Controlled size and high stability SiO2@ZnO QD’s with high green emission obtained by a simple colloidal route

Rene Perez Cuapio; Jose Alberto A.G Alvarado Garcia; Mauricio Pacio Castillo; Antonio Arce Plaza; Carlos Bueno Avendaño; Héctor Juárez Santiesteban; Hung-Jue Sue

doi:10.3762/bxiv.2019.32.v1

Controlled size and high stability SiO₂@ZnO QD’s with high green emission obtained by a simple colloidal route

Rene Perez Cuapio ,
Jose Alberto A.G Alvarado Garcia ,
Mauricio Pacio Castillo ,
Antonio Arce Plaza ,
Carlos Bueno Avendaño ,
Héctor Juárez Santiesteban and
Hung-Jue Sue

Submitting author affiliation:

benemerita Universidad Autonoma de Puebla, Puebla, Mexico

Beilstein Arch. 2019, 201932. https://doi.org/10.3762/bxiv.2019.32.v1

Published 29 May 2019

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Show All Preprints Nanotechnology Organic chemistry Bioorganic chemistry / chemical biology Catalysis Chemical methods and reactions Flow and process chemistry Green and sustainable chemistry Materials chemistry Medicinal and pharmaceutical chemistry Nano- and molecular-scale electronics Nano-biomaterials and bioscience Nanomagnetics Nanomaterials, thin films and nanointerfaces Nanomedicine Nanometrology and nanomechanics Nano-optics Nanopatterning, self-assembly and nanofabrication Nanostructures for energy and sensing applications Natural products chemistry Organo main group chemistry Other nanotechnology (unclassified) Other organic chemistry (unclassified) Photochemistry and photovoltaics Physical organic chemistry Supramolecular chemistry

Abstract

In this work the synthesis of visible ZnO quantum dots (QDs) functionalized/stabilized with oleic acid and core-shelled with SiO₂ is presented. A colloidal route was followed to synthesize ZnO QDs with 5 nm average size. Several characterizations were done to identify and assure the core, the stabilization, grain size and QDs emission characteristics. Techniques like FT-IR, XRD, TEM, SEM, UV-Vis, PL and an UV lamp were used to test composition, structural, morphological and emission of the as obtained quantum dots. After the structural and morphological characterization of the particles, they were functionalized with (3-aminopropyl) trimethoxysilane (APTMS). It was observed that the size and morphology are unchanged but the stability depends directly on the APTMS oversaturation which is due to the formation of a thick SiO₂ layer. From the PL characterization results it was noticed that the strong green emission is related to the APTMS content and directly related to the shell formation, this emission decreases as the core-shell thickness increases.

Keywords: Zinc Oxide, Quantum dots, core-shell, stabilization, green emission.

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When a peer-reviewed version of this preprint is available, this information will be updated in the information box above. If no peer-reviewed version is available, please cite this preprint using the following information:

Perez Cuapio, R.; Alvarado Garcia, J. A. A.; Pacio Castillo, M.; Arce Plaza, A.; Bueno Avendaño, C.; Juárez Santiesteban, H.; Sue, H.-J. Beilstein Arch. 2019, 201932. doi:10.3762/bxiv.2019.32.v1

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© 2019 Perez Cuapio et al.; licensee Beilstein-Institut.
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aromatic	the word “aromatic”
aromatic aldehyde	the word “aromatic” OR “aldehyde”
+aromatic +aldehyde	both words “aromatic” AND “aldehyde”
+aromatic -aldehyde	the word “aromatic” but NOT “aldehyde”
“aromatic aldehyde”	the exact phrase “aromatic aldehyde”
benz*	words which begin with “benz”, such as “benzene” or “benzyl”
benz*yl	words that begin with “benz” and end with “yl”, such as “benzyl” or “benzoyl”
benzyl~	words that are close to the word “benzyl”, such as “benzoyl” (i.e., fuzzy search)