Publication:
Highly biocompatible yogurt-derived carbon dots as multipurpose sensors for detection of formic acid vapor and metal ions

dc.contributor.authorSasaluck Moonrintaen_US
dc.contributor.authorBinhee Kwonen_US
dc.contributor.authorInsik Inen_US
dc.contributor.authorSumana Kladsomboonen_US
dc.contributor.authorWarayuth Sajomsangen_US
dc.contributor.authorPeerasak Paopraserten_US
dc.contributor.otherKorea National University of Transportationen_US
dc.contributor.otherThailand National Nanotechnology Centeren_US
dc.contributor.otherMahidol Universityen_US
dc.contributor.otherThammasat Universityen_US
dc.date.accessioned2019-08-23T10:49:50Z
dc.date.available2019-08-23T10:49:50Z
dc.date.issued2018-07-01en_US
dc.description.abstract© 2018 Elsevier B.V. Carbon dots are fascinating nanomaterials given their straightforward synthesis, unique optical properties, sensing capabilities, and biocompatibility. In this work, biocompatible carbon dots were prepared from yogurt using a two-step pyrolysis/hydrothermal method. The dots were spherical in shape with an average size of 4.7 nm. They showed blue emission under UV illumination with a quantum yield of 1.5%. Their photoluminescence was stable over three months and in both strong buffer solutions and highly concentrated salt solutions. The optical absorption and photoluminescence properties of the dots were employed for vapor and metal ion sensing, respectively. For the first time, the carbon dots were integrated into an optical electronic nose, and used for the detection of formic acid vapor at room temperature. Sensing was based on monitoring the optical transmission through a carbon dot film upon exposure to vapor, and the results were confirmed by UV–visible spectroscopy. The carbon dot-integrated electronic nose was able to distinguish vapor from formic acid/water solutions at different concentrations, with a detection limit of 7.3% v/v. The sensitivity of the dots to metal ions was tested by measuring the photoluminescence emission intensity at different excitation wavelengths. Principal component analysis was used to differentiate between the ions. The results suggested that interactions between carbon dots and metals ions occurred at a range of binding sites. The biocompability of the dots was demonstrated to be excellent. The study identified carbon dots produced from yogurt as multipurpose fluorescent nanomaterials with potential sensing and biomedical applications.en_US
dc.identifier.citationOptical Materials. Vol.81, (2018), 93-101en_US
dc.identifier.doi10.1016/j.optmat.2018.05.021en_US
dc.identifier.issn09253467en_US
dc.identifier.other2-s2.0-85047059748en_US
dc.identifier.urihttps://repository.li.mahidol.ac.th/handle/123456789/45488
dc.rightsMahidol Universityen_US
dc.rights.holderSCOPUSen_US
dc.source.urihttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85047059748&origin=inwarden_US
dc.subjectChemistryen_US
dc.subjectComputer Scienceen_US
dc.subjectEngineeringen_US
dc.subjectMaterials Scienceen_US
dc.subjectPhysics and Astronomyen_US
dc.titleHighly biocompatible yogurt-derived carbon dots as multipurpose sensors for detection of formic acid vapor and metal ionsen_US
dc.typeArticleen_US
dspace.entity.typePublication
mu.datasource.scopushttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85047059748&origin=inwarden_US

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