101
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Ayan B, Ozcelik A, Bachman H, Tang SY, Xie Y, Wu M, Li P, Huang TJ. Acoustofluidic coating of particles and cells. LAB ON A CHIP 2016; 16:4366-4372. [PMID: 27754503 PMCID: PMC5465870 DOI: 10.1039/c6lc00951d] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
On-chip microparticle and cell coating technologies enable a myriad of applications in chemistry, engineering, and medicine. Current microfluidic coating technologies often rely on magnetic labeling and concurrent deflection of particles across laminar streams of chemicals. Herein, we introduce an acoustofluidic approach for microparticle and cell coating by implementing tilted-angle standing surface acoustic waves (taSSAWs) into microchannels with multiple inlets. The primary acoustic radiation force generated by the taSSAW field was exploited in order to migrate the particles across the microchannel through multiple laminar streams, which contained the buffer and coating chemicals. We demonstrate effective coating of polystyrene microparticles and HeLa cells without the need for magnetic labelling. We characterized the coated particles and HeLa cells with fluorescence microscopy and scanning electron microscopy. Our acoustofluidic-based particle and cell coating method is label-free, biocompatible, and simple. It can be useful in the on-chip manufacturing of many functional particles and cells.
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Affiliation(s)
- Bugra Ayan
- Department of Engineering Science and Mechanics, The Pennsylvania State University, University Park, PA 16802, USA
| | - Adem Ozcelik
- Department of Mechanical Engineering and Materials Science, Duke University, Durham, NC 27708, USA.
| | - Hunter Bachman
- Department of Mechanical Engineering and Materials Science, Duke University, Durham, NC 27708, USA.
| | - Shi-Yang Tang
- Department of Engineering Science and Mechanics, The Pennsylvania State University, University Park, PA 16802, USA
| | - Yuliang Xie
- Department of Engineering Science and Mechanics, The Pennsylvania State University, University Park, PA 16802, USA
| | - Mengxi Wu
- Department of Mechanical Engineering and Materials Science, Duke University, Durham, NC 27708, USA.
| | - Peng Li
- Department of Engineering Science and Mechanics, The Pennsylvania State University, University Park, PA 16802, USA
| | - Tony Jun Huang
- Department of Engineering Science and Mechanics, The Pennsylvania State University, University Park, PA 16802, USA and Department of Mechanical Engineering and Materials Science, Duke University, Durham, NC 27708, USA.
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102
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Microchip-based ultrafast serodiagnostic assay for tuberculosis. Sci Rep 2016; 6:35845. [PMID: 27775039 PMCID: PMC5075771 DOI: 10.1038/srep35845] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2016] [Accepted: 09/26/2016] [Indexed: 12/02/2022] Open
Abstract
Access to point-of-care (POC), rapid, inexpensive, sensitive, and instrument-free tests for the diagnosis of tuberculosis (TB) remains a major challenge. Here, we report a simple and low-cost microchip-based TB ELISA (MTBE) platform for the detection of anti-mycobacterial IgG in plasma samples in less than 15 minutes. The MTBE employs a flow-less, magnet-actuated, bead-based ELISA for simultaneous detection of IgG responses against multiple mycobacterial antigens. Anti-trehalose 6,6′-dimycolate (TDM) IgG responses were the strongest predictor for differentiating active tuberculosis (ATB) from healthy controls (HC) and latent tuberculosis infections (LTBI). The TDM-based MTBE demonstrated superior sensitivity compared to sputum microscopy (72% vs. 56%) with 80% and 63% positivity among smear-positive and smear-negative confirmed ATB samples, respectively. Receiver operating characteristic analysis indicated good accuracy for differentiating ATB from HC (AUC = 0.77). Thus, TDM-based MTBE can be potentially used as a screening device for rapid diagnosis of active TB at the POC.
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103
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Cheng R, Zhu L, Huang W, Mao L, Zhao Y. Dynamic scaling of ferromagnetic micro-rod clusters under a weak magnetic field. SOFT MATTER 2016; 12:8440-8447. [PMID: 27714351 DOI: 10.1039/c6sm01485b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
A controlled configurational change of micro-clusters in suspensions is essential for many smart material applications. In this paper, the dynamic process of ferromagnetic microrod clusters (FMRCs) under an external magnetic field was studied as a function of the cluster size N and the applied field B. The FMRCs rearranged from a side-by-side raft-like structure to an end-to-end chain-like structure, originating from coupled motions through the field-driven alignment of both ferromagnetic microrods and FMRCs. A theoretical model based on an extension of a zig-zag chain was developed, and both the cluster length and orientation could be characterized by a retardation time constant τ, with a relationship τ ∼ N2/B, which agrees well with the experimental results, τ ∼ N2.2±0.2/B0.8±0.1. Such a model can be used to predict other cluster dynamics or the magneto-elastic behavior of other soft matters consisting of FMRCs.
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Affiliation(s)
- Rui Cheng
- College of Engineering, University of Georgia, Athens, Georgia 30602, USA.
| | - Lu Zhu
- College of Engineering, University of Georgia, Athens, Georgia 30602, USA.
| | - Weijie Huang
- Department of Physics and Astronomy, University of Georgia, Athens, Georgia 30602, USA.
| | - Leidong Mao
- College of Engineering, University of Georgia, Athens, Georgia 30602, USA.
| | - Yiping Zhao
- Department of Physics and Astronomy, University of Georgia, Athens, Georgia 30602, USA.
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104
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Zirath H, Peham JR, Schnetz G, Coll A, Brandhoff L, Spittler A, Vellekoop MJ, Redl H. A compact and integrated immunoassay with on-chip dispensing and magnetic particle handling. Biomed Microdevices 2016; 18:16. [PMID: 26842948 DOI: 10.1007/s10544-016-0045-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
We present a compact diagnostic platform for a rapid and sensitive detection of plasma biomarkers. The platform consists of a disposable microfluidic polymer chip, a processing device including a lens-free and cost efficient sensor system and a setup for dispersion of magnetic particles. The biomarkers of interest are quantified by magnetic bead based immunoassays with chemiluminescent readout technology. With a novel system for dispersion and manipulation of the magnetic particles in combination with chemiluminescence detection, the sensitivity of the immunoassay is improved and enables a rapid assay in a microfluidic format. In the disposable chip, extra chambers for storage and dispensing of biomarker specific reagents are integrated, which reduce the need of external dosing devices and thereby the cost of the platform is decreased. Plasma biomarkers for monitoring of sepsis could be quantified at 10 pg/mL concentrations within a total time of 30 min by the present system. This contribution is a fundamental step towards the development of an automatic and compact Point-of-Care testing device for monitoring of patients at the intensive care unit.
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Affiliation(s)
- Helene Zirath
- Molecular Diagnostics, Health and Environment Department, Austrian Institute of Technology, Muthgasse 11/2, Vienna, Austria. .,Ludwig Boltzmann Institute for Experimental and Clinical Traumatology at AUVA Research Center, Vienna, Austria.
| | - Johannes R Peham
- Molecular Diagnostics, Health and Environment Department, Austrian Institute of Technology, Muthgasse 11/2, Vienna, Austria
| | | | - Albert Coll
- Ludwig Boltzmann Institute for Experimental and Clinical Traumatology at AUVA Research Center, Vienna, Austria
| | - Lukas Brandhoff
- Inst. for Microsensors, -Actuators, & -Syst. (IMSAS/MCB), University of Bremen, Bremen, Germany
| | - Andreas Spittler
- Surgical Research Laboratories and Core Facility Flow Cytometry, Medical University of Vienna, Vienna, Austria
| | - Michael J Vellekoop
- Inst. for Microsensors, -Actuators, & -Syst. (IMSAS/MCB), University of Bremen, Bremen, Germany
| | - Heinz Redl
- Ludwig Boltzmann Institute for Experimental and Clinical Traumatology at AUVA Research Center, Vienna, Austria
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105
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Boroun S, Larachi F. Prospects of Magnetic Nanoparticles for Magnetic Field-Assisted Mixing of Fluids with Relevance to Chemical Engineering. ALTERNATIVE ENERGY SOURCES FOR GREEN CHEMISTRY 2016. [DOI: 10.1039/9781782623632-00198] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
Utilization of efficient, safe and controllable alternative energization approaches towards green and sustainable processes is vigorously explored in the field of process intensification. In this contribution, magnetic fields are specifically discussed and possible mechanisms to exploit this form of energy excitation for fluid-phase mixing in confined spaces are introduced. Magnetic nanofluids are par excellence the most suitable media for transmission of magnetic energy into a target fluid. In addition, their benign nature makes them suitable candidates for biological applications in microfluidics. The interaction of magnetic fluids with magnetic fields, as governed by the equations of motion in ferrohydrodynamics, can generate different mechanisms for fluidic actuations. These mechanisms are mainly the result of the type of magnetic field enabled, e.g., non-uniform static, oscillating or rotating magnetic fields, their strength or the magnetization of polar fluids, in addition to the momentum exchange induced between the rotating magnetic nanoparticles and the carrier fluid in rotating magnetic fields. With an emphasis on applications in microfluidic devices, the review of recent advances in the present contribution shows how such a variety of magnetic fields can be taken advantage of to mix fluids. Mixing in electrically conducting fluids in the framework of magnetohydrodynamics, as another class of magnetic field-assisted mixing is also another subject of this review. This latter category benefits from the absence of magnetic nanoparticles but on the other hand requires complex structuring of mixing devices as imposed by indispensable and appropriate interactions between electric and magnetic fields. The reviewed research findings in this category show how the generation of complex fluid motions is attainable specifically in micron-sized conduits.
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Affiliation(s)
- Shahab Boroun
- Department of Chemical Engineering, Laval University Québec QC Canada G1V0A6
| | - Faïçal Larachi
- Department of Chemical Engineering, Laval University Québec QC Canada G1V0A6
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106
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Spontaneous formation of spiral-like patterns with distinct periodic physical properties by confined electrodeposition of Co-In disks. Sci Rep 2016; 6:30398. [PMID: 27462025 PMCID: PMC4961954 DOI: 10.1038/srep30398] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2016] [Accepted: 06/27/2016] [Indexed: 11/09/2022] Open
Abstract
Spatio-temporal patterns are ubiquitous in different areas of materials science and biological systems. However, typically the motifs in these types of systems present a random distribution with many possible different structures. Herein, we demonstrate that controlled spatio-temporal patterns, with reproducible spiral-like shapes, can be obtained by electrodeposition of Co-In alloys inside a confined circular geometry (i.e., in disks that are commensurate with the typical size of the spatio-temporal features). These patterns are mainly of compositional nature, i.e., with virtually no topographic features. Interestingly, the local changes in composition lead to a periodic modulation of the physical (electric, magnetic and mechanical) properties. Namely, the Co-rich areas show higher saturation magnetization and electrical conductivity and are mechanically harder than the In-rich ones. Thus, this work reveals that confined electrodeposition of this binary system constitutes an effective procedure to attain template-free magnetic, electric and mechanical surface patterning with specific and reproducible shapes.
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107
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Cappelli S, de Jong AM, Baudry J, Prins MWJ. Interfacial rheometry of polymer at a water-oil interface by intra-pair magnetophoresis. SOFT MATTER 2016; 12:5551-5562. [PMID: 27253322 DOI: 10.1039/c5sm02917a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
We describe an interfacial rheometry technique based on pairs of micrometer-sized magnetic particles at a fluid-fluid interface. The particles are repeatedly attracted and repelled by well-controlled magnetic dipole-dipole forces, so-called interfacial rheometry by intra-pair magnetophoresis (IPM). From the forces (∼pN), displacements (∼μm) and velocities (∼μm s(-1)) of the particles we are able to quantify the interfacial drag coefficient of particles within a few seconds and over very long timescales. The use of local dipole-dipole forces makes the system insensitive to fluid flow and suited for simultaneously recording many particles in parallel over a long period of time. We apply IPM to study the time-dependent adsorption of an oil-soluble amino-modified silicone polymer at a water-oil interface using carboxylated magnetic particles. At low polymer concentration the carboxylated particles remain on the water side of the water-oil interface, while at high polymer concentrations the particles transit into the oil phase. Both conditions show a drag coefficient that does not depend on time. However, at intermediate polymer concentrations data show an increase of the interfacial drag coefficient as a function of time, with an increase over more than three orders of magnitude (10(-7) to 10(-4) N s m(-1)), pointing to a strong polymer-polymer interaction at the interface. The time-dependence of the interfacial drag appears to be highly sensitive to the polymer concentration and to the ionic strength of the aqueous phase. We foresee that IPM will be a very convenient technique to study fluid-fluid interfaces for a broad range of materials systems.
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Affiliation(s)
- Stefano Cappelli
- Department of Applied Physics, Eindhoven University of Technology, Eindhoven, The Netherlands
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108
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Sharma J, Ishizawa S, Yukino R, Takamura T, Hanyu N, Yasuno H, Handa H, Sandhu A. Fast and sensitive medical diagnostic protocol based on integrating circular current lines for magnetic washing and optical detection of fluorescent magnetic nanobeads. SENSING AND BIO-SENSING RESEARCH 2016. [DOI: 10.1016/j.sbsr.2016.05.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
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109
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110
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Towards a Multifunctional Electrochemical Sensing and Niosome Generation Lab-on-Chip Platform Based on a Plug-and-Play Concept. SENSORS 2016; 16:s16060778. [PMID: 27240377 PMCID: PMC4934204 DOI: 10.3390/s16060778] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/21/2016] [Revised: 05/13/2016] [Accepted: 05/23/2016] [Indexed: 11/27/2022]
Abstract
In this paper, we present a new modular lab on a chip design for multimodal neurotransmitter (NT) sensing and niosome generation based on a plug-and-play concept. This architecture is a first step toward an automated platform for an automated modulation of neurotransmitter concentration to understand and/or treat neurodegenerative diseases. A modular approach has been adopted in order to handle measurement or drug delivery or both measurement and drug delivery simultaneously. The system is composed of three fully independent modules: three-channel peristaltic micropumping system, a three-channel potentiostat and a multi-unit microfluidic system composed of pseudo-Y and cross-shape channels containing a miniature electrode array. The system was wirelessly controlled by a computer interface. The system is compact, with all the microfluidic and sensing components packaged in a 5 cm × 4 cm × 4 cm box. Applied to serotonin, a linear calibration curve down to 0.125 mM, with a limit of detection of 31 μM was collected at unfunctionalized electrodes. Added sensitivity and selectivity was achieved by incorporating functionalized electrodes for dopamine sensing. Electrode functionalization was achieved with gold nanoparticles and using DNA and o-phenylene diamine polymer. The as-configured platform is demonstrated as a central component toward an “intelligent” drug delivery system based on a feedback loop to monitor drug delivery.
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111
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Mosley O, Melling L, Tarn MD, Kemp C, Esfahani MMN, Pamme N, Shaw KJ. Sample introduction interface for on-chip nucleic acid-based analysis of Helicobacter pylori from stool samples. LAB ON A CHIP 2016; 16:2108-15. [PMID: 27164181 DOI: 10.1039/c6lc00228e] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
Despite recent advances in microfluidic-based integrated diagnostic systems, the sample introduction interface, especially with regards to large volume samples, has often been neglected. We present a sample introduction interface that allows direct on-chip processing of crude stool samples for the detection of Helicobacter pylori (H. pylori). The principle of IFAST (immiscible filtration assisted by surface tension) was adapted to include a large volume sample chamber with a septum-based interface for stool sample introduction. Solid chaotropic salt and dry superparamagnetic particles (PMPs) could be stored on-chip and reconstituted upon sample addition, simplifying the process of release of DNA from H. pylori cells and its binding to the PMPs. Finally, the PMPs were pulled via a magnet through a washing chamber containing an immiscible oil solution and into an elution chamber where the DNA was released into aqueous media for subsequent analysis. The entire process required only 7 min while enabling a 40-fold reduction in working volume from crude biological samples. The combination of a real-world interface and rapid DNA extraction offers the potential for the methodology to be used in point-of-care (POC) devices.
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Affiliation(s)
- O Mosley
- Faculty of Science and Engineering, Manchester Metropolitan University, Chester Street, Manchester, M1 5GD, UK.
| | - L Melling
- Faculty of Science and Engineering, Manchester Metropolitan University, Chester Street, Manchester, M1 5GD, UK.
| | - M D Tarn
- Department of Chemistry, University of Hull, Cottingham Road, Hull, HU6 7RX, UK.
| | - C Kemp
- Department of Chemistry, University of Hull, Cottingham Road, Hull, HU6 7RX, UK.
| | - M M N Esfahani
- School of Engineering, University of Hull, Cottingham Road, Hull, HU6 7RX, UK
| | - N Pamme
- Department of Chemistry, University of Hull, Cottingham Road, Hull, HU6 7RX, UK.
| | - K J Shaw
- Faculty of Science and Engineering, Manchester Metropolitan University, Chester Street, Manchester, M1 5GD, UK.
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112
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High-throughput screening approaches and combinatorial development of biomaterials using microfluidics. Acta Biomater 2016; 34:1-20. [PMID: 26361719 DOI: 10.1016/j.actbio.2015.09.009] [Citation(s) in RCA: 65] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2015] [Revised: 09/07/2015] [Accepted: 09/08/2015] [Indexed: 12/11/2022]
Abstract
From the first microfluidic devices used for analysis of single metabolic by-products to highly complex multicompartmental co-culture organ-on-chip platforms, efforts of many multidisciplinary teams around the world have been invested in overcoming the limitations of conventional research methods in the biomedical field. Close spatial and temporal control over fluids and physical parameters, integration of sensors for direct read-out as well as the possibility to increase throughput of screening through parallelization, multiplexing and automation are some of the advantages of microfluidic over conventional, 2D tissue culture in vitro systems. Moreover, small volumes and relatively small cell numbers used in experimental set-ups involving microfluidics, can potentially decrease research cost. On the other hand, these small volumes and numbers of cells also mean that many of the conventional molecular biology or biochemistry assays cannot be directly applied to experiments that are performed in microfluidic platforms. Development of different types of assays and evidence that such assays are indeed a suitable alternative to conventional ones is a step that needs to be taken in order to have microfluidics-based platforms fully adopted in biomedical research. In this review, rather than providing a comprehensive overview of the literature on microfluidics, we aim to discuss developments in the field of microfluidics that can aid advancement of biomedical research, with emphasis on the field of biomaterials. Three important topics will be discussed, being: screening, in particular high-throughput and combinatorial screening; mimicking of natural microenvironment ranging from 3D hydrogel-based cellular niches to organ-on-chip devices; and production of biomaterials with closely controlled properties. While important technical aspects of various platforms will be discussed, the focus is mainly on their applications, including the state-of-the-art, future perspectives and challenges. STATEMENT OF SIGNIFICANCE Microfluidics, being a technology characterized by the engineered manipulation of fluids at the submillimeter scale, offers some interesting tools that can advance biomedical research and development. Screening platforms based on microfluidic technologies that allow high-throughput and combinatorial screening may lead to breakthrough discoveries not only in basic research but also relevant to clinical application. This is further strengthened by the fact that reliability of such screens may improve, since microfluidic systems allow close mimicking of physiological conditions. Finally, microfluidic systems are also very promising as micro factories of a new generation of natural or synthetic biomaterials and constructs, with finely controlled properties.
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113
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Visser EWA, van IJzendoorn LJ, Prins MWJ. Particle Motion Analysis Reveals Nanoscale Bond Characteristics and Enhances Dynamic Range for Biosensing. ACS NANO 2016; 10:3093-101. [PMID: 26913834 DOI: 10.1021/acsnano.5b07021] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
Biofunctionalized colloidal particles are widely used as labels in bioanalytical assays, lab-on-chip devices, biophysical research, and in studies on live biological systems. With detection resolution going down to the level of single particles and single molecules, understanding the nature of the interaction of the particles with surfaces and substrates becomes of paramount importance. Here, we present a comprehensive study of motion patterns of colloidal particles maintained in close proximity to a substrate by short molecular tethers (40 nm). The motion of the particles (500-1000 nm) was optically tracked with a very high localization accuracy (below 3 nm). A surprisingly large variation in motion patterns was observed, which can be attributed to properties of the particle-molecule-substrate system, namely the bond number, the nature of the bond, particle protrusions, and substrate nonuniformities. Experimentally observed motion patterns were compared to numerical Monte Carlo simulations, revealing a close correspondence between the observed motion patterns and properties of the molecular system. Particles bound via single tethers show distinct disc-, ring-, and bell-shaped motion patterns, where the ring- and bell-shaped patterns are caused by protrusions on the particle in the direct vicinity of the molecular attachment point. Double and triple tethered particles exhibit stripe-shaped and triangular-shaped motion patterns, respectively. The developed motion pattern analysis allows for discrimination between particles bound by different bond types, which opens the possibility to improve the limit of detection and the dynamic range of bioanalytical assays, with a projected increase of dynamic range by nearly 2 orders of magnitude.
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Affiliation(s)
- Emiel W A Visser
- Department of Applied Physics, Eindhoven University of Technology (TU/e) , Eindhoven 5600 MB, The Netherlands
- Institute for Complex Molecular Systems (ICMS), Eindhoven University of Technology (TU/e) , Eindhoven 5600 MB, The Netherlands
| | - Leo J van IJzendoorn
- Department of Applied Physics, Eindhoven University of Technology (TU/e) , Eindhoven 5600 MB, The Netherlands
- Institute for Complex Molecular Systems (ICMS), Eindhoven University of Technology (TU/e) , Eindhoven 5600 MB, The Netherlands
| | - Menno W J Prins
- Department of Applied Physics, Eindhoven University of Technology (TU/e) , Eindhoven 5600 MB, The Netherlands
- Institute for Complex Molecular Systems (ICMS), Eindhoven University of Technology (TU/e) , Eindhoven 5600 MB, The Netherlands
- Department of Biomedical Engineering, Eindhoven University of Technology (TU/e) , Eindhoven 5600 MB, The Netherlands
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114
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Peró-Gascón R, Pont L, Benavente F, Barbosa J, Sanz-Nebot V. Analysis of serum transthyretin by on-line immunoaffinity solid-phase extraction capillary electrophoresis mass spectrometry using magnetic beads. Electrophoresis 2016; 37:1220-31. [DOI: 10.1002/elps.201500495] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2015] [Revised: 01/12/2016] [Accepted: 01/21/2016] [Indexed: 12/31/2022]
Affiliation(s)
- Roger Peró-Gascón
- Department of Analytical Chemistry; University of Barcelona; Barcelona Spain
| | - Laura Pont
- Department of Analytical Chemistry; University of Barcelona; Barcelona Spain
| | - Fernando Benavente
- Department of Analytical Chemistry; University of Barcelona; Barcelona Spain
| | - José Barbosa
- Department of Analytical Chemistry; University of Barcelona; Barcelona Spain
| | - Victoria Sanz-Nebot
- Department of Analytical Chemistry; University of Barcelona; Barcelona Spain
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115
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Cui FR, Wang J, Opal SM, Tripathi A. Isolating Influenza RNA from Clinical Samples Using Microfluidic Oil-Water Interfaces. PLoS One 2016; 11:e0149522. [PMID: 26886007 PMCID: PMC4757531 DOI: 10.1371/journal.pone.0149522] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2015] [Accepted: 02/02/2016] [Indexed: 11/21/2022] Open
Abstract
The effective and robust separation of biomolecules of interest from patient samples is an essential step in diagnostic applications. We present a platform for the fast extraction of nucleic acids from clinical specimens utilizing paramagnetic PMPs, an oil-water interface, a small permanent magnet and a microfluidic channel to separate and purify captured nucleic acids from lysate in less than one minute, circumventing the need for multiple washing steps and greatly simplifying and expediting the purification procedure. Our device was able to isolate influenza RNA from clinical nasopharyngeal swab samples with high efficiency when compared to the Ambion® MagMAXTM Viral RNA Isolation Kit, sufficiently separating nucleic acid analytes from PCR-inhibiting contaminants within the lysate while also critically maintaining high integrity of the viral genome. We find that this design has great potential for rapid, efficient and sensitive nucleic acid separation from patient sample.
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Affiliation(s)
- Francis R. Cui
- Center for Biomedical Engineering, School of Engineering, Brown University, Providence, Rhode Island, United States of America
| | - Jingjing Wang
- Center for Biomedical Engineering, School of Engineering, Brown University, Providence, Rhode Island, United States of America
| | - Steven M. Opal
- Warren Alpert Medical School, Brown University, Providence, Rhode Island, United States of America
- Memorial Hospital of Rhode Island, Pawtucket, Rhode Island, United States of America
| | - Anubhav Tripathi
- Center for Biomedical Engineering, School of Engineering, Brown University, Providence, Rhode Island, United States of America
- * E-mail:
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116
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Seong Y, Kang TG, Hulsen MA, den Toonder JMJ, Anderson PD. Magnetic interaction of Janus magnetic particles suspended in a viscous fluid. Phys Rev E 2016; 93:022607. [PMID: 26986377 DOI: 10.1103/physreve.93.022607] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2015] [Indexed: 06/05/2023]
Abstract
We studied the magnetic interaction between circular Janus magnetic particles suspended in a Newtonian fluid under the influence of an externally applied uniform magnetic field. The particles are equally compartmentalized into paramagnetic and nonmagnetic sides. A direct numerical scheme is employed to solve the magnetic particulate flow in the Stokes flow regime. Upon applying the magnetic field, contrary to isotropic paramagnetic particles, a single Janus particle can rotate due to the magnetic torque created by the magnetic anisotropy of the particle. In a two-particle problem, the orientation of each particle is found to be an additional factor that affects the critical angle separating the nature of magnetic interaction. Using multiparticle problems, we show that the orientation of the particles has a significant influence on the dynamics of the particles, the fluid flow induced by the actuated particles, and the final conformation of the particles. Straight and staggered chain structures observed experimentally can be reproduced numerically in a multiple particle problem.
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Affiliation(s)
- Yujin Seong
- School of Aerospace and Mechanical Engineering, Korea Aerospace University, Goyang-si, Gyeonggi-do 412-792, Republic of Korea
| | - Tae Gon Kang
- School of Aerospace and Mechanical Engineering, Korea Aerospace University, Goyang-si, Gyeonggi-do 412-792, Republic of Korea
| | - Martien A Hulsen
- Department of Mechanical Engineering, Eindhoven University of Technology, P. O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - Jaap M J den Toonder
- Department of Mechanical Engineering, Eindhoven University of Technology, P. O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - Patrick D Anderson
- Department of Mechanical Engineering, Eindhoven University of Technology, P. O. Box 513, 5600 MB Eindhoven, The Netherlands
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117
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Active colloids: Progress and challenges towards realising autonomous applications. Curr Opin Colloid Interface Sci 2016. [DOI: 10.1016/j.cocis.2015.10.003] [Citation(s) in RCA: 131] [Impact Index Per Article: 16.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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118
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Lafleur JP, Jönsson A, Senkbeil S, Kutter JP. Recent advances in lab-on-a-chip for biosensing applications. Biosens Bioelectron 2016; 76:213-33. [DOI: 10.1016/j.bios.2015.08.003] [Citation(s) in RCA: 126] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2015] [Revised: 07/31/2015] [Accepted: 08/03/2015] [Indexed: 12/15/2022]
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119
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van Vliembergen RWL, van IJzendoorn LJ, Prins MWJ. Distance within colloidal dimers probed by rotation-induced oscillations of scattered light. OPTICS EXPRESS 2016; 24:A123-38. [PMID: 26832566 DOI: 10.1364/oe.24.00a123] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Aggregation processes of colloidal particles are of broad scientific and technological relevance. The earliest stage of aggregation, when dimers appear in an ensemble of single particles, is very important to characterize because it opens routes for further aggregation processes. Furthermore, it represents the most sensitive phase of diagnostic aggregation assays. Here, we characterize dimers by rotating them in a magnetic field and by recording the angle dependence of light scattering. At small scattering angles, the scattering cross section can be approximated by the total cross-sectional area of the dimer. In contrast, at scattering angles around 90 degrees, we reveal that the dependence of the scattering cross section on the dimer angle shows a series of peaks per single 2π rotation of the dimers. These characteristics originate from optical interactions between the two particles, as we have verified with two-particle Mie scattering simulations. We have studied in detail the angular positions of the peaks. It appears from simulations that the influence of particle size polydispersity, Brownian rotation and refractive index on the angular positions of the peaks is relatively small. However, the angular positions of the peaks strongly depend on the distance between the particles. We find a good correspondence between measured data and calculations for a gap of 180 nm between particles having a diameter of 1 micrometer. The experiment and simulations pave the way for extracting distance-specific data from ensembles of dimerizing colloidal particles, with application for sensitive diagnostic aggregation assays.
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120
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Novo P, Dell'Aica M, Janasek D, Zahedi RP. High spatial and temporal resolution cell manipulation techniques in microchannels. Analyst 2016; 141:1888-905. [DOI: 10.1039/c6an00027d] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Reviewing latest developments on lab on chips for enhanced control of cells’ experiments.
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Affiliation(s)
- Pedro Novo
- Protein Dynamics Group
- Leibniz-Institut für Analytische Wissenschaften – ISAS - e.V
- 44227 Dortmund
- Germany
| | - Margherita Dell'Aica
- Protein Dynamics Group
- Leibniz-Institut für Analytische Wissenschaften – ISAS - e.V
- 44227 Dortmund
- Germany
| | - Dirk Janasek
- Protein Dynamics Group
- Leibniz-Institut für Analytische Wissenschaften – ISAS - e.V
- 44227 Dortmund
- Germany
| | - René P. Zahedi
- Protein Dynamics Group
- Leibniz-Institut für Analytische Wissenschaften – ISAS - e.V
- 44227 Dortmund
- Germany
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121
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Yu H, Nguyen TB, Ng SH, Tran T. Mixing control by frequency variable magnetic micropillar. RSC Adv 2016. [DOI: 10.1039/c5ra24996a] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
We demonstrate an active mixing enhancement method based on actuation of a single magnetic micropillar with variable beating frequency.
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Affiliation(s)
- Hao Yu
- School of Mechanical & Aerospace Engineering
- Nanyang Technological University
- Singapore
| | - Thien-Binh Nguyen
- School of Mechanical & Aerospace Engineering
- Nanyang Technological University
- Singapore
- Singapore Institute of Manufacturing Technology
- Singapore
| | - Sum Huan Ng
- Singapore Institute of Manufacturing Technology
- Singapore
| | - Tuan Tran
- School of Mechanical & Aerospace Engineering
- Nanyang Technological University
- Singapore
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122
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Manipulation of Superparamagnetic Beads on Patterned Exchange-Bias Layer Systems for Biosensing Applications. SENSORS 2015; 15:28854-88. [PMID: 26580625 PMCID: PMC4701312 DOI: 10.3390/s151128854] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/07/2015] [Revised: 10/30/2015] [Accepted: 11/09/2015] [Indexed: 12/17/2022]
Abstract
A technology platform based on a remotely controlled and stepwise transport of an array arrangement of superparamagnetic beads (SPB) for efficient molecular uptake, delivery and accumulation in the context of highly specific and sensitive analyte molecule detection for the application in lab-on-a-chip devices is presented. The near-surface transport of SPBs is realized via the dynamic transformation of the SPBs’ magnetic potential energy landscape above a magnetically stripe patterned Exchange-Bias (EB) thin film layer systems due to the application of sub-mT external magnetic field pulses. In this concept, the SPB velocity is dramatically influenced by the magnitude and gradient of the magnetic field landscape (MFL) above the magnetically stripe patterned EB substrate, the SPB to substrate distance, the magnetic properties of both the SPBs and the EB layer system, respectively, as well as by the properties of the external magnetic field pulses and the surrounding fluid. The focus of this review is laid on the specific MFL design in EB layer systems via light-ion bombardment induced magnetic patterning (IBMP). A numerical approach is introduced for the theoretical description of the MFL in comparison to experimental characterization via scanning Hall probe microscopy. The SPB transport mechanism will be outlined in terms of the dynamic interplay between the EB substrate’s MFL and the pulse scheme of the external magnetic field.
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123
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Ngo HT, Wang HN, Fales AM, Vo-Dinh T. Plasmonic SERS biosensing nanochips for DNA detection. Anal Bioanal Chem 2015; 408:1773-81. [DOI: 10.1007/s00216-015-9121-4] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2015] [Revised: 10/08/2015] [Accepted: 10/14/2015] [Indexed: 12/12/2022]
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124
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Affiliation(s)
| | - Tae-Hyun Shin
- Department of Chemistry, Yonsei University , Seoul, 120-749, Korea
| | - Jinwoo Cheon
- Department of Chemistry, Yonsei University , Seoul, 120-749, Korea
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125
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Cornaglia M, Trouillon R, Tekin HC, Lehnert T, Gijs MAM. Dose-response curve of a microfluidic magnetic bead-based surface coverage sandwich assay. N Biotechnol 2015; 32:433-40. [PMID: 25817550 DOI: 10.1016/j.nbt.2015.03.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2014] [Revised: 02/19/2015] [Accepted: 03/13/2015] [Indexed: 10/23/2022]
Abstract
Magnetic micro- and nanoparticles ('magnetic beads') have been used to advantage in many microfluidic devices for sensitive antigen (Ag) detection. Today, assays that use as read-out of the signal the number count of immobilized beads on a surface for quantification of a sample's analyte concentration have been among the most sensitive and have allowed protein detection lower than the fgmL(-1) concentration range. Recently, we have proposed in this category a magnetic bead surface coverage assay (Tekin et al., 2013 [1]), in which 'large' (2.8μm) antibody (Ab)-functionalized magnetic beads captured their Ag from a serum and these Ag-carrying beads were subsequently exposed to a surface pattern of fixed 'small' (1.0μm) Ab-coated magnetic beads. When the system was exposed to a magnetic induction field, the magnet dipole attractive interactions between the two bead types were used as a handle to approach both bead surfaces and assist with Ag-Ab immunocomplex formation, while unspecific binding (in absence of an Ag) of a large bead was reduced by exploiting viscous drag flow. The dose-response curve of this type of assay had two remarkable features: (i) its ability to detect an output signal (i.e. bead number count) for very low Ag concentrations, and (ii) an output signal of the assay that was non-linear with respect to Ag concentration. We explain here the observed dose-response curves and show that the type of interactions and the concept of our assay are in favour of detecting the lowest analyte concentrations (where typically either zero or one Ag is carried per large bead), while higher concentrations are less efficiently detected. We propose a random walk process for the Ag-carrying bead over the magnetic landscape of small beads and this model description explains the enhanced overall capture probability of this assay and its particular non-linear dose response curves.
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Affiliation(s)
- Matteo Cornaglia
- Laboratory of Microsystems, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland
| | - Raphaël Trouillon
- Laboratory of Microsystems, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland
| | - H Cumhur Tekin
- Laboratory of Microsystems, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland
| | - Thomas Lehnert
- Laboratory of Microsystems, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland
| | - Martin A M Gijs
- Laboratory of Microsystems, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland.
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126
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Cappelli S, Xie Q, Harting J, de Jong A, Prins M. Dynamic wetting: status and prospective of single particle based experiments and simulations. N Biotechnol 2015; 32:420-32. [DOI: 10.1016/j.nbt.2015.02.010] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2014] [Accepted: 02/16/2015] [Indexed: 11/28/2022]
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127
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Building bio-assays with magnetic particles on a digital microfluidic platform. N Biotechnol 2015; 32:485-503. [DOI: 10.1016/j.nbt.2015.03.007] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2014] [Revised: 02/16/2015] [Accepted: 03/13/2015] [Indexed: 12/16/2022]
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128
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Rampini S, Kilinc D, Li P, Monteil C, Gandhi D, Lee GU. Micromagnet arrays for on-chip focusing, switching, and separation of superparamagnetic beads and single cells. LAB ON A CHIP 2015; 15:3370-3379. [PMID: 26160691 DOI: 10.1039/c5lc00581g] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Nonlinear magnetophoresis (NLM) is a novel approach for on-chip transport and separation of superparamagnetic (SPM) beads, based on a travelling magnetic field wave generated by the combination of a micromagnet array (MMA) and an applied rotating magnetic field. Here, we present two novel MMA designs that allow SPM beads to be focused, sorted, and separated on-chip. Converging MMAs were used to rapidly collect the SPM beads from a large region of the chip and focus them into synchronised lines. We characterise the collection efficiency of the devices and demonstrate that they can facilitate on-chip analysis of populations of SPM beads using a single-point optical detector. The diverging MMAs were used to control the transport of the beads and to separate them based on their size. The separation efficiency of these devices was determined by the orientation of the magnetisation of the micromagnets relative to the external magnetic field and the size of the beads and relative to that of micromagnets. By controlling these parameters and the rotation of the external magnetic field we demonstrated the controlled transport of SPM bead-labelled single MDA-MB-231 cells. The use of these novel MMAs promises to allow magnetically-labelled cells to be efficiently isolated and then manipulated on-chip for analysis with high-resolution chemical and physical techniques.
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Affiliation(s)
- S Rampini
- Bionanoscience Group, School of Chemistry and Chemical Biology, UCD, Dublin, Ireland.
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129
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Robinson DA, Yoo JJ, Castañeda AD, Gu B, Dasari R, Crooks RM, Stevenson KJ. Increasing the Collision Rate of Particle Impact Electroanalysis with Magnetically Guided Pt-Decorated Iron Oxide Nanoparticles. ACS NANO 2015; 9:7583-7595. [PMID: 26168795 DOI: 10.1021/acsnano.5b02892] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
An integrated microfluidic/magnetophoretic methodology was developed for improving signal response time and detection limits for the chronoamperometric observation of discrete nanoparticle/electrode interactions by electrocatalytic amplification. The strategy relied on Pt-decorated iron oxide nanoparticles which exhibit both superparamagnetism and electrocatalytic activity for the oxidation of hydrazine. A wet chemical synthetic approach succeeded in the controlled growth of Pt on the surface of FeO/Fe3O4 core/shell nanocubes, resulting in highly uniform Pt-decorated iron oxide hybrid nanoparticles with good dispersibility in water. The unique mechanism of hybrid nanoparticle formation was investigated by electron microscopy and spectroscopic analysis of isolated nanoparticle intermediates and final products. Discrete hybrid nanoparticle collision events were detected in the presence of hydrazine, an electrochemical indicator probe, using a gold microband electrode integrated into a microfluidic channel. In contrast with related systems, the experimental nanoparticle/electrode collision rate correlates more closely with simple theoretical approximations, primarily due to the accuracy of the nanoparticle tracking analysis method used to quantify nanoparticle concentrations and diffusion coefficients. Further modification of the microfluidic device was made by applying a tightly focused magnetic field to the detection volume to attract the magnetic nanoprobes to the microband working electrode, thereby resulting in a 6-fold increase to the relative frequency of chronoamperometric signals corresponding to discrete nanoparticle impact events.
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Affiliation(s)
- Donald A Robinson
- Department of Chemistry, Center for Nano- and Molecular Science and Technology, Texas Materials Institute, and Center for Electrochemistry, The University of Texas at Austin, Austin, Texas 78712, United States
| | - Jason J Yoo
- Department of Chemistry, Center for Nano- and Molecular Science and Technology, Texas Materials Institute, and Center for Electrochemistry, The University of Texas at Austin, Austin, Texas 78712, United States
| | - Alma D Castañeda
- Department of Chemistry, Center for Nano- and Molecular Science and Technology, Texas Materials Institute, and Center for Electrochemistry, The University of Texas at Austin, Austin, Texas 78712, United States
| | - Brett Gu
- Department of Chemistry, Center for Nano- and Molecular Science and Technology, Texas Materials Institute, and Center for Electrochemistry, The University of Texas at Austin, Austin, Texas 78712, United States
| | - Radhika Dasari
- Department of Chemistry, Center for Nano- and Molecular Science and Technology, Texas Materials Institute, and Center for Electrochemistry, The University of Texas at Austin, Austin, Texas 78712, United States
| | - Richard M Crooks
- Department of Chemistry, Center for Nano- and Molecular Science and Technology, Texas Materials Institute, and Center for Electrochemistry, The University of Texas at Austin, Austin, Texas 78712, United States
| | - Keith J Stevenson
- Department of Chemistry, Center for Nano- and Molecular Science and Technology, Texas Materials Institute, and Center for Electrochemistry, The University of Texas at Austin, Austin, Texas 78712, United States
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130
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Nejdl L, Nguyen HV, Richtera L, Krizkova S, Guran R, Masarik M, Hynek D, Heger Z, Lundberg K, Erikson K, Adam V, Kizek R. Label-free bead-based metallothionein electrochemical immunosensor. Electrophoresis 2015; 36:1894-904. [PMID: 26033737 DOI: 10.1002/elps.201500069] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2015] [Revised: 05/06/2015] [Accepted: 05/09/2015] [Indexed: 12/12/2022]
Abstract
A novel microfluidic label-free bead-based metallothionein immunosensors was designed. To the surface of superparamagnetic agarose beads coated with protein A, polyclonal chicken IgY specifically recognizing metallothionein (MT) were immobilized via rabbit IgG. The Brdicka reaction was used for metallothionein detection in a microfluidic printed 3D chip. The assembled chip consisted of a single copper wire coated with a thin layer of amalgam as working electrode. Optimization of MT detection using designed microfluidic chip was performed in stationary system as well as in the flow arrangement at various flow rates (0-1800 μL/min). In stationary arrangement it is possible to detect MT concentrations up to 30 ng/mL level, flow arrangement allows reliable detection of even lower concentration (12.5 ng/mL). The assembled miniature flow chip was subsequently tested for the detection of MT elevated levels (at approx. level 100 μg/mL) in samples of patients with cancer. The stability of constructed device for metallothionein detection in flow arrangement was found to be several days without any maintenance needed.
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Affiliation(s)
- Lukas Nejdl
- Central European Institute of Technology, Brno University of Technology, Brno, Czech Republic.,Department of Chemistry and Biochemistry, Mendel University in Brno, Brno, Czech Republic
| | - Hoai Viet Nguyen
- Central European Institute of Technology, Brno University of Technology, Brno, Czech Republic.,Department of Chemistry and Biochemistry, Mendel University in Brno, Brno, Czech Republic
| | - Lukas Richtera
- Central European Institute of Technology, Brno University of Technology, Brno, Czech Republic.,Department of Chemistry and Biochemistry, Mendel University in Brno, Brno, Czech Republic
| | - Sona Krizkova
- Central European Institute of Technology, Brno University of Technology, Brno, Czech Republic.,Department of Chemistry and Biochemistry, Mendel University in Brno, Brno, Czech Republic
| | - Roman Guran
- Central European Institute of Technology, Brno University of Technology, Brno, Czech Republic.,Department of Chemistry and Biochemistry, Mendel University in Brno, Brno, Czech Republic
| | - Michal Masarik
- Department of Pathological Physiology, Faculty of Medicine, Masaryk University, Brno, Czech Republic
| | - David Hynek
- Central European Institute of Technology, Brno University of Technology, Brno, Czech Republic.,Department of Chemistry and Biochemistry, Mendel University in Brno, Brno, Czech Republic
| | - Zbynek Heger
- Central European Institute of Technology, Brno University of Technology, Brno, Czech Republic.,Department of Chemistry and Biochemistry, Mendel University in Brno, Brno, Czech Republic
| | - Karin Lundberg
- Lab on a Bead AΒ, Division of Research and Development, Uppsala, Sweden
| | - Kristofer Erikson
- Lab on a Bead AΒ, Division of Research and Development, Uppsala, Sweden.,Department of Engineering Sciences, Division of Solid State Physics, The Ångström Laboratory, Uppsala University, Uppsala, Sweden
| | - Vojtech Adam
- Central European Institute of Technology, Brno University of Technology, Brno, Czech Republic.,Department of Chemistry and Biochemistry, Mendel University in Brno, Brno, Czech Republic
| | - Rene Kizek
- Central European Institute of Technology, Brno University of Technology, Brno, Czech Republic.,Department of Chemistry and Biochemistry, Mendel University in Brno, Brno, Czech Republic
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131
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van Reenen A, de Jong AM, Prins MWJ. Transportation, dispersion and ordering of dense colloidal assemblies by magnetic interfacial rotaphoresis. LAB ON A CHIP 2015; 15:2864-2871. [PMID: 26023744 DOI: 10.1039/c5lc00294j] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Colloidal systems exhibit intriguing assembly phenomena with impact in a wide variety of technological fields. The use of magnetically responsive colloids allows one to exploit interactions with an anisotropic dipolar nature. Here, we reveal magnetic interfacial rotaphoresis - a magnetically-induced rotational excitation that imposes a translational motion on colloids by a strong interaction with a solid-liquid interface - as a means to transport, disperse, and order dense colloidal assemblies. By balancing magnetic dipolar and hydrodynamic interactions at a symmetry-breaking interface, rotaphoresis effectuates a translational dispersive motion of the colloids and surprisingly transforms large and dense multilayer assemblies into single-particle layers with quasi-hexagonal ordering within seconds and with velocities of mm s(-1). We demonstrate the application of interfacial rotaphoresis to enhance molecular target capture, showing an increase of the molecular capture rate by more than an order of magnitude.
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Affiliation(s)
- A van Reenen
- Department of Applied Physics, Eindhoven University of Technology, 5600 MB Eindhoven, The Netherlands
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132
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Takamura T, Ko PJ, Sharma J, Yukino R, Ishizawa S, Sandhu A. Magnetic-particle-sensing based diagnostic protocols and applications. SENSORS 2015; 15:12983-98. [PMID: 26053747 PMCID: PMC4507658 DOI: 10.3390/s150612983] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/16/2015] [Revised: 05/18/2015] [Accepted: 05/19/2015] [Indexed: 11/16/2022]
Abstract
Magnetic particle-labeled biomaterial detection has attracted much attention in recent years for a number of reasons; easy manipulation by external magnetic fields, easy functionalization of the surface, and large surface-to-volume ratio, to name but a few. In this review, we report on our recent investigations into the detection of nano-sized magnetic particles. First, the detection by Hall magnetic sensor with lock-in amplifier and alternative magnetic field is summarized. Then, our approach to detect sub-200 nm diameter target magnetic particles via relatively large micoro-sized “columnar particles” by optical microscopy is described. Subsequently, we summarize magnetic particle detection based on optical techniques; one method is based on the scattering of the magnetically-assembled nano-sized magnetic bead chain in rotating magnetic fields and the other one is based on the reflection of magnetic target particles and porous silicon. Finally, we report recent works with reference to more familiar industrial products (such as smartphone-based medical diagnosis systems and magnetic removal of unspecific-binded nano-sized particles, or “magnetic washing”).
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Affiliation(s)
- Tsukasa Takamura
- Electronics-Inspired Interdisciplinary Research Institute (EIIRIS), Toyohashi University of Technology, 1-1 Hibarigaoka, Tempaku, Toyohashi, Aichi 441-8580, Japan.
| | - Pil Ju Ko
- Research Promotion Center, The University of Electro-Communications, 1-5-1 Chofugaoka Chofu, Tokyo 182-8585, Japan.
| | - Jaiyam Sharma
- Department of Electrical and Electronic Information Engineering, Toyohashi University of Technology, 1-1 Hibarigaoka, Tempaku, Toyohashi, Aichi 441-8580, Japan.
| | - Ryoji Yukino
- Department of Electrical and Electronic Information Engineering, Toyohashi University of Technology, 1-1 Hibarigaoka, Tempaku, Toyohashi, Aichi 441-8580, Japan.
| | - Shunji Ishizawa
- Department of Electrical and Electronic Information Engineering, Toyohashi University of Technology, 1-1 Hibarigaoka, Tempaku, Toyohashi, Aichi 441-8580, Japan.
| | - Adarsh Sandhu
- Electronics-Inspired Interdisciplinary Research Institute (EIIRIS), Toyohashi University of Technology, 1-1 Hibarigaoka, Tempaku, Toyohashi, Aichi 441-8580, Japan.
- Research Promotion Center, The University of Electro-Communications, 1-5-1 Chofugaoka Chofu, Tokyo 182-8585, Japan.
- Department of Engineering Science, University of Electro-Communications, 1-5-1 Chofugaoka, Chofu, Tokyo 182-8585, Japan.
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133
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Duits MHG, Ghosh S, Mugele F. Measuring advection and diffusion of colloids in shear flow. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2015; 31:5689-5700. [PMID: 25965857 DOI: 10.1021/acs.langmuir.5b01369] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
An analysis of the dynamics of colloids in shear flow can be challenging because of the superposition of diffusion and advection. We present a method that separates the two motions, starting from the time-dependent particle coordinates. The restriction of the tracking to flow lanes and the subtraction of estimated advective displacements are combined in an iterative scheme that eventually makes the spatial segmentation redundant. Tracking errors due to the neglect of lateral diffusion are avoided, while drifts parallel and perpendicular to the flow are eliminated. After explaining the principles of our method, we validate it against both computer simulations and experiments. A critical overall test is provided by the mean square displacement function at high Peclet numbers (up to 50). We demonstrate via simulations how the measurement accuracy depends on diffusion coefficients and flow rates, expressed in units of camera pixels and frames. Also, sample-specific issues are addressed: inaccuracies in the velocity profile for dilute suspensions (volume fraction ≤0.03) and tracking errors for concentrated ones (VF ≥ 0.3). An analysis of experiments with colloidal spheres flowing through microchannels corroborates these findings and indicates perspectives for studies on transport, mixing, or rheology in microfluidic environments.
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Affiliation(s)
- M H G Duits
- Physics of Complex Fluids Group, MESA+ Institute, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands
| | - S Ghosh
- Physics of Complex Fluids Group, MESA+ Institute, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands
| | - F Mugele
- Physics of Complex Fluids Group, MESA+ Institute, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands
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134
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van Oene MM, Dickinson LE, Pedaci F, Köber M, Dulin D, Lipfert J, Dekker NH. Biological magnetometry: torque on superparamagnetic beads in magnetic fields. PHYSICAL REVIEW LETTERS 2015; 114:218301. [PMID: 26066460 DOI: 10.1103/physrevlett.114.218301] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/19/2014] [Indexed: 06/04/2023]
Abstract
Superparamagnetic beads are widely used in biochemistry and single-molecule biophysics, but the nature of the anisotropy that enables the application of torques remains controversial. To quantitatively investigate the torques experienced by superparamagnetic particles, we use a biological motor to rotate beads in a magnetic field and demonstrate that the underlying potential is π periodic. In addition, we tether a bead to a single DNA molecule and show that the angular trap stiffness increases nonlinearly with magnetic field strength. Our results indicate that the superparamagnetic beads' anisotropy derives from a nonuniform intrabead distribution of superparamagnetic nanoparticles.
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Affiliation(s)
- Maarten M van Oene
- Department of Bionanoscience, Kavli Institute of Nanoscience, Delft University of Technology, Lorentzweg 1, 2628 CJ Delft, Netherlands
| | - Laura E Dickinson
- Department of Bionanoscience, Kavli Institute of Nanoscience, Delft University of Technology, Lorentzweg 1, 2628 CJ Delft, Netherlands
| | - Francesco Pedaci
- Department of Bionanoscience, Kavli Institute of Nanoscience, Delft University of Technology, Lorentzweg 1, 2628 CJ Delft, Netherlands
- Department of Single-Molecule Biophysics, Centre de Biochimie Structurale, UMR 5048 CNRS, Montpellier, France
| | - Mariana Köber
- Department of Bionanoscience, Kavli Institute of Nanoscience, Delft University of Technology, Lorentzweg 1, 2628 CJ Delft, Netherlands
| | - David Dulin
- Department of Bionanoscience, Kavli Institute of Nanoscience, Delft University of Technology, Lorentzweg 1, 2628 CJ Delft, Netherlands
| | - Jan Lipfert
- Department of Bionanoscience, Kavli Institute of Nanoscience, Delft University of Technology, Lorentzweg 1, 2628 CJ Delft, Netherlands
- Department of Physics, Nanosystems Initiative Munich, and Center for NanoScience, Ludwig-Maximilian-University, Amalienstrasse 54, 80799 Munich, Germany
| | - Nynke H Dekker
- Department of Bionanoscience, Kavli Institute of Nanoscience, Delft University of Technology, Lorentzweg 1, 2628 CJ Delft, Netherlands
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135
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Yang S, Cao C, Sun Y, Huang P, Wei F, Song W. Nanoscale Magnetic Stirring Bars for Heterogeneous Catalysis in Microscopic Systems. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201410360] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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136
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Yang S, Cao C, Sun Y, Huang P, Wei F, Song W. Nanoscale Magnetic Stirring Bars for Heterogeneous Catalysis in Microscopic Systems. Angew Chem Int Ed Engl 2015; 54:2661-4. [DOI: 10.1002/anie.201410360] [Citation(s) in RCA: 91] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2014] [Indexed: 11/07/2022]
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137
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Gao Y, Beerens J, van Reenen A, Hulsen MA, de Jong AM, Prins MWJ, den Toonder JMJ. Strong vortical flows generated by the collective motion of magnetic particle chains rotating in a fluid cell. LAB ON A CHIP 2015; 15:351-60. [PMID: 25380482 DOI: 10.1039/c4lc01198h] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
Magnetic microparticles, assembled into chains that are actuated with rotating magnetic fields, can be used as microstirrers to promote fluid transport and biochemical reactions in microfluidic systems. We show that, within a certain range of magnetic field rotation frequency, the microstirrers exhibit a coherent collective motion: the rotating magnetic particle chains move throughout the volume of a flat fluid cell and generate very strong (~1 mm s(-1)) and global (9 mm) vortical fluid flows, with many eddy-type substructures that fluctuate continuously in time, resembling turbulent flow. The collective motion makes the microstirrers not only defy gravity, but also move against magnetic field gradients. The induced fluid flow is directly related to the stirring rate and the amount of magnetic particle chains. The observed behavior is caused by the magnetic and hydrodynamic interactions between the magnetic microparticles and the fluid. We utilized the phenomenon of swarming particles to enhance biochemical assays with magnetic capture particles (4000 μL(-1)) and IgG targets (500 pM). When compared to a reference system of sedimented magnetic capture particles, magnetic actuation leads to both a ~9 times increase in the initial assay kinetics as well as a ~7 times increase of target capture signal after 30 minutes.
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Affiliation(s)
- Yang Gao
- Department of Mechanical Engineering, Eindhoven University of Technology, Den Dolech 2, 5600 MB Eindhoven, The Netherlands.
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138
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Tarn MD, Elders LT, Peyman SA, Pamme N. Diamagnetic repulsion of particles for multilaminar flow assays. RSC Adv 2015. [DOI: 10.1039/c5ra21867e] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A continuous multilaminar flow reaction was performed on functionalised polymer particlesviadiamagnetic repulsion forces, using a simple, inexpensive setup.
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139
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Berenguel-Alonso M, Granados X, Faraudo J, Alonso-Chamarro J, Puyol M. Magnetic actuator for the control and mixing of magnetic bead-based reactions on-chip. Anal Bioanal Chem 2014; 406:6607-16. [DOI: 10.1007/s00216-014-8100-5] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2014] [Revised: 08/07/2014] [Accepted: 08/08/2014] [Indexed: 10/24/2022]
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140
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Khnouf R, Goet G, Baier T, Hardt S. Increasing the sensitivity of microfluidics based immunoassays using isotachophoresis. Analyst 2014; 139:4564-71. [DOI: 10.1039/c4an00545g] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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141
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van Reenen A, Gao Y, de Jong AM, Hulsen MA, den Toonder JMJ, Prins MWJ. Dynamics of magnetic particles near a surface: model and experiments on field-induced disaggregation. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2014; 89:042306. [PMID: 24827250 DOI: 10.1103/physreve.89.042306] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/31/2013] [Indexed: 06/03/2023]
Abstract
Magnetic particles are widely used in biological research and bioanalytical applications. As the corresponding tools are progressively being miniaturized and integrated, the understanding of particle dynamics and the control of particles down to the level of single particles become important. Here, we describe a numerical model to simulate the dynamic behavior of ensembles of magnetic particles, taking account of magnetic interparticle interactions, interactions with the liquid medium and solid surfaces, as well as thermal diffusive motion of the particles. The model is verified using experimental data of magnetic field-induced disaggregation of magnetic particle clusters near a physical surface, wherein the magnetic field properties, particle size, cluster size, and cluster geometry were varied. Furthermore, the model clarifies how the cluster configuration, cluster alignment, magnitude of the field gradient, and the field repetition rate play a role in the particle disaggregation process. The simulation model will be very useful for further in silico studies on magnetic particle dynamics in biotechnological tools.
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Affiliation(s)
- A van Reenen
- Department of Applied Physics, Eindhoven University of Technology, Eindhoven, The Netherlands and Institute for Complex Molecular Systems (ICMS), Eindhoven, The Netherlands
| | - Y Gao
- Department of Mechanical Engineering, Eindhoven University of Technology, Eindhoven, The Netherlands and Institute for Complex Molecular Systems (ICMS), Eindhoven, The Netherlands
| | - A M de Jong
- Department of Applied Physics, Eindhoven University of Technology, Eindhoven, The Netherlands and Institute for Complex Molecular Systems (ICMS), Eindhoven, The Netherlands
| | - M A Hulsen
- Department of Mechanical Engineering, Eindhoven University of Technology, Eindhoven, The Netherlands
| | - J M J den Toonder
- Department of Mechanical Engineering, Eindhoven University of Technology, Eindhoven, The Netherlands and Institute for Complex Molecular Systems (ICMS), Eindhoven, The Netherlands
| | - M W J Prins
- Department of Applied Physics, Eindhoven University of Technology, Eindhoven, The Netherlands and Institute for Complex Molecular Systems (ICMS), Eindhoven, The Netherlands and Philips Research, Eindhoven, The Netherlands
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