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Sabbaghi N, Dadfarnia S, Haji Shabani AM, Farsadrooh M. Dispersive micro solid phase extraction of glibenclamide from plasma, urine, and wastewater using a magnetic molecularly imprinted polymer followed by its determination by a high-performance liquid chromatography-photodiode array detector. RSC Adv 2024; 14:13168-13179. [PMID: 38655471 PMCID: PMC11037031 DOI: 10.1039/d4ra00452c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2024] [Accepted: 04/08/2024] [Indexed: 04/26/2024] Open
Abstract
The present study describes the development of a simple and selective analytical method for dispersive micro solid phase extraction and determination of glibenclamide (GLB) using magnetic molecularly imprinted polymer (MMIP) as a sorbent. MMIP was fabricated by the non-covalent method on the surface of silicated Fe3O4 and had a high affinity for glibenclamide; dual monomers, itaconic acid and allylamine, were used for this. Polymerization was achieved by the precipitation method in the presence of glibenclamide as the template and ethylene glycol dimethacrylate as the cross-linker. The morphology and structural properties of the MMIP were characterized by different analytical methods. To achieve maximum extraction efficiency, influencing parameters were optimized. The linearity range was 1-2000 and 12-2000 μg L-1 by high-performance liquid chromatography-photodiode array detector (HPLC-PDA) and UV-vis spectroscopy, respectively. The detection and quantification limits with UV-vis and HPLC-PDA analyses were 4 and 12 μg L-1 and 0.3 and 1 μg L-1, respectively. Under optimized conditions, recovery of glibenclamide spiked in plasma, human urine, and wastewater was between 89.4 and 102.9% at the concentration levels of 25, 250, and 500 μg L-1; relative standard deviations were below 3.7% by HPLC-PDA. The developed method has a favorable pre-concentration factor of 140.0. Equilibrium data and sorption isotherms fitted well with the Langmuir model. A maximum sorption capacity of 24.260 mg g-1 was acquired based on the Langmuir model. The synthesized sorbent with high selectivity was used to separate GLB from complex biological systems and wastewater before measurement with UV-vis or HPLC-PDA.
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Affiliation(s)
- Najmeh Sabbaghi
- Department of Chemistry, Faculty of Science, Yazd University 89195-741 Yazd Iran
| | - Shayessteh Dadfarnia
- Department of Chemistry, Faculty of Science, Yazd University 89195-741 Yazd Iran
| | | | - Majid Farsadrooh
- Renewable Energies Research Laboratory, Department of Chemistry, Faculty of Science, University of Sistan and Baluchestan P.O. Box 98135 674 Zahedan Iran
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Ren X, Song X, Wang L, Ma W, Li X. Surface-enhanced Raman scattering using flower-like Ag/ZnO as active substrates for the label-free and sensitive detection of rhodamine 6G and melamine. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2024; 16:411-419. [PMID: 38165144 DOI: 10.1039/d3ay01650a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/03/2024]
Abstract
The reliable and accurate detection of unauthorized additives in food is significant to prevent health risks. In recent years, surface-enhanced Raman spectroscopy (SERS) with fast, simple, and sensitive capabilities has been widely used for food safety analysis. In order to detect illegally added dye molecule rhodamine 6G and small molecule melamine in food, we have proposed a fast, convenient, and label-free SERS detection technology using flower-like Ag/ZnO as the SERS substrate. The structure and morphology of the flower-like Ag/ZnO were characterized by scanning electron microscopy, energy dispersive spectrometery, transmission electron microscopy, and X-ray diffraction analysis. We investigated the SERS effect and sensitivity of flower-like Ag/ZnO toward rhodamine 6G and melamine. The synergistic effect of flower-like Ag/ZnO provides high SERS activity for the detection of rhodamine 6G and melamine at the lowest detection concentrations of 0.5 ng mL-1 and 1.0 ng mL-1, respectively. Therefore, flower-like Ag/ZnO with good sensitivity and uniformity has potential for improving the detection of illegal food additives.
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Affiliation(s)
- Xiaohui Ren
- College of Textile and Clothing, Yancheng Institute of Technology, Yancheng 224051, China.
| | - Xinyue Song
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, State Key Lab of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China.
| | - Lili Wang
- College of Textile and Clothing, Yancheng Institute of Technology, Yancheng 224051, China.
| | - Wenjie Ma
- College of Textile and Clothing, Yancheng Institute of Technology, Yancheng 224051, China.
| | - Xin Li
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, State Key Lab of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China.
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Minh DTC, Tram LTB, Phong NH, Huong HTL, Vu LV, Thi LA, Anh NTK, Ha PTT. Single versus Double Coffee-Ring Effect Patterns in Thin-Layer Chromatography Coupled with Surface-Enhanced Raman Spectroscopic Analysis of Anti-Diabetic Drugs Adulterated in Herbal Products. Molecules 2023; 28:5492. [PMID: 37513365 PMCID: PMC10386024 DOI: 10.3390/molecules28145492] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2023] [Revised: 07/11/2023] [Accepted: 07/15/2023] [Indexed: 07/30/2023] Open
Abstract
In thin-layer chromatography coupled with surface-enhanced Raman spectroscopy (TLC-SERS), the coffee ring effect (CRE) describes the formation of a ring-shape spot (blank in the middle and darker on the edge) caused by the aggregation of silver nanoparticles (Ag NPs), alone (single CRE) or with the analytes (double CRE). In this work, the SCRE and DCRE were investigated in two anti-diabetic drugs, hydrophobic glibenclamide (GLB) and more hydrophilic metformin (MET). The SCRE occurred in GLB analysis, as opposed to the DCRE that occurred in MET. It was proven that for optimization of the TLC-SERS analytical procedure, it is necessary to distinguish the CRE patterns of analytes. Additionally, MET and GLB were analyzed with the developed TLC-SERS method and confirmed by another validated method using high-performance liquid chromatography. Four herbal products collected on the market were found to be adulterated with GLB or/and MET; among those, one product was adulterated with both MET and GLB, and two products were adulterated with GLB at a higher concentration than the usual GLB prescription dose. The TLC-SERS method provided a useful tool for the simultaneous detection of adulterated anti-diabetic herbal products, and the comparison of the SCRE and DCRE provided more evidence to predict CRE patterns in TLC-SERS.
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Affiliation(s)
- Dao Thi Cam Minh
- Faculty of Pharmacy, University of Medicine and Pharmacy, Hue University, Hue 530000, Vietnam
| | - Le Thi Bao Tram
- Faculty of Pharmacy, University of Medicine and Pharmacy, Hue University, Hue 530000, Vietnam
| | - Nguyen Hai Phong
- Department of Chemistry, University of Sciences, Hue University, Hue 530000, Vietnam
| | - Hoang Thi Lan Huong
- Drug, Cosmetic and Food Quality Control Center of Thua Thien Hue Province, Hue 530000, Vietnam
| | - Le Van Vu
- Faculty of Physics, VNU University of Science, Hanoi 100000, Vietnam
| | - Le Anh Thi
- Institute of Research and Development, Duy Tan University, Danang 550000, Vietnam
- Faculty of Natural Sciences, Duy Tan University, Da Nang 550000, Vietnam
| | - Nguyen Thi Kieu Anh
- Department of Analytical Chemistry and Drug Quality Control, Hanoi University of Pharmacy, Hanoi 100000, Vietnam
| | - Pham Thi Thanh Ha
- Department of Analytical Chemistry and Drug Quality Control, Hanoi University of Pharmacy, Hanoi 100000, Vietnam
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Lan T, Zhao Y, Du Y, Ma C, Wang R, Zhang Q, Wang S, Wei W, Yuan H, Huang Q. Fabrication of a Novel Au Star@AgAu Yolk-Shell Nanostructure for Ovarian Cancer Early Diagnosis and Targeted Therapy. Int J Nanomedicine 2023; 18:3813-3824. [PMID: 37457800 PMCID: PMC10348339 DOI: 10.2147/ijn.s413457] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2023] [Accepted: 06/22/2023] [Indexed: 07/18/2023] Open
Abstract
Purpose A novel CYPA-targeted, SiO2 encapsulated Au star@AgAu yolk-shell nanostructure (YSNS) was synthesized and used for ovarian cancer early diagnosis and therapy. Methods Diverse spectroscopic and microscopic methods were utilized to investigate the pattern of the yolk-shell nanostructure. In addition, in vitro and in vivo experiments were carried out. Results It can be found that the ratio of HAuCl4 and AgNO3 played a critical role in the constitution of the yolk-shell nanostructure. The as-prepared yolk-shell nanostructure showed excellent SERS performance, which could be utilized as SERS substrate for specific sensitivity analysis of ovarian cancer markers cyclophilin A (CYPA) with detectable limit of 7.76*10-10 μg/mL. In addition, the as-prepared yolk-shell nanostructure possessed outstanding photothermal performance, which could be used as photothermal agent for ovarian cancer therapy. Experiments in vitro and in vivo proved that the as-prepared yolk-shell nanostructures are ideal candidate for early diagnosis and therapy for ovarian cancer in one platform. Conclusion This work holds promise to offer a new method for the detection and therapy of ovarian cancer in the early stage.
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Affiliation(s)
- Ting Lan
- Medical Technology School of Xuzhou Medical University, Xuzhou City, Jiangsu, 221000, People’s Republic of China
| | - Yang Zhao
- Medical Technology School of Xuzhou Medical University, Xuzhou City, Jiangsu, 221000, People’s Republic of China
- Public Experimental Research Center of Xuzhou Medical University, Xuzhou City, Jiangsu, 221004, People’s Republic of China
| | - Yu Du
- Medical Technology School of Xuzhou Medical University, Xuzhou City, Jiangsu, 221000, People’s Republic of China
- Xuzhou Center for Disease Control and Prevention, Xuzhou City, Jiangsu, 221006, People’s Republic of China
| | - Chunyi Ma
- Medical Technology School of Xuzhou Medical University, Xuzhou City, Jiangsu, 221000, People’s Republic of China
| | - Rui Wang
- Medical Technology School of Xuzhou Medical University, Xuzhou City, Jiangsu, 221000, People’s Republic of China
| | - Qianlei Zhang
- Medical Technology School of Xuzhou Medical University, Xuzhou City, Jiangsu, 221000, People’s Republic of China
| | - Shanshan Wang
- Medical Technology School of Xuzhou Medical University, Xuzhou City, Jiangsu, 221000, People’s Republic of China
| | - Wenxian Wei
- Testing Center, Yangzhou University, Yangzhou City, Jiangsu, 225009, People’s Republic of China
| | - Honghua Yuan
- Public Experimental Research Center of Xuzhou Medical University, Xuzhou City, Jiangsu, 221004, People’s Republic of China
| | - Qingli Huang
- Medical Technology School of Xuzhou Medical University, Xuzhou City, Jiangsu, 221000, People’s Republic of China
- Public Experimental Research Center of Xuzhou Medical University, Xuzhou City, Jiangsu, 221004, People’s Republic of China
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Ramajayam K, Ganesan S, Ramesh P, Beena M, Kokulnathan T, Palaniappan A. Molecularly Imprinted Polymer-Based Biomimetic Systems for Sensing Environmental Contaminants, Biomarkers, and Bioimaging Applications. Biomimetics (Basel) 2023; 8:245. [PMID: 37366840 DOI: 10.3390/biomimetics8020245] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2023] [Revised: 05/20/2023] [Accepted: 06/02/2023] [Indexed: 06/28/2023] Open
Abstract
Molecularly imprinted polymers (MIPs), a biomimetic artificial receptor system inspired by the human body's antibody-antigen reactions, have gained significant attraction in the area of sensor development applications, especially in the areas of medical, pharmaceutical, food quality control, and the environment. MIPs are found to enhance the sensitivity and specificity of typical optical and electrochemical sensors severalfold with their precise binding to the analytes of choice. In this review, different polymerization chemistries, strategies used in the synthesis of MIPs, and various factors influencing the imprinting parameters to achieve high-performing MIPs are explained in depth. This review also highlights the recent developments in the field, such as MIP-based nanocomposites through nanoscale imprinting, MIP-based thin layers through surface imprinting, and other latest advancements in the sensor field. Furthermore, the role of MIPs in enhancing the sensitivity and specificity of sensors, especially optical and electrochemical sensors, is elaborated. In the later part of the review, applications of MIP-based optical and electrochemical sensors for the detection of biomarkers, enzymes, bacteria, viruses, and various emerging micropollutants like pharmaceutical drugs, pesticides, and heavy metal ions are discussed in detail. Finally, MIP's role in bioimaging applications is elucidated with a critical assessment of the future research directions for MIP-based biomimetic systems.
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Affiliation(s)
- Kalaipriya Ramajayam
- Department of Chemistry, School of Advanced Sciences, Vellore Institute of Technology (VIT), Vellore 632014, Tamil Nadu, India
- Centre for Biomaterials, Cellular and Molecular Theranostics (CBCMT), Vellore Institute of Technology (VIT), Vellore 632014, Tamil Nadu, India
| | - Selvaganapathy Ganesan
- Department of Chemistry, School of Advanced Sciences, Vellore Institute of Technology (VIT), Vellore 632014, Tamil Nadu, India
- Centre for Biomaterials, Cellular and Molecular Theranostics (CBCMT), Vellore Institute of Technology (VIT), Vellore 632014, Tamil Nadu, India
| | - Purnimajayasree Ramesh
- Centre for Biomaterials, Cellular and Molecular Theranostics (CBCMT), Vellore Institute of Technology (VIT), Vellore 632014, Tamil Nadu, India
- School of Biosciences and Technology, Vellore Institute of Technology (VIT), Vellore 632014, Tamil Nadu, India
| | - Maya Beena
- Centre for Biomaterials, Cellular and Molecular Theranostics (CBCMT), Vellore Institute of Technology (VIT), Vellore 632014, Tamil Nadu, India
- School of Biosciences and Technology, Vellore Institute of Technology (VIT), Vellore 632014, Tamil Nadu, India
| | - Thangavelu Kokulnathan
- Department of Electro-Optical Engineering, National Taipei University of Technology, Taipei 106, Taiwan
| | - Arunkumar Palaniappan
- Centre for Biomaterials, Cellular and Molecular Theranostics (CBCMT), Vellore Institute of Technology (VIT), Vellore 632014, Tamil Nadu, India
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Rodà F, Picciolini S, Mangolini V, Gualerzi A, Seneci P, Renda A, Sesana S, Re F, Bedoni M. Raman Spectroscopy Characterization of Multi-Functionalized Liposomes as Drug-Delivery Systems for Neurological Disorders. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:699. [PMID: 36839067 PMCID: PMC9962107 DOI: 10.3390/nano13040699] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/17/2023] [Revised: 02/06/2023] [Accepted: 02/09/2023] [Indexed: 06/18/2023]
Abstract
The characterization of nanoparticle-based drug-delivery systems represents a crucial step in achieving a comprehensive overview of their physical, chemical, and biological features and evaluating their efficacy and safety in biological systems. We propose Raman Spectroscopy (RS) for the characterization of liposomes (LPs) to be tested for the control of neuroinflammation and microglial dysfunctions in Glioblastoma multiforme and Alzheimer's disease. Drug-loaded LPs were functionalized to cross the blood-brain barrier and to guarantee localized and controlled drug release. The Raman spectra of each LP component were used to evaluate their contribution in the LP Raman fingerprint. Raman data analysis made it possible to statistically discriminate LPs with different functionalization patterns, showing that each molecular component has an influence in the Raman spectrum of the final LP formulation. Moreover, CLS analysis on Raman data revealed a good level of synthetic reproducibility of the formulations and confirmed their stability within one month from their synthesis, demonstrating the ability of the technique to evaluate the efficacy of LP synthesis using small amount of sample. RS represents a valuable tool for a fast, sensitive and label free biochemical characterization of LPs that could be used for quality control of nanoparticle-based therapeutics.
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Affiliation(s)
- Francesca Rodà
- IRCCS Fondazione Don Carlo Gnocchi ONLUS, 20148 Milan, Italy
- Clinical and Experimental Medicine PhD Program, University of Modena and Reggio Emilia, 41121 Modena, Italy
| | | | - Valentina Mangolini
- IRCCS Fondazione Don Carlo Gnocchi ONLUS, 20148 Milan, Italy
- Department of Molecular and Translational Medicine, University of Brescia, 25121 Brescia, Italy
| | - Alice Gualerzi
- IRCCS Fondazione Don Carlo Gnocchi ONLUS, 20148 Milan, Italy
| | - Pierfausto Seneci
- Chemistry Department, Università Degli Studi di Milano, 20133 Milan, Italy
| | - Antonio Renda
- School of Medicine and Surgery, University of Milano-Bicocca, 20854 Vedano al Lambro, Italy
| | - Silvia Sesana
- School of Medicine and Surgery, University of Milano-Bicocca, 20854 Vedano al Lambro, Italy
| | - Francesca Re
- School of Medicine and Surgery, University of Milano-Bicocca, 20854 Vedano al Lambro, Italy
| | - Marzia Bedoni
- IRCCS Fondazione Don Carlo Gnocchi ONLUS, 20148 Milan, Italy
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Effective adsorption and in-situ SERS detection of multi-target pesticides on fruits and vegetables using bead-string like Ag NWs@ZIF-8 core-shell nanochains. Food Chem 2022; 395:133623. [DOI: 10.1016/j.foodchem.2022.133623] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2022] [Revised: 06/29/2022] [Accepted: 06/30/2022] [Indexed: 11/23/2022]
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Kadhem AJ, Gentile GJ, Fidalgo de Cortalezzi MM. Molecularly Imprinted Polymers (MIPs) in Sensors for Environmental and Biomedical Applications: A Review. Molecules 2021; 26:6233. [PMID: 34684813 PMCID: PMC8540986 DOI: 10.3390/molecules26206233] [Citation(s) in RCA: 32] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2021] [Revised: 10/06/2021] [Accepted: 10/12/2021] [Indexed: 01/30/2023] Open
Abstract
Molecular imprinted polymers are custom made materials with specific recognition sites for a target molecule. Their specificity and the variety of materials and physical shapes in which they can be fabricated make them ideal components for sensing platforms. Despite their excellent properties, MIP-based sensors have rarely left the academic laboratory environment. This work presents a comprehensive review of recent reports in the environmental and biomedical fields, with a focus on electrochemical and optical signaling mechanisms. The discussion aims to identify knowledge gaps that hinder the translation of MIP-based technology from research laboratories to commercialization.
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Affiliation(s)
- Abbas J. Kadhem
- Department of Civil and Environmental Engineering, University of Missouri, E2509 Lafferre Hall, Columbia, MO 65211, USA;
| | - Guillermina J. Gentile
- Department of Chemical Engineering, Instituto Tecnológico de Buenos Aires, Lavardén 315, Buenos Aires C1437FBG, Argentina;
| | - Maria M. Fidalgo de Cortalezzi
- Department of Civil and Environmental Engineering, University of Missouri, E2509 Lafferre Hall, Columbia, MO 65211, USA;
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Jiang S, Chang L, Luo J, Zhang J, Liu X, Lee CY, Zhang W. Fabrication of a honeycomb-like bimetallic SERS substrate for the detection of triphenyltin chloride. Analyst 2021; 146:6170-6177. [PMID: 34522939 DOI: 10.1039/d1an01359a] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Triphenyltin chloride (TPhT) is an organotin compound that causes intensive toxicological risk to the environment and humans. A detection method with high sensitivity and stability is therefore desired to better detect TPhT. In this study, a novel SERS substrate was prepared by sputtering an ultra-thin Au layer on a honeycomb-like silver nanoarray fabricated via the nanosphere lithography method. The ultra-thin Au layer was formed by sputtering the intermittent Au nanoparticles on the silver nanoarray, resulting in bimetallic coupling with dramatically increased hotspots and extremely high SERS enhancement with an analytical enhancement factor (AEF) of 6.08 × 109 using Rhodamine 6G (R6G) as the probe molecule. Based on density functional theory (DFT) simulations, the Raman characteristic peaks of TPhT at 999 cm-1 and 655 cm-1 were selected for TPhT detection. The AEF of the SERS substrate HC5-AgAu was calculated to be 3.38 × 106 with the detection concentration of TPhT down to 10-10 M. The as-prepared honeycomb-like silver-gold bimetallic SERS substrate demonstrated great stability and sensitivity for TPhT detection, which might also be applied in monitoring many other environmental pollutants.
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Affiliation(s)
- Shan Jiang
- Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 400714, P. R. China. .,College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Lin Chang
- Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 400714, P. R. China. .,College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Jie Luo
- College of Advanced Interdisciplinary Studies & Hunan Provincial Key Laboratory of Novel Nano-Optoelectronic Information Materials and Devices, National University of Defense Technology, Changsha 410073, P. R. China
| | - Jianfa Zhang
- College of Advanced Interdisciplinary Studies & Hunan Provincial Key Laboratory of Novel Nano-Optoelectronic Information Materials and Devices, National University of Defense Technology, Changsha 410073, P. R. China
| | - Xiaohong Liu
- Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 400714, P. R. China.
| | - Chong-Yew Lee
- School of Pharmaceutical Sciences, Universiti Sains Malaysia, Penang 11800, Malaysia
| | - Wei Zhang
- Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 400714, P. R. China. .,College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, P. R. China
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Preparation of silver with an ultrathin molecular imprinted layer for detection of carbendazim by SERS. CHEMICAL PAPERS 2021. [DOI: 10.1007/s11696-021-01811-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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Dendritic Forest-Like Ag Nanostructures Prepared Using Fluoride-Assisted Galvanic Replacement Reaction for SERS Applications. NANOMATERIALS 2021; 11:nano11061359. [PMID: 34063866 PMCID: PMC8223998 DOI: 10.3390/nano11061359] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Revised: 05/18/2021] [Accepted: 05/18/2021] [Indexed: 01/02/2023]
Abstract
Dendritic forest-like Ag nanostructures were deposited on a silicon wafer through fluoride-assisted galvanic replacement reaction (FAGRR) in aqueous AgNO3 and buffered oxide etchant. The prepared nanostructures were characterized using scanning electron microscopy, energy-dispersive X-ray spectroscopy, inductively coupled plasma–optical emission spectroscopy, a surface profiler (alpha step), and X-ray diffraction. Additionally, the dendritic forest-like Ag nanostructures were characterized using surface-enhanced Raman scattering (SERS) when a 4-mercaptobenzoic acid (4-MBA) monolayer was adsorbed on the Ag surface. The Ag nanostructures exhibited intense SERS signal from 4-MBA because of their rough surface, and this intense signal led to an intense local electromagnetic field upon electromagnetic excitation. The enhancement factor for 4-MBA molecules adsorbed on the Ag nanostructures was calculated to be 9.18 × 108. Furthermore, common Raman reporters such as rhodamine 6G, 4-aminothiolphenol, 5,5′-dithiobis-2-nitrobenzoic acid, and carboxyfluorescein (FAM) were characterized on these dendritic forest-like Ag nanostructures, leading to the development of an ultrasensitive SERS-based DNA sensor with a limit of detection of 33.5 nM of 15-mer oligonucleotide.
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Ong JJ, Pollard TD, Goyanes A, Gaisford S, Elbadawi M, Basit AW. Optical biosensors - Illuminating the path to personalized drug dosing. Biosens Bioelectron 2021; 188:113331. [PMID: 34038838 DOI: 10.1016/j.bios.2021.113331] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2020] [Revised: 05/06/2021] [Accepted: 05/08/2021] [Indexed: 02/06/2023]
Abstract
Optical biosensors are low-cost, sensitive and portable devices that are poised to revolutionize the medical industry. Healthcare monitoring has already been transformed by such devices, with notable recent applications including heart rate monitoring in smartwatches and COVID-19 lateral flow diagnostic test kits. The commercial success and impact of existing optical sensors has galvanized research in expanding its application in numerous disciplines. Drug detection and monitoring seeks to benefit from the fast-approaching wave of optical biosensors, with diverse applications ranging from illicit drug testing, clinical trials, monitoring in advanced drug delivery systems and personalized drug dosing. The latter has the potential to significantly improve patients' lives by minimizing toxicity and maximizing efficacy. To achieve this, the patient's serum drug levels must be frequently measured. Yet, the current method of obtaining such information, namely therapeutic drug monitoring (TDM), is not routinely practiced as it is invasive, expensive, time-consuming and skilled labor-intensive. Certainly, optical sensors possess the capabilities to challenge this convention. This review explores the current state of optical biosensors in personalized dosing with special emphasis on TDM, and provides an appraisal on recent strategies. The strengths and challenges of optical biosensors are critically evaluated, before concluding with perspectives on the future direction of these sensors.
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Affiliation(s)
- Jun Jie Ong
- Department of Pharmaceutics, UCL School of Pharmacy, University College London, 29-39 Brunswick Square, London, WC1N 1AX, United Kingdom
| | - Thomas D Pollard
- Department of Pharmaceutics, UCL School of Pharmacy, University College London, 29-39 Brunswick Square, London, WC1N 1AX, United Kingdom
| | - Alvaro Goyanes
- Department of Pharmaceutics, UCL School of Pharmacy, University College London, 29-39 Brunswick Square, London, WC1N 1AX, United Kingdom; Departamento de Farmacología, Farmacia y Tecnología Farmacéutica, I+D Farma Group (GI-1645), Universidade de Santiago de Compostela, 15782, Spain
| | - Simon Gaisford
- Department of Pharmaceutics, UCL School of Pharmacy, University College London, 29-39 Brunswick Square, London, WC1N 1AX, United Kingdom
| | - Mohammed Elbadawi
- Department of Pharmaceutics, UCL School of Pharmacy, University College London, 29-39 Brunswick Square, London, WC1N 1AX, United Kingdom
| | - Abdul W Basit
- Department of Pharmaceutics, UCL School of Pharmacy, University College London, 29-39 Brunswick Square, London, WC1N 1AX, United Kingdom.
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Cheshari EC, Ren X, Li X. Core–shell Ag-dual template molecularly imprinted composite for detection of carbamate pesticide residues. CHEMICAL PAPERS 2021. [DOI: 10.1007/s11696-021-01594-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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Ren X, Feng X, Jin M, Li X. Dummy molecular imprinted polymers coated with silver microspheres via surface enhanced Raman scattering for sensitive detection of benzimidazole. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2021; 249:119321. [PMID: 33360208 DOI: 10.1016/j.saa.2020.119321] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/18/2020] [Revised: 11/22/2020] [Accepted: 12/05/2020] [Indexed: 06/12/2023]
Abstract
Dummy molecular imprinted polymers (MIPs) with carbendazim as a dummy template coated with Ag microspheres were fabricated in N, N-dimethylformamide solution via a surface-enhanced Raman scattering (SERS) enhancement for detection of benzimidazole by using methylacrylamide and ethylene glycol dimethacrylate as the functional monomer and cross-linker, respectively. The scanning electron microscope, transmission electron microscope, energy dispersive spectrometer, particle size distribution analysis, and X-ray diffraction were used to perform the morphology, size, and crystal structure for prepared Ag@dummy MIPs. Under the optimal conditions, the SERS detection method presented good linearity with concentrations in the range of 1.0 × 10-3 ~ 1.0 × 10-8 mol L-1 for benzimidazole at 774 cm-1 and 1004 cm-1, respectively. And the minimum detection concentration of this method was as low as 1.0 × 10-8 mol L-1. Besides, Ag@dummy MIPs exhibited satisfactory sensitivity and selectivity to benzimidazole instead of carbendazim due to the dummy imprinting technology to eliminate the background noise interference. The reusability result of Ag@dummy MIPs was shown that the characteristic peaks of benzimidazole are still obvious after four times of repeated detection. This method provided an effective way to develop a qualitative and semi-quantitative analysis of benzimidazole in complex matrices.
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Affiliation(s)
- Xiaohui Ren
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, State Key Lab of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Xiaoxiang Feng
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, State Key Lab of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Ming Jin
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, State Key Lab of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Xin Li
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, State Key Lab of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China.
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