Centre for Nano and Material Sciences, Jain Global Campus, Jakkasandra, Ramanagaram, Bangalore 562112, India
| | - Brahmananda Chakraborty
- High Pressure and Synchroton Radiation Physics Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400085, India
- Homi Bhabha National Institute, Mumbai 400094, India
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12
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Ahmed M, Zhao R, Xing T, Du J. Constructing Netlike Nanosheets of ZnO/BiOCl with Heterojunction as Robust Material for Electrochemical Amine Detection. Chemistry 2023; 29:e202202658. [PMID: 36210474 DOI: 10.1002/chem.202202658] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2022] [Indexed: 11/16/2022]
Abstract
The electrochemical sensing is a potential method for detection of trace toxic substance. Herein, the heterojunction of netlike ZnO/BiOCl nanosheets was constructed for the enhanced electrochemical detection of ammonia. Cyclic voltammetry and linear sweep voltammetry were used to investigate the electrochemical performance. The results show that the ZnO/BiOCl-modified electrode exhibits higher sensitivity towards ammonia compared with the ZnO and BiOCl-based electrodes, which is ascribed to band structure and fast electron transfer. The high response of 11.8 μA mM-1 and a low detection limit (LOD) of 0.25 μM are achieved. In addition, the ZnO/BiOCl material exhibits high selectivity, repeatability and stability. The better linear relationship between concentration and current (R2 =0.99) is significant for quantitative detection of ammonia, implying that netlike ZnO/BiOCl nanosheets can serve as electrochemical sensing platform for detecting toxic substance. This research provides a strategy for fabricating two-dimensional netlike materials and regulating heterojunctions used for electrochemical application.
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Affiliation(s)
- Maruf Ahmed
- College of Chemical Engineering and Technology, College of Chemistry, Taiyuan University of Technology, 030024, Taiyuan, Shanxi, P. R. China
| | - Ruihua Zhao
- College of Chemical Engineering and Technology, College of Chemistry, Taiyuan University of Technology, 030024, Taiyuan, Shanxi, P. R. China.,Shanxi Kunming Tobacco Co. Ltd., 21 Dachang South Road, 030032, Taiyuan, Shanxi, P. R. China
| | - Tian Xing
- College of Chemical Engineering and Technology, College of Chemistry, Taiyuan University of Technology, 030024, Taiyuan, Shanxi, P. R. China
| | - Jianping Du
- College of Chemical Engineering and Technology, College of Chemistry, Taiyuan University of Technology, 030024, Taiyuan, Shanxi, P. R. China.,Shanxi Key Laboratory of Gas Energy Efficient and Clean Utilization, 030024, Taiyuan, Shanxi, P. R. China
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13
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Silva GME, Garcia JA, Garitta JDA, Cunha DGF, Finkler NR, Mendiondo EM, Ghiglieno F. Smartphone-based spectrometry system as a prescreening assessment of copper and iron for real time control of water pollution. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2022; 323:116214. [PMID: 36115238 DOI: 10.1016/j.jenvman.2022.116214] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/21/2022] [Revised: 09/05/2022] [Accepted: 09/05/2022] [Indexed: 06/15/2023]
Abstract
Due to anthropogenic actions, the presence of pollutants in water bodies, such as toxic metals, are increasingly negatively affecting water quality, biodiversity and sustainable goals worldwide. Therefore, decentralization of water pollution monitoring with low-cost devices, such as using smartphones, suggests an innovative green technology for in situ and real-time control. In this study, a Handheld Smartphone Spectrophotometry System (HSSS) was developed to estimate copper and iron concentration water samples. The system mainly comprises a portable commercial spectrometer (GoSpectro) that can measure the spectrum of light in the visible region. The HSSS LOD and LOQ for copper were equal to 0.589 and 1.784 mg/L, respectively, and 0.479 and 1.450 mg/L, respectively for iron. In addition, the results of copper and iron concentrations in samples with unknown concentrations using HSSS were close to the Benchtop Spectrophometer (BS). Finally, HSSS performance showed to be a new green technology for water quality management with potential applications for monitoring water resources and also providing further possibilities to measure other pollutants by the same technique, in addition to metals.
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Affiliation(s)
- Gabriel Marinho E Silva
- Department of Hydraulics Engineering and Sanitation, São Carlos School of Engineering, University of São Paulo, São Carlos, SP, Brazil.
| | | | | | - Davi Gasparini Fernandes Cunha
- Department of Hydraulics Engineering and Sanitation, São Carlos School of Engineering, University of São Paulo, São Carlos, SP, Brazil
| | - Nícolas Reinaldo Finkler
- Department of Hydraulics Engineering and Sanitation, São Carlos School of Engineering, University of São Paulo, São Carlos, SP, Brazil
| | - Eduardo Mario Mendiondo
- Department of Hydraulics Engineering and Sanitation, São Carlos School of Engineering, University of São Paulo, São Carlos, SP, Brazil
| | - Filippo Ghiglieno
- Department of Hydraulics Engineering and Sanitation, São Carlos School of Engineering, University of São Paulo, São Carlos, SP, Brazil; Department of Physics, Federal University of São Carlos, São Carlos, SP, Brazil
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14
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Huang ZH, Layek M, Li CF, Lee KM, Huang YC. Cesium Lead Bromide Nanocrystals: Synthesis, Modification, and Application to O 2 Sensing. SENSORS (BASEL, SWITZERLAND) 2022; 22:8853. [PMID: 36433450 PMCID: PMC9698211 DOI: 10.3390/s22228853] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/20/2022] [Revised: 11/08/2022] [Accepted: 11/14/2022] [Indexed: 06/16/2023]
Abstract
The fluorescence intensity of inorganic CsPbBr3 (CPB) perovskite nanocrystals (NCs) decreases in the presence of O2. In this study, we synthesized CPB NCs with various shapes and sizes for use as optical gas sensing materials. We fabricated O2 gas sensors from the various CPB NCs on several porous and nonporous substrates and examined the effects of the NC shapes and aggregate sizes and the substrate pore size on the device response. Our sensor fabricated from CPB nanocrystals on a porous substrate exhibited the highest response; the porous substrate allowed the rapid diffusion of O2 such that the NC surface was exposed effectively to the gas. Thus, the interfacial interaction between NC surfaces and substrates is a critical factor for consideration when preparing gas sensors with a high response.
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Affiliation(s)
- Zhi-Hao Huang
- Department of Chemical and Materials Engineering, Chang Gung University, Taoyuan City 33302, Taiwan
| | - Madhuja Layek
- Department of Materials Engineering, Ming Chi University of Technology, New Taipei City 24301, Taiwan
- School of Engineering, Brown University, Providence, RI 02912, USA
| | - Chia-Feng Li
- Department of Materials Engineering, Ming Chi University of Technology, New Taipei City 24301, Taiwan
| | - Kun-Mu Lee
- Department of Chemical and Materials Engineering, Chang Gung University, Taoyuan City 33302, Taiwan
- Department of Pediatrics, Division of Neonatology, Chang Gung Memorial Hospital, Taoyuan City 33305, Taiwan
| | - Yu-Ching Huang
- Department of Materials Engineering, Ming Chi University of Technology, New Taipei City 24301, Taiwan
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15
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Potdar RP, Khollam YB, Shaikh SF, More PS, Rana AUHS. Polyvinylpyrrolidone-Capped Silver Nanoparticles for Highly Sensitive and Selective Optical Fiber-Based Ammonium Sensor. NANOMATERIALS (BASEL, SWITZERLAND) 2022; 12:nano12193373. [PMID: 36234507 PMCID: PMC9565296 DOI: 10.3390/nano12193373] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/01/2022] [Revised: 09/20/2022] [Accepted: 09/21/2022] [Indexed: 05/28/2023]
Abstract
Herein, aqueous ammonium sensing characteristics of polyvinylpyrrolidone (PVP) capped silver nanoparticles (Ag-NPs) coated optical fiber-based sensors are presented. The PVP-capped Ag-NPs were prepared using cold and modified polyol synthesis methods. Aqueous ammonium detection was carried out by the surface plasmon resonance (SPR) effect observed in the Ag-NPs coated optical fiber system. The effect of cold and modified polyol synthesis methods on optical sensing performance was studied. The optical fiber cladding was modified with PVP-capped Ag-NPs according to the standard protocol for sensing investigation. The probe sensing response was analyzed for varying concentrations of ammonium ions on red, green, and blue LEDs. The sensor characteristics, viz., sensing response, repeatability, calibration curve, and ambient light effect, were investigated for PVP capped Ag-NPs coated optical fiber-based sensor. The PVP capped Ag-NPs synthesized via the polyol synthesis method showed a detection limit of 48.9 mM, 1.33 mV/M sensitivity, and an excellent linear relationship (R2 = 0.9992) between voltage and ammonium ion concentration in the range of 0.054-13.4 M concentration. On the other hand, PVP capped Ag-NPs synthesized using the cold synthesis method showed a detection limit of 159.4 mM, a sensitivity of 0.06 mV/M, and a poor linear relationship (R2 = 0.4588) between voltage and ammonium ion concentration in the range of 0.054-13.4 M concentration. The results indicate that the PVP-capped Ag-NPs synthesized using the polyol synthesis method exhibit enhanced ammonium ion sensing compared to the cold synthesis method.
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Affiliation(s)
- Revati P. Potdar
- Nanomaterials Application Laboratory, The Institute of Science, Dr. Homi Bhabha State University, Mumbai 400032, India
| | - Yogesh B. Khollam
- Research Centre in Physics, Department of Physics, Baburaoji Gholap College, Sangvi, Pune 411027, India
| | - Shoyebmohamad. F. Shaikh
- Department of Chemistry, College of Science, Bld-5, King Saud University, Riyadh 11451, Saudi Arabia
| | - Pravin S. More
- Nanomaterials Application Laboratory, The Institute of Science, Dr. Homi Bhabha State University, Mumbai 400032, India
| | - Abu ul Hassan S. Rana
- Department of Electrical and Electronic Engineering, The University of Melbourne, Parkville, VIC 3010, Australia
- Department of Obstetrics and Gynecology, The University of Melbourne, Parkville, VIC 3010, Australia
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16
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Simultaneous and individual determination of seven biochemical species using a glassy carbon electrode modified with a nanocomposite of Pt nanoparticle and graphene by a one-step electrochemical process. Talanta 2022; 247:123590. [DOI: 10.1016/j.talanta.2022.123590] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2021] [Revised: 03/16/2022] [Accepted: 05/24/2022] [Indexed: 11/18/2022]
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17
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SPR-based assay kit for rapid determination of Pb2+. Anal Chim Acta 2022; 1220:340030. [DOI: 10.1016/j.aca.2022.340030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2022] [Revised: 06/01/2022] [Accepted: 06/02/2022] [Indexed: 11/17/2022]
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18
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Zhang J, Li Y, Gong X, Wang Y, Fu W. Colorimetric detection of total antioxidants in green tea with oxidase-mimetic CoOOH nanorings. Colloids Surf B Biointerfaces 2022; 218:112711. [PMID: 35907355 DOI: 10.1016/j.colsurfb.2022.112711] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2022] [Revised: 06/15/2022] [Accepted: 07/18/2022] [Indexed: 11/19/2022]
Abstract
Green tea is a popular beverage and is widely consumed due to its taste and antioxidative polyphenols. Herein, a smartphone-based colorimetric reader using cobalt oxyhydroxide (CoOOH) nanorings has been successfully applied to detect antioxidants in green tea with high reliability and robustness. By exploiting the oxidase-mimicking activity, the as-synthesized CoOOH nanorings replaces natural enzymes to directly catalyze oxidate colorless 3,3 ´ ,5,5 ´ -tetramethylbenzidine (TMB), while antioxidants can disintegrate CoOOH, leading to an antioxidant concentration-dependent color change. Benefiting from the CoOOH nanorings-based colorimetric strategy, a smartphone-assistant nanosensor was devised for portable and visual detection of antioxidants in green tea. The proposed method can be extended to visual detection of a diverse range of diseases by responding to their specific antioxidant, and thus provide a pivotal disease toolbox that is compatible for development at the point-of-care.
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Affiliation(s)
- Jiajia Zhang
- Engineering Research Center for Biotechnology of Active Substances (Ministry of Education), Chongqing Key Laboratory of Green Synthesis and Applications, College of Chemistry, Chongqing Normal University, Chongqing 401331, PR China
| | - Yongfei Li
- Engineering Research Center for Biotechnology of Active Substances (Ministry of Education), Chongqing Key Laboratory of Green Synthesis and Applications, College of Chemistry, Chongqing Normal University, Chongqing 401331, PR China
| | - Xue Gong
- Engineering Research Center for Biotechnology of Active Substances (Ministry of Education), Chongqing Key Laboratory of Green Synthesis and Applications, College of Chemistry, Chongqing Normal University, Chongqing 401331, PR China
| | - Yi Wang
- Engineering Research Center for Biotechnology of Active Substances (Ministry of Education), Chongqing Key Laboratory of Green Synthesis and Applications, College of Chemistry, Chongqing Normal University, Chongqing 401331, PR China.
| | - Wensheng Fu
- Engineering Research Center for Biotechnology of Active Substances (Ministry of Education), Chongqing Key Laboratory of Green Synthesis and Applications, College of Chemistry, Chongqing Normal University, Chongqing 401331, PR China.
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19
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Saboorizadeh B, Zare-Dorabei R. Intrinsic Dual-Emitting Carbon Quantum-Dot-Based Selective Ratiometric Fluorescent Mercaptopurine Detection. ACS Biomater Sci Eng 2022; 8:3589-3595. [PMID: 35786836 DOI: 10.1021/acsbiomaterials.2c00423] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Mercaptopurine (6-MP), an immunosuppressive drug, has been widely prescribed for treating leukemia and autoimmune diseases. The level of the 6-MP drug in body fluids is of great interest due to the severe health problems related to its overdose. This study used a facile microwave preparation route to synthesize carbon quantum dots (CQDs) using glutathione and formamide as carbon sources. The obtained monodispersed quantum dots showed dual fluorescence emission with a sensitive affinity toward the 6-MP drug. The sensor's response was optimized by tuning the temperature, pH, and volume ratio of the probe. The prepared ratiometric fluorescence method showed accurate measurements for determining mercaptopurine in aqueous solutions in the concentration range of 1.4-7.6 mg L-1 with the limit of detection of 1.3 mg L-1. The sensor's performance was assessed in complex solutions, human urine, and human plasma sample and recovery values in the range of 88-127% were obtained. The reliable dual fluorometric sensor showed promising results for 6-MP determination and potential application for the determination of other chemical and biochemical species.
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Affiliation(s)
- Bahar Saboorizadeh
- Research Laboratory of Spectrometry & Micro and Nano Extraction, Department of Chemistry, Iran University of Science and Technology, Tehran 1684613114, Iran
| | - Rouholah Zare-Dorabei
- Research Laboratory of Spectrometry & Micro and Nano Extraction, Department of Chemistry, Iran University of Science and Technology, Tehran 1684613114, Iran
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20
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Xu C, Lin M, Wang T, Yao Z, Zhang W, Feng X. Colorimetric aptasensor for on-site detection of acetamiprid with hybridization chain reaction-assisted amplification and smartphone readout strategy. Food Control 2022. [DOI: 10.1016/j.foodcont.2022.108934] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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21
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Singh GP, Sardana N. Smartphone-based Surface Plasmon Resonance Sensors: a Review. PLASMONICS (NORWELL, MASS.) 2022; 17:1869-1888. [PMID: 35702265 PMCID: PMC9184243 DOI: 10.1007/s11468-022-01672-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/02/2021] [Accepted: 05/31/2022] [Indexed: 06/15/2023]
Abstract
The surface plasmon resonance (SPR) is a phenomenon based on the combination of quantum mechanics and electromagnetism, which leads to the creation of charge oscillations on a metal-dielectric interface. The SPR phenomenon creates a signal which measures refractive index change at the metal-dielectric interface. SPR-based sensors are being developed for real-time and label-free detection of water pollutants, toxins, disease biomarkers, etc., which are highly sensitive and selective. Smartphones provide hardware and software capability which can be incorporated into SPR sensors, enabling the possibility of economical and accurate on-site portable sensing. The camera, screen, and LED flashlight of the smartphone can be employed as components of the sensor. The current article explores the recent advances in smartphone-based SPR sensors by studying their principle, components, application, and signal processing. Furthermore, the general theoretical and practical aspects of SPR sensors are discussed.
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Affiliation(s)
- Gaurav Pal Singh
- Department of Metallurgical and Materials Engineering, Indian Institute of Technology Ropar, Rupnagar, 140001 India
| | - Neha Sardana
- Department of Metallurgical and Materials Engineering, Indian Institute of Technology Ropar, Rupnagar, 140001 India
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22
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23
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Novel hydrophobic colorimetric films based on ethylcellulose/castor oil/anthocyanins for pork freshness monitoring. Lebensm Wiss Technol 2022. [DOI: 10.1016/j.lwt.2022.113631] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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24
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Cebrián P, Pérez-Sienes L, Sanz-Vicente I, López-Molinero Á, de Marcos S, Galbán J. Solving Color Reproducibility between Digital Devices: A Robust Approach of Smartphones Color Management for Chemical (Bio)Sensors. BIOSENSORS 2022; 12:341. [PMID: 35624642 PMCID: PMC9139083 DOI: 10.3390/bios12050341] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/25/2022] [Revised: 05/07/2022] [Accepted: 05/09/2022] [Indexed: 12/02/2022]
Abstract
In the past twelve years, digital image colorimetry (DIC) on smartphones has acquired great importance as an alternative to the most common analytical techniques. This analysis method is based on fast, low-cost, and easily-accessible technology, which can provide quantitative information about an analyte through the color changes of a digital image. Despite the fact that DIC is very widespread, it is not exempt from a series of problems that are not fully resolved yet, such as variability of the measurements between smartphones, image format in which color information is stored, power distribution of the illuminant used for the measurements, among others. This article proposes a methodology for the standardization and correction of these problems using self-developed software, together with the use of a 3D printed light box. This methodology is applied to three different colorimetric analyses using different types and brands of smartphones, proving that comparable measurements between devices can be achieved. As color can be related to many target analytes, establishing this measurement methodology can lead to new control analysis applicable to diverse sectors such as alimentary, industrial, agrarian, or sanitary.
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Affiliation(s)
- Pablo Cebrián
- Analytical Biosensors Group (GBA), Analytical Chemistry Department, Faculty of Sciences, INMA, University of Zaragoza, 50009 Zaragoza, Spain; (P.C.); (I.S.-V.); (Á.L.-M.); (S.d.M.)
| | - Leticia Pérez-Sienes
- Complex Systems Group, Polytechnic University of Madrid, ETSI Agronomy, Food and Biosystems, 28040 Madrid, Spain;
| | - Isabel Sanz-Vicente
- Analytical Biosensors Group (GBA), Analytical Chemistry Department, Faculty of Sciences, INMA, University of Zaragoza, 50009 Zaragoza, Spain; (P.C.); (I.S.-V.); (Á.L.-M.); (S.d.M.)
| | - Ángel López-Molinero
- Analytical Biosensors Group (GBA), Analytical Chemistry Department, Faculty of Sciences, INMA, University of Zaragoza, 50009 Zaragoza, Spain; (P.C.); (I.S.-V.); (Á.L.-M.); (S.d.M.)
| | - Susana de Marcos
- Analytical Biosensors Group (GBA), Analytical Chemistry Department, Faculty of Sciences, INMA, University of Zaragoza, 50009 Zaragoza, Spain; (P.C.); (I.S.-V.); (Á.L.-M.); (S.d.M.)
| | - Javier Galbán
- Analytical Biosensors Group (GBA), Analytical Chemistry Department, Faculty of Sciences, INMA, University of Zaragoza, 50009 Zaragoza, Spain; (P.C.); (I.S.-V.); (Á.L.-M.); (S.d.M.)
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25
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Amirjani A, Salehi K, Sadrnezhaad SK. Simple SPR-based colorimetric sensor to differentiate Mg 2+ and Ca 2+ in aqueous solutions. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2022; 268:120692. [PMID: 34894568 DOI: 10.1016/j.saa.2021.120692] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/09/2021] [Revised: 11/25/2021] [Accepted: 11/29/2021] [Indexed: 06/14/2023]
Abstract
L-tryptophan functionalized AgNPs were successfully fabricated using a one-pot synthesis method and assessed as a colorimetric probe for rapid and accurate determination of Mg2+ ions. The developed sensor showed a selective response towards Mg2+ with no interference from Ca2+ in the wide concentration range of 1-200 µM. The sensor's response was optimized in the pH range of 9-10, which can be attributed to the protonation of amine groups and their interaction with Mg2+ ions. The stability and selectivity of the sensor were examined in different salt (NaCl) and other metal ions, respectively. The L-tryptophan-AgNPs sensor detected Mg2+ with the limit of detection of 3 µM, which is way lower than the concentration range of magnesium in human serum (0.75-1.05 mM). The recovery values of the developed sensor were in the range of 96-102% for the determination of Mg2+ in urine samples. The obtained performances proved the potential application of the developed sensor for clinical diagnostic of Mg2+ ions where an accurate and rapid response is needed.
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Affiliation(s)
- Amirmostafa Amirjani
- Department of Materials Science and Engineering, Sharif University of Technology, P.O.Box: 11155-9466, Tehran, Iran.
| | - Kimia Salehi
- Department of Materials Science and Engineering, Sharif University of Technology, P.O.Box: 11155-9466, Tehran, Iran
| | - S K Sadrnezhaad
- Department of Materials Science and Engineering, Sharif University of Technology, P.O.Box: 11155-9466, Tehran, Iran.
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26
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Xu C, Lin M, Song C, Chen D, Bian C. A gold nanoparticle-based visual aptasensor for rapid detection of acetamiprid residues in agricultural products using a smartphone. RSC Adv 2022; 12:5540-5545. [PMID: 35425533 PMCID: PMC8981225 DOI: 10.1039/d2ra00348a] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2022] [Accepted: 02/10/2022] [Indexed: 01/02/2023] Open
Abstract
Based on the colorimetric analysis of gold nanoparticles and a smartphone readable strategy, a stable, sensitive, and visual method was established for rapid detection of acetamiprid residues in agricultural products. By optimizing the key parameters, the detection process only took 40 minutes with good specificity. The acetamiprid aptamer can help AuNPs to resist salt-induced aggregation. Conversely, in the presence of acetamiprid, the anti-protection is weakened and the AuNPs aggregated with the color change of the solution. The photographs of the solution are recorded by the smartphone and analyzed through image processing. In the range from 25 to 300 μM the method can realize a quantitative analysis of acetamiprid, and the detection limit is about 3.81 μM. Excellent recoveries are taken in samples of cucumber, cabbage, and river water, ranging from 96.78% to 129.95%. These results show no significant difference from the results obtained by the microplate reader. What's more, the method employs a smartphone to read without the assistance of professional equipment, which greatly reduces the cost of detection, and shows a promising application prospect for on-site rapid detection of acetamiprid.
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Affiliation(s)
- Chengnan Xu
- Zhejiang Citrus Research Institute Taizhou 318026 China
| | - Mei Lin
- Zhejiang Citrus Research Institute Taizhou 318026 China
| | - Chaonan Song
- School of Life Science, Taizhou University Taizhou 318001 China
| | - Danli Chen
- School of Life Science, Taizhou University Taizhou 318001 China
| | - Caimiao Bian
- School of Life Science, Taizhou University Taizhou 318001 China
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27
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A simple strategy to enhance the luminescence of metal nanoclusters and its application for turn-on detection of 2-thiouracil and hyaluronidase. Talanta 2022; 236:122876. [PMID: 34635256 DOI: 10.1016/j.talanta.2021.122876] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2021] [Revised: 08/25/2021] [Accepted: 09/09/2021] [Indexed: 12/20/2022]
Abstract
Metal nanoclusters (NCs) as promising nanomaterials for sensing applications have attracted significant attention because of their unique photoluminescence properties. However, the quantum yields of metal NCs are still relatively low when compared to conventional quantum dots and organic dyes, posing a major obstacle to their assay application. It is challenging but important to pursue a way to improve the luminescence of metal NCs. In this work, we developed a novel strategy to enhance the luminescence of silver nanoclusters (Ag NCs) based on the binding with 6-aza-2-thiothymine (ATT) via Au3+ bridging. We studied the possible mechanism of this binding-induced luminescence enhancement and attributed it to the ligands rigidifying. Since 2-thiouracil (2-TU), a common anticancer, antithyroid, and antiviral agent, featured a similar molecular structure of ATT, this luminescence enhancement strategy can be designed to sensitive and selective turn-on detect 2-TU. As far as we know, this is the first report for the fluorescent turn-on detect 2-TU. Benefiting from the good performance of this method and the advantages of fluorescence assay, intracellular imaging of 2-TU, which has yet to be achieved based on currently developed analytical methods for 2-TU, was carried out via our approach. Moreover, to further expand the sensing application of the developed luminescence enhancement method, we constructed a universal detection platform. Taking hyaluronidase as a target, the feasibility of the detection platform was confirmed. The discoveries in this study offer a simple route to improve the optical properties of NCs and design their sensing applications.
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28
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Jain S, Paliwal A, Gupta V, Tomar M. Smartphone integrated handheld Long Range Surface Plasmon Resonance based fiber-optic biosensor with tunable SiO 2 sensing matrix. Biosens Bioelectron 2021; 201:113919. [PMID: 35032842 DOI: 10.1016/j.bios.2021.113919] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2021] [Revised: 10/14/2021] [Accepted: 12/22/2021] [Indexed: 11/17/2022]
Abstract
In the present work, a novel smartphone assisted fiber optic (FO)-Long range surface plasmon resonance (LRSPR) based biosensor is proposed. In the developed biosensor, the inbuilt color sensitive property of the digital camera present in the smartphone is used for the monitoring of blue and red color channel intensities. This will replace the most exploited diffraction gratings or narrow band filters used for analyzing the spectral data in reported smartphone based SPR sensors. The proposed technique helps in improving the sensitivity and reduces the chances of wrong detection. For the first time, SiO2 nanostructured film is employed as the dielectric sensing layer to excite the Long range surface plasmons (LRSPs) in the dielectric-metal-dielectric configuration. The proposed FO-LRSPR biosensor possess limit of detection of 0.02 mM and sensitivity of 0.9/mM and, for uric acid detection in the 0.1 mM-1 mM concentration range. The novel fabricated sensor which is found to be stable up to 24 weeks can be effectively utilized in health sector and environment monitoring and it possess the ability of point-of-care detection, even in rural and remote areas.
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Affiliation(s)
- Surbhi Jain
- Department of Physics and Astrophysics, University of Delhi, Delhi, 110007, India
| | - Ayushi Paliwal
- Department of Physics, Deshbandhu College, University of Delhi, Delhi, 110007, India
| | - Vinay Gupta
- Department of Physics and Astrophysics, University of Delhi, Delhi, 110007, India
| | - Monika Tomar
- Department of Physics, Miranda House, University of Delhi, Delhi, 110007, India.
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Qiu Z, Xue Y, Li J, Zhang Y, Liang X, Wen C, Gong H, Zeng J. Highly sensitive colorimetric detection of NH3 based on Au@Ag@AgCl core-shell nanoparticles. CHINESE CHEM LETT 2021. [DOI: 10.1016/j.cclet.2021.02.029] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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30
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Sharma L, Gouraj S, Raut P, Tagad C. Development of a surface-modified paper-based colorimetric sensor using synthesized Ag NPs-alginate composite. ENVIRONMENTAL TECHNOLOGY 2021; 42:3441-3450. [PMID: 32066333 DOI: 10.1080/09593330.2020.1732471] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/28/2019] [Accepted: 02/10/2020] [Indexed: 06/10/2023]
Abstract
There has been an increase in the discovery and usage of sensors for the detection of chemical compounds in the field of analytical chemistry since the last several years. This has led to progressive research in nanotechnology for developing efficient nanomaterials for bio-chemical sensing applications. Thereby, a deft synthesis of silver nanoparticles (Ag NPs) under microwave irradiation was achieved using sodium alginate as a reducing and capping agent in a fast and cost-effective approach. As per the X-ray diffraction analysis, the average particle size of Ag NPs was found to be 10 nm. X-ray photoelectron spectroscpopy analysis showed characteristic peaks at binding energies of 368.10 and 374.11 eV indicating the formation of Ag NPs. The synthesized Ag NPs-alginate composite was further used to develop a paper-based sensor for the detection of H2O2. Detection of H2O2 is based on the discolouration of the Ag NPs-alginate composite modified paper sensor as a function of H2O2 concentration. The analysis of the decoloured paper strips was done by a smartphone camera and an RGB Colour Reader application (app) to measure colour intensity. The sensing characteristics were found in the range of 0.1-10 mM. The colour analysis revealed piecewise linear relationship of intensity of RGB to H2O2 concentration in the range of 0.1-1.5 and 2-10 mM with R2 values of 0.97 and 0.9778, respectively. Owing to the high sensitivity, selectivity, and cost-effectiveness, the developed paper sensor can be a potential tool for real-time analysis of H2O2.
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Affiliation(s)
- Lokesh Sharma
- MIT School of Bioengineering Sciences and Research, MIT ADT University, Pune, India
| | - Shubhankar Gouraj
- MIT School of Bioengineering Sciences and Research, MIT ADT University, Pune, India
| | - Pranit Raut
- MIT School of Bioengineering Sciences and Research, MIT ADT University, Pune, India
| | - Chandrakant Tagad
- MIT School of Bioengineering Sciences and Research, MIT ADT University, Pune, India
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31
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Cai Y, Zhu H, Zhou W, Qiu Z, Chen C, Qileng A, Li K, Liu Y. Capsulation of AuNCs with AIE Effect into Metal–Organic Framework for the Marriage of a Fluorescence and Colorimetric Biosensor to Detect Organophosphorus Pesticides. Anal Chem 2021; 93:7275-7282. [DOI: 10.1021/acs.analchem.1c00616] [Citation(s) in RCA: 65] [Impact Index Per Article: 21.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Yue Cai
- Key Laboratory for Biobased Materials and Energy of Ministry of Education, College of Materials and Energy, South China Agricultural University, Guangzhou 510642, People’s Republic of China
| | - Hongshuai Zhu
- Key Laboratory for Biobased Materials and Energy of Ministry of Education, College of Materials and Energy, South China Agricultural University, Guangzhou 510642, People’s Republic of China
- The Guangdong Provincial Key Laboratory of Food Quality and Safety, College of Food Science, South China Agricultural University, Guangzhou 510642, People’s Republic of China
| | - Weichi Zhou
- College of Mathematics and Informatics, South China Agricultural University, Guangzhou 510642, People’s Republic of China
| | - Ziyin Qiu
- Key Laboratory for Biobased Materials and Energy of Ministry of Education, College of Materials and Energy, South China Agricultural University, Guangzhou 510642, People’s Republic of China
| | - Congcong Chen
- Key Laboratory for Biobased Materials and Energy of Ministry of Education, College of Materials and Energy, South China Agricultural University, Guangzhou 510642, People’s Republic of China
| | - Aori Qileng
- Key Laboratory for Biobased Materials and Energy of Ministry of Education, College of Materials and Energy, South China Agricultural University, Guangzhou 510642, People’s Republic of China
- The Guangdong Provincial Key Laboratory of Food Quality and Safety, College of Food Science, South China Agricultural University, Guangzhou 510642, People’s Republic of China
| | - Kangshun Li
- College of Mathematics and Informatics, South China Agricultural University, Guangzhou 510642, People’s Republic of China
| | - Yingju Liu
- Key Laboratory for Biobased Materials and Energy of Ministry of Education, College of Materials and Energy, South China Agricultural University, Guangzhou 510642, People’s Republic of China
- The Guangdong Provincial Key Laboratory of Food Quality and Safety, College of Food Science, South China Agricultural University, Guangzhou 510642, People’s Republic of China
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A sensitive and quantitative prognosis of C-reactive protein at picogram level using mesoporous silica encapsulated core-shell up-conversion nanoparticle based lateral flow strip assay. Talanta 2021; 230:122335. [PMID: 33934788 DOI: 10.1016/j.talanta.2021.122335] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2021] [Revised: 03/12/2021] [Accepted: 03/18/2021] [Indexed: 12/13/2022]
Abstract
C- reactive protein (CRP) is a sensitive indicator for infectious or inflammatory diseases in human which can reflect the body's inflammation latency and early pathophysiological changes. The most common detection method of serum CRP is ELISA that has been proved to be expensive and time-consuming, restricting its use in point-of-care application. In this paper, we demonstrated a lateral flow system for CRP quantification by using mesoporous silica (mSiO2) coated up-converting nanoparticles (UCNPs) (denoted as UCNPs@mSiO2) as fluorescent labels. The up-converting core can emit strong green fluorescence signals under NIR excitation light (980 nm) with excellent photostability, high signal-to-noise ratio and low background fluorescence. By wrapping ultrathin mSiO2 outside, the core-shell structured UCNPs@mSiO2 exhibits good dispersity and stability meanwhile maintains strong fluorescence emission. Besides, the mSiO2 shell provides further functionalities for antibody linkage. By using a portable fluorescence sensor, we reached a CRP detection limit of 0.05 ng/mL and a linear range from 0.1 ng/mL-50 ng/mL, and the detection time was no more than 8 min. The lateral flow test strips exhibit great stability in CRP quantification (CV%<5) and have a life time of more than 1 week at ambient temperature. Furthermore, the proposed system can work with a cloud-enabled smartphone through Bluetooth for Internet of Medical Things application. This CRP detection method proves to be rapid and easy-operated, which has great potential in early inflammatory disease perception in the point-of-care tests and future's 5G-enabled remote healthcare management.
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Elsharkawy RG, Ghoneim AA. An efficient colorimetric inspection of ammonia using silver nanoparticles synthesized by 3‐(1‐(2‐(2,4‐dinitrophenyl)hydrazono)ethyl)‐1
H
‐indole as chemo‐sensors in water environment. J PHYS ORG CHEM 2021. [DOI: 10.1002/poc.4205] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Rehab G. Elsharkawy
- Chemistry Department, College of Science Jouf University Sakaka Saudia Arabia
- Chemistry Department, Faculty of Science Tanta University Tanta Egypt
| | - Amira A. Ghoneim
- Chemistry Department, College of Science Jouf University Sakaka Saudia Arabia
- Chemistry Department, Faculty of Science Zagazig University Zagazig Egypt
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Nafady A, Al-Enizi AM, Alothman AA, Shaikh SF. Design and fabrication of green and sustainable vapochromic cellulose fibers embedded with natural anthocyanin for detection of toxic ammonia. Talanta 2021; 230:122292. [PMID: 33934764 DOI: 10.1016/j.talanta.2021.122292] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2021] [Revised: 03/03/2021] [Accepted: 03/04/2021] [Indexed: 12/16/2022]
Abstract
Exposure to colorless ammonia gas may lead to damage in human organs or even death. Herein, we describe facile fabrication of an environmentally-friendly, portable, reversible, and sensitive solid-state colorimetric cellulose (Cell)/anthocyanin (Anth) vapochromic sensor that exhibits instant visual color change to both gaseous and aqueous phases of ammonia. The naturally occurring anthocyanin can be easily extracted from the red-cabbage plant and applied as a direct dyestuff onto viscose fibers in the presence of potassium aluminum sulfate as mordant to generate nanoparticles of mordant/anthocyanin coordinated complex. Thus, upon exposure to aqueous ammonia, an instant color change of the smart (Cell-Anth) diagnostic assays, from purple to colorless, was noted and quantitatively probed via both CIE Lab coordinates and UV-Vis spectral measurements. Importantly, the fabricated (Cell-Anth) viscose fabric showed rapid responses, fraction of second, with a good limit of detection (LOD) in the range of 200-1200 mg L-1. This receptor also demonstrated ratiometric changes in the UV-Vis absorbance spectra, giving a hypsochromic shift from 611 to 375 nm upon increasing the total content of ammonia in an aqueous media. The morphologies of Cell-Anth fabrics as well as particle size of the generated mordant/dye complex on the fabric surface have been characterized by transmission electron microscopic (TEM), scan electron microscopy (SEM), energy-dispersive X-ray patterns (EDX) and Fourier-transform infrared spectroscopic (FT-IR). The comfortability of the dyed cellulose fibers was also investigated in terms of their bend length, air-permeability and colorfastness properties. Significantly, the present study offers a promising onsite vapochromic device that enables detection of ammonia in either aqueous or gas phase in various environments and products.
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Affiliation(s)
- Ayman Nafady
- Department of Chemistry, College of Science, King Saud University, Riyadh, 11451, Saudi Arabia.
| | - Abdullah M Al-Enizi
- Department of Chemistry, College of Science, King Saud University, Riyadh, 11451, Saudi Arabia
| | - Asma A Alothman
- Department of Chemistry, College of Science, King Saud University, Riyadh, 11451, Saudi Arabia
| | - Shoyebmohamad F Shaikh
- Department of Chemistry, College of Science, King Saud University, Riyadh, 11451, Saudi Arabia
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Amirjani A, Rahbarimehr E. Recent advances in functionalization of plasmonic nanostructures for optical sensing. Mikrochim Acta 2021; 188:57. [PMID: 33506310 DOI: 10.1007/s00604-021-04714-3] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2020] [Accepted: 01/14/2021] [Indexed: 12/20/2022]
Abstract
This review summarizes the progress that has been made in the use of nanostructured SPR-based chemical sensors and biosensors. Following an introduction into the field, a first large section covers principles of nanomaterial-based SPR sensing, mainly on methods using noble metal nanoparticles (spheres, cubes, triangular plates, etc.). The next section covers methods for functionalization of plasmonic nanostructures, with subsections on functionalization using (a) amino acids and proteins; (b) oligonucleotides, (c) organic polymers, and (d) organic compounds. Several tables are presented that give an overview on the wealth of methods and materials published. A concluding section summarizes the current status, addresses current challenges, and gives an outlook on potential future trends. This review is not intended to be a comprehensive compilation of the literature in the field but rather is a systematic overview of the state of the art in surface chemistry of plasmonic nanostructures. The ability of various ligands and receptors for functionalization of nanoparticles as well as their sensing capability is discussed.
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Affiliation(s)
- Amirmostafa Amirjani
- Materials Science and Engineering Department, Sharif University of Technology, P.O. Box 11155-9466, Azadi Avenue, Tehran, Iran.
| | - Erfan Rahbarimehr
- Department of Chemistry, Université de Sherbrooke, QC, J1K 2R1, Canada
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Chen X, Sun Y, Mo X, Gao Q, Deng Y, Hu M, Zou J, Nie J, Zhang Y. On-site, rapid and visual method for nanomolar Hg 2+ detection based on the thymine–Hg 2+–thymine triggered “double” aggregation of Au nanoparticles enhancing the Tyndall effect. RSC Adv 2021; 11:36859-36865. [PMID: 35494369 PMCID: PMC9043572 DOI: 10.1039/d1ra07211k] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2021] [Accepted: 11/08/2021] [Indexed: 01/07/2023] Open
Abstract
This work describes a new nanosensor for the simple, rapid, portable, colorimetric analysis of mercury(ii) (Hg2+) ions by combining the sensitive Tyndall effect (TE) of colloidal Au nanoparticles (AuNPs) with specific thymine–Hg2+–thymine (T–Hg2+–T) coordination chemistry for the first time. For the TE-inspired assay (TEA), in the presence of Hg2+ in a sample, the analyte can selectively mediate the hybridization of three types of flexible single-stranded DNAs (ssDNAs) to form stable rigid double-stranded DNAs (dsDNAs) via the T–Hg2+–T ligand interaction. Subsequent self-assembly of the dsDNAs with terminal thiol groups on the AuNPs' surfaces led to their “double” aggregation in addition to the lack of sufficient ssDNAs as the stabilizing molecules in a high-salt solution, resulting in a remarkably enhanced TE signal that positively relied on the Hg2+ level. The results demonstrated that such a TEA method enabled rapid naked-eye qualitative analysis of 625 nM Hg2+ within 10 min with an inexpensive laser pointer pen as an inexpensive handheld light source to generate the TE response. Making use of a smartphone for portable TE readout could further quantitatively detect the Hg2+ ions in a linear concentration range from 156 to 2500 nM with a limit of detection as low as 25 nM. Moreover, the developed equipment-free nanosensor was also used to analyze the Hg2+ ions in real samples including tap water, drinking water, and pond water, the obtained recoveries were within the range of 93.68 to 108.71%. To the best of our knowledge, this is the first report of using the AuNPs and functional nucleic acids to design a TE-based biosensor for the analysis of highly toxic heavy metal ions. A new equipment-free colorimetric nanosensor was initially developed for quantitative point-of-need detection of nanomolar Hg2+ ions based on the enhancement in Tyndall effect of Au nanoparticles via their target-triggered “double” aggregation.![]()
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Affiliation(s)
- Xuejiang Chen
- Guangxi Key Laboratory of Electrochemical and Magnetochemical Function Materials, College of Chemistry and Bioengineering, Guilin University of Technology, Guilin 541004, P. R. China
| | - Yao Sun
- Guangxi Key Laboratory of Electrochemical and Magnetochemical Function Materials, College of Chemistry and Bioengineering, Guilin University of Technology, Guilin 541004, P. R. China
| | - Xiaomei Mo
- Guangxi Key Laboratory of Electrochemical and Magnetochemical Function Materials, College of Chemistry and Bioengineering, Guilin University of Technology, Guilin 541004, P. R. China
| | - Qian Gao
- Guangxi Key Laboratory of Electrochemical and Magnetochemical Function Materials, College of Chemistry and Bioengineering, Guilin University of Technology, Guilin 541004, P. R. China
| | - Yanan Deng
- Guangxi Key Laboratory of Electrochemical and Magnetochemical Function Materials, College of Chemistry and Bioengineering, Guilin University of Technology, Guilin 541004, P. R. China
| | - Miao Hu
- Guangxi Key Laboratory of Electrochemical and Magnetochemical Function Materials, College of Chemistry and Bioengineering, Guilin University of Technology, Guilin 541004, P. R. China
| | - Jianmei Zou
- Guangxi Key Laboratory of Electrochemical and Magnetochemical Function Materials, College of Chemistry and Bioengineering, Guilin University of Technology, Guilin 541004, P. R. China
| | - Jinfang Nie
- Guangxi Key Laboratory of Electrochemical and Magnetochemical Function Materials, College of Chemistry and Bioengineering, Guilin University of Technology, Guilin 541004, P. R. China
| | - Yun Zhang
- Guangxi Key Laboratory of Electrochemical and Magnetochemical Function Materials, College of Chemistry and Bioengineering, Guilin University of Technology, Guilin 541004, P. R. China
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Shrivas K, Patel S, Thakur SS, Shankar R. Food safety monitoring of the pesticide phenthoate using a smartphone-assisted paper-based sensor with bimetallic Cu@Ag core-shell nanoparticles. LAB ON A CHIP 2020; 20:3996-4006. [PMID: 32966488 DOI: 10.1039/d0lc00515k] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Presently, the use of several pesticides has been continuously rising owing to the increase in the production of food materials to meet the requirements of the growing population of the world. The safety of food materials with regards to pesticides is an important health concern for people. With this aim, we have developed a smartphone-assisted paper-based sensor impregnated with citrate capped Cu@Ag core-shell nanoparticles (NPs) for selective determination of phenthoate pesticides in water and food samples. The mechanism for selective detection is based on the high affinity of phenthoate to interact with silver NPs present on the surface of CuNPs, which results in aggregation and a change in the color of the paper device. Furthermore, the proposed mechanism and interaction of phenthoate with Cu@Ag NPs was theoretically investigated by density functional theory (DFT) using Gaussian 16.0 software. The linear range for the determination of phenthoate was found in the range of 50-1500 μg L-1, with a limit of detection of 15 μg L-1, and a 92.6 to 97.4% recovery, and the interference studies demonstrated the selectivity for the determination of the target analyte from complex sample matrices. Finally, paper impregnated with Cu@Ag was exploited for the monitoring of the phenthoate pesticide in different water and food samples. The advantages of this paper-based sensor, coupled with a smartphone readout system, are that is it is user-friendly, easy-to-use, cost-effective, and can be applied at the sample source compared to sophisticated analytical instruments.
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Affiliation(s)
- Kamlesh Shrivas
- School of Studies in Chemistry, Pt. Ravishankar Shukla University, Raipur, CG 492010, India.
| | - Sanyukta Patel
- Department of Chemistry, Government Nagarjuna Post Graduate College of Science, Raipur, CG-492010, India
| | - Santosh Singh Thakur
- Department of Chemistry, Guru Ghasidas Vishwavidyalaya, Koni, Bilaspur, CG 495009, India
| | - Ravi Shankar
- Nanoscience and Nanoengineering Program, South Dakota School of Mines and Technology, Rapid City, South Dakota-57701, USA
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Bordbar MM, Nguyen TA, Arduini F, Bagheri H. A paper-based colorimetric sensor array for discrimination and simultaneous determination of organophosphate and carbamate pesticides in tap water, apple juice, and rice. Mikrochim Acta 2020; 187:621. [PMID: 33084996 DOI: 10.1007/s00604-020-04596-x] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2020] [Accepted: 10/07/2020] [Indexed: 02/07/2023]
Abstract
A colorimetric paper-based sensor is proposed for the rapid monitoring of six major organophosphate and carbamate pesticides. The assay was constructed by dropping gold and silver nanoparticles on the hydrophilic zones of a paper substrate. The nanoparticles were modified by L-arginine, quercetin, and polyglutamic acid. The mechanism of sensing is based on the interaction between the pesticide and the nanoparticles. The color of nanoparticles changed during the interactions. A digital camera recorded these changes. The assay provided a unique response for each studied pesticide. This method can determine six individual pesticides including carbaryl, paraoxon, parathion, malathion, diazinon, and chlorpyrifos. The limit of detection for these pesticides were 29.0, 22.0, 32.0, 17.0, 45.0, and 36.0 ng mL-1, respectively. The assay was applied to simultaneously determine the six studied pesticides in a mixture using the partial least square method (PLS). The root mean square errors of prediction were 11, 8.7, 9.2, 10, 12, and 11 for carbaryl, paraoxon, parathion, malathion, diazinon, and chlorpyrifos, respectively. The paper-based device can differentiate two types of studied pesticide (organophosphate and carbamate) as well as two types of organophosphate structures (oxon and thion). Furthermore, this sensor showed high selectivity to the pesticides in the presence of other potential species (e.g., metal ions, anions, amino acids, sugar, and vitamins). This assay is capable of determining the pesticide compounds in tap water, apple juice, and rice samples.Graphical abstract.
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Affiliation(s)
- Mohammad Mahdi Bordbar
- Chemical Injuries Research Center, Systems Biology and Poisonings Institute, Baqiyatallah University of Medical Sciences, Tehran, Iran
| | - Tien Anh Nguyen
- Department of Physics, Le Quy Don Technical University, Hanoi, Vietnam
| | - Fabiana Arduini
- Department of Chemical Science and Technologies, University of Rome Tor Vergata, Via della Ricerca Scientifica, 00133, Rome, Italy
| | - Hasan Bagheri
- Chemical Injuries Research Center, Systems Biology and Poisonings Institute, Baqiyatallah University of Medical Sciences, Tehran, Iran.
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39
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Colorimetric Detection of Ammonia Using Synthesized Silver Nanoparticles from Durian Fruit Shell. J CHEM-NY 2020. [DOI: 10.1155/2020/4712130] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
There has been increased interest in the production of nanoparticles (NP) through green chemistry. This article used durian fruit shell aqueous solution that acts as a reductive preparation of silver NPs. The silver nanoparticles have a size of approximately 25 nm. The NP size uniformity was determined by the SEM and TEM analysis. X-ray diffraction technique was used to characterize crystalline silver nanoparticles face-centered cubic structure. XPS spectrum showed distinct silver peaks on the nanoparticles’ surface. An optical method that was based on surface plasmon resonance (SPR) was used to perform the green Ag NPs aqueous ammonia sensing study. Optical measurement facilitated the ammonia sensing study of Ag NPs that had been prepared. The study also investigated the performance of the optical sensor, thus adding validity to the study. Also, the research sought to determine how the concentration of ammonia in ammonia sensing affects the Ag NPs that had been obtained. The study observed a linear relationship with R2 as the correlation factor which was equal to 0.9831. This was observed from the ammonia concentration plot versus absorption ratio that suggested that there was a linear increase in absorption ratio with increase in ammonia concentration. The study significance is that the room temperature optical ammonia sensor can be used in future for medical diagnosis in the detection of low levels of ammonia in biological fluid like sweat, cerebrospinal fluid, saliva, plasma, or biological samples. This enhances the application of the technique in human biomedical applications.
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Sachdev A, Samanta P, Kumar V, Garima, Kandhal K, Matai I. PMAA-CeO 2 nanoparticle-based paper microfluidic device with customized image processing software for antioxidant assay. Anal Bioanal Chem 2020; 412:8197-8209. [PMID: 32995939 DOI: 10.1007/s00216-020-02960-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2020] [Revised: 09/10/2020] [Accepted: 09/18/2020] [Indexed: 12/21/2022]
Abstract
Despite recent advancements in the field of microfluidic paper-based analytical devices (μPADs), a key challenge remains in developing a simple and efficient μPAD with customized imaging capabilities for antioxidant assays. In the present study, we report a facile approach for μPAD fabrication through the application of transparent nail paint leading to creation of hydrophobic barriers and well-defined channels. The resultant μPADs were then characterized through scanning electron microscopy and contact angle measurements. The resolution and functional features of the fabricated μPAD were amenable to the intended assay. The μPAD's impregnated poly(methacrylic acid) (PMAA)-coated cerium oxide (CeO2) nanoparticles oxidized the 3,3',5,5'-tetramethylbenzidine (TMB) leading to the formation of a blue-colored charge-transfer complex. The addition of different antioxidant standard solutions resulted in a reduction in the blue color in a dose-dependent manner which could be observed visually. The color intensity of the PMAA-CeO2 nanoparticle@TMB oxidation product was inversely proportional to the antioxidant concentration and was measured using customized in-house MATLAB-based image processing software. Importantly, PMAA-CeO2 nanoparticle-based μPADs demonstrated good analytical characteristics and were able to be stored for long periods without any loss of activity. Moreover, potential interferents did not pose any threat to the colorimetric signal read-out for determination of antioxidant activity. The developed method was further applied for the assessment of antioxidant activity in a variety of tea samples and performed satisfactorily in comparison with a commonly used antioxidant detection method. Collectively, the developed μPAD-based platform holds great potential as a low-cost, convenient, portable and reliable method for pursuing various on-site antioxidant assays. Graphical Abstract.
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Affiliation(s)
- Abhay Sachdev
- Ubiquitous Analytical Techniques Division, CSIR-Central Scientific Instruments Organization (CSIR-CSIO), Chandigarh, 160030, India. .,Academy of Scientific and Innovative Research (AcSIR-CSIO), Chandigarh, 160030, India.
| | - Pradipta Samanta
- Ubiquitous Analytical Techniques Division, CSIR-Central Scientific Instruments Organization (CSIR-CSIO), Chandigarh, 160030, India.,Academy of Scientific and Innovative Research (AcSIR-CSIO), Chandigarh, 160030, India
| | - Vijayesh Kumar
- Ubiquitous Analytical Techniques Division, CSIR-Central Scientific Instruments Organization (CSIR-CSIO), Chandigarh, 160030, India
| | - Garima
- Ubiquitous Analytical Techniques Division, CSIR-Central Scientific Instruments Organization (CSIR-CSIO), Chandigarh, 160030, India.,Academy of Scientific and Innovative Research (AcSIR-CSIO), Chandigarh, 160030, India
| | - Karina Kandhal
- Ubiquitous Analytical Techniques Division, CSIR-Central Scientific Instruments Organization (CSIR-CSIO), Chandigarh, 160030, India
| | - Ishita Matai
- Ubiquitous Analytical Techniques Division, CSIR-Central Scientific Instruments Organization (CSIR-CSIO), Chandigarh, 160030, India. .,Academy of Scientific and Innovative Research (AcSIR-CSIO), Chandigarh, 160030, India.
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41
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Affiliation(s)
- Masaru Mitsushio
- Department of Chemistry, Biotechnology, and Chemical Engineering, Graduate School of Science and Engineering, Kagoshima University, 1-21-40 Korimoto, Kagoshima, Kagoshima, 890-0065, Japan
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42
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Li D, Xu X, Li Z, Wang T, Wang C. Detection methods of ammonia nitrogen in water: A review. Trends Analyt Chem 2020. [DOI: 10.1016/j.trac.2020.115890] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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Moradi F, Sedaghat S, Moradi O, Arab Salmanabadi S. Review on green nano-biosynthesis of silver nanoparticles and their biological activities: with an emphasis on medicinal plants. INORG NANO-MET CHEM 2020. [DOI: 10.1080/24701556.2020.1769662] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Fatemeh Moradi
- Department of Chemistry, College of Science, Shahr-e-Qods Branch, Islamic Azad University, Shahr-e-Qods, Iran
| | - Sajjad Sedaghat
- Department of Chemistry, College of Science, Shahr-e-Qods Branch, Islamic Azad University, Shahr-e-Qods, Iran
| | - Omid Moradi
- Department of Chemistry, College of Science, Shahr-e-Qods Branch, Islamic Azad University, Shahr-e-Qods, Iran
| | - Samira Arab Salmanabadi
- Department of Chemistry, College of Science, Shahr-e-Qods Branch, Islamic Azad University, Shahr-e-Qods, Iran
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Masson JF. Portable and field-deployed surface plasmon resonance and plasmonic sensors. Analyst 2020; 145:3776-3800. [PMID: 32374303 DOI: 10.1039/d0an00316f] [Citation(s) in RCA: 61] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Plasmonic sensors are ideally suited for the design of small, integrated, and portable devices that can be employed in situ for the detection of analytes relevant to environmental sciences, clinical diagnostics, infectious diseases, food, and industrial applications. To successfully deploy plasmonic sensors, scaled-down analytical devices based on surface plasmon resonance (SPR) and localized surface plasmon resonance (LSPR) must integrate optics, plasmonic materials, surface chemistry, fluidics, detectors and data processing in a functional instrument with a small footprint. The field has significantly progressed from the implementation of the various components in specifically designed prism-based instruments to the use of nanomaterials, optical fibers and smartphones to yield increasingly portable devices, which have been shown for a number of applications in the laboratory and deployed on site for environmental, biomedical/clinical, and food applications. A roadmap to deploy plasmonic sensors is provided by reviewing the current successes and by laying out the directions the field is currently taking to increase the use of field-deployed plasmonic sensors at the point-of-care, in the environment and in industries.
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Affiliation(s)
- Jean-Francois Masson
- Departement de chimie, Centre Québécois sur les Matériaux Fonctionnels (CQMF) and Regroupement Québécois sur les Matériaux de Pointe (RQMP), Université de Montréal, CP 6128 Succ. Centre-Ville, Montreal, QC, CanadaH3C 3J7.
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45
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A smartphone-based bioassay for determining relative potency estimated from sigmoidal-response curves and respective measurement uncertainty. Microchem J 2020. [DOI: 10.1016/j.microc.2020.104626] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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Rostami S, Mehdinia A, Niroumand R, Jabbari A. Enhanced LSPR performance of graphene nanoribbons-silver nanoparticles hybrid as a colorimetric sensor for sequential detection of dopamine and glutathione. Anal Chim Acta 2020; 1120:11-23. [PMID: 32475387 DOI: 10.1016/j.aca.2020.04.060] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2020] [Revised: 03/31/2020] [Accepted: 04/25/2020] [Indexed: 01/17/2023]
Abstract
In the present study, a novel plasmonic sensing platform was proposed for sequential colorimetric detection of dopamine (DA) and glutathione (GSH) in human serum sample by taking advantage of plasmon hybridization in graphene nanoribbons/sliver nanoparticles (GNR/Ag NPs) hybrid. DA was detected based on etching strategy and morphology transition of label-free Ag NPs hybridized with GNR. As a result of the etching process, hexagonal Ag NPs were changed to smaller corner-truncated nanoparticles and a blue shift was observed in its plasmonic band, accompanied by the color change from green to red. Sequentially, GSH induced aggregation of Ag NPs which resulted in a decrease in absorption intensity of Ag NPs plasmonic band and a color change from red to gray. By employing GNR/Ag NPs hybrid as a sensitive colorimetric sensor, DA and GSH were successfully detected in low concentrations of 0.04 μM and 0.23 μM, respectively. The same experiment was carried out in the absence of GNR and the detection limits were obtained 0.46 and 1.2 μM for DA and GSH, respectively. These results confirmed the effective role of GNR on the sensitivity improvement of GNR/Ag NPs hybrid. The proposed simple and sensitive sensing approach offered a beneficial and promising platform for sequential detection of DA and GSH in the biological samples.
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Affiliation(s)
- Simindokht Rostami
- Department of Analytical Chemistry, Faculty of Chemistry, K. N. Toosi University of Technology, Tehran, Iran
| | - Ali Mehdinia
- Department of Marine Living Science, Ocean Sciences Research Center, Iranian National Institute for Oceanography and Atmospheric Science, Tehran, Iran.
| | - Ramin Niroumand
- Department of Analytical Chemistry, Faculty of Chemistry, K. N. Toosi University of Technology, Tehran, Iran
| | - Ali Jabbari
- Department of Analytical Chemistry, Faculty of Chemistry, K. N. Toosi University of Technology, Tehran, Iran
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Nour HF, El Malah T. Rapid naked-eye colorimetric detection of gaseous alkaline analytes using rhodamine B hydrazone-coated silica strips. NEW J CHEM 2020. [DOI: 10.1039/d0nj01044h] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Development of rhodamine B hydrazone-coated silica strips for rapid detection of alkaline vapors by the naked-eye or using a smartphone camera.
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Affiliation(s)
- Hany F. Nour
- Photochemistry Department, Chemical Industries Research Division
- National Research Centre
- Cairo
- Egypt
| | - Tamer El Malah
- Photochemistry Department, Chemical Industries Research Division
- National Research Centre
- Cairo
- Egypt
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Paper-based colorimetric probe for highly sensitive detection of folic acid based on open-ring form amplification of rhodamine B derivative. J IND ENG CHEM 2020. [DOI: 10.1016/j.jiec.2019.09.025] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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49
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Field analysis free chlorine in water samples by a smartphone-based colorimetric device with improved sensitivity and accuracy. Microchem J 2019. [DOI: 10.1016/j.microc.2019.104200] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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50
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Plasmonic-based platforms for diagnosis of infectious diseases at the point-of-care. Biotechnol Adv 2019; 37:107440. [PMID: 31476421 DOI: 10.1016/j.biotechadv.2019.107440] [Citation(s) in RCA: 65] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2019] [Accepted: 08/21/2019] [Indexed: 12/17/2022]
Abstract
Infectious diseases such as HIV-1/AIDS, tuberculosis (TB), hepatitis B (HBV), and malaria still exert a tremendous health burden on the developing world, requiring rapid, simple and inexpensive diagnostics for on-site diagnosis and treatment monitoring. However, traditional diagnostic methods such as nucleic acid tests (NATs) and enzyme linked immunosorbent assays (ELISA) cannot be readily implemented in point-of-care (POC) settings. Recently, plasmonic-based biosensors have emerged, offering an attractive solution to manage infectious diseases in the developing world since they can achieve rapid, real-time and label-free detection of various pathogenic biomarkers. Via the principle of plasmonic-based optical detection, a variety of biosensing technologies such as surface plasmon resonance (SPR), localized surface plasmon resonance (LSPR), colorimetric plasmonic assays, and surface enhanced Raman spectroscopy (SERS) have emerged for early diagnosis of HIV-1, TB, HBV and malaria. Similarly, plasmonic-based colorimetric assays have also been developed with the capability of multiplexing and cellphone integration, which is well suited for POC testing in the developing world. Herein, we present a comprehensive review on recent advances in surface chemistry, substrate fabrication, and microfluidic integration for the development of plasmonic-based biosensors, aiming at rapid management of infectious diseases at the POC, and thus improving global health.
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