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  • 1.
    Arwin, Hans
    et al.
    Linköping University, The Institute of Technology. Linköping University, Department of Physics, Chemistry and Biology, Applied Optics .
    Bakker, Jimmy
    Linköping University, The Institute of Technology. Linköping University, Department of Physics, Chemistry and Biology, Applied Optics .
    Filippini, Daniel
    Linköping University, The Institute of Technology. Linköping University, Department of Physics, Chemistry and Biology, Applied Physics .
    Lundström, Ingemar
    Linköping University, The Institute of Technology. Linköping University, Department of Physics, Chemistry and Biology, Applied Physics .
    Computer screen photo-assisted measurement of intensity or polarization change of light upon interaction with a sample2006Patent (Other (popular science, discussion, etc.))
  • 2.
    Arwin, Hans
    et al.
    Linköping University, The Institute of Technology. Linköping University, Department of Physics, Chemistry and Biology, Applied Optics .
    Bakker, Jimmy
    Linköping University, The Institute of Technology. Linköping University, Department of Physics, Chemistry and Biology, Applied Optics .
    Lundström, Ingemar
    Linköping University, The Institute of Technology. Linköping University, Department of Physics, Chemistry and Biology, Applied Physics .
    Filippini, Daniel
    Linköping University, The Institute of Technology. Linköping University, Department of Physics, Chemistry and Biology, Applied Physics .
    A computer as imaging ellipsometer: biosensing at home2006In: Europtrode VIII,2006, 2006Conference paper (Other academic)
  • 3.
    Arwin, Hans
    et al.
    Linköping University, The Institute of Technology. Linköping University, Department of Physics, Chemistry and Biology, Applied Optics .
    Lundström, Ingemar
    Linköping University, The Institute of Technology. Linköping University, Department of Physics, Chemistry and Biology, Applied Physics .
    Filippini, Daniel
    Linköping University, The Institute of Technology. Linköping University, Department of Physics, Chemistry and Biology, Applied Physics .
    Bakker, Jimmy
    Linköping University, The Institute of Technology. Linköping University, Department of Physics, Chemistry and Biology, Applied Optics .
    Computer screen photo-assisted ellipsometry2006In: 4th Workshop Ellipsometry,2006, 2006Conference paper (Other academic)
    Abstract [en]

      

  • 4.
    Bakker, Jimmy
    et al.
    Linköping University, The Institute of Technology. Linköping University, Department of Physics, Chemistry and Biology, Applied Optics .
    Arwin, Hans
    Linköping University, The Institute of Technology. Linköping University, Department of Physics, Chemistry and Biology, Applied Optics .
    Lundström, Ingemar
    Linköping University, The Institute of Technology. Linköping University, Department of Physics, Chemistry and Biology, Applied Physics .
    Filippini, Daniel
    Linköping University, The Institute of Technology. Linköping University, Department of Physics, Chemistry and Biology, Applied Physics .
    Biosensor for home use: using the computer as ellipsometer2006Other (Other (popular science, discussion, etc.))
    Abstract [en]

    Konferensbidrag (muntligt-1:a pris) vid "EUROPT(R)ODE VIII, Tübingen, Germany, 2-5 april

  • 5.
    Bakker, Jimmy
    et al.
    Linköping University, The Institute of Technology. Linköping University, Department of Physics, Chemistry and Biology, Applied Optics .
    Filippini, Daniel
    Linköping University, The Institute of Technology. Linköping University, Department of Physics, Chemistry and Biology, Applied Physics .
    Lundström, Ingemar
    Linköping University, The Institute of Technology. Linköping University, Department of Physics, Chemistry and Biology, Applied Physics .
    Fluorescence based sensing in a CSPT setup2005In: Medicinteknikdagarna,2005, 2005Conference paper (Other academic)
  • 6.
    Bakker, Jimmy W. P.
    Linköping University, Department of Physics, Chemistry and Biology, Applied Optics . Linköping University, The Institute of Technology.
    New methodology for optical sensing and analysis2004Licentiate thesis, comprehensive summary (Other academic)
    Abstract [en]

    This thesis describes the research I have done, and partly will do, during my time as a PhD student in the laboratory of Applied Optics at Linköping University. Due to circumstances beyond the scope of this book, this incorporates three quite different projects. The first two, involving gas sensing and measuring on paper with ellipsometry, have been discontinued, whereas the third one, measuring fluorescence with a computer screen and web camera, is in full progress and will be until I complete my studies.

    Thus the purpose of this work also has several aspects. Partly, it describes performed research and its results, as well as theoretical background. On the other hand, it provides practical and theoretical background necessary for future work. While the three projects are truly quite different, each of them has certain things in common with each of the other. This is certainly also true for the necessary theory. Two of them involve spectroscopic ellipsometry, for example, while another pair needs knowledge of color theory, etc. This makes it impossible to separate the projects, despite of their differences. Hopefully, these links between the different projects, connecting the different chapters, will make this work whole and consistent in its own way.

    List of papers
    1. Improvement of porous silicon based gas sensors by polymer modification
    Open this publication in new window or tab >>Improvement of porous silicon based gas sensors by polymer modification
    2003 (English)In: Physica Status Solidi (A), ISSN 0031-8965, Vol. 197, no 2, p. 378-381Article in journal (Refereed) Published
    Abstract [en]

    Gas sensing was performed using spectroscopic ellipsometry and porous silicon films. Modification of the porous layer by polymer deposition showed an increase in sensitivity to organic solvent vapor of up to 135%. The increase in sensitivity is strongly dependent on polymer concentration. At high concentrations, too much polymer is deposited, presumably blocking the pores, causing a decrease in sensitivity. At sufficiently low concentrations, the polymer causes a strong increase in sensitivity. This is assumed to be caused by the polymer being deposited inside the pores, where its interaction with the vapor influences the sensitivity. At very low concentration, the sensitivity approaches values obtained without polymer modification. The sensitivity increase is different for different vapors, pointing to possible selectivity enhancement.

    Keywords
    07.07.Df, 61.43.Gt, 78.67.Bf, 82.35.Gh
    National Category
    Engineering and Technology
    Identifiers
    urn:nbn:se:liu:diva-13772 (URN)10.1002/pssa.200306529 (DOI)
    Available from: 2004-12-10 Created: 2004-12-10 Last updated: 2013-10-14
    2. Determination of refractive index of printed and unprinted paper using spectroscopic ellipsometry.
    Open this publication in new window or tab >>Determination of refractive index of printed and unprinted paper using spectroscopic ellipsometry.
    2004 (English)In: Thin Solid Films, ISSN 0040-6090, Vol. 455-456, p. 361-365Article in journal (Refereed) Published
    Abstract [en]

    An attempt is made to address the basic physical properties of printed and unprinted paper surfaces by using spectroscopic ellipsometry in the range 300–900 nm to determine the effective complex-valued refractive index N. Some simulations to address the effect of structural properties have also been done and a qualitative comparison with some other methods, in particular Brewster angle measurements, has been made. Unprinted paper and paper printed in different colors have been studied. The measured absorption properties matched the colors of the used inks well. The effects of roughness on the determined spectra of N are discussed. Simulations show that compared to other methods, like Brewster-angle reflectometry, spectroscopic ellipsometry provides a more accurate value of N, especially in wavelength regions were the color pigments show absorption.

    Keywords
    Spectroscopic ellipsometry; Paper surfaces; Optical properties; Gloss variation
    National Category
    Engineering and Technology
    Identifiers
    urn:nbn:se:liu:diva-13773 (URN)10.1016/j.tsf.2004.01.024 (DOI)
    Available from: 2004-12-10 Created: 2004-12-10 Last updated: 2013-10-14
    3. Enhancing classification capabilities of computer screen photo-assisted fluorescence fingerprinting
    Open this publication in new window or tab >>Enhancing classification capabilities of computer screen photo-assisted fluorescence fingerprinting
    2005 (English)In: Sensors and Actuators B: Chemical, ISSN 0925-4005, Vol. 110, no 2, p. 190-194Article in journal (Refereed) Published
    Abstract [en]

    The separation of emission from transmitted light for the fingerprinting of fluorescent substances using a computer screen photo-assisted technique (CSPT) is demonstrated. CSPT is a technique for optical evaluation using a simple cell with just a standard computer set and a web camera as instrumentation. It has been demonstrated to be a versatile system for colorimetric and fluorescent fingerprinting. Here the omnidirectional property of fluorescent emission is utilized to separate it from the background, using a simple optical arrangement compatible with CSPT purposes. This enhances the classification capabilities and makes classification at sub-μM concentrations possible.

    Keywords
    Computer screen photo-assisted technique; Fluorescence; Spectral fingerprinting; Bioassays; Home tests
    National Category
    Engineering and Technology
    Identifiers
    urn:nbn:se:liu:diva-13774 (URN)10.1016/j.snb.2005.01.046 (DOI)
    Available from: 2004-12-10 Created: 2004-12-10 Last updated: 2009-09-08
  • 7.
    Bakker, Jimmy W. P.
    Linköping University, Department of Physics, Chemistry and Biology, Applied Optics . Linköping University, The Institute of Technology.
    Optical Detection Using Computer Screen Photo-assisted Techniques and Ellipsometry2006Doctoral thesis, comprehensive summary (Other academic)
    Abstract [en]

    Two main subjects, ellipsometry and computer screen photo-assisted techniques (CSPT), form the main line in this thesis. Ellipsometry is an optical technique based on the detection of polarization changes of light upon interaction with a sample. As most optical detection techniques it is non-intrusive and an additional advantage is its high surface sensitivity: thickness resolution in the order of pm can in principle be achieved. Therefore, ellipsometry is widely used as a technique for determination of optical constants and layer thickness for thin-layer structures. Lately ellipsometry has also been proposed for sensing applications, utilizing the detection of changes in the properties of thin layers. One application is described in this thesis concerning the detection of volatile organic solvents in gas phase using modified porous silicon layers, fabricated by electrochemical etching of silicon to create nm-sized pores. This greatly increases the surface area, promoting gas detection because the number of adsorption sites increases. Other applications of ellipsometry discussed in this thesis are based on combination with CSPT.

    CSPT is a way to exploit existing optical techniques for use in low-cost applications. In CSPT the computer screen itself is used as a (programmable) light source for optical measurements. For detection a web camera can be used and the whole measurement platform is formed by the computer. Since computers are available almost everywhere, this is a promising way to create optical measurement techniques for widespread use, for example in home-diagnostics. Since the only thing that needs to be added is a sample holder governing the physical or chemical process and directing the light, the cost can be kept very low. First, the use of CSPT for the measurement of fluorescence is described. Fluorescence is used in many detection applications, usually by chemically attaching a fluorescent marker molecule to a suitable species in the process and monitoring the fluorescent emission. The detection of fluorescence is shown to be possible using CSPT, first in a cuvette-based setup, then using a custom designed micro array. In the latter, polarizers were used for contrast enhancement, which in turn led to the implementation of an existing idea to test CSPT for ellipsometry measurements. In a first demonstration, involving thickness measurement of silicon dioxide on silicon, a thickness resolution in the order of nm was already achieved. After improvement of the system, gradients in protein layers could be detected, opening the door toward biosensor applications. Some further development will be needed to make the CSPT applications described here ready for the market, but the results so far are certainly promising.

    List of papers
    1. Improvement of porous silicon based gas sensors by polymer modification
    Open this publication in new window or tab >>Improvement of porous silicon based gas sensors by polymer modification
    2003 (English)In: Physica Status Solidi (A), ISSN 0031-8965, Vol. 197, no 2, p. 378-381Article in journal (Refereed) Published
    Abstract [en]

    Gas sensing was performed using spectroscopic ellipsometry and porous silicon films. Modification of the porous layer by polymer deposition showed an increase in sensitivity to organic solvent vapor of up to 135%. The increase in sensitivity is strongly dependent on polymer concentration. At high concentrations, too much polymer is deposited, presumably blocking the pores, causing a decrease in sensitivity. At sufficiently low concentrations, the polymer causes a strong increase in sensitivity. This is assumed to be caused by the polymer being deposited inside the pores, where its interaction with the vapor influences the sensitivity. At very low concentration, the sensitivity approaches values obtained without polymer modification. The sensitivity increase is different for different vapors, pointing to possible selectivity enhancement.

    Keywords
    07.07.Df, 61.43.Gt, 78.67.Bf, 82.35.Gh
    National Category
    Engineering and Technology
    Identifiers
    urn:nbn:se:liu:diva-13772 (URN)10.1002/pssa.200306529 (DOI)
    Available from: 2004-12-10 Created: 2004-12-10 Last updated: 2013-10-14
    2. Enhancing classification capabilities of computer screen photo-assisted fluorescence fingerprinting
    Open this publication in new window or tab >>Enhancing classification capabilities of computer screen photo-assisted fluorescence fingerprinting
    2005 (English)In: Sensors and Actuators B: Chemical, ISSN 0925-4005, Vol. 110, no 2, p. 190-194Article in journal (Refereed) Published
    Abstract [en]

    The separation of emission from transmitted light for the fingerprinting of fluorescent substances using a computer screen photo-assisted technique (CSPT) is demonstrated. CSPT is a technique for optical evaluation using a simple cell with just a standard computer set and a web camera as instrumentation. It has been demonstrated to be a versatile system for colorimetric and fluorescent fingerprinting. Here the omnidirectional property of fluorescent emission is utilized to separate it from the background, using a simple optical arrangement compatible with CSPT purposes. This enhances the classification capabilities and makes classification at sub-μM concentrations possible.

    Keywords
    Computer screen photo-assisted technique; Fluorescence; Spectral fingerprinting; Bioassays; Home tests
    National Category
    Engineering and Technology
    Identifiers
    urn:nbn:se:liu:diva-13774 (URN)10.1016/j.snb.2005.01.046 (DOI)
    Available from: 2004-12-10 Created: 2004-12-10 Last updated: 2009-09-08
    3. Two-dimensional micro array fluorescence fingerprinting with a computer screen photo-assisted technique
    Open this publication in new window or tab >>Two-dimensional micro array fluorescence fingerprinting with a computer screen photo-assisted technique
    2005 (English)In: Spectral Imaging: Instrumentation, Applications, and Analysis III, 2005, p. 9-15Conference paper, Published paper (Other academic)
    Abstract [en]

    Detection and classification of fluorescent dyes are demonstrated using a computer screen photo-assisted technique (CSPT). This technique has previously been demonstrated for analyzing fluorescence from 96 wells microtiterplates (200 µl per well) and from a single cuvette with some optics to enhance sensitivity. In this work a custom designed array of wells with a volume of approximately 1 mu;l is used. In order to measure such small volumes without saturating the detector, the transmitted light is masked by placing the sample between two crossed polarizers. This arrangement blocks nearly all the transmitted light, while the emitted light, which is nearly unpolarized, can still be detected. The lowest amount (concentration x volume) of analyte detectable in this setup is about 40 times smaller than in the previous setups.

    National Category
    Natural Sciences
    Identifiers
    urn:nbn:se:liu:diva-13835 (URN)10.1117/12.589586 (DOI)
    Available from: 2006-05-04 Created: 2006-05-04 Last updated: 2009-04-28
    4. Computer screen photo-assisted off-null ellipsometry
    Open this publication in new window or tab >>Computer screen photo-assisted off-null ellipsometry
    2006 (English)In: Applied Optics, ISSN 1559-128X, E-ISSN 2155-3165, Vol. 45, no 30, p. 7795-7799Article in journal (Refereed) Published
    Abstract [en]

    The ellipsometric measurement of thickness is demonstrated using a computer screen as a light source and a webcam as a detector, adding imaging off-null ellipsometry to the range of available computer screen photoassisted techniques. The results show good qualitative agreement with a simplified theoretical model and a thickness resolution in the nanometer range is achieved. The presented model can be used to optimize the setup for sensitivity. Since the computer screen serves as a homogeneous large area illumination source, which can be tuned to different intensities for different parts of the sample, a large sensitivity range can be obtained without sacrificing thickness resolution.

    National Category
    Engineering and Technology
    Identifiers
    urn:nbn:se:liu:diva-13836 (URN)10.1364/AO.45.007795 (DOI)
    Available from: 2006-05-04 Created: 2006-05-04 Last updated: 2017-12-13
    5. Non-labeled immunodetection with a computer screen photo-assisted technique
    Open this publication in new window or tab >>Non-labeled immunodetection with a computer screen photo-assisted technique
    Manuscript (Other academic)
    Identifiers
    urn:nbn:se:liu:diva-13837 (URN)
    Available from: 2006-05-04 Created: 2006-05-04 Last updated: 2010-01-13
  • 8.
    Bakker, Jimmy W. P.
    et al.
    Linköping University, Department of Physics, Chemistry and Biology, Applied Optics . Linköping University, The Institute of Technology.
    Arwin, Hans
    Linköping University, Department of Physics, Chemistry and Biology, Applied Optics . Linköping University, The Institute of Technology.
    Wang, Guoliang
    Linköping University, Department of Physics, Chemistry and Biology. Linköping University, The Institute of Technology.
    Järrendahl, K.
    Improvement of porous silicon based gas sensors by polymer modification2003In: Physica Status Solidi (A), ISSN 0031-8965, Vol. 197, no 2, p. 378-381Article in journal (Refereed)
    Abstract [en]

    Gas sensing was performed using spectroscopic ellipsometry and porous silicon films. Modification of the porous layer by polymer deposition showed an increase in sensitivity to organic solvent vapor of up to 135%. The increase in sensitivity is strongly dependent on polymer concentration. At high concentrations, too much polymer is deposited, presumably blocking the pores, causing a decrease in sensitivity. At sufficiently low concentrations, the polymer causes a strong increase in sensitivity. This is assumed to be caused by the polymer being deposited inside the pores, where its interaction with the vapor influences the sensitivity. At very low concentration, the sensitivity approaches values obtained without polymer modification. The sensitivity increase is different for different vapors, pointing to possible selectivity enhancement.

  • 9.
    Bakker, Jimmy. W. P.
    et al.
    Linköping University, Department of Physics, Chemistry and Biology, Applied Optics . Linköping University, The Institute of Technology.
    Bryntse, G.
    Arwin, Hans
    Linköping University, Department of Physics, Chemistry and Biology, Applied Optics . Linköping University, The Institute of Technology.
    Determination of refractive index of printed and unprinted paper using spectroscopic ellipsometry.2004In: Thin Solid Films, ISSN 0040-6090, Vol. 455-456, p. 361-365Article in journal (Refereed)
    Abstract [en]

    An attempt is made to address the basic physical properties of printed and unprinted paper surfaces by using spectroscopic ellipsometry in the range 300–900 nm to determine the effective complex-valued refractive index N. Some simulations to address the effect of structural properties have also been done and a qualitative comparison with some other methods, in particular Brewster angle measurements, has been made. Unprinted paper and paper printed in different colors have been studied. The measured absorption properties matched the colors of the used inks well. The effects of roughness on the determined spectra of N are discussed. Simulations show that compared to other methods, like Brewster-angle reflectometry, spectroscopic ellipsometry provides a more accurate value of N, especially in wavelength regions were the color pigments show absorption.

  • 10.
    Bakker, Jimmy W. P.
    et al.
    Linköping University, Department of Physics, Chemistry and Biology, Applied Optics . Linköping University, The Institute of Technology.
    Filippini, Daniel
    Linköping University, Department of Physics, Chemistry and Biology, Applied Physics . Linköping University, The Institute of Technology.
    Lundström, Ingemar
    Linköping University, Department of Physics, Chemistry and Biology, Applied Physics . Linköping University, The Institute of Technology.
    Enhancing classification capabilities of computer screen photo-assisted fluorescence fingerprinting2005In: Sensors and Actuators B: Chemical, ISSN 0925-4005, Vol. 110, no 2, p. 190-194Article in journal (Refereed)
    Abstract [en]

    The separation of emission from transmitted light for the fingerprinting of fluorescent substances using a computer screen photo-assisted technique (CSPT) is demonstrated. CSPT is a technique for optical evaluation using a simple cell with just a standard computer set and a web camera as instrumentation. It has been demonstrated to be a versatile system for colorimetric and fluorescent fingerprinting. Here the omnidirectional property of fluorescent emission is utilized to separate it from the background, using a simple optical arrangement compatible with CSPT purposes. This enhances the classification capabilities and makes classification at sub-μM concentrations possible.

  • 11.
    Bakker, Jimmy W.P.
    et al.
    Linköping University, Department of Physics, Chemistry and Biology, Applied Optics . Linköping University, The Institute of Technology.
    Arwin, Hans
    Linköping University, Department of Physics, Chemistry and Biology, Applied Optics . Linköping University, The Institute of Technology.
    Lundström, Ingemar
    Linköping University, Department of Physics, Chemistry and Biology, Applied Physics . Linköping University, The Institute of Technology.
    Filippini, Daniel
    Linköping University, Department of Physics, Chemistry and Biology, Applied Physics . Linköping University, The Institute of Technology.
    Computer screen photo-assisted off-null ellipsometry2006In: Applied Optics, ISSN 1559-128X, E-ISSN 2155-3165, Vol. 45, no 30, p. 7795-7799Article in journal (Refereed)
    Abstract [en]

    The ellipsometric measurement of thickness is demonstrated using a computer screen as a light source and a webcam as a detector, adding imaging off-null ellipsometry to the range of available computer screen photoassisted techniques. The results show good qualitative agreement with a simplified theoretical model and a thickness resolution in the nanometer range is achieved. The presented model can be used to optimize the setup for sensitivity. Since the computer screen serves as a homogeneous large area illumination source, which can be tuned to different intensities for different parts of the sample, a large sensitivity range can be obtained without sacrificing thickness resolution.

  • 12.
    Bakker, Jimmy W.P.
    et al.
    Linköping University, Department of Physics, Chemistry and Biology, Applied Optics . Linköping University, The Institute of Technology.
    Arwin, Hans
    Linköping University, Department of Physics, Chemistry and Biology, Applied Optics . Linköping University, The Institute of Technology.
    Lundström, Ingemar
    Linköping University, Department of Physics, Chemistry and Biology, Applied Physics. Linköping University, The Institute of Technology.
    Filippini, Daniel
    Linköping University, Department of Physics, Chemistry and Biology, Applied Physics. Linköping University, The Institute of Technology.
    Immunodetection using computer screen photo-assisted ellipsometry2008In: Physica Status Solidi. C: Current Topics in Solid State Physics, ISSN 1862-6351, Vol. 5, no 5, p. 1431-1433Article in journal (Refereed)
    Abstract [en]

    Detection of antibody-antigen reactions is demonstrated by measuring changes in reflectance of light polarized parallel to the plane of incidence, using a computer screen as light source and a web camera as detector, giving results similar to traditional off-null ellipsometry and in accordance with a simplified theoretical model.

  • 13.
    Bakker, Jimmy W.P.
    et al.
    Linköping University, Department of Physics, Chemistry and Biology, Applied Optics . Linköping University, The Institute of Technology.
    Filippini, Daniel
    Linköping University, Department of Physics, Chemistry and Biology, Applied Physics . Linköping University, The Institute of Technology.
    Lundström, Ingemar
    Linköping University, Department of Physics, Chemistry and Biology, Applied Physics . Linköping University, The Institute of Technology.
    Two-dimensional micro array fluorescence fingerprinting with a computer screen photo-assisted technique2005In: Spectral Imaging: Instrumentation, Applications, and Analysis III, 2005, p. 9-15Conference paper (Other academic)
    Abstract [en]

    Detection and classification of fluorescent dyes are demonstrated using a computer screen photo-assisted technique (CSPT). This technique has previously been demonstrated for analyzing fluorescence from 96 wells microtiterplates (200 µl per well) and from a single cuvette with some optics to enhance sensitivity. In this work a custom designed array of wells with a volume of approximately 1 mu;l is used. In order to measure such small volumes without saturating the detector, the transmitted light is masked by placing the sample between two crossed polarizers. This arrangement blocks nearly all the transmitted light, while the emitted light, which is nearly unpolarized, can still be detected. The lowest amount (concentration x volume) of analyte detectable in this setup is about 40 times smaller than in the previous setups.

  • 14.
    Filippini, Daniel
    et al.
    Linköping University, The Institute of Technology. Linköping University, Department of Physics, Chemistry and Biology, Applied Physics .
    Bakker, Jimmy
    Linköping University, The Institute of Technology. Linköping University, Department of Physics, Chemistry and Biology, Applied Optics .
    Lundström, Ingemar
    Linköping University, The Institute of Technology. Linköping University, Department of Physics, Chemistry and Biology, Applied Physics .
    Fingerprinting of fluorescence substances for diagnostic purposes using computer screen illumination2004In: Sensors and actuators. B, Chemical, ISSN 0925-4005, E-ISSN 1873-3077, Vol. 106, p. 302-310Article in journal (Refereed)
  • 15.
    Filippini, Daniel
    et al.
    Linköping University, The Institute of Technology. Linköping University, Department of Physics, Chemistry and Biology, Applied Physics .
    Bakker, Jimmy
    Linköping University, The Institute of Technology. Linköping University, Department of Physics, Chemistry and Biology, Applied Optics .
    Lundström, Ingemar
    Linköping University, The Institute of Technology. Linköping University, Department of Physics, Chemistry and Biology, Applied Physics .
    Fingerprinting of fluorescent substances for diagnostic purposes using computer screen illumination2005In: Sensors and actuators. B, Chemical, ISSN 0925-4005, E-ISSN 1873-3077, Vol. 106, p. 302-310Article in journal (Refereed)
1 - 15 of 15
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