Synthesis of ZnO nanowires with supercritical carbon dioxide and post heat treatment

Aaretti Kaleva; Juha Pekka Nikkanen; Saara Heinonen; Ville Saarimaa; Tommi Vuorinen; Mari Honkanen; Leo Hyvarinen; Erkki Levanen

doi:10.1088/1361-6528/aada69

Synthesis of ZnO nanowires with supercritical carbon dioxide and post heat treatment

Aaretti Kaleva^*
, Juha Pekka Nikkanen
, Saara Heinonen
, Ville Saarimaa
, Tommi Vuorinen
, Mari Honkanen
, Leo Hyvarinen
, Erkki Levanen

^*Corresponding author for this work

Tampere University of Technology (TUT)
Top Analytica Oy

Research output: Contribution to journal › Article › Scientific › peer-review

7 Citations (Scopus)

Abstract

Zinc oxide (ZnO) nanowires are used in applications such as gas sensors and solar cells. This work presents a novel synthesis route for ZnO nanowires using supercritical carbon dioxide (scCO₂) and post heat treatment. The method used scCO₂ and a precursor solution as reactants to form nanowires on a galvanized surface. After the scCO₂ treatment, the substrate was heat-treated. The surfaces were characterized with SEM, TEM, EDS, FTIR, XRD and optical spectroscopy. The FTIR results showed that the surface structure had changed from zinc hydroxycarbonate to ZnO during the heat treatment. The nanowires were slightly bent due to the heat treatment according to the SEM images. The presence of ZnO was further confirmed with XRD. The bandgap of the structure was determined by reflectance measurements and showed a value of 3.23 eV. The synthesis method presented in this study offers a unique approach into the formation of ZnO nanowires in a facile, rapid and environmentally friendly process.

Original language	English
Article number	445601
Journal	Nanotechnology
Volume	29
Issue number	44
DOIs	https://doi.org/10.1088/1361-6528/aada69
Publication status	Published - 3 Sept 2018
MoE publication type	A1 Journal article-refereed

Funding

This work was supported by the Academy of Finland project: green processing of functional surface by supercritical carbon dioxide (decision no. 304782). SSAB Oy Europe is also acknowledged for their support.

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 7 Affordable and Clean Energy

Keywords

corrosion
flower-like
hot-dip galvanized
nanoflower
scCO
zinc hydroxycarbonate
zinc oxide

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10.1088/1361-6528/aada69

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title = "Synthesis of ZnO nanowires with supercritical carbon dioxide and post heat treatment",

abstract = "Zinc oxide (ZnO) nanowires are used in applications such as gas sensors and solar cells. This work presents a novel synthesis route for ZnO nanowires using supercritical carbon dioxide (scCO2) and post heat treatment. The method used scCO2 and a precursor solution as reactants to form nanowires on a galvanized surface. After the scCO2 treatment, the substrate was heat-treated. The surfaces were characterized with SEM, TEM, EDS, FTIR, XRD and optical spectroscopy. The FTIR results showed that the surface structure had changed from zinc hydroxycarbonate to ZnO during the heat treatment. The nanowires were slightly bent due to the heat treatment according to the SEM images. The presence of ZnO was further confirmed with XRD. The bandgap of the structure was determined by reflectance measurements and showed a value of 3.23 eV. The synthesis method presented in this study offers a unique approach into the formation of ZnO nanowires in a facile, rapid and environmentally friendly process.",

keywords = "corrosion, flower-like, hot-dip galvanized, nanoflower, scCO, zinc hydroxycarbonate, zinc oxide",

author = "Aaretti Kaleva and Nikkanen, \{Juha Pekka\} and Saara Heinonen and Ville Saarimaa and Tommi Vuorinen and Mari Honkanen and Leo Hyvarinen and Erkki Levanen",

year = "2018",

month = sep,

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doi = "10.1088/1361-6528/aada69",

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T1 - Synthesis of ZnO nanowires with supercritical carbon dioxide and post heat treatment

AU - Kaleva, Aaretti

AU - Nikkanen, Juha Pekka

AU - Heinonen, Saara

AU - Saarimaa, Ville

AU - Vuorinen, Tommi

AU - Honkanen, Mari

AU - Hyvarinen, Leo

AU - Levanen, Erkki

PY - 2018/9/3

Y1 - 2018/9/3

N2 - Zinc oxide (ZnO) nanowires are used in applications such as gas sensors and solar cells. This work presents a novel synthesis route for ZnO nanowires using supercritical carbon dioxide (scCO2) and post heat treatment. The method used scCO2 and a precursor solution as reactants to form nanowires on a galvanized surface. After the scCO2 treatment, the substrate was heat-treated. The surfaces were characterized with SEM, TEM, EDS, FTIR, XRD and optical spectroscopy. The FTIR results showed that the surface structure had changed from zinc hydroxycarbonate to ZnO during the heat treatment. The nanowires were slightly bent due to the heat treatment according to the SEM images. The presence of ZnO was further confirmed with XRD. The bandgap of the structure was determined by reflectance measurements and showed a value of 3.23 eV. The synthesis method presented in this study offers a unique approach into the formation of ZnO nanowires in a facile, rapid and environmentally friendly process.

AB - Zinc oxide (ZnO) nanowires are used in applications such as gas sensors and solar cells. This work presents a novel synthesis route for ZnO nanowires using supercritical carbon dioxide (scCO2) and post heat treatment. The method used scCO2 and a precursor solution as reactants to form nanowires on a galvanized surface. After the scCO2 treatment, the substrate was heat-treated. The surfaces were characterized with SEM, TEM, EDS, FTIR, XRD and optical spectroscopy. The FTIR results showed that the surface structure had changed from zinc hydroxycarbonate to ZnO during the heat treatment. The nanowires were slightly bent due to the heat treatment according to the SEM images. The presence of ZnO was further confirmed with XRD. The bandgap of the structure was determined by reflectance measurements and showed a value of 3.23 eV. The synthesis method presented in this study offers a unique approach into the formation of ZnO nanowires in a facile, rapid and environmentally friendly process.

KW - corrosion

KW - flower-like

KW - hot-dip galvanized

KW - nanoflower

KW - scCO

KW - zinc hydroxycarbonate

KW - zinc oxide

UR - https://www.scopus.com/pages/publications/85053412268

U2 - 10.1088/1361-6528/aada69

DO - 10.1088/1361-6528/aada69

M3 - Article

AN - SCOPUS:85053412268

SN - 0957-4484

VL - 29

JO - Nanotechnology

JF - Nanotechnology

IS - 44

M1 - 445601

ER -

Synthesis of ZnO nanowires with supercritical carbon dioxide and post heat treatment

Abstract

Funding

UN SDGs

Keywords

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