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The hot-wire concept: Towards a one-element thermal biosensor platform. Biosens Bioelectron 2021; 179:113043. [PMID: 33609951 DOI: 10.1016/j.bios.2021.113043] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2020] [Revised: 01/21/2021] [Accepted: 01/23/2021] [Indexed: 11/24/2022]
Abstract
In this work, the 3ω hot-wire concept is explored as a prospective biosensing platform with a single sensing element that can detect analytes based on a change in the thermal interface conductance. A uniform receptor layer such as single-stranded DNA is immobilized on a thin aluminium wire, which serves not only as an immobilization platform but also as a heating element and temperature sensor together. The wire is heated periodically with an alternating current (angular frequency ω) and the third harmonic (frequency 3ω) of the voltage across the wire renders the efficiency of heat transfer from the wire to the surrounding medium. The amplitude of the 3ω voltage depends sensitively on the composition and conformation of the biofunctional interface layer. We illustrate this with a model system that includes blank aluminium wires, wires with silanes bound covalently to the native surface oxide, and with single-, respectively double-stranded DNA tethered to the silanes. The difference in heat-transfer due to these coatings is significant and measurable not only in a liquid but also in air. Based on this proof-of-concept, various applications come in sight such as mutation analysis and analyte detection with aptamers or molecularly-imprinted polymers as receptors. Wire materials other than aluminium are possible as well and the concept is suitable for miniaturization and parallelization.
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2
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Poghossian A, Schöning MJ. Capacitive Field-Effect EIS Chemical Sensors and Biosensors: A Status Report. SENSORS 2020; 20:s20195639. [PMID: 33023133 PMCID: PMC7584023 DOI: 10.3390/s20195639] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/31/2020] [Revised: 09/21/2020] [Accepted: 09/29/2020] [Indexed: 02/07/2023]
Abstract
Electrolyte-insulator-semiconductor (EIS) field-effect sensors belong to a new generation of electronic chips for biochemical sensing, enabling a direct electronic readout. The review gives an overview on recent advances and current trends in the research and development of chemical sensors and biosensors based on the capacitive field-effect EIS structure—the simplest field-effect device, which represents a biochemically sensitive capacitor. Fundamental concepts, physicochemical phenomena underlying the transduction mechanism and application of capacitive EIS sensors for the detection of pH, ion concentrations, and enzymatic reactions, as well as the label-free detection of charged molecules (nucleic acids, proteins, and polyelectrolytes) and nanoparticles, are presented and discussed.
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Affiliation(s)
- Arshak Poghossian
- MicroNanoBio, Liebigstr. 4, 40479 Düsseldorf, Germany
- Correspondence: (A.P.); (M.J.S.)
| | - Michael J. Schöning
- Institute of Nano- and Biotechnologies (INB), FH Aachen, Campus Jülich, Heinrich-Mußmannstr. 1, 52428 Jülich, Germany
- Correspondence: (A.P.); (M.J.S.)
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3
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Chen D, Liang JT, Tong XY, Li HZ, Lai JX, Liu SB. A closed-loop detection system based on orthogonal phase locking for EISCAP sensor. J Electroanal Chem (Lausanne) 2020. [DOI: 10.1016/j.jelechem.2020.113925] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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4
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Murib MS, Martens D, Bienstman P. Label-free real-time optical monitoring of DNA hybridization using SiN Mach-Zehnder interferometer-based integrated biosensing platform. JOURNAL OF BIOMEDICAL OPTICS 2018; 23:1-7. [PMID: 30578628 DOI: 10.1117/1.jbo.23.12.127002] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/15/2018] [Accepted: 12/03/2018] [Indexed: 06/09/2023]
Abstract
We report on the label-free real-time optical monitoring of DNA hybridization upon exposure to a flow of complementary DNA at different concentrations. The biosensor is composed of a silicon nitride integrated unbalanced Mach-Zehnder interferometer (MZI), with an integrated arrayed waveguide grating as a spectral filter. This MZI has been shown to have both sufficient multiplexing capability and limit of detection on the order of 10 - 6 RIU. Probe DNA, consisting of a 36-mer fragment is covalently immobilized on the silicon nitride integrated biosensor. The wavelength shift is monitored upon complementary DNA targets being flown over the sensor. Concentrations of 1 pM can be easily detected. Also, an alternative route to modify the sensor surface with carboxylic groups using the photochemical reaction of fatty acids is proposed and preliminary XPS results are presented. Moreover, preliminary results for DNA obtained from a rolling circle amplification (RCA-DNA) process and spiked in a realistic amplification buffer are presented.
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Affiliation(s)
- Mohammed Sharif Murib
- Ghent University/Imec, Photonics Research Group, Ghent, Belgium
- Ghent University, Center for Nano- and Biophotonics (NB-Photonics), Ghent, Belgium
| | - Daan Martens
- Ghent University/Imec, Photonics Research Group, Ghent, Belgium
- Ghent University, Center for Nano- and Biophotonics (NB-Photonics), Ghent, Belgium
| | - Peter Bienstman
- Ghent University/Imec, Photonics Research Group, Ghent, Belgium
- Ghent University, Center for Nano- and Biophotonics (NB-Photonics), Ghent, Belgium
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5
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Abstract
As the future of health care diagnostics moves toward more portable and personalized techniques, there is immense potential to harness the power of electrical signals for biological sensing and diagnostic applications at the point of care. Electrical biochips can be used to both manipulate and sense biological entities, as they can have several inherent advantages, including on-chip sample preparation, label-free detection, reduced cost and complexity, decreased sample volumes, increased portability, and large-scale multiplexing. The advantages of fully integrated electrical biochip platforms are particularly attractive for point-of-care systems. This review summarizes these electrical lab-on-a-chip technologies and highlights opportunities to accelerate the transition from academic publications to commercial success.
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Affiliation(s)
- Bobby Reddy
- Department of Electrical and Computer Engineering,
- Micro and Nanotechnology Laboratory, University of Illinois at Urbana–Champaign, Urbana, Illinois 61801
| | - Eric Salm
- Department of Bioengineering, and
- Micro and Nanotechnology Laboratory, University of Illinois at Urbana–Champaign, Urbana, Illinois 61801
| | - Rashid Bashir
- Department of Electrical and Computer Engineering,
- Department of Bioengineering, and
- Micro and Nanotechnology Laboratory, University of Illinois at Urbana–Champaign, Urbana, Illinois 61801
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6
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Lin YT, Purwidyantri A, Luo JD, Chiou CC, Yang CM, Lo CH, Hwang TL, Yen TH, Lai CS. Programming a nonvolatile memory-like sensor for KRAS gene sensing and signal enhancement. Biosens Bioelectron 2015; 79:63-70. [PMID: 26700577 DOI: 10.1016/j.bios.2015.11.080] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2015] [Revised: 11/26/2015] [Accepted: 11/27/2015] [Indexed: 10/22/2022]
Abstract
A programmable field effect-based electrolyte-insulator-semiconductor (EIS) sensor constructed with a nonvolatile memory-like structure is proposed for KRAS gene DNA hybridization detection. This programmable EIS structure was fabricated with silicon oxide (SiO2)/silicon nitride (Si3N4)/silicon oxide on a p-type silicon wafer, namely electrolyte-oxide-nitride-oxide-Si (EONOS). In this research, voltage stress programming from 4 to 20V was applied to trigger holes confinement in the nitride-trapping layer that, consequently, enhances the DNA attachment onto the sensing surface due to additional electrostatic interaction. Not solely resulting from the higher DNA load, the programming may affect the orientation of the DNA that finally contributes to the change in capacitance. Findings have shown that a higher voltage program is able to increase the total capacitance and results in ~3.5- and ~5.5-times higher sensitivities for a series of concentrations for complementary DNA and wild type versus mutant DNA hybridization detection, respectively. Overall, it has been proven that the voltage program on the nonvolatile memory-like structure of EONOS is a notable candidate for genosensor development, scoping the diagnosis of a single nucleotide polymorphism (SNP)-related disease.
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Affiliation(s)
- Yi-Ting Lin
- Department of Electronic Engineering, Chang-Gung University, Taoyuan, Taiwan
| | | | - Ji-Dung Luo
- Department of Medical Biotechnology and Laboratory Science, Chang Gung University, Taoyuan, Taiwan
| | - Chiuan-Chian Chiou
- Department of Medical Biotechnology and Laboratory Science, Chang Gung University, Taoyuan, Taiwan
| | - Chia-Ming Yang
- Department of Electronic Engineering, Chang-Gung University, Taoyuan, Taiwan; Institute of Electro-Optical Engineering, Chang Gung University, Taoyuan, Taiwan; Biosensor Group, Biomedical Engineering Research Center, Chang Gung University, Taoyuan, Taiwan.
| | - Chih-Hong Lo
- Department of General Surgery, Chang Gung Memorial Hospital, Linkou, Taiwan
| | - Tsann-Long Hwang
- Department of General Surgery, Chang Gung Memorial Hospital, Linkou, Taiwan
| | - Tzung-Hai Yen
- Department of Nephrology and Division of Clinical Toxicology, Chang Gung Memorial Hospital, Linkou, Taiwan
| | - Chao-Sung Lai
- Department of Electronic Engineering, Chang-Gung University, Taoyuan, Taiwan; Department of General Surgery, Chang Gung Memorial Hospital, Linkou, Taiwan; Department of Materials Engineering, Ming-Chi University of Technology, New Taipei City 243, Taiwan.
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7
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Wu C, Bronder T, Poghossian A, Werner CF, Schöning MJ. Label-free detection of DNA using a light-addressable potentiometric sensor modified with a positively charged polyelectrolyte layer. NANOSCALE 2015; 7:6143-50. [PMID: 25771844 DOI: 10.1039/c4nr07225a] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
A multi-spot (16 spots) light-addressable potentiometric sensor (MLAPS) consisting of an Al-p-Si-SiO2 structure modified with a weak polyelectrolyte layer of PAH (poly(allylamine hydrochloride)) was applied for the label-free electrical detection of DNA (deoxyribonucleic acid) immobilization and hybridization by the intrinsic molecular charge for the first time. To achieve a preferentially flat orientation of DNA strands and thus, to reduce the distance between the DNA charge and MLAPS surface, the negatively charged probe single-stranded DNAs (ssDNA) were electrostatically adsorbed onto the positively charged PAH layer using a simple layer-by-layer (LbL) technique. In this way, more DNA charge can be positioned within the Debye length, yielding a higher sensor signal. The surface potential changes in each spot induced due to the surface modification steps (PAH adsorption, probe ssDNA immobilization, hybridization with complementary target DNA (cDNA), non-specific adsorption of mismatched ssDNA) were determined from the shifts of photocurrent-voltage curves along the voltage axis. A high sensor signal of 83 mV was registered after immobilization of probe ssDNA onto the PAH layer. The hybridization signal increases from 5 mV to 32 mV with increasing the concentration of cDNA from 0.1 nM to 5 μM. In contrast, a small signal of 5 mV was recorded in the case of non-specific adsorption of fully mismatched ssDNA (5 μM). The obtained results demonstrate the potential of the MLAPS in combination with the simple and rapid LbL immobilization technique as a promising platform for the future development of multi-spot light-addressable label-free DNA chips with direct electrical readout.
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Affiliation(s)
- Chunsheng Wu
- Institute of Nano- and Biotechnologies, FH Aachen, Campus Jülich, 52428 Jülich, Germany.
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8
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Siqueira JR, Molinnus D, Beging S, Schöning MJ. Incorporating a Hybrid Urease-Carbon Nanotubes Sensitive Nanofilm on Capacitive Field-Effect Sensors for Urea Detection. Anal Chem 2014; 86:5370-5. [DOI: 10.1021/ac500458s] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- José R. Siqueira
- Institute
of Exact Sciences, Naturals and Education, Federal University of Triângulo Mineiro (UFTM), 38064-200 Uberaba, Brazil
| | - Denise Molinnus
- Institute
of Nano- and Biotechnologies (INB), FH Aachen, Campus Jülich, 52428 Jülich, Germany
| | - Stefan Beging
- Institute
of Nano- and Biotechnologies (INB), FH Aachen, Campus Jülich, 52428 Jülich, Germany
| | - Michael J. Schöning
- Institute
of Nano- and Biotechnologies (INB), FH Aachen, Campus Jülich, 52428 Jülich, Germany
- Peter
Grünberg Institute (PGI-8), Forschungszentrum Jülich, 52425 Jülich, Germany
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9
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Shen YC, Yang CH, Chen SW, Wu SH, Yang TL, Huang JJ. IGZO thin film transistor biosensors functionalized with ZnO nanorods and antibodies. Biosens Bioelectron 2014; 54:306-10. [DOI: 10.1016/j.bios.2013.10.043] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2013] [Revised: 10/23/2013] [Accepted: 10/24/2013] [Indexed: 10/26/2022]
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10
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Branquinho R, Pinto JV, Busani T, Barquinha P, Pereira L, Baptista PV, Martins R, Fortunato E. Plastic Compatible Sputtered ${\hbox{Ta}}_{2}{\hbox{O}}_{5}$ Sensitive Layer for Oxide Semiconductor TFT Sensors. ACTA ACUST UNITED AC 2013. [DOI: 10.1109/jdt.2012.2229693] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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11
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Cherstvy A. Detection of DNA hybridization by field-effect DNA-based biosensors: mechanisms of signal generation and open questions. Biosens Bioelectron 2013; 46:162-70. [DOI: 10.1016/j.bios.2013.02.026] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2013] [Revised: 02/05/2013] [Accepted: 02/13/2013] [Indexed: 01/27/2023]
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12
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An ATP sensitive light addressable biosensor for extracellular monitoring of single taste receptor cell. Biomed Microdevices 2013; 14:1047-53. [PMID: 22955727 DOI: 10.1007/s10544-012-9702-3] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Adenosine triphosphate (ATP) is considered as the key neurotransmitter in taste buds for taste signal transmission and processing. Measurements of ATP secreted from single taste receptor cell (TRC) with high sensitivity and specificity are essential for investigating mechanisms underlying taste cell-to-cell communications. In this study, we presented an aptamer-based biosensor for the detection of ATP locally secreted from single TRC. ATP sensitive DNA aptamer was used as recognition element and its DNA competitor was served as signal transduction element that was covalently immobilized on the surface of light addressable potentiometric sensor (LAPS). Due to the light addressable capability of LAPS, local ATP secretion from single TRC can be detected by monitoring the working potential shifts of LAPS. The results show this biosensor can detect ATP with high sensitivity and specificity. It is demonstrated this biosensor can effectively detect the local ATP secretion from single TRC responding to tastant mixture. This biosensor could provide a promising new tool for the research of taste cell-to-cell communications as well as for the detection of local ATP secretion from other types of ATP secreting individual cells.
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13
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Credo GM, Su X, Wu K, Elibol OH, Liu DJ, Reddy B, Tsai TW, Dorvel BR, Daniels JS, Bashir R, Varma M. Label-free electrical detection of pyrophosphate generated from DNA polymerase reactions on field-effect devices. Analyst 2012; 137:1351-62. [PMID: 22262038 DOI: 10.1039/c2an15930a] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
We introduce a label-free approach for sensing polymerase reactions on deoxyribonucleic acid (DNA) using a chelator-modified silicon-on-insulator field-effect transistor (SOI-FET) that exhibits selective and reversible electrical response to pyrophosphate anions. The chemical modification of the sensor surface was designed to include rolling-circle amplification (RCA) DNA colonies for locally enhanced pyrophosphate (PPi) signal generation and sensors with immobilized chelators for capture and surface-sensitive detection of diffusible reaction by-products. While detecting arrays of enzymatic base incorporation reactions is typically accomplished using optical fluorescence or chemiluminescence techniques, our results suggest that it is possible to develop scalable and portable PPi-specific sensors and platforms for broad biomedical applications such as DNA sequencing and microbe detection using surface-sensitive electrical readout techniques.
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Affiliation(s)
- Grace M Credo
- Integrated Biosystems Lab, Intel Labs, Intel Corporation, 2200 Mission College Blvd., Santa Clara, CA 95054, USA.
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14
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Bavli D, Tkachev M, Piwonski H, Capua E, de Albuquerque I, Bensimon D, Haran G, Naaman R. Detection and quantification through a lipid membrane using the molecularly controlled semiconductor resistor. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:1020-8. [PMID: 22126281 DOI: 10.1021/la203502b] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
The detection of covalent and noncovalent binding events between molecules and biomembranes is a fundamental goal of contemporary biochemistry and analytical chemistry. Currently, such studies are performed routinely using fluorescence methods, surface-plasmon resonance spectroscopy, and electrochemical methods. However, there is still a need for novel sensitive miniaturizable detection methods where the sample does not have to be transferred to the sensor, but the sensor can be brought into contact with the sample studied. We present a novel approach for detection and quantification of processes occurring on the surface of a lipid bilayer membrane, by monitoring the current change through the n-type GaAs-based molecularly controlled semiconductor resistor (MOCSER), on which the membrane is adsorbed. Since GaAs is susceptible to etching in an aqueous environment, a protective thin film of methoxysilane was deposited on the device. The system was found to be sensitive enough to allow monitoring changes in pH and in the concentration of amino acids in aqueous solution on top of the membrane. When biotinylated lipids were incorporated into the membrane, it was possible to monitor the binding of streptavidin or avidin. The device modified with biotin-streptavidin complex was capable of detecting the binding of streptavidin antibodies to immobilized streptavidin with high sensitivity and selectivity. The response depends on the charge on the analyte. These results open the way to facile electrical detection of protein-membrane interactions.
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Affiliation(s)
- Danny Bavli
- Department of Chemical Physics, Weizmann Institute of Science, Rehovot, 76100, Israel
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15
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16
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Branquinho R, Veigas B, Pinto JV, Martins R, Fortunato E, Baptista PV. Real-time monitoring of PCR amplification of proto-oncogene c-MYC using a Ta₂O₅ electrolyte-insulator-semiconductor sensor. Biosens Bioelectron 2011; 28:44-9. [PMID: 21802276 DOI: 10.1016/j.bios.2011.06.039] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2011] [Accepted: 06/28/2011] [Indexed: 10/18/2022]
Abstract
We present a new approach for real-time monitoring of PCR amplification of a specific sequence from the human c-MYC proto-oncogene using a Ta(2)O(5) electrolyte-insulator-semiconductor (EIS) sensor. The response of the fabricated EIS sensor to cycle DNA amplification was evaluated and compared to standard SYBR-green fluorescence incorporation, showing it was possible to detect DNA concentration variations with 30 mV/μM sensitivity. The sensor's response was then optimized to follow in real-time the PCR amplification of c-MYC sequence from a genomic DNA sample attaining an amplification profile comparable to that of a standard real-time PCR. Owing to the small size, ease of fabrication and low-cost, the developed Ta(2)O(5) sensor may be incorporated onto a microfluidic device and then used for real-time PCR. Our approach may circumvent the practical and economical obstacles posed by current platforms that require an external fluorescence detector difficult to miniaturize and incorporate into a lab-on-chip system.
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Affiliation(s)
- Rita Branquinho
- CENIMAT/I3N, Departamento de Ciência dos Materiais, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa and CEMOP-UNINOVA, Campus de Caparica, 2829-516 Caparica, Portugal
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17
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An array of field-effect nanoplate SOI capacitors for (bio-)chemical sensing. Biosens Bioelectron 2011; 26:3023-8. [DOI: 10.1016/j.bios.2010.12.006] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2010] [Revised: 11/29/2010] [Accepted: 12/01/2010] [Indexed: 11/19/2022]
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18
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Lin TW, Kekuda D, Chu CW. Label-free detection of DNA using novel organic-based electrolyte-insulator-semiconductor. Biosens Bioelectron 2010; 25:2706-10. [PMID: 20483584 DOI: 10.1016/j.bios.2010.04.041] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2010] [Revised: 04/26/2010] [Accepted: 04/27/2010] [Indexed: 10/19/2022]
Abstract
In this study, we have constructed the first organic field effect sensor based on an electrolyte-insulator-semiconductor structure (OEIS) and applied this novel device to pH and DNA sensing. Variations in the insulator-electrolyte surface potential, which originate from either the change of the ionization states of the insulator surface groups or the binding of charged molecules to the insulator surface, modify the flat band voltage (V(FB)) of the OEIS sensor. The pH sensing experiments of OEIS sensor showed that the output signal linearly depended on pH solution in the range from pH 2 to pH 12, and an average sensitivity of 44.1 mV/pH was obtained. In the biosensing experiments, the absorption of positively charged poly-L-lysine on the insulator surface resulted in the reduction of the V(FB) value, whereas the subsequent binding of negatively charged single-stranded DNA probe (ssDNA) via electrostatic interaction increased the V(FB) value. Furthermore, the ssDNA-immobilized OEIS device was successfully used for the detection of DNA hybridization. The detection limit of complementary DNA was as low as 1 microM, and the output signal of OEIS biosensor linearly increased with the logarithm of complementary DNA concentration in the range from 5x10(-5) to 10(-7) M. The easy and inexpensive fabrication of the OEIS device allows to be served as a potentially disposable and sensitive biosensor.
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Affiliation(s)
- Tsung-Wu Lin
- Research Center for Applied Sciences, Academia Sinica, Nankang, Taipei, Taiwan
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19
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Siqueira JR, Caseli L, Crespilho FN, Zucolotto V, Oliveira ON. Immobilization of biomolecules on nanostructured films for biosensing. Biosens Bioelectron 2010; 25:1254-63. [DOI: 10.1016/j.bios.2009.09.043] [Citation(s) in RCA: 142] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2009] [Revised: 09/14/2009] [Accepted: 09/30/2009] [Indexed: 01/18/2023]
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20
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Zong XL, Wu CS, Wu XL, Lu YF, Wang P. A non-labeled DNA biosensor based on light addressable potentiometric sensor modified with TiO2 thin film. J Zhejiang Univ Sci B 2010; 10:860-6. [PMID: 19882762 DOI: 10.1631/jzus.b0920090] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Titanium dioxide (TiO(2)) thin film was deposited on the surface of the light addressable potentiometric sensor (LAPS) to modify the sensor surface for the non-labeled detection of DNA molecules. To evaluate the effect of ultraviolet (UV) treatment on the silanization level of TiO(2) thin film by 3-aminopropyltriethoxysilane (APTS), fluorescein isothiocyanate (FITC) was used to label the amine group on the end of APTS immobilized onto the TiO(2) thin film. We found that, with UV irradiation, the silanization level of the irradiated area of the TiO(2) film was improved compared with the non-irradiated area under well-controlled conditions. This result indicates that TiO(2) can act as a coating material on the biosensor surface to improve the effect and efficiency of the covalent immobilization of biomolecules on the sensor surface. The artificially synthesized probe DNA molecules were covalently linked onto the surface of TiO(2) film. The hybridization of probe DNA and target DNA was monitored by the recording of I-V curves that shift along the voltage axis during the process of reaction. A significant LAPS signal can be detected at 10 micromol/L of target DNA sample.
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Affiliation(s)
- Xiao-lin Zong
- Biosensor National Special Laboratory, Key Laboratory of Biomedical Engineering of Education Ministry, Department of Biomedical Engineering, Zhejiang University, Hangzhou 310027, China
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21
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Siqueira JR, Abouzar MH, Poghossian A, Zucolotto V, Oliveira ON, Schöning MJ. Penicillin biosensor based on a capacitive field-effect structure functionalized with a dendrimer/carbon nanotube multilayer. Biosens Bioelectron 2009; 25:497-501. [DOI: 10.1016/j.bios.2009.07.007] [Citation(s) in RCA: 68] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2009] [Revised: 06/23/2009] [Accepted: 07/13/2009] [Indexed: 10/20/2022]
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22
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Interfacing of biocomputing systems with silicon chips: Enzyme logic gates based on field-effect devices. ACTA ACUST UNITED AC 2009. [DOI: 10.1016/j.proche.2009.07.170] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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23
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Abouzar M, Ingebrandt S, Poghossian A, Zhang Y, Vu X, Moritz W, Schöning M. Nanoplate field-effect capacitive (bio-)chemical sensor array based on SOI structure. ACTA ACUST UNITED AC 2009. [DOI: 10.1016/j.proche.2009.07.167] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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24
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Abouzar M, Poghossian A, Razavi A, Williams O, Bijnens N, Wagner P, Schöning M. Characterisation of capacitive field-effect sensors with a nanocrystalline-diamond film as transducer material for multi-parameter sensing. Biosens Bioelectron 2009; 24:1298-304. [DOI: 10.1016/j.bios.2008.07.056] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2008] [Revised: 07/07/2008] [Accepted: 07/22/2008] [Indexed: 11/28/2022]
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25
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pH and ion sensitivity of a field-effect EIS (electrolyte-insulator-semiconductor) sensor covered with polyelectrolyte multilayers. J Solid State Electrochem 2008. [DOI: 10.1007/s10008-008-0589-0] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Poghossian A, Abouzar M, Schöning M. Capacitance–voltage and impedance characteristics of field-effect EIS sensors functionalised with polyelectrolyte multilayers. Ing Rech Biomed 2008. [DOI: 10.1016/j.rbmret.2007.11.018] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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