Control of morphology and orientation of electrochemically grown ZnO nanorods

Tran Hoang Cao Son; Le Khac Top; Nguyen Thi Dong Tri; Ha Thuc Chi Nhan; Lam Quang Vinh; Bach Thang Phan; Sang Sub Kim; Le Van Hieu

doi:10.1007/s12540-014-2013-x

Control of morphology and orientation of electrochemically grown ZnO nanorods

Tran Hoang Cao Son, Le Khac Top, Nguyen Thi Dong Tri, Ha Thuc Chi Nhan, Lam Quang Vinh, Bach Thang Phan, Sang Sub Kim, Le Van Hieu

Vietnam National University Ho Chi Minh City

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

3 Scopus citations

Abstract

We report the direct electrochemical deposition of ZnO nanorods on an indium tin oxide substrate. The morphology and orientation of the grown ZnO nanorods were investigated as functions of the current density. It is likely that the concentrations of OH^- and Zn²⁺ ions, which could be controlled by varying the current density, determine the shape and alignment of the ZnO nanorods. The nanorods were tilted, hexagonal, and prismatic at a low current density (0.1 mA/cm²) and vertically aligned and obelisk-shaped at high current densities (greater than 0.6 mA/cm²). By using the low and high current densities sequentially in a two-step growth process, vertically aligned, hexagonal, and prismatic ZnO nanorods could be grown successfully. The underlying mechanism responsible for the growth of the ZnO nanorods is also discussed.

Original language	English
Pages (from-to)	337-342
Number of pages	6
Journal	Metals and Materials International
Volume	20
Issue number	2
DOIs	https://doi.org/10.1007/s12540-014-2013-x
State	Published - Mar 2014

Keywords

electrochemical deposition
growth mechanism
orientation
scanning electron microscopy (SEM)
ZnO nanorod

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title = "Control of morphology and orientation of electrochemically grown ZnO nanorods",

abstract = "We report the direct electrochemical deposition of ZnO nanorods on an indium tin oxide substrate. The morphology and orientation of the grown ZnO nanorods were investigated as functions of the current density. It is likely that the concentrations of OH- and Zn2+ ions, which could be controlled by varying the current density, determine the shape and alignment of the ZnO nanorods. The nanorods were tilted, hexagonal, and prismatic at a low current density (0.1 mA/cm2) and vertically aligned and obelisk-shaped at high current densities (greater than 0.6 mA/cm2). By using the low and high current densities sequentially in a two-step growth process, vertically aligned, hexagonal, and prismatic ZnO nanorods could be grown successfully. The underlying mechanism responsible for the growth of the ZnO nanorods is also discussed.",

keywords = "electrochemical deposition, growth mechanism, orientation, scanning electron microscopy (SEM), ZnO nanorod",

author = "Son, {Tran Hoang Cao} and Top, {Le Khac} and Tri, {Nguyen Thi Dong} and Nhan, {Ha Thuc Chi} and Vinh, {Lam Quang} and Phan, {Bach Thang} and Kim, {Sang Sub} and Hieu, {Le Van}",

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AU - Son, Tran Hoang Cao

AU - Top, Le Khac

AU - Tri, Nguyen Thi Dong

AU - Nhan, Ha Thuc Chi

AU - Vinh, Lam Quang

AU - Phan, Bach Thang

AU - Kim, Sang Sub

AU - Hieu, Le Van

PY - 2014/3

Y1 - 2014/3

N2 - We report the direct electrochemical deposition of ZnO nanorods on an indium tin oxide substrate. The morphology and orientation of the grown ZnO nanorods were investigated as functions of the current density. It is likely that the concentrations of OH- and Zn2+ ions, which could be controlled by varying the current density, determine the shape and alignment of the ZnO nanorods. The nanorods were tilted, hexagonal, and prismatic at a low current density (0.1 mA/cm2) and vertically aligned and obelisk-shaped at high current densities (greater than 0.6 mA/cm2). By using the low and high current densities sequentially in a two-step growth process, vertically aligned, hexagonal, and prismatic ZnO nanorods could be grown successfully. The underlying mechanism responsible for the growth of the ZnO nanorods is also discussed.

AB - We report the direct electrochemical deposition of ZnO nanorods on an indium tin oxide substrate. The morphology and orientation of the grown ZnO nanorods were investigated as functions of the current density. It is likely that the concentrations of OH- and Zn2+ ions, which could be controlled by varying the current density, determine the shape and alignment of the ZnO nanorods. The nanorods were tilted, hexagonal, and prismatic at a low current density (0.1 mA/cm2) and vertically aligned and obelisk-shaped at high current densities (greater than 0.6 mA/cm2). By using the low and high current densities sequentially in a two-step growth process, vertically aligned, hexagonal, and prismatic ZnO nanorods could be grown successfully. The underlying mechanism responsible for the growth of the ZnO nanorods is also discussed.

KW - electrochemical deposition

KW - growth mechanism

KW - orientation

KW - scanning electron microscopy (SEM)

KW - ZnO nanorod

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VL - 20

SP - 337

EP - 342

JO - Metals and Materials International

JF - Metals and Materials International

IS - 2

ER -

Control of morphology and orientation of electrochemically grown ZnO nanorods

Abstract

Keywords

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