Microwave synthesized ZnO nanorod arrays for UV sensors

A seed layer annealing temperature study

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Abstract

The present work reports the influence of zinc oxide (ZnO) seed layer annealing temperature on structural, optical and electrical properties of ZnO nanorod arrays, synthesized by hydrothermal method assisted by microwave radiation, to be used as UV sensors. The ZnO seed layer was produced using the spin-coating method and several annealing temperatures, ranging from 100 to 500 °C, have been tested. X-ray diffraction (XRD), scanning electron microscopy (SEM), atomic force microscopy (AFM) and spectrophotometry measurements have been used to investigate the structure, morphology, and optical properties variations of the produced ZnO nanorod arrays regarding the seed layer annealing temperatures employed. After the growth of ZnO nanorod arrays, the whole structure was tested as UV sensors, showing an increase in the sensitivity with the increase of seed layer annealing temperature. The UV sensor response of ZnO nanorod arrays produced with the seed layer annealed temperature of 500 °C was 50 times superior to the ones produced with a seed layer annealed at 100 °C.

Original languageEnglish
Article number299
JournalMaterials
Volume9
Issue number4
DOIs
Publication statusPublished - 2016

Fingerprint

Zinc Oxide
Zinc oxide
Nanorods
Seed
Microwaves
Annealing
Sensors
Temperature
Optical properties
Spectrophotometry
Spin coating
Structural properties
Atomic force microscopy
Electric properties
X ray diffraction
Scanning electron microscopy

Keywords

  • Hydrothermal synthesis
  • Microwave
  • Spin-coating
  • UV sensors
  • ZnO nanostructures

Cite this

@article{88c5847cea544ae89b23d45e6ae31b53,
title = "Microwave synthesized ZnO nanorod arrays for UV sensors: A seed layer annealing temperature study",
abstract = "The present work reports the influence of zinc oxide (ZnO) seed layer annealing temperature on structural, optical and electrical properties of ZnO nanorod arrays, synthesized by hydrothermal method assisted by microwave radiation, to be used as UV sensors. The ZnO seed layer was produced using the spin-coating method and several annealing temperatures, ranging from 100 to 500 °C, have been tested. X-ray diffraction (XRD), scanning electron microscopy (SEM), atomic force microscopy (AFM) and spectrophotometry measurements have been used to investigate the structure, morphology, and optical properties variations of the produced ZnO nanorod arrays regarding the seed layer annealing temperatures employed. After the growth of ZnO nanorod arrays, the whole structure was tested as UV sensors, showing an increase in the sensitivity with the increase of seed layer annealing temperature. The UV sensor response of ZnO nanorod arrays produced with the seed layer annealed temperature of 500 °C was 50 times superior to the ones produced with a seed layer annealed at 100 °C.",
keywords = "Hydrothermal synthesis, Microwave, Spin-coating, UV sensors, ZnO nanostructures",
author = "Pimentel, {Ana Cl{\'a}udia Madeira Botas Gomes} and Ferreira, {Sofia Henriques} and Gomes, {Daniela da Silva Nunes} and Calmeiro, {Tom{\'a}s R.} and Rodrigo Martins and Elvira Fortunato",
note = "This work was partially financed by FEDER funds through the COMPETE 2020 Programme and National Funds through FCT (Portuguese Foundation for Science and Technology) through BPD/76992/2011 and under the projects UID/CTM/50025/2013 and EXCL/CTM-NAN/0201/2012. Sofia Henriques Ferreira acknowledges the support from the Portuguese Foundation for Science and Technology through the AdvaMTech PhD program scholarship PD/BD/114086/2015.",
year = "2016",
doi = "10.3390/ma9040299",
language = "English",
volume = "9",
journal = "Materials",
issn = "1996-1944",
publisher = "Molecular Diversity Preservation International (MDPI)",
number = "4",

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TY - JOUR

T1 - Microwave synthesized ZnO nanorod arrays for UV sensors

T2 - A seed layer annealing temperature study

AU - Pimentel, Ana Cláudia Madeira Botas Gomes

AU - Ferreira, Sofia Henriques

AU - Gomes, Daniela da Silva Nunes

AU - Calmeiro, Tomás R.

AU - Martins, Rodrigo

AU - Fortunato, Elvira

N1 - This work was partially financed by FEDER funds through the COMPETE 2020 Programme and National Funds through FCT (Portuguese Foundation for Science and Technology) through BPD/76992/2011 and under the projects UID/CTM/50025/2013 and EXCL/CTM-NAN/0201/2012. Sofia Henriques Ferreira acknowledges the support from the Portuguese Foundation for Science and Technology through the AdvaMTech PhD program scholarship PD/BD/114086/2015.

PY - 2016

Y1 - 2016

N2 - The present work reports the influence of zinc oxide (ZnO) seed layer annealing temperature on structural, optical and electrical properties of ZnO nanorod arrays, synthesized by hydrothermal method assisted by microwave radiation, to be used as UV sensors. The ZnO seed layer was produced using the spin-coating method and several annealing temperatures, ranging from 100 to 500 °C, have been tested. X-ray diffraction (XRD), scanning electron microscopy (SEM), atomic force microscopy (AFM) and spectrophotometry measurements have been used to investigate the structure, morphology, and optical properties variations of the produced ZnO nanorod arrays regarding the seed layer annealing temperatures employed. After the growth of ZnO nanorod arrays, the whole structure was tested as UV sensors, showing an increase in the sensitivity with the increase of seed layer annealing temperature. The UV sensor response of ZnO nanorod arrays produced with the seed layer annealed temperature of 500 °C was 50 times superior to the ones produced with a seed layer annealed at 100 °C.

AB - The present work reports the influence of zinc oxide (ZnO) seed layer annealing temperature on structural, optical and electrical properties of ZnO nanorod arrays, synthesized by hydrothermal method assisted by microwave radiation, to be used as UV sensors. The ZnO seed layer was produced using the spin-coating method and several annealing temperatures, ranging from 100 to 500 °C, have been tested. X-ray diffraction (XRD), scanning electron microscopy (SEM), atomic force microscopy (AFM) and spectrophotometry measurements have been used to investigate the structure, morphology, and optical properties variations of the produced ZnO nanorod arrays regarding the seed layer annealing temperatures employed. After the growth of ZnO nanorod arrays, the whole structure was tested as UV sensors, showing an increase in the sensitivity with the increase of seed layer annealing temperature. The UV sensor response of ZnO nanorod arrays produced with the seed layer annealed temperature of 500 °C was 50 times superior to the ones produced with a seed layer annealed at 100 °C.

KW - Hydrothermal synthesis

KW - Microwave

KW - Spin-coating

KW - UV sensors

KW - ZnO nanostructures

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JO - Materials

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