TY - JOUR
T1 - Solid-state thermal dewetted silver nanoparticles onto electrochemically grown self-standing vertically aligned ZnO nanorods for three-dimensional plasmonic nanostructures
AU - Badán, Juan Agustín
AU - Jauregui, Guillermo
AU - Navarrete-Astorga, Elena
AU - Henríquez, Rodrigo
AU - Jiménez, Francisco Martín
AU - Ariosa, Daniel
AU - Dalchiele, Enrique A.
N1 - Funding Information:
ZnO nanorod arrays were grown by electrochemical deposition from an aqueous precursor solution consisted of ZnAc2?2H2O (Sigma Aldrich) and 0.1 M Na2Ac (Sigma Aldrich) as supporting electrolyte to ensure a good electrical conductivity, adjusted at pH = 6.76. The growth was carried out on a conventional three electrode cell, using FTO/glass substrates with ZnO seed layers (2SL) as a working electrode, a platinum sheet (2 cm ? 4 cm) has been used as the counter electrode and a saturated calomel electrode (SCE) as the reference one. The electrolytic bath was saturated with molecular oxygen (O2) by bubbling for 40 min prior to start the electrodeposition process and maintained during the whole grown extent. Electrodeposition was carried out potentiostatically at ?1.000 V vs. SCE with an electrodeposition time of 3600 s, carried out with a Teq_04 potentiostat. After finished the electrodeposition process, the samples were thoroughly rinsed with Milli-Q water to remove any unreacted ions and finally air-dried.This work was supported by CSIC (Comisi?n Sectorial de Investigaci?n Cient?fica) of the Universidad de la Rep?blica, in Montevideo, Uruguay, PEDECIBA ? F?sica, Uruguay. The Authors are grateful to Junta de Andalucia (Spain) through the research project UMA18-FEDERJA-039. R.H. thanks the received support in the framework of DI Consolidado 039.361/2019 PUCV Project, Valpara?so, Chile.
Funding Information:
This work was supported by CSIC (Comisión Sectorial de Investigación Científica) of the Universidad de la República , in Montevideo, Uruguay, PEDECIBA – Física, Uruguay. The Authors are grateful to Junta de Andalucia (Spain) through the research project UMA18-FEDERJA-039. R.H. thanks the received support in the framework of DI Consolidado 039.361/2019 PUCV Project, Valparaíso, Chile.
Publisher Copyright:
© 2021 Elsevier Ltd and Techna Group S.r.l.
PY - 2021
Y1 - 2021
N2 - Three dimensional (3D) plasmonic nanostructures composed of silver nanoparticles decorated ZnO NRs arrays, have been fabricated by a process combining the electrochemical growth of ZnO NRs and further formation of Ag nanoparticles by the solid-state thermal dewetting (SSD) process. The effect of SSD parameters on the morphological, structural and optical properties of the Ag NPs decorated ZnO NRs arrays has been investigated. It is possible to tune the bandgap of the Ag NPs@ZnO nanorods array 3D plasmonic nanostructure by tailoring the Ag nanoparticle sizes, allowing light manipulation at the nanoscale. The silver nanoparticles attached to the ZnO NRs arrays experienced surface plasmonic coupling effect, causing enhancement in the room temperature photoluminescence (PL) UV emission and quenching the corresponding visible light one. An enhancement in the near band edge emission PL intensity of ZnO to the deep level emission PL intensity ratio after Ag NPs decoration of the ZnO nanostructures corresponding to ca. 11 folds has been observed, indicating that the defect emission is obviously suppressed.
AB - Three dimensional (3D) plasmonic nanostructures composed of silver nanoparticles decorated ZnO NRs arrays, have been fabricated by a process combining the electrochemical growth of ZnO NRs and further formation of Ag nanoparticles by the solid-state thermal dewetting (SSD) process. The effect of SSD parameters on the morphological, structural and optical properties of the Ag NPs decorated ZnO NRs arrays has been investigated. It is possible to tune the bandgap of the Ag NPs@ZnO nanorods array 3D plasmonic nanostructure by tailoring the Ag nanoparticle sizes, allowing light manipulation at the nanoscale. The silver nanoparticles attached to the ZnO NRs arrays experienced surface plasmonic coupling effect, causing enhancement in the room temperature photoluminescence (PL) UV emission and quenching the corresponding visible light one. An enhancement in the near band edge emission PL intensity of ZnO to the deep level emission PL intensity ratio after Ag NPs decoration of the ZnO nanostructures corresponding to ca. 11 folds has been observed, indicating that the defect emission is obviously suppressed.
KW - Nanoparticles
KW - Optical properties
KW - Plasmonic nanostructures
KW - Silver
KW - ZnO nanorods
UR - http://www.scopus.com/inward/record.url?scp=85112855303&partnerID=8YFLogxK
U2 - 10.1016/j.ceramint.2021.08.165
DO - 10.1016/j.ceramint.2021.08.165
M3 - Article
AN - SCOPUS:85112855303
JO - Ceramics International
JF - Ceramics International
SN - 0272-8842
ER -