Counting molecules with a mobile phone camera using plasmonic enhancement

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dc.citation.epage26en_US
dc.citation.issueNumber1en_US
dc.citation.spage17en_US
dc.citation.volumeNumber1en_US
dc.contributor.authorAyas S.en_US
dc.contributor.authorCupallari, A.en_US
dc.contributor.authorEkiz, O. O.en_US
dc.contributor.authorKaya, Y.en_US
dc.contributor.authorDana, A.en_US
dc.date.accessioned2016-02-08T10:58:51Z
dc.date.available2016-02-08T10:58:51Z
dc.date.issued2014en_US
dc.departmentDepartment of Electrical and Electronics Engineeringen_US
dc.description.abstractPlasmonic field enhancement enables the acquisition of Raman spectra at a single molecule level. Here we investigate the detection of surface enhanced Raman signal using the unmodified image sensor of a smart phone, integrated onto a confocal Raman system. The sensitivity of a contemporary smart phone camera is compared to a photomultiplier and a cooled charge-coupled device. The camera displays a remarkably high sensitivity, enabling the observation of the weak unenhanced Raman scattering signal from a silicon surface, as well as from liquids, such as ethanol. Using high performance wide area plasmonic substrates that enhance the Raman signal 106 to 107 times, blink events typically associated with single molecule motion, are observed on the smart phone camera. Raman spectra can also be collected on the smart phone by converting the camera into a low resolution spectrometer with the inclusion of a collimator and a dispersive optical element in front of the camera. In this way, spectral content of the blink events can be observed on the plasmonic substrate, in real time, at 30 frames per second. (Figure Presented) © 2013 American Chemical Society.en_US
dc.identifier.doi10.1021/ph400108pen_US
dc.identifier.issn2330-4022
dc.identifier.urihttp://hdl.handle.net/11693/26364
dc.language.isoEnglishen_US
dc.publisherAmerican Chemical Societyen_US
dc.relation.isversionofhttp://dx.doi.org/10.1021/ph400108pen_US
dc.source.titleACS Photonicsen_US
dc.titleCounting molecules with a mobile phone camera using plasmonic enhancementen_US
dc.typeArticleen_US

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