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Talebian Gevari M, Sahu SS, Stridfeldt F, Hååg P, De Petris L, Viktorsson K, Lewensohn R, Gori A, Cretich M, Dev A. Design and Optimization of a Silicon-Based Electrokinetic Microchip for Sensitive Detection of Small Extracellular Vesicles. ACS Sens 2024; 9:2935-2945. [PMID: 38848141 PMCID: PMC11217933 DOI: 10.1021/acssensors.4c00110] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2024] [Revised: 05/24/2024] [Accepted: 05/29/2024] [Indexed: 06/09/2024]
Abstract
Detection of analytes using streaming current has previously been explored using both experimental approaches and theoretical analyses of such data. However, further developments are needed for establishing a viable microchip that can be exploited to deliver a sensitive, robust, and scalable biosensor device. In this study, we demonstrated the fabrication of such a device on silicon wafer using a scalable silicon microfabrication technology followed by characterization and optimization of this sensor for detection of small extracellular vesicles (sEVs) with sizes in the range of 30 to 200 nm, as determined by nanoparticle tracking analyses. We showed that the sensitivity of the devices, assessed by a common protein-ligand pair and sEVs, significantly outperforms previous approaches using the same principle. Two versions of the microchips, denoted as enclosed and removable-top microchips, were developed and compared, aiming to discern the importance of high-pressure measurement versus easier and better surface preparation capacity. A custom-built chip manifold allowing easy interfacing with standard microfluidic connections was also constructed. By investigating different electrical, fluidic, morphological, and fluorescence measurements, we show that while the enclosed microchip with its robust glass-silicon bonding can withstand higher pressure and thus generate higher streaming current, the removable-top configuration offers several practical benefits, including easy surface preparation, uniform probe conjugation, and improvement in the limit of detection (LoD). We further compared two common surface functionalization strategies and showed that the developed microchip can achieve both high sensitivity for membrane protein profiling and low LoD for detection of sEV detection. At the optimum working condition, we demonstrated that the microchip could detect sEVs reaching an LoD of 104 sEVs/mL (when captured by membrane-sensing peptide (MSP) probes), which is among the lowest in the so far reported microchip-based methods.
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Affiliation(s)
- Moein Talebian Gevari
- Division
of Solid-State Electronics, Department of Electrical Engineering, Uppsala University, 75 121 Uppsala, Sweden
| | - Siddharth Sourabh Sahu
- Department
of Applied Physics, School of Engineering Sciences, KTH Royal Institute of Technology, 10 691 Stockholm, Sweden
| | - Fredrik Stridfeldt
- Department
of Applied Physics, School of Engineering Sciences, KTH Royal Institute of Technology, 10 691 Stockholm, Sweden
| | - Petra Hååg
- Department
of Oncology-Pathology, Karolinska Institutet, 171 64 Solna, Sweden
| | - Luigi De Petris
- Department
of Oncology-Pathology, Karolinska Institutet, 171 64 Solna, Sweden
- Theme
Cancer, Medical Unit Head and Neck, Lung, and Skin Tumors, Thoracic
Oncology Center, Karolinska University Hospital, 171 64 Solna, Sweden
| | - Kristina Viktorsson
- Department
of Oncology-Pathology, Karolinska Institutet, 171 64 Solna, Sweden
| | - Rolf Lewensohn
- Department
of Oncology-Pathology, Karolinska Institutet, 171 64 Solna, Sweden
- Theme
Cancer, Medical Unit Head and Neck, Lung, and Skin Tumors, Thoracic
Oncology Center, Karolinska University Hospital, 171 64 Solna, Sweden
| | - Alessandro Gori
- Consiglio
Nazionale delle Ricerche, Istituto di Scienze
e Tecnologie Chimiche “Giulio Natta” (SCITEC), 20131 Milan, Italy
| | - Marina Cretich
- Consiglio
Nazionale delle Ricerche, Istituto di Scienze
e Tecnologie Chimiche “Giulio Natta” (SCITEC), 20131 Milan, Italy
| | - Apurba Dev
- Division
of Solid-State Electronics, Department of Electrical Engineering, Uppsala University, 75 121 Uppsala, Sweden
- Department
of Applied Physics, School of Engineering Sciences, KTH Royal Institute of Technology, 10 691 Stockholm, Sweden
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Xu Z, Li L, Li J, Deng P. One-pot synthesis of ion-imprinted three-dimensional porous material based on graphene oxide for the selective adsorption of copper(II). JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART A, TOXIC/HAZARDOUS SUBSTANCES & ENVIRONMENTAL ENGINEERING 2023; 58:515-524. [PMID: 37032569 DOI: 10.1080/10934529.2023.2199650] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
Molecularly imprinted polymers (MIPs) are synthetic polymers with predetermined selectivity for a given analyte. One major problem associated with MIPs is the inaccessibility of a large fraction of the recognition sites that remain buried within the polymeric matrix. To address this problem, the high selectivity imparted by the imprinting technique and the porosity of three-dimensional (3D) graphene oxide (GO)-based porous materials were utilized in this work to prepare a 3D GO-based Cu(II)-ion-imprinted material (hereafter denoted as IIM) via one-pot reactions of GO, chitosan (CS), and glutaraldehyde in the presence of Cu(II). Results of equilibrium binding experiments show that IIM has a high template-ion binding capacity (1.75 mmol g-1) and good imprinting factor (2.19). Further, results of selectivity tests indicate that IIM has a high Cu(II)-recognition ability. IIM also has a fast binding rate and satisfactory reusability. In addition, the Langmuir isotherm model was well fitted with the experimental data, indicating the monolayer adsorption of Cu(II) ions. The present work provided a convenient approach to prepare 3D GO-based imprinted materials that are promising for enrichment or recycling of target compounds from wastewater.
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Affiliation(s)
- Zhifeng Xu
- College of Chemistry and Materials Science, Hengyang Normal University, Hengyang, PR China
- Key Laboratory of Organometallic New Materials of Hunan Province, Hengyang, PR China
- Engineering Research Center for Monitoring and Treatment of Heavy Metals Pollution in the Upper Reaches of Xiangjiang River, Hengyang, PR China
| | - Lizhen Li
- College of Chemistry and Materials Science, Hengyang Normal University, Hengyang, PR China
- Key Laboratory of Organometallic New Materials of Hunan Province, Hengyang, PR China
- Engineering Research Center for Monitoring and Treatment of Heavy Metals Pollution in the Upper Reaches of Xiangjiang River, Hengyang, PR China
| | - Junhua Li
- College of Chemistry and Materials Science, Hengyang Normal University, Hengyang, PR China
- Key Laboratory of Organometallic New Materials of Hunan Province, Hengyang, PR China
- Engineering Research Center for Monitoring and Treatment of Heavy Metals Pollution in the Upper Reaches of Xiangjiang River, Hengyang, PR China
| | - Peihong Deng
- College of Chemistry and Materials Science, Hengyang Normal University, Hengyang, PR China
- Key Laboratory of Organometallic New Materials of Hunan Province, Hengyang, PR China
- Engineering Research Center for Monitoring and Treatment of Heavy Metals Pollution in the Upper Reaches of Xiangjiang River, Hengyang, PR China
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Titanium Dioxide Nanotubes as Solid-Phase Extraction Adsorbent for the Determination of Copper in Natural Water Samples. MATERIALS 2022; 15:ma15030822. [PMID: 35160765 PMCID: PMC8836478 DOI: 10.3390/ma15030822] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/24/2021] [Revised: 01/11/2022] [Accepted: 01/17/2022] [Indexed: 12/28/2022]
Abstract
To increase the sensitivity of the analysis method of good copper sample preparation is essential. In this context, an analytical method was developed for sensitive determination of Cu (II) in environmental water samples by using TiO2 nanotubes as a solid-phase extraction absorbent (SPE). Factors affecting the extraction efficiency including the type, volume, concentration, and flow rate of the elution solvent, the mass of the adsorbent, and the volume, pH, and flow rate of the sample were evaluated and optimized. TiO2 nanotubes exhibited their good enrichment capacity for Cu (II) (~98%). Under optimal conditions, the method of the analysis showed good linearity in the range of 0–22 mg L−1 (R2 > 0.99), satisfactory repeatability (relative standard deviation: RSD was 3.16, n = 5), and a detection limit of about 32.5 ng mL−1. The proposed method was applied to real water samples, and the achieved recoveries were above 95%, showing minimal matrix effect and the robustness of the optimized SPE method.
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Qi H, Huang X, Wu J, Zhang J, Wang F, Qu H, Zheng L. A disposable aptasensor based on a gold-plated coplanar electrode array for on-site and real-time determination of Cu 2. Anal Chim Acta 2021; 1183:338991. [PMID: 34627507 DOI: 10.1016/j.aca.2021.338991] [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: 04/12/2021] [Revised: 08/05/2021] [Accepted: 08/07/2021] [Indexed: 11/25/2022]
Abstract
Copper ion (Cu2+) is an important cofactor for many enzymes in human body. Either excessive or deficient Cu2+ in the body may cause serious dysfunctions and diseases. So sensitive determination of Cu2+ in environmental samples is of more significance for evaluation and control of Cu2+ intake. Based on a low-cost gold-plated coplanar electrode array, a disposable aptasensor is developed with an ultra-sensitive indicator of interfacial capacitance. Modified with a specially isolated DNA aptamer for Cu2+, this sensor achieves a high selectivity of 1207: 1 against non-target ions. To realize real-time response, alternating-current electrothermal effect is integrated into the capacitance measuring process to efficiently enrich the trace Cu2+. This sensor reaches a limit of detection of 2.97 fM, with a linear range from 5.0 fM to 50 pM. The response time is only 15 s, which can meet the real-time detection requirement. On-site test of practical samples is also realized using the disposable sensor combined with a handheld inductance/capacitance/resistance meter. This sensor with its portable test system provides a cost-efficient solution for on-site, real-time and sensitive detection of Cu2+, showing great application value in environment monitoring.
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Affiliation(s)
- Haochen Qi
- College of Electrical and Electronic Engineering, Wenzhou University, Wenzhou, 325035, China; School of Electronic Science and Applied Physics, Hefei University of Technology, Hefei, 230009, China
| | - Xiaofan Huang
- School of Electronic Science and Applied Physics, Hefei University of Technology, Hefei, 230009, China
| | - Jayne Wu
- Department of Electrical Engineering and Computer Science, The University of Tennessee, Knoxville, TN, 37996, USA.
| | - Jian Zhang
- College of Electrical and Electronic Engineering, Wenzhou University, Wenzhou, 325035, China; School of Electronic Science and Applied Physics, Hefei University of Technology, Hefei, 230009, China.
| | - Fei Wang
- Beijing Smartchip Microelectronics Technology Company Limited, Beijing, 102200, China
| | - Hao Qu
- School of Food and Biological Engineering, Hefei University of Technology, Hefei, 230009, China
| | - Lei Zheng
- School of Food and Biological Engineering, Hefei University of Technology, Hefei, 230009, China.
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Zhang J, Fang X, Mao Y, Qi H, Wu J, Liu X, You F, Zhao W, Chen Y, Zheng L. Real-time, selective, and low-cost detection of trace level SARS-CoV-2 spike-protein for cold-chain food quarantine. NPJ Sci Food 2021; 5:12. [PMID: 34075052 PMCID: PMC8357935 DOI: 10.1038/s41538-021-00094-3] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2021] [Accepted: 04/06/2021] [Indexed: 02/08/2023] Open
Abstract
Due to the friendly temperature for virus survival, SARS-CoV-2 is frequently found in cold-chain foods, posing a serious threat to public health. Utilizing an interdigitated microelectrode chip modified with an antibody probe and integrating dielectrophoresis enrichment with interfacial capacitance sensing, a strategy is presented for the detection of trace level spike-protein from SARS-CoV-2. It achieves a limit of detection as low as 2.29 × 10-6 ng/mL in 20 s, with a wide linear range of 10-5-10-1 ng/mL and a selectivity of 234:1. The cost for a single test can be controlled to ~1 dollar. This strategy provides a competitive solution for real-time, sensitive, selective, and large-scale application in cold-chain food quarantine.
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Affiliation(s)
- Jian Zhang
- School of Electronic Science and Applied Physics, Hefei University of Technology, Hefei, China.,School of Food and Biological Engineering, Hefei University of Technology, Hefei, China
| | - Xin Fang
- School of Electronic Science and Applied Physics, Hefei University of Technology, Hefei, China
| | - Yu Mao
- School of Food and Biological Engineering, Hefei University of Technology, Hefei, China
| | - Haochen Qi
- School of Electronic Science and Applied Physics, Hefei University of Technology, Hefei, China.
| | - Jayne Wu
- Department of Electrical Engineering and Computer Science, The University of Tennessee, Knoxville, TN, USA.
| | - Xiaoru Liu
- School of Electronic Science and Applied Physics, Hefei University of Technology, Hefei, China
| | - Fangshuo You
- School of Electronic Science and Applied Physics, Hefei University of Technology, Hefei, China
| | - Wenci Zhao
- School of Electronic Science and Applied Physics, Hefei University of Technology, Hefei, China
| | - Ying Chen
- Agro-product Safety Research Centre, Chinese Academy of Inspection and Quarantine, Beijing, China
| | - Lei Zheng
- School of Food and Biological Engineering, Hefei University of Technology, Hefei, China.
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Daly R, Narayan T, Shao H, O’Riordan A, Lovera P. Platinum-Based Interdigitated Micro-Electrode Arrays for Reagent-Free Detection of Copper. SENSORS 2021; 21:s21103544. [PMID: 34069670 PMCID: PMC8161293 DOI: 10.3390/s21103544] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/01/2021] [Revised: 05/10/2021] [Accepted: 05/13/2021] [Indexed: 12/15/2022]
Abstract
Water is a precious resource that is under threat from a number of pressures, including, for example, release of toxic compounds, that can have damaging effect on ecology and human health. The current methods of water quality monitoring are based on sample collection and analysis at dedicated laboratories. Recently, electrochemical-based methods have attracted a lot of attention for environmental sensing owing to their versatility, sensitivity and their ease of integration with cost effective, smart and portable readout systems. In the present work, we report on the fabrication and characterization of platinum-based interdigitated microband electrodes arrays, and their application for trace detection of copper. Using square wave voltammetry after acidification with mineral acids, a limit of detection of 0.8 μg/L was achieved. Copper detection was also undertaken on river water samples and compared with standard analytical techniques. The possibility of controlling the pH at the surface of the sensors—thereby avoiding the necessity to add mineral acids—was investigated. By applying potentials to drive the water splitting reaction at one comb of the sensor’s electrode (the protonator), it was possible to lower the pH in the vicinity of the sensing electrode. Detection of standard copper solutions down to 5 μg/L (ppb) using this technique is reported. This reagent free method of detection opens the way for autonomous, in situ monitoring of pollutants in water bodies.
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An on-site, highly specific immunosensor for Escherichia coli detection in field milk samples from mastitis-affected dairy cattle. Biosens Bioelectron 2020; 165:112366. [DOI: 10.1016/j.bios.2020.112366] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2020] [Revised: 05/16/2020] [Accepted: 06/04/2020] [Indexed: 12/16/2022]
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8
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Lu Y, Yang Q, Wu J. Recent advances in biosensor-integrated enrichment methods for preconcentrating and detecting the low-abundant analytes in agriculture and food samples. Trends Analyt Chem 2020. [DOI: 10.1016/j.trac.2020.115914] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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