The kinetics of the hydrothermal growth of ZnO nanostructures

Michael N.R. Ashfold; Rachel P. Doherty; N. George Ndifor-Angwafor; D. Jason Riley; Ye Sun

doi:10.1016/j.tsf.2007.03.122

The kinetics of the hydrothermal growth of ZnO nanostructures

Michael N.R. Ashfold
, Rachel P. Doherty
, N. George Ndifor-Angwafor
, D. Jason Riley^*
, Ye Sun

^*Corresponding author for this work

University of Bristol

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

199 Scopus citations

Abstract

The immersion of a material, seeded with ZnO nanoparticles, in an aqueous solution of Zn(NO₃)₂ and hexamethylenetetramine (HMT) at 90 °C yields an extended array of one-dimensional ZnO on the substrate surface. The structure of the ZnO evolves with reaction time. Initially nanorods are formed. At longer times the rods are tipped with nanotubes. Here we report a series of experiments in which both the composition of the reaction solution; concentrations of H⁺, Zn²⁺ and HMT; and the structure of ZnO deposited on the substrate are monitored as a function of reaction time. It was found that the change from ZnO rod to tube growth arises when the solution composition is such that it is no longer thermodynamically favorable to precipitate Zn(OH)₂.

Original language	English
Pages (from-to)	8679-8683
Number of pages	5
Journal	Thin Solid Films
Volume	515
Issue number	24 SPEC. ISS.
DOIs	https://doi.org/10.1016/j.tsf.2007.03.122
State	Published - 15 Oct 2007
Externally published	Yes

Keywords

Hydrothermal growth
Nanorods
Nanotubes
Zinc oxide

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10.1016/j.tsf.2007.03.122

Cite this

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title = "The kinetics of the hydrothermal growth of ZnO nanostructures",

abstract = "The immersion of a material, seeded with ZnO nanoparticles, in an aqueous solution of Zn(NO3)2 and hexamethylenetetramine (HMT) at 90 °C yields an extended array of one-dimensional ZnO on the substrate surface. The structure of the ZnO evolves with reaction time. Initially nanorods are formed. At longer times the rods are tipped with nanotubes. Here we report a series of experiments in which both the composition of the reaction solution; concentrations of H+, Zn2+ and HMT; and the structure of ZnO deposited on the substrate are monitored as a function of reaction time. It was found that the change from ZnO rod to tube growth arises when the solution composition is such that it is no longer thermodynamically favorable to precipitate Zn(OH)2.",

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year = "2007",

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doi = "10.1016/j.tsf.2007.03.122",

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TY - JOUR

T1 - The kinetics of the hydrothermal growth of ZnO nanostructures

AU - Ashfold, Michael N.R.

AU - Doherty, Rachel P.

AU - Ndifor-Angwafor, N. George

AU - Riley, D. Jason

AU - Sun, Ye

PY - 2007/10/15

Y1 - 2007/10/15

N2 - The immersion of a material, seeded with ZnO nanoparticles, in an aqueous solution of Zn(NO3)2 and hexamethylenetetramine (HMT) at 90 °C yields an extended array of one-dimensional ZnO on the substrate surface. The structure of the ZnO evolves with reaction time. Initially nanorods are formed. At longer times the rods are tipped with nanotubes. Here we report a series of experiments in which both the composition of the reaction solution; concentrations of H+, Zn2+ and HMT; and the structure of ZnO deposited on the substrate are monitored as a function of reaction time. It was found that the change from ZnO rod to tube growth arises when the solution composition is such that it is no longer thermodynamically favorable to precipitate Zn(OH)2.

AB - The immersion of a material, seeded with ZnO nanoparticles, in an aqueous solution of Zn(NO3)2 and hexamethylenetetramine (HMT) at 90 °C yields an extended array of one-dimensional ZnO on the substrate surface. The structure of the ZnO evolves with reaction time. Initially nanorods are formed. At longer times the rods are tipped with nanotubes. Here we report a series of experiments in which both the composition of the reaction solution; concentrations of H+, Zn2+ and HMT; and the structure of ZnO deposited on the substrate are monitored as a function of reaction time. It was found that the change from ZnO rod to tube growth arises when the solution composition is such that it is no longer thermodynamically favorable to precipitate Zn(OH)2.

KW - Hydrothermal growth

KW - Nanorods

KW - Nanotubes

KW - Zinc oxide

UR - https://www.scopus.com/pages/publications/34548841099

U2 - 10.1016/j.tsf.2007.03.122

DO - 10.1016/j.tsf.2007.03.122

M3 - 文章

AN - SCOPUS:34548841099

SN - 0040-6090

VL - 515

SP - 8679

EP - 8683

JO - Thin Solid Films

JF - Thin Solid Films

IS - 24 SPEC. ISS.

ER -

The kinetics of the hydrothermal growth of ZnO nanostructures

Abstract

Keywords

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