Abstracts Book - IMRC 2018

• SE3-P011
SYNTHESIS, CHARACTERIZATION AND THERMOLUMINESCENCE
RESPONSE OF QUANTUM DOTS OF GRAPHITIC CARBON NITRIDE
(g C3N4)
Mario Cesar Pérez Chávez 1 , Miguel Ángel Vallejo Hernández 1 , Christian Gómez Solís 1 , Pablo
Victor Ceron 1 , Modesto Sosa 1
1 Universidad de Guanajuato campus León, Física Médica, Mexico.
Quantum dots (QD) are very small semiconductor particles, only several
nanometers in size, so small that their optical and electronic properties differ those
of larger particles. Many types of quantum dot will emit light of specific frequencies
if electricity or light is applied to them, and these frequencies can be precisely tuned
by changing the dots’size, shape and material, giving rise to many applications. In
the present work we present the synthesis for the obtaining of quantum dots the
Graphitic Carbon Nitride(g C3N4), this is a family of carbon nitride compounds
with a general formula near to C3N4 (albeit typically with non-zero amounts of
Hydrogen).
Graphitic
carbon nitride can be prepared by a heat treatment of the Urea, also known as
carbamide. Urea is an organic compound with chemical formula CO(NH2)2 and
have an important role in the metabolism of nitrogen-containing compounds by
animals and is the main nitrogen-containing substance in the urine of mammals. It
is a colorless, odorless solid, highly soluble in water, and practically non-toxic. We
prepared the quantum dots with a Hydrothermal synthesis: can be defined as
a method of synthesis of single crystals that depends on the solubility of materials
in hot water under high pressure. The crystal growth is performed in an apparatus
consisting of a steel pressure vessel called an autoclave. A morphological
characterization was made with X-ray diffraction and SEM(Scanning Electron
Microscopy) to our material (g C3N4), to reveal information about the crystal
structure and chemical composition, before during and after the process.We also
proceeded to investigate the Photoluminescence properties of g C3N4 quantum
dots, which when excited
with a wavelength λ= 366 nm we obtain a blue emission, also we made a UV-Vis
characterization in order to observe the absorption band of the carbon nitride. The
thermoluminescent response is also reported of this quantum dots in order to use
it as an application in clinical dosimetry.
Keywords: Quantum Dots, Dosimetry, Photoluminescence
Presenting authors email: vegeto@fisica.ugto.mx