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      Structural, optical, electrical and electrocatalytic activity properties of luminescent organic carbon quantum dots

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      Embargo Lift Date: 2019-05-08
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      Author(s)
      Karatutlu, Ali
      Patil, Bhushan
      Şeker, İ.
      İstengir, S.
      Bolat, A.
      Yıldırım, O.
      Sevgen, Y. N.
      Bakış, Y.
      Ortaç, Bülend
      Yılmaz, Eda
      Sapelkin, A.
      Date
      2018
      Source Title
      ChemistrySelect
      Print ISSN
      2365-6549
      Publisher
      Wiley-Blackwell
      Volume
      3
      Issue
      17
      Pages
      4730 - 4737
      Language
      English
      Type
      Article
      Item Usage Stats
      136
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      118
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      Abstract
      Carbon is an essential element in human life and recently becoming technologically prominent due to the emerging field of “Carbononics”. We demonstrate organic carbon quantum dots (qdots) containing nitrile bonded (C≡N bond) d-glucose-like traces in various sizes obtained from wheat flour to be promising for imaging applications and to possess a relaxor ferroelectric property and an enhanced electrocatalytic activity that could reduce the cost of energy devices and simple to scale up for the commercialization. The secondary electron microscopy (SEM) imaging shows that the particle size of carbon qdots can be controlled via the sonication exposure time. Elemental analysis and vibrational spectroscopy results show that carbon qdots are sensitive to N2 gas in the atmosphere and could weaken its “carbogenic” property by making a stable C≡N bond at ambient atmosphere. Rietveld analysis and HR-TEM studies demonstrate that the structure of the C qdots was found to fit best with an acentric primitive orthorhombic lattice. The laser scanning confocal microscopy (LSCM) images show enhancement of the light emission when reducing the size and characteristic excitation wavelength-dependent light emission of C qdots. The photoluminescence and UV-Vis absorption spectroscopy techniques show surface dominant emission and absorption upon the nitrile bonding.
      Keywords
      Carbon
      Catalytic activity
      Ferroelectric
      Organic
      Quantum dots
      Permalink
      http://hdl.handle.net/11693/50062
      Published Version (Please cite this version)
      https://doi.org/10.1002/slct.201800714
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      • Institute of Materials Science and Nanotechnology (UNAM) 1930
      • Nanotechnology Research Center (NANOTAM) 1063
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