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Towards integrated devices for computer screen photo-assisted multi-parameter sensing
Linköping University, Department of Physics, Chemistry and Biology, Applied Physics. Linköping University, Faculty of Science & Engineering.
University Roma Tor Vergata, Italy.
University Roma Tor Vergata, Italy.
University Roma Tor Vergata, Italy.
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2009 (English)In: Analytica Chimica Acta, ISSN 0003-2670, E-ISSN 1873-4324, Vol. 632, no 1, 143-147 p.Article in journal (Refereed) Published
Abstract [en]

The computer screen photo-assisted technique (CSPT) utilizes consumer electronic devices such as computer screens and web cameras for distributed chemical sensing. Key to this method is the development of small and disposable sensing assays able to aid the CSPT optical detection, and the evaluation of multiple indicators. Here we demonstrate CSPT identification of fluorescent indicators from individual 100 mu m SU-8 (10) pillars covering an area of 4 mm x 4 mm with a density of 47 elements mm-2. The extraction of distinctive spectral fingerprints is aided by the exploitation of a three-band Moire interference that enables the partial Bayer decoding of the CSPT images.

Place, publisher, year, edition, pages
2009. Vol. 632, no 1, 143-147 p.
Keyword [en]
Optical sensor, SU-8, Microstructures, Moire
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:liu:diva-16633DOI: 10.1016/j.aca.2008.10.076OAI: oai:DiVA.org:liu-16633DiVA: diva2:159545
Available from: 2009-02-08 Created: 2009-02-06 Last updated: 2015-06-01Bibliographically approved
In thesis
1. Integrated Optical Solutions for Ubiquitous Sensing
Open this publication in new window or tab >>Integrated Optical Solutions for Ubiquitous Sensing
2010 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Ubiquitous chemical sensing aims at exploiting consumer electronic devices as temporary chemical sensing platforms. These devices are a highly disseminated infrastructure, not presently being exploited for chemical sensing purposes. The goal of the ubiquitous chemical sensing field is to create the methodologies and adapted devices to profit from this unexploited resource.

DVD drives, flat bed scanners and computer screens used in combination with web cameras, and mobile phones have been demonstrated as measuring platforms, during the past 10 years.

In particular the combination of computer screens with web cameras, a technique called the computer screen photo-assisted technique (CSPT), is the most versatile approach to support multiple types of optical detection phenomena, and together with mobile phones are the most ubiquitous type of platforms.

The versatility of CSPT comes from the ease with which one can configure a spectrally controlled, 2D micro-positioned, linearly polarized, wide angle and internally modulated illumination with a programmable screen, just by controlling the displayed contents. Concurrently, the imaging devices in CSPT enable one to capture arbitrary assay layouts, the evaluation of which can then be numerically customized.

The full exploitation of the CSPT platform requires optically adapted sensing interfaces and specialized methods, in order to increase sensitivity and make use of all available information, for a thorough and complete chemical sensing analysis. In this thesis I have explored the foundations of CSPT sensing on integrated devices, developing methods and sensing’s interfaces that provide enhanced optical detection customized to the CSPT platform.

Place, publisher, year, edition, pages
Linköping: Linköping University Electronic Press, 2010. 63 p.
Series
Linköping Studies in Science and Technology. Dissertations, ISSN 0345-7524 ; 1355
National Category
Natural Sciences
Identifiers
urn:nbn:se:liu:diva-63709 (URN)978-91-7393-269-1 (ISBN)
Public defence
2010-12-15, Plank, E-huset, Campus Valla, Linköpings universitet, Linköping, 10:15 (English)
Opponent
Supervisors
Available from: 2010-12-30 Created: 2010-12-30 Last updated: 2011-01-03Bibliographically approved

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Macken, StephenLundström, IngemarFilippini, Daniel

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