完整後設資料紀錄
DC 欄位語言
dc.contributor.authorBagheri, Zeinaben_US
dc.contributor.authorEhtesabi, Hamideen_US
dc.contributor.authorRahmandoust, Moonesen_US
dc.contributor.authorAhadian, Mohammad Mahdien_US
dc.contributor.authorHallaji, Zahraen_US
dc.contributor.authorEskandari, Farzanehen_US
dc.contributor.authorJokar, Effaten_US
dc.date.accessioned2019-04-03T06:43:40Z-
dc.date.available2019-04-03T06:43:40Z-
dc.date.issued2017-09-08en_US
dc.identifier.issn2045-2322en_US
dc.identifier.urihttp://dx.doi.org/10.1038/s41598-017-11572-8en_US
dc.identifier.urihttp://hdl.handle.net/11536/146044-
dc.description.abstractDirect pyrolysis of citric acid (CA) has been proved to be a facile bottom-up technique for making pristine carbon dots (CD) with homogenous size distribution. However, limited reports are available on systematic optimization of carbonization degree. In this investigation, pyrolysis temperatures between 160 degrees C and 220 degrees C were studied, based on CA thermal decomposition path, using various heating durations. The effect of the formation of more carbonized carbon particles (MCCPs), as the major byproduct of this method, on photoluminescence properties of CDs was also considered. The NaOH amount that neutralizes the solution and the effect of dilution on the emission intensity, were introduced as simple and accessible factors for monitoring carbonization degree, and an estimate of MCCP/ CD ratio, respectively. The results show that the CDs fabricated at 160 degrees C, 50 minutes attain almost twice higher quantum yield (QY) of 29% than highest QY reported based on pyrolysis of CA. The so-prepared CDs can be employed as excellent candidates for turn-off sensing. As a proof of concept, detection limit of 50 nM for Hg2+ was achieved using a facile and inexpensive smartphone set-up that is able to quantify and compare fluorescent intensity in several samples simultaneously.en_US
dc.language.isoen_USen_US
dc.titleNew Insight into the Concept of Carbonization Degree in Synthesis of Carbon Dots to Achieve Facile Smartphone Based Sensing Platformen_US
dc.typeArticleen_US
dc.identifier.doi10.1038/s41598-017-11572-8en_US
dc.identifier.journalSCIENTIFIC REPORTSen_US
dc.citation.volume7en_US
dc.citation.spage0en_US
dc.citation.epage0en_US
dc.contributor.department應用化學系zh_TW
dc.contributor.department應用化學系分子科學碩博班zh_TW
dc.contributor.departmentDepartment of Applied Chemistryen_US
dc.contributor.departmentInstitute of Molecular scienceen_US
dc.identifier.wosnumberWOS:000409841100075en_US
dc.citation.woscount9en_US
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