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BETA
Bakker, Jimmy W. P.
Alternative names
Publications (10 of 15) Show all publications
Bakker, J. W. .., Arwin, H., Lundström, I. & Filippini, D. (2008). Immunodetection using computer screen photo-assisted ellipsometry. Paper presented at 4th International Conference on Spectroscopic Ellipsometry (ICSE4), Stockholm, Sweden, 11–15 June 2007. Physica Status Solidi. C: Current Topics in Solid State Physics, 5(5), 1431-1433
Open this publication in new window or tab >>Immunodetection using computer screen photo-assisted ellipsometry
2008 (English)In: Physica Status Solidi. C: Current Topics in Solid State Physics, ISSN 1862-6351, Vol. 5, no 5, p. 1431-1433Article in journal (Refereed) Published
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.

Place, publisher, year, edition, pages
Weinheim, Germany: Wiley-VCH Verlagsgesellschaft, 2008
National Category
Natural Sciences
Identifiers
urn:nbn:se:liu:diva-42724 (URN)10.1002/pssc.200777861 (DOI)000256862500104 ()68431 (Local ID)68431 (Archive number)68431 (OAI)
Conference
4th International Conference on Spectroscopic Ellipsometry (ICSE4), Stockholm, Sweden, 11–15 June 2007
Available from: 2009-10-10 Created: 2009-10-10 Last updated: 2014-02-05Bibliographically approved
Arwin, H., Bakker, J., Lundström, I. & Filippini, D. (2006). A computer as imaging ellipsometer: biosensing at home. In: Europtrode VIII,2006.
Open this publication in new window or tab >>A computer as imaging ellipsometer: biosensing at home
2006 (English)In: Europtrode VIII,2006, 2006Conference paper, Published paper (Other academic)
National Category
Natural Sciences
Identifiers
urn:nbn:se:liu:diva-36158 (URN)30267 (Local ID)30267 (Archive number)30267 (OAI)
Available from: 2009-10-10 Created: 2009-10-10 Last updated: 2013-10-14
Bakker, J., Arwin, H., Lundström, I. & Filippini, D. (2006). Biosensor for home use: using the computer as ellipsometer.
Open this publication in new window or tab >>Biosensor for home use: using the computer as ellipsometer
2006 (English)Other (Other (popular science, discussion, etc.))
Abstract [en]

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

National Category
Natural Sciences
Identifiers
urn:nbn:se:liu:diva-36380 (URN)31212 (Local ID)31212 (Archive number)31212 (OAI)
Available from: 2009-10-10 Created: 2009-10-10 Last updated: 2013-10-14
Arwin, H., Lundström, I., Filippini, D. & Bakker, J. (2006). Computer screen photo-assisted ellipsometry. In: 4th Workshop Ellipsometry,2006.
Open this publication in new window or tab >>Computer screen photo-assisted ellipsometry
2006 (English)In: 4th Workshop Ellipsometry,2006, 2006Conference paper, Published paper (Other academic)
Abstract [en]

  

National Category
Natural Sciences
Identifiers
urn:nbn:se:liu:diva-36155 (URN)30252 (Local ID)30252 (Archive number)30252 (OAI)
Available from: 2009-10-10 Created: 2009-10-10 Last updated: 2013-10-14
Arwin, H., Bakker, J., Filippini, D. & Lundström, I. (2006). Computer screen photo-assisted measurement of intensity or polarization change of light upon interaction with a sample.
Open this publication in new window or tab >>Computer screen photo-assisted measurement of intensity or polarization change of light upon interaction with a sample
2006 (English)Patent (Other (popular science, discussion, etc.))
National Category
Natural Sciences
Identifiers
urn:nbn:se:liu:diva-36254 (URN)30746 (Local ID)30746 (Archive number)30746 (OAI)
Patent
(2006-11-03)
Available from: 2009-10-10 Created: 2009-10-10 Last updated: 2013-10-14
Bakker, J. W. .., Arwin, H., Lundström, I. & Filippini, D. (2006). Computer screen photo-assisted off-null ellipsometry. Applied Optics, 45(30), 7795-7799
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
Bakker, J. W. P. (2006). Optical Detection Using Computer Screen Photo-assisted Techniques and Ellipsometry. (Doctoral dissertation). : Institutionen för fysik, kemi och biologi
Open this publication in new window or tab >>Optical Detection Using Computer Screen Photo-assisted Techniques and Ellipsometry
2006 (English)Doctoral 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.

Place, publisher, year, edition, pages
Institutionen för fysik, kemi och biologi, 2006
Series
Linköping Studies in Science and Technology. Dissertations, ISSN 0345-7524 ; 1020
Keywords
Optical sensing, Biohttps://www.diva-portal.org/liu/webform/form.jsp#paper0sensing, Ellipsometry, Computer Screen Photo-assisted Technique, Fluorescence, Immunoassays
National Category
Atom and Molecular Physics and Optics
Identifiers
urn:nbn:se:liu:diva-6392 (URN)91-85523-70-4 (ISBN)
Public defence
2006-06-02, Planck, Fysikhuset, Campus Valla, Linköpings universitet, Linköping, 10:15 (English)
Opponent
Supervisors
Available from: 2006-05-04 Created: 2006-05-04 Last updated: 2013-10-14
Bakker, J. W. P., Filippini, D. & Lundström, I. (2005). Enhancing classification capabilities of computer screen photo-assisted fluorescence fingerprinting. Sensors and Actuators B: Chemical, 110(2), 190-194
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
Filippini, D., Bakker, J. & Lundström, I. (2005). Fingerprinting of fluorescent substances for diagnostic purposes using computer screen illumination. Sensors and actuators. B, Chemical, 106, 302-310
Open this publication in new window or tab >>Fingerprinting of fluorescent substances for diagnostic purposes using computer screen illumination
2005 (English)In: Sensors and actuators. B, Chemical, ISSN 0925-4005, E-ISSN 1873-3077, Vol. 106, p. 302-310Article in journal (Refereed) Published
National Category
Natural Sciences
Identifiers
urn:nbn:se:liu:diva-28424 (URN)13563 (Local ID)13563 (Archive number)13563 (OAI)
Available from: 2009-10-09 Created: 2009-10-09 Last updated: 2017-12-13
Bakker, J., Filippini, D. & Lundström, I. (2005). Fluorescence based sensing in a CSPT setup. In: Medicinteknikdagarna,2005.
Open this publication in new window or tab >>Fluorescence based sensing in a CSPT setup
2005 (English)In: Medicinteknikdagarna,2005, 2005Conference paper, Published paper (Other academic)
National Category
Natural Sciences
Identifiers
urn:nbn:se:liu:diva-31013 (URN)16706 (Local ID)16706 (Archive number)16706 (OAI)
Available from: 2009-10-09 Created: 2009-10-09
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