TY - JOUR
T1 - Enhanced green photoluminescence and dispersion of ZnO quantum dots shelled by a silica shell
AU - Pérez-Cuapio, R.
AU - Alvarado, J. Alberto
AU - Pacio, M.
AU - Arce-Plaza, A.
AU - Santoyo-Salazar, J.
AU - Liang, L. H.
AU - Sue, H. J.
N1 - Publisher Copyright:
© 2020, Springer Nature B.V.
PY - 2020/9/1
Y1 - 2020/9/1
N2 - Zinc oxide (ZnO) quantum dots (QDs) stabilized/functionalized with oleic acid and core-shelled with silicon dioxide (SiO2) are presented. A colloidal route, free surfactant was followed to synthesize ZnO QDs with an average size of 5 nm. After, the ZnO QDs were stabilized with oleic acid to avoid aggregation followed by (3-aminopropyl) trimethoxysilane functionalization. The X-ray diffraction patterns and transmission electron microscopy results indicated that the ZnO QD size and morphology did not suffer any change after functionalization. In addition, the photoluminescence measurements showed a strong green emission band related to particle size and the shell formation. Moreover, the quantum yield and z potential values were determined and the results showed an enhanced for those ZnO@SiO2 samples with 10 wt% of shell precursor. In this research, we report a high relationship between the stability and photoluminescence properties with the shell precursor concentration. Furthermore, we have developed a reliable method to obtain functionalized ZnO QDs which offer a great potential for future use as photoemission devices such as photonics, photocatalytic activities, biomedicine, optoelectronic devices, and chemical sensing. [Figure not available: see fulltext.]
AB - Zinc oxide (ZnO) quantum dots (QDs) stabilized/functionalized with oleic acid and core-shelled with silicon dioxide (SiO2) are presented. A colloidal route, free surfactant was followed to synthesize ZnO QDs with an average size of 5 nm. After, the ZnO QDs were stabilized with oleic acid to avoid aggregation followed by (3-aminopropyl) trimethoxysilane functionalization. The X-ray diffraction patterns and transmission electron microscopy results indicated that the ZnO QD size and morphology did not suffer any change after functionalization. In addition, the photoluminescence measurements showed a strong green emission band related to particle size and the shell formation. Moreover, the quantum yield and z potential values were determined and the results showed an enhanced for those ZnO@SiO2 samples with 10 wt% of shell precursor. In this research, we report a high relationship between the stability and photoluminescence properties with the shell precursor concentration. Furthermore, we have developed a reliable method to obtain functionalized ZnO QDs which offer a great potential for future use as photoemission devices such as photonics, photocatalytic activities, biomedicine, optoelectronic devices, and chemical sensing. [Figure not available: see fulltext.]
KW - Colloids
KW - Core-shell
KW - Green emission
KW - Quantum dots
KW - Stability
KW - Zinc oxide
UR - http://www.scopus.com/inward/record.url?scp=85089600898&partnerID=8YFLogxK
U2 - 10.1007/s11051-020-04985-6
DO - 10.1007/s11051-020-04985-6
M3 - Artículo
AN - SCOPUS:85089600898
SN - 1388-0764
VL - 22
JO - Journal of Nanoparticle Research
JF - Journal of Nanoparticle Research
IS - 9
M1 - 254
ER -