Synthesis of Long ZnO Nanorods under Microwave Irradiation or Conventional Heating

Research output: Contribution to journalArticle

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Abstract

The present work reports the synthesis of zinc oxide (ZnO) nanostructures produced either under microwave irradiation using low cost domestic microwave equipment or by conventional heating, both under hydrothermal conditions. X-ray diffraction, scanning electron microscopy, Fourier transform infrared spectroscopy, room/low temperature photoluminescence, and Raman spectroscopy have been used to investigate the structure, morphology, and optical properties of the produced ZnO nanorods. Identical structures with aspect ratio up to 13 have been achieved for both synthesis routes displaying similar final properties. The hexagonal wurtzite structure has been identified, and a red-orange emission has been detected in the presence of UV irradiation for all the conditions studied. Thermal stability of the as-prepared nanostructures has been evaluated through thermogravimetric measurements revealing an increase of superficial defects. The as-prepared ZnO nanorods were tested as UV sensors on paper substrate, which led to fast response (30 s) and rapid recovery (100 s) times, as well as sensitivity up to 10 indicating that these materials may have a high potential in low cost, disposable UV photodetector applications.
Original languageEnglish
Pages (from-to)14629-14639
Number of pages11
JournalJournal of Physical Chemistry C
Volume118
Issue number26
DOIs
Publication statusPublished - 3 Jul 2014

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Zinc Oxide
Microwave irradiation
Zinc oxide
Nanorods
zinc oxides
nanorods
Heating
microwaves
irradiation
heating
microwave equipment
Nanostructures
synthesis
Photoluminescence spectroscopy
Photodetectors
wurtzite
Fourier transform infrared spectroscopy
photometers
Raman spectroscopy
aspect ratio

Keywords

  • ZINC-OXIDE NANOPARTICLES
  • SENSITIZED SOLAR-CELLS
  • HYDROTHERMAL METHOD
  • OPTICAL-PROPERTIES
  • DIFFERENT SHAPES
  • NANOTUBE ARRAYS
  • LASER-ABLATION
  • GAN NANOWIRES
  • PHOTOLUMINESCENCE
  • NANOSTRUCTURES

Cite this

@article{d36eb37195e2439bb8ae93756aa096ff,
title = "Synthesis of Long ZnO Nanorods under Microwave Irradiation or Conventional Heating",
abstract = "The present work reports the synthesis of zinc oxide (ZnO) nanostructures produced either under microwave irradiation using low cost domestic microwave equipment or by conventional heating, both under hydrothermal conditions. X-ray diffraction, scanning electron microscopy, Fourier transform infrared spectroscopy, room/low temperature photoluminescence, and Raman spectroscopy have been used to investigate the structure, morphology, and optical properties of the produced ZnO nanorods. Identical structures with aspect ratio up to 13 have been achieved for both synthesis routes displaying similar final properties. The hexagonal wurtzite structure has been identified, and a red-orange emission has been detected in the presence of UV irradiation for all the conditions studied. Thermal stability of the as-prepared nanostructures has been evaluated through thermogravimetric measurements revealing an increase of superficial defects. The as-prepared ZnO nanorods were tested as UV sensors on paper substrate, which led to fast response (30 s) and rapid recovery (100 s) times, as well as sensitivity up to 10 indicating that these materials may have a high potential in low cost, disposable UV photodetector applications.",
keywords = "NANOTUBE ARRAYS, GAN NANOWIRES, OPTICAL-PROPERTIES, HYDROTHERMAL METHOD, DIFFERENT SHAPES, ZINC-OXIDE NANOPARTICLES, LASER-ABLATION, SENSITIZED SOLAR-CELLS, PHOTOLUMINESCENCE, NANOSTRUCTURES, ZINC-OXIDE NANOPARTICLES, SENSITIZED SOLAR-CELLS, HYDROTHERMAL METHOD, OPTICAL-PROPERTIES, DIFFERENT SHAPES, NANOTUBE ARRAYS, LASER-ABLATION, GAN NANOWIRES, PHOTOLUMINESCENCE, NANOSTRUCTURES",
author = "Pimentel, {Ana Cl{\'a}udia Madeira Botas Gomes} and D. Nunes and Paulo Duarte and Joana Rodrigues and Costa, {Florinda M.} and Teresa Monteiro and Martins, {Rodrigo Ferr{\~a}o de Paiva} and Fortunato, {Elvira Maria Correia}",
note = "Sem PDF. This work has been financed by the European Commission under projects INVISIBLE (FP7 ERC AdG no 228144), ORAMA CP-IP 246334-2, and APPLE (FP7-NMP-2010-SME/262782-2), and the Portuguese Science Foundation (FCT-MEC) through BPD/76992/2011 and the Projects PEst-C/CTM/LA0025/2013-14, EXCL/CTM-NAN/0201/2012, PTDC/CTM/103465/2008, PTDC/CTM-POL/1484/2012, RECI/FIS-NAN/0183/2012 (FCOMP-01-0124-FEDER-027494), PTDC/CTM-NAN/2156/2012. J. Rodrigues thanks FCT for her PhD grant, SFRH/BD/76300/2011.",
year = "2014",
month = "7",
day = "3",
doi = "10.1021/jp5027509",
language = "English",
volume = "118",
pages = "14629--14639",
journal = "Journal of Physical Chemistry C",
issn = "1932-7447",
publisher = "AMER CHEMICAL SOC",
number = "26",

}

Synthesis of Long ZnO Nanorods under Microwave Irradiation or Conventional Heating. / Pimentel, Ana Cláudia Madeira Botas Gomes; Nunes, D.; Duarte, Paulo; Rodrigues, Joana; Costa, Florinda M. ; Monteiro, Teresa; Martins, Rodrigo Ferrão de Paiva; Fortunato, Elvira Maria Correia.

In: Journal of Physical Chemistry C, Vol. 118, No. 26, 03.07.2014, p. 14629-14639.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Synthesis of Long ZnO Nanorods under Microwave Irradiation or Conventional Heating

AU - Pimentel, Ana Cláudia Madeira Botas Gomes

AU - Nunes, D.

AU - Duarte, Paulo

AU - Rodrigues, Joana

AU - Costa, Florinda M.

AU - Monteiro, Teresa

AU - Martins, Rodrigo Ferrão de Paiva

AU - Fortunato, Elvira Maria Correia

N1 - Sem PDF. This work has been financed by the European Commission under projects INVISIBLE (FP7 ERC AdG no 228144), ORAMA CP-IP 246334-2, and APPLE (FP7-NMP-2010-SME/262782-2), and the Portuguese Science Foundation (FCT-MEC) through BPD/76992/2011 and the Projects PEst-C/CTM/LA0025/2013-14, EXCL/CTM-NAN/0201/2012, PTDC/CTM/103465/2008, PTDC/CTM-POL/1484/2012, RECI/FIS-NAN/0183/2012 (FCOMP-01-0124-FEDER-027494), PTDC/CTM-NAN/2156/2012. J. Rodrigues thanks FCT for her PhD grant, SFRH/BD/76300/2011.

PY - 2014/7/3

Y1 - 2014/7/3

N2 - The present work reports the synthesis of zinc oxide (ZnO) nanostructures produced either under microwave irradiation using low cost domestic microwave equipment or by conventional heating, both under hydrothermal conditions. X-ray diffraction, scanning electron microscopy, Fourier transform infrared spectroscopy, room/low temperature photoluminescence, and Raman spectroscopy have been used to investigate the structure, morphology, and optical properties of the produced ZnO nanorods. Identical structures with aspect ratio up to 13 have been achieved for both synthesis routes displaying similar final properties. The hexagonal wurtzite structure has been identified, and a red-orange emission has been detected in the presence of UV irradiation for all the conditions studied. Thermal stability of the as-prepared nanostructures has been evaluated through thermogravimetric measurements revealing an increase of superficial defects. The as-prepared ZnO nanorods were tested as UV sensors on paper substrate, which led to fast response (30 s) and rapid recovery (100 s) times, as well as sensitivity up to 10 indicating that these materials may have a high potential in low cost, disposable UV photodetector applications.

AB - The present work reports the synthesis of zinc oxide (ZnO) nanostructures produced either under microwave irradiation using low cost domestic microwave equipment or by conventional heating, both under hydrothermal conditions. X-ray diffraction, scanning electron microscopy, Fourier transform infrared spectroscopy, room/low temperature photoluminescence, and Raman spectroscopy have been used to investigate the structure, morphology, and optical properties of the produced ZnO nanorods. Identical structures with aspect ratio up to 13 have been achieved for both synthesis routes displaying similar final properties. The hexagonal wurtzite structure has been identified, and a red-orange emission has been detected in the presence of UV irradiation for all the conditions studied. Thermal stability of the as-prepared nanostructures has been evaluated through thermogravimetric measurements revealing an increase of superficial defects. The as-prepared ZnO nanorods were tested as UV sensors on paper substrate, which led to fast response (30 s) and rapid recovery (100 s) times, as well as sensitivity up to 10 indicating that these materials may have a high potential in low cost, disposable UV photodetector applications.

KW - NANOTUBE ARRAYS

KW - GAN NANOWIRES

KW - OPTICAL-PROPERTIES

KW - HYDROTHERMAL METHOD

KW - DIFFERENT SHAPES

KW - ZINC-OXIDE NANOPARTICLES

KW - LASER-ABLATION

KW - SENSITIZED SOLAR-CELLS

KW - PHOTOLUMINESCENCE

KW - NANOSTRUCTURES

KW - ZINC-OXIDE NANOPARTICLES

KW - SENSITIZED SOLAR-CELLS

KW - HYDROTHERMAL METHOD

KW - OPTICAL-PROPERTIES

KW - DIFFERENT SHAPES

KW - NANOTUBE ARRAYS

KW - LASER-ABLATION

KW - GAN NANOWIRES

KW - PHOTOLUMINESCENCE

KW - NANOSTRUCTURES

U2 - 10.1021/jp5027509

DO - 10.1021/jp5027509

M3 - Article

VL - 118

SP - 14629

EP - 14639

JO - Journal of Physical Chemistry C

JF - Journal of Physical Chemistry C

SN - 1932-7447

IS - 26

ER -