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Vogt S, Su Q, Gutiérrez-Sánchez C, Nöll G. Critical View on Electrochemical Impedance Spectroscopy Using the Ferri/Ferrocyanide Redox Couple at Gold Electrodes. Anal Chem 2016; 88:4383-90. [PMID: 26990929 DOI: 10.1021/acs.analchem.5b04814] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Electrochemical or faradaic impedance spectroscopy (EIS) using the ferri/ferrocyanide couple as a redox probe at gold working electrodes was evaluated with respect to its ability to monitor consecutive surface modification steps. As a model reaction, the reversible hybridization and dehybridization of DNA was studied. Thiol-modified single stranded DNA (ssDNA, 20 bases, capture probe) was chemisorbed to a gold electrode and treated with a solution of short thiols to release nonspecifically adsorbed DNA before hybridization with complementary ssDNA (20 bases, target) was carried out. Reversible dehybridization was achieved by intense rinsing with pure water. The experimental procedures were optimized by kinetic surface plasmon resonance (SPR) and quartz crystal microbalance with dissipation (QCM-D) measurements to maximize the increase in reflectivity or decrease in frequency upon hybridization before hybridization/dehybridization was also monitored by EIS. In contrast to SPR and QCM-D, repeatable EIS measurements were not possible at first. Combined SPR/EIS and QCM-D/EIS measurements revealed that during EIS the gold surface is seriously damaged due to the presence of CN(-) ions, which are released from the ferri/ferrocyanide redox probe. Even at optimized experimental conditions, etching the gold electrodes could not be completely suppressed and the repeatability of the EIS measurements was limited. In three out of four experimental runs, only two hybridization/dehybridization steps could be monitored reversibly by EIS. Thereafter etching the gold electrode significantly contributed to the EIS spectra whereas the QCM-D response was still repeatable. Hence great care has to be taken when this technique is used to monitor surface modification at gold electrodes.
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Affiliation(s)
- Stephan Vogt
- Nöll Junior Research Group, Organic Chemistry, Chemistry and Biology Department, Faculty IV, Siegen University , Adolf-Reichwein-Strasse 2, 57068 Siegen, Germany
| | - Qiang Su
- Nöll Junior Research Group, Organic Chemistry, Chemistry and Biology Department, Faculty IV, Siegen University , Adolf-Reichwein-Strasse 2, 57068 Siegen, Germany
| | - Cristina Gutiérrez-Sánchez
- Nöll Junior Research Group, Organic Chemistry, Chemistry and Biology Department, Faculty IV, Siegen University , Adolf-Reichwein-Strasse 2, 57068 Siegen, Germany
| | - Gilbert Nöll
- Nöll Junior Research Group, Organic Chemistry, Chemistry and Biology Department, Faculty IV, Siegen University , Adolf-Reichwein-Strasse 2, 57068 Siegen, Germany
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2
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Salama IE, Binks BP, Fletcher PD, Horsup DI. Adsorption of benzyldimethyldodecylammonium chloride onto stainless steel using the quartz crystal microbalance and the depletion methods: an optimisation study. Colloids Surf A Physicochem Eng Asp 2014. [DOI: 10.1016/j.colsurfa.2014.01.034] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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3
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Coulibaly FS, Youan BBC. Concanavalin A-polysaccharides binding affinity analysis using a quartz crystal microbalance. Biosens Bioelectron 2014; 59:404-11. [PMID: 24768820 DOI: 10.1016/j.bios.2014.03.040] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2014] [Revised: 03/12/2014] [Accepted: 03/20/2014] [Indexed: 02/07/2023]
Abstract
There is no comparative data available on the binding constants of Concanavalin A (Con A) and glycogen and Con A-mannan using quartz crystal microbalance (QCM), cost and time efficient system for biosensor analysis. It is hypothesized that a QCM can be used in its flow injection mode to monitor the binding affinity of polysaccharides to an immobilized lectin, Con A. The biosensor is prepared by immobilizing Con A on a 5MHz gold crystal by carbodiimide crosslinking chemistry. The attachment efficiency is monitored by Fourier Transform Infrared Spectroscopy. Equilibrium association and dissociation constants describing Con A-polysaccharides interaction are determined in a saturation binding experiment, where increasing concentrations of polysaccharides are run on a Con A-immobilized gold crystal surface, and the frequency shifts recorded on the frequency counter. The molecular weights (MW) of glycogen from Oyster and mannan from Saccharomyces cerevisiae are determined by size exclusion chromatography. The MW for glycogen and mannan are 604±0.002 kDa and 54±0.002 kDa, respectively. The equilibrium association and dissociation constants for Con A-glycogen and Con A-mannan interactions are KA=3.93±0.7×10(6) M(-1)/KD=0.25±0.06 μM and (n=3), respectively. Their respective frequency and motional resistance shifts relationship (ΔF/ΔR) are 37.29±1.55 and 34.86±0.85 Hz/Ω (n=3), which support the validity of Sauerbrey׳s rigidity approximation. This work suggests that Con A-mannan complex could be potentially utilized for insulin delivery and the targeting of glucose-rich substances and glycoproteins when fast drug release is desired.
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Affiliation(s)
- Fohona S Coulibaly
- Laboratory of Future Nanomedicines and Theoretical Chronopharmaceutics, Division of Pharmaceutical Sciences, School of Pharmacy, University of Missouri-Kansas City, 2464 Charlotte, Kansas City 64108, MO, USA.
| | - Bi-Botti C Youan
- Laboratory of Future Nanomedicines and Theoretical Chronopharmaceutics, Division of Pharmaceutical Sciences, School of Pharmacy, University of Missouri-Kansas City, 2464 Charlotte, Kansas City 64108, MO, USA.
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4
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Heydari S, Haghayegh GH. Application of Nanoparticles in Quartz Crystal Microbalance Biosensors. ACTA ACUST UNITED AC 2014. [DOI: 10.4236/jst.2014.42009] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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5
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Vandeventer PE, Lin JS, Zwang TJ, Nadim A, Johal MS, Niemz A. Multiphasic DNA adsorption to silica surfaces under varying buffer, pH, and ionic strength conditions. J Phys Chem B 2012; 116:5661-70. [PMID: 22537288 DOI: 10.1021/jp3017776] [Citation(s) in RCA: 73] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Reversible interactions between DNA and silica are utilized in the solid phase extraction and purification of DNA from complex samples. Chaotropic salts commonly drive DNA binding to silica but inhibit DNA polymerase amplification. We studied DNA adsorption to silica using conditions with or without chaotropic salts through bulk depletion and quartz crystal microbalance (QCM) experiments. While more DNA adsorbed to silica using chaotropic salts, certain buffer conditions without chaotropic salts yielded a similar amount of eluted DNA. QCM results indicate that under stronger adsorbing conditions the adsorbed DNA layer is initially rigid but becomes viscoelastic within minutes. These results qualitatively agreed with a mathematical model for a multiphasic adsorption process. Buffer conditions that do not require chaotropic salts can simplify protocols for nucleic acid sample preparation. Understanding how DNA adsorbs to silica can help optimize nucleic acid sample preparation for clinical diagnostic and research applications.
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Affiliation(s)
- Peter E Vandeventer
- Keck Graduate Institute of Applied Life Sciences , 535 Watson Drive, Claremont, California 91711, United States
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6
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Pomorska A, Shchukin D, Hammond R, Cooper MA, Grundmeier G, Johannsmann D. Positive Frequency Shifts Observed Upon Adsorbing Micron-Sized Solid Objects to a Quartz Crystal Microbalance from the Liquid Phase. Anal Chem 2010; 82:2237-42. [DOI: 10.1021/ac902012e] [Citation(s) in RCA: 113] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Agata Pomorska
- Institute of Technical and Macromolecular Chemistry, University of Paderborn, Warburger Str. 100, 33098 Paderborn, Germany, Max Planck Institute of Colloids and Interfaces, Am Mühlenberg 1, 14476 Potsdam-Golm, Germany, Cambridge Medical Innovations, 181 Cambridge Science Park, Cambridge CB4 0GJ, U.K., Institute for Molecular Bioscience, The University of Queensland, St. Lucia, Brisbane, 4072, Australia, and Institute of Physical Chemistry, Clausthal University of Technology, D-38678 Clausthal-Zellerfeld,
| | - Dmitry Shchukin
- Institute of Technical and Macromolecular Chemistry, University of Paderborn, Warburger Str. 100, 33098 Paderborn, Germany, Max Planck Institute of Colloids and Interfaces, Am Mühlenberg 1, 14476 Potsdam-Golm, Germany, Cambridge Medical Innovations, 181 Cambridge Science Park, Cambridge CB4 0GJ, U.K., Institute for Molecular Bioscience, The University of Queensland, St. Lucia, Brisbane, 4072, Australia, and Institute of Physical Chemistry, Clausthal University of Technology, D-38678 Clausthal-Zellerfeld,
| | - Richard Hammond
- Institute of Technical and Macromolecular Chemistry, University of Paderborn, Warburger Str. 100, 33098 Paderborn, Germany, Max Planck Institute of Colloids and Interfaces, Am Mühlenberg 1, 14476 Potsdam-Golm, Germany, Cambridge Medical Innovations, 181 Cambridge Science Park, Cambridge CB4 0GJ, U.K., Institute for Molecular Bioscience, The University of Queensland, St. Lucia, Brisbane, 4072, Australia, and Institute of Physical Chemistry, Clausthal University of Technology, D-38678 Clausthal-Zellerfeld,
| | - Matthew A. Cooper
- Institute of Technical and Macromolecular Chemistry, University of Paderborn, Warburger Str. 100, 33098 Paderborn, Germany, Max Planck Institute of Colloids and Interfaces, Am Mühlenberg 1, 14476 Potsdam-Golm, Germany, Cambridge Medical Innovations, 181 Cambridge Science Park, Cambridge CB4 0GJ, U.K., Institute for Molecular Bioscience, The University of Queensland, St. Lucia, Brisbane, 4072, Australia, and Institute of Physical Chemistry, Clausthal University of Technology, D-38678 Clausthal-Zellerfeld,
| | - Guido Grundmeier
- Institute of Technical and Macromolecular Chemistry, University of Paderborn, Warburger Str. 100, 33098 Paderborn, Germany, Max Planck Institute of Colloids and Interfaces, Am Mühlenberg 1, 14476 Potsdam-Golm, Germany, Cambridge Medical Innovations, 181 Cambridge Science Park, Cambridge CB4 0GJ, U.K., Institute for Molecular Bioscience, The University of Queensland, St. Lucia, Brisbane, 4072, Australia, and Institute of Physical Chemistry, Clausthal University of Technology, D-38678 Clausthal-Zellerfeld,
| | - Diethelm Johannsmann
- Institute of Technical and Macromolecular Chemistry, University of Paderborn, Warburger Str. 100, 33098 Paderborn, Germany, Max Planck Institute of Colloids and Interfaces, Am Mühlenberg 1, 14476 Potsdam-Golm, Germany, Cambridge Medical Innovations, 181 Cambridge Science Park, Cambridge CB4 0GJ, U.K., Institute for Molecular Bioscience, The University of Queensland, St. Lucia, Brisbane, 4072, Australia, and Institute of Physical Chemistry, Clausthal University of Technology, D-38678 Clausthal-Zellerfeld,
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Luo SC, Xie H, Chen N, Yu HH. Trinity DNA detection platform by ultrasmooth and functionalized PEDOT biointerfaces. ACS APPLIED MATERIALS & INTERFACES 2009; 1:1414-1419. [PMID: 20355943 DOI: 10.1021/am900117e] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
An oligonucleotide-grafted poly(3,4-ethylenedioxythiophene) (PEDOT) thin film is developed for three DNA biosensor detection methods, including fluorescence, quartz crystal microbalance, and electrochemical methods. By electrocopolymerization of hydroxyl-functionalized EDOT and carboxylic-functionalized EDOT in microemulsion solutions, ultrasmooth films with a controlled surface density of carboxylic groups are created. The probe oligonucleotides are immobilized on PEDOT thin films by using a N-hydroxysuccinimide and 1-ethyl-3-[3-(dimethylamino)propyl]carbodiimide hydrochloride coupling method. By monitoring the DNA hybridization efficiency on thin films with different oligonucleotide densities, the optimized density for DNA hybridization is obtained. The feasibility and limitation of using this platform for electrochemical detection are also discussed.
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Affiliation(s)
- Shyh-Chyang Luo
- Institute of Bioengineering and Nanotechnology, 31 Biopolis Way, The Nanos, Singapore 138669, Singapore
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8
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Ananthanawat C, Vilaivan T, Mekboonsonglarp W, Hoven VP. Thiolated pyrrolidinyl peptide nucleic acids for the detection of DNA hybridization using surface plasmon resonance. Biosens Bioelectron 2009; 24:3544-9. [PMID: 19515551 DOI: 10.1016/j.bios.2009.05.011] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2009] [Revised: 04/23/2009] [Accepted: 05/11/2009] [Indexed: 11/25/2022]
Abstract
Thiolated pyrrolidinyl peptide nucleic acids (HS-PNAs) bearing d-prolyl-2-aminocyclopentanecarboxylic acid (ACPC) backbones with different lengths and types of thiol modifiers were synthesized and then characterized by MALDI-TOF mass spectrometry. These HS-PNAs were immobilized on gold-coated glass by self-assembled monolayer (SAM) formation via S atom linkage for the detection of DNA hybridization using surface plasmon resonance (SPR). The amount and the stability of the immobilized HS-PNAs, as well as the effects of spacer and blocking thiol on DNA hybridization efficiency, were determined. SPR results indicated that the hybridization efficiency was enhanced when the distance between the PNA portion and the thiol terminal was increased and/or when blocking thiol was used following the HS-PNA immobilization. The immobilized HS-PNA could discriminate between fully complementary DNA from one or two base mismatched DNA with a relatively high degree of mismatch discrimination (>45%) in PBS buffer at 25 degrees C. The lowest DNA concentration at which reliable discrimination between fully complementary and single mismatched DNA could still occur was at about 0.2 microM, which is equivalent to 10 pmol of DNA. This research demonstrates that using these novel thiolated PNAs in combination with the SPR technique offers a direct, rapid and non-label based method that could potentially be applied for the analysis of genomic or PCR-amplified DNA in the future.
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Affiliation(s)
- Cheeraporn Ananthanawat
- Program of Macromolecular Science, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand
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9
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Xia H, Wang F, Huang Q, Huang J, Chen M, Wang J, Yao C, Chen Q, Cai G, Fu W. Detection of Staphylococcus epidermidis by a Quartz Crystal Microbalance Nucleic Acid Biosensor Array Using Au Nanoparticle Signal Amplification. SENSORS 2008; 8:6453-6470. [PMID: 27873880 PMCID: PMC3707461 DOI: 10.3390/s8106453] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/02/2008] [Revised: 10/03/2008] [Accepted: 10/17/2008] [Indexed: 11/16/2022]
Abstract
Staphylococcus epidermidis is a critical pathogen of nosocomial blood infections, resulting in significant morbidity and mortality. A piezoelectric quartz crystal microbalance (QCM) nucleic acid biosensor array using Au nanoparticle signal amplification was developed to rapidly detect S. epidermidis in clinical samples. The synthesized thiolated probes specific targeting S. epidermidis 16S rRNA gene were immobilized on the surface of QCM nucleic acid biosensor arrays. Hybridization was induced by exposing the immobilized probes to the PCR amplified fragments of S. epidermidis, resulting in a mass change and a consequent frequency shift of the QCM biosensor. To further enhance frequency shift results from above described hybridizations, streptavidin coated Au nanoparticles were conjugated to the PCR amplified fragments. The results showed that the lowest detection limit of current QCM system was 1.3×103 CFU/mL. A linear correlation was found when the concentration of S. epidermidis varied from 1.3×103 to 1.3×107 CFU/mL. In addition, 55 clinical samples were detected with both current QCM biosensor system and conventional clinical microbiological method, and the sensitivity and specificity of current QCM biosensor system were 97.14% and 100%, respectively. In conclusion, the current QCM system is a rapid, low-cost and sensitive method that can be used to identify infection of S. epidermidis in clinical samples.
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Affiliation(s)
- Han Xia
- Department of Laboratory Medicine, Southwest Hospital, Third Military Medical University, Chongqing 400038, P.R China.
| | - Feng Wang
- Department of Laboratory Medicine, Southwest Hospital, Third Military Medical University, Chongqing 400038, P.R China.
| | - Qing Huang
- Department of Laboratory Medicine, Southwest Hospital, Third Military Medical University, Chongqing 400038, P.R China.
| | - Junfu Huang
- Department of Laboratory Medicine, Southwest Hospital, Third Military Medical University, Chongqing 400038, P.R China.
| | - Ming Chen
- Department of Laboratory Medicine, Southwest Hospital, Third Military Medical University, Chongqing 400038, P.R China.
| | - Jue Wang
- Department of Laboratory Medicine, Southwest Hospital, Third Military Medical University, Chongqing 400038, P.R China.
| | - Chunyan Yao
- Department of Laboratory Medicine, Southwest Hospital, Third Military Medical University, Chongqing 400038, P.R China.
| | - Qinghai Chen
- Department of Laboratory Medicine, Southwest Hospital, Third Military Medical University, Chongqing 400038, P.R China.
| | - Guoru Cai
- The 26th Research Institute, Chinese Electronic Scientific and Technical Group Company, Chongqing 400060, P.R China.
| | - Weiling Fu
- Department of Laboratory Medicine, Southwest Hospital, Third Military Medical University, Chongqing 400038, P.R China.
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10
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Peeters S, Stakenborg T, Reekmans G, Laureyn W, Lagae L, Van Aerschot A, Van Ranst M. Impact of spacers on the hybridization efficiency of mixed self-assembled DNA/alkanethiol films. Biosens Bioelectron 2008; 24:72-7. [DOI: 10.1016/j.bios.2008.03.012] [Citation(s) in RCA: 62] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2007] [Revised: 02/26/2008] [Accepted: 03/17/2008] [Indexed: 11/28/2022]
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11
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Gole A, Jana NR, Selvan ST, Ying JY. Langmuir-Blodgett thin films of quantum dots: synthesis, surface modification, and fluorescence resonance energy transfer (FRET) studies. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2008; 24:8181-8186. [PMID: 18590286 DOI: 10.1021/la8000224] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
We describe herein studies on as-prepared hydrophobic ZnS-CdSe quantum dots (QDs) at the air-water interface. Surface pressure-area (pi-A) isotherms have been used to study the monolayer behavior. Uniform, lamellar multilayer thin films of QDs were deposited by the Langmuir-Blodgett (LB) technique. The role of two different surfactant systems commonly employed in the synthesis of these QDs (trioctylphosphine oxide-octadecylamine (TOPO-ODA) system and trioctylphosphine oxide-tetradecylphosphonic acid (TOPO-TDPA) system) on the monolayer behavior and the quality of thin films produced has been investigated. The thin films were characterized by quartz crystal microgravimetry (QCM), contact angle measurements, fluorescence spectroscopy, and transmission electron microscopy (TEM). These QD films were further modified by an amphiphilic polymer, poly(maleic anhydride-alt-1-tetradecene) (PMA). The hydrophobic interaction between the polymers and the surfactants attached to the QDs drove the self-assembly process. The carboxylic acid functional groups in the polymer were also used to immobilize avidin. We have demonstrated a proof of concept for the biosensing strategy wherein the avidin-coated QD films attracted biotinylated gold nanoparticles, resulting in fluorescence resonance energy transfer (FRET) quenching of the thin films.
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Affiliation(s)
- Anand Gole
- Institute of Bioengineering and Nanotechnology, 31 Biopolis Way, The Nanos, Singapore 138669
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12
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A facile route to stabilize SERS-marker molecules on μAg particles: Layer-by-layer deposition of polyelectrolytes. Colloids Surf A Physicochem Eng Asp 2008. [DOI: 10.1016/j.colsurfa.2007.08.011] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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13
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Mehta M, Hanumanthaiah CS, Betala PA, Zhang H, Roh S, Buttner W, Penrose WR, Stetter JR, Pérez-Luna VH. Detection of proteins and bacteria using an array of feedback capacitance sensors. Biosens Bioelectron 2007; 23:728-34. [PMID: 17888647 DOI: 10.1016/j.bios.2007.08.011] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2007] [Revised: 08/13/2007] [Accepted: 08/14/2007] [Indexed: 11/29/2022]
Abstract
An integrated array of micron-dimension capacitors, originally developed for biometric applications (fingerprint identification), was engineered for detection of biological agents such as proteins and bacteria. This device consists of an array of 93,184 (256 x 364) individual capacitor-based sensing elements located underneath a thin (0.8 microm) layer of glass. This glass layer can be functionalized with organosilane-based monolayers to provide groups amenable for the immobilization of bioreceptors such as antibodies, enzymes, peptides, aptamers, and nucleotides. Upon functionalization with antibodies and in conjunction with signal amplification schemes that result in perturbation of the dielectric constant around the captured antigens, this system can be used as a detector of biological agents. Two signal amplification schemes were tested in this work: one consisted of 4 microm diameter latex immunobeads and a second one was based on colloidal gold catalyzed reduction of silver. These signal amplification approaches were demonstrated and show that this system is capable of specific detection of bacteria (Escherichia coli) and proteins (ovalbumin). The present work shows proof-of-principle demonstration that a simple fingerprint detector based on feedback capacitance measurements can be implemented as a biosensor. The approach presented could be easily expanded to simultaneously test for a large number of analytes and multiple samples given that this device has a large number of detectors. The device and required instrumentation is highly portable and does not require expensive and bulky instrumentation because it relies purely on electronic detection.
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Affiliation(s)
- Manav Mehta
- Department of Chemical and Environmental Engineering, Illinois Institute of Technology, Chicago, IL 60616, USA
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14
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Arinaga K, Rant U, Knezević J, Pringsheim E, Tornow M, Fujita S, Abstreiter G, Yokoyama N. Controlling the surface density of DNA on gold by electrically induced desorption. Biosens Bioelectron 2007; 23:326-31. [PMID: 17560778 DOI: 10.1016/j.bios.2007.04.012] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2007] [Revised: 03/25/2007] [Accepted: 04/24/2007] [Indexed: 11/22/2022]
Abstract
We report on a method to control the packing density of sulfur-bound oligonucleotide layers on metal electrodes by electrical means. In a first step, a dense nucleic acid layer is deposited by self-assembly from solution; in a second step, defined fractions of DNA molecules are released from the surface by applying a series of negative voltage cycles. Systematic investigations of the influence of the applied electrode potentials and oligonucleotide length allow us to identify a sharp desorption onset at -0.65 V versus Ag/AgCl, which is independent of the DNA length. Moreover, our results clearly show the pronounced influence of competitive adsorbents in solution on the desorption behavior, which can prevent the re-adsorption of released DNA molecules, thereby enhancing the desorption efficiency. The method is fully bio-compatible and can be employed to improve the functionality of DNA layers. This is demonstrated in hybridization experiments revealing almost perfect yields for electrically "diluted" DNA layers. The proposed control method is extremely beneficial to the field of DNA-based sensors.
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Affiliation(s)
- Kenji Arinaga
- Fujitsu Laboratories Ltd., 10-1 Morinosato-Wakamiya, Atsugi 243-0197, Japan.
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15
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Cooper MA, Singleton VT. A survey of the 2001 to 2005 quartz crystal microbalance biosensor literature: applications of acoustic physics to the analysis of biomolecular interactions. J Mol Recognit 2007; 20:154-84. [PMID: 17582799 DOI: 10.1002/jmr.826] [Citation(s) in RCA: 294] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
The widespread exploitation of biosensors in the analysis of molecular recognition has its origins in the mid-1990s following the release of commercial systems based on surface plasmon resonance (SPR). More recently, platforms based on piezoelectric acoustic sensors (principally 'bulk acoustic wave' (BAW), 'thickness shear mode' (TSM) sensors or 'quartz crystal microbalances' (QCM)), have been released that are driving the publication of a large number of papers analysing binding specificities, affinities, kinetics and conformational changes associated with a molecular recognition event. This article highlights salient theoretical and practical aspects of the technologies that underpin acoustic analysis, then reviews exemplary papers in key application areas involving small molecular weight ligands, carbohydrates, proteins, nucleic acids, viruses, bacteria, cells and lipidic and polymeric interfaces. Key differentiators between optical and acoustic sensing modalities are also reviewed.
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Affiliation(s)
- Matthew A Cooper
- Akubio Ltd., 181 Cambridge Science Park, Cambridge, United Kingdom, UK.
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Koev ST, Powers MA, Yi H, Wu LQ, Bentley WE, Rubloff GW, Payne GF, Ghodssi R. Mechano-transduction of DNA hybridization and dopamine oxidation through electrodeposited chitosan network. LAB ON A CHIP 2007; 7:103-11. [PMID: 17180212 DOI: 10.1039/b609149k] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
While microcantilevers offer exciting opportunities for mechano-detection, they often suffer from limitations in either sensitivity or selectivity. To address these limitations, we electrodeposited a chitosan film onto a cantilever surface and mechano-transduced detection events through the chitosan network. Our first demonstration was the detection of nucleic acid hybridization. In this instance, we electrodeposited the chitosan film onto the cantilever, biofunctionalized the film with oligonucleotide probe, and detected target DNA hybridization by cantilever bending in solution (static mode) or resonant frequency shifts in air (dynamic mode). In both detection modes, we observed a two-order of magnitude increase in sensitivity compared to values reported in literature for DNA immobilized on self-assembled monolayers. In our second demonstration, we coupled electrochemical and mechanical modes to selectively detect the neurotransmitter dopamine. A chitosan-coated cantilever was biased to electrochemically oxidize dopamine solution. Dopamine's oxidation products react with the chitosan film and create a tensile stress of approximately 1.7 MPa, causing substantial cantilever bending. A control experiment was performed with ascorbic acid solution. It was shown that the electrochemical oxidation of ascorbic acid does not lead to reactions with chitosan and does not change cantilever bending. These results suggest that chitosan can confer increased sensitivity and selectivity to microcantilever sensors.
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Affiliation(s)
- Stephan T Koev
- Department of Electrical and Computer Engineering, University of Maryland, College Park, MD 20742, USA
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17
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Kinetic and affinity analyses of hybridization reactions between peptide nucleic acid probes and DNA targets using surface plasmon field-enhanced fluorescence spectroscopy. Biointerphases 2006; 1:113-22. [DOI: 10.1116/1.2365386] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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18
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Lebed K, Kulik AJ, Forró L, Lekka M. Lectin–carbohydrate affinity measured using a quartz crystal microbalance. J Colloid Interface Sci 2006; 299:41-8. [PMID: 16529761 DOI: 10.1016/j.jcis.2006.01.053] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2005] [Revised: 01/26/2006] [Accepted: 01/27/2006] [Indexed: 11/23/2022]
Abstract
The association of two molecules is described by two parameters, association equilibrium and association rate constants, which are characteristic for a given type of interaction. Usually, they are determined for interacting molecules dissolved in solution. However, for many applications one type of molecules is immobilized on a substrate, which may influence the binding kinetics. The studied complex of concanavalin A and carboxypeptidase Y belongs to the lectin-carbohydrate type of interaction involving the recognition of oligosaccharide moieties. The concanavalin A was immobilized on a gold electrode of quartz crystal, while carboxypeptidase Y was added to a buffer (Tris-buffered saline). The constants describing the association of the investigated molecules were determined on the basis of measurements performed using a quartz crystal microbalance in liquid. The obtained values were (0.59+/-0.01)x10(6) M(-1) for the association equilibrium constant and (5.6+/-0.1)x10(4) M(-1)s(-1) for the association rate constant. The saturation binding experiment gave another value of the association constant, (2.7+/-0.02)x10(6) M(-1). The comparison of obtained values with previously published ones verifies that the molecule orientation and binding site accessibility for specific ligands could influence the association equilibrium constant value. The presented measurements demonstrate the ability of a quartz crystal microbalance to detect and to evaluate the association process occurring between molecules.
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Affiliation(s)
- Kateryna Lebed
- The Henryk Niewodniczański Institute of Nuclear Physics, Polish Academy of Sciences, Radzikowskiego 152, 31-342 Kraków, Poland.
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Kim K, Park HK, Kim NH. Silver-particle-based surface-enhanced Raman scattering spectroscopy for biomolecular sensing and recognition. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2006; 22:3421-7. [PMID: 16548610 DOI: 10.1021/la052912q] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
In this study, we demonstrate that 2-microm-sized Ag (microAg) powders can be used as a core material for constructing molecular sensing/recognition units operating via surface-enhanced Raman scattering (SERS). This is possible because microAg powders are very efficient substrates for both the infrared and Raman-spectroscopic characterization of molecular adsorbates prepared in a similar manner on silver surfaces; we can obtain an infrared spectrum of organic molecules adsorbed on microAg particles with a very high signal-to-noise ratio by diffuse reflectance infrared Fourier transform spectroscopy (DRIFT), and the Raman spectrum of organic monolayers on powdered silver is an SERS spectrum. The agglomeration of microAg particles in a highly concentrated buffer solution could be prevented by the layer-by-layer deposition of cationic and anionic polyelectrolytes such as poly(allylamine hydrochloride) (PAH) and poly(acrylic acid) (PAA). In fact, prior to depositing PAA and PAH, 4-aminobenzenethiol (4-ABT) was assembled on the surfaces of the microAg particles as SERS markers. Because of the presence of amine groups of 4-ABT, PAA could be readily deposited on the microAg particles. On the other hand, the outermost PAA layer could also be derivatized with biotin-derivatized poly(L-lysine). The nonspecific interaction of poly(L-lysine) with proteins could be suppressed by grafting poly(ethylene glycol) into the biotin-derivatized poly(L-lysine) molecules. On the basis of the nature of the SERS peaks of 4-ABT, it was confirmed that these biotinylated microAg powders were effective in selectively recognizing the streptavidin arrays. Because a number of different molecules can be used as SERS-marker molecules, such as probable 4-ABT, commercially available microAg powders must be a prospective material in molecular sensing/recognition, particularly via SERS.
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Affiliation(s)
- Kwan Kim
- Laboratory of Intelligent Interfaces, School of Chemistry, Seoul National University, Seoul 151-742, Korea.
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Goual L, Horváth-Szabó G, Masliyah JH, Xu Z. Adsorption of bituminous components at oil/water interfaces investigated by quartz crystal microbalance: implications to the stability of water-in-oil emulsions. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2005; 21:8278-89. [PMID: 16114932 DOI: 10.1021/la050333f] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
Silica-gel-coated QCM crystals oscillating in a thickness shear mode are used to measure adsorption of bituminous components in water-saturated heptol (1/1 vol ratio of a heptane/toluene mixture) at the oil/water interface. In addition to the viscoelasticity of the adsorbed film, the effects of the bulk liquid density and viscosity as well as the liquid trapped in interfacial cavities are taken into account for the calculation of adsorbed mass. Asphaltenes in heptol adsorb continuously at the oil/water interface, while resins (the surface-active species in maltenes) show adsorption saturation in the same solvent. For Athabasca bitumen in heptol, two adsorption regimes are observed depending on concentration. At low concentrations, a slow, non-steady-state, and irreversible adsorption takes place. At high concentrations, a steady-state adsorption with limited reversibility results in a quick adsorption saturation. The threshold concentration between these adsorption regimes is 1.5 wt % and 8 wt % for oil/water and oil/gold interfaces, respectively. The threshold concentration, the total adsorbed amount, and the flux of non-steady-state adsorption depend on the resin-to-asphaltene ratio. The threshold concentration is related to the earlier reported critical bitumen concentration characterizing the rigid-to-flexible transition of the interfacial film. We propose a new mechanism based on the change of the effective resin-to-asphaltene ratio with dilution to explain both the adsorption behavior and emulsion stability.
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Affiliation(s)
- Lamia Goual
- Department of Chemical and Materials Engineering, University of Alberta, Edmonton AB T6G 2G6, Canada
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Mo Z, Wang H, Liang Y, Liu F, Xue Y. Highly reproducible hybridization assay of zeptomole DNA based on adsorption of nanoparticle-bioconjugate. Analyst 2005; 130:1589-94. [PMID: 16284656 DOI: 10.1039/b500949a] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A nanoparticle-bioconjugate was formed by homogeneous hybridization of one polynucleotide target with two oligonucleotide probes labelled by thiol and a nanoparticle, respectively. Deposition of the nanoparticle-bioconjugate on a gold surface by thiol-gold reaction was monitored in situ by quartz crystal microbalance (QCM) and applied for flow analysis of zeptomole amounts of polynucleotide. The formation in solution and adsorption of thiolated conjugates on gold could be fast, uniform and effective, and has been successfully exploited to construct a highly reproducible and sensitive platform for detection of target sequences. Being more rapid, reproducible, sensitive and amenable to automation than previously reported microgravimetric hybridization assays, this technology has great promise for practical applications in molecular diagnostics.
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Affiliation(s)
- Zhihong Mo
- College of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, People's Republic of China.
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