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Bismuth Sulfide Nanoflowers for Detection of X-rays in the Mammographic Energy Range

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dc.contributor.authorYeow, John
dc.contributor.authorOsei, Ernest K
dc.contributor.authorNambiar, Shruti
dc.date.accessioned2017-02-10T20:27:21Z
dc.date.available2017-02-10T20:27:21Z
dc.date.issued2015-03-24
dc.descriptionNambiar, S., Osei, E. K., & Yeow, J. T. W. (2015). Bismuth Sulfide Nanoflowers for Detection of X-rays in the Mammographic Energy Range. Scientific Reports, 5, 9440. DOI: 10.1038/srep09440en
dc.description.abstractThe increased use of diagnostic x-rays, especially in the field of medical radiology, has necessitated a significant demand for high resolution, real-time radiation detectors. In this regard, the photoresponse of bismuth sulfide (Bi2S3), an n-type semiconducting metal chalcogenide, to low energy x-rays has been investigated in this study. In recent years, several types of nanomaterials of Bi2S3 have been widely studied for optoelectronic and thermoelectric applications. However, photoresponse of Bi2S3 nanomaterials for dosimetric applications has not yet been reported. The photosensitivity of Bi2S3 with nanoscale “flower-like” structures was characterized under x-ray tube-potentials typically used in mammographic procedures. Both dark current and photocurrent were measured under varying x-ray doses, field sizes, and bias voltages for each of the tube potentials – 20, 23, 26 and 30 kV. Results show that the Bi2S3 nanoflowers instantaneously responded to even minor changes in the dose delivered. The photoresponse was found to be relatively high (few nA) at bias voltage as low as +1 V, and fairly repeatable for both short and long exposures to mammographic x-rays with minimal or no loss in sensitivity. The overall dose-sensitivity of the Bi2S3 nanoflowers was found to be similar to that of a micro-ionization chamber.en
dc.description.sponsorshipThis project was funded by the Waterloo Institute for Nanotechnology (University of Waterloo, Canada) as part of a collaboration program with Prof. C.N.R. Rao's laboratory at the Jawaharlal Nehru Centre for Advanced Scientific Research (JNCASR, Bangalore, India).en
dc.identifier.urihttp://dx.doi.org/10.1038/srep09440
dc.identifier.urihttp://hdl.handle.net/10012/11307
dc.language.isoenen
dc.publisherNatureen
dc.relation.ispartofseriesScientific Reports;5en
dc.rightsAttribution 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/*
dc.subjectBiomedical engineeringen
dc.subjectSensors and biosensorsen
dc.titleBismuth Sulfide Nanoflowers for Detection of X-rays in the Mammographic Energy Rangeen
dc.typeArticleen
dcterms.bibliographicCitationNambiar, S., Osei, E. K., & Yeow, J. T. W. (2015). Bismuth Sulfide Nanoflowers for Detection of X-rays in the Mammographic Energy Range. Scientific Reports, 5, 9440.en
uws.contributor.affiliation1Faculty of Engineeringen
uws.contributor.affiliation2Systems Design Engineeringen
uws.peerReviewStatusRevieweden
uws.scholarLevelFacultyen
uws.typeOfResourceTexten

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