Short-circuit diffusion growth of long bi-crystal CuO nanowires

Benjamin J. Hansen; Hoi-lam Iris Chan; Jian LU; Ganhua Lu; Junhong Chen

doi:10.1016/j.cplett.2011.01.040

Short-circuit diffusion growth of long bi-crystal CuO nanowires

Benjamin J. Hansen
, Hoi-lam Iris Chan
, Jian LU
, Ganhua Lu
, Junhong Chen^*

^*Corresponding author for this work

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

37 Citations (Scopus)

Abstract

The growth of CuO nanowires (NWs) through direct oxidation of copper is widely utilized. We give further evidence of a short-circuit, grain boundary diffusion mechanism. First, we show enhanced CuO NW growth through oxidizing nanocrystalline Cu. Second, we show the presence of a bi-crystal structure with a Cu rich (1 1 -2)/(0 0 -1) boundary along the entire length of the NW. Our analysis suggests that the growth of CuO NWs occurs via the short-circuit diffusion of Cu ions across the Cu₂O layer, followed by short-circuit diffusion along the CuO NW bi-crystal grain boundary and to the NW tip, where subsequent oxidation occurs.

Original language	English
Pages (from-to)	41-45
Journal	Chemical Physics Letters
Volume	504
Issue number	1-3
Online published	18 Jan 2011
DOIs	https://doi.org/10.1016/j.cplett.2011.01.040
Publication status	Published - 28 Feb 2011

Funding

The authors would like to thank Dr. Yong Ding for his technical expertise and assistance with the TEM work. This work was financially supported by the National Science Foundation through an IREE supplemental grant of CMMI-0609059 and the Hong Kong Polytechnic University funds for niche areas under grant No. BB90. BJH was supported by a National Science Foundation Graduate Research Fellowship.

Research Keywords

MECHANICAL ATTRITION TREATMENT
COPPER-OXIDE
OXIDATION
SURFACE
SCALE
KINETICS
FILMS
ARRAY
AIR

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title = "Short-circuit diffusion growth of long bi-crystal CuO nanowires",

abstract = "The growth of CuO nanowires (NWs) through direct oxidation of copper is widely utilized. We give further evidence of a short-circuit, grain boundary diffusion mechanism. First, we show enhanced CuO NW growth through oxidizing nanocrystalline Cu. Second, we show the presence of a bi-crystal structure with a Cu rich (1 1 -2)/(0 0 -1) boundary along the entire length of the NW. Our analysis suggests that the growth of CuO NWs occurs via the short-circuit diffusion of Cu ions across the Cu2O layer, followed by short-circuit diffusion along the CuO NW bi-crystal grain boundary and to the NW tip, where subsequent oxidation occurs.",

keywords = "MECHANICAL ATTRITION TREATMENT, COPPER-OXIDE, OXIDATION, SURFACE, SCALE, KINETICS, FILMS, ARRAY, AIR",

author = "Hansen, \{Benjamin J.\} and Chan, \{Hoi-lam Iris\} and Jian LU and Ganhua Lu and Junhong Chen",

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T1 - Short-circuit diffusion growth of long bi-crystal CuO nanowires

AU - Hansen, Benjamin J.

AU - Chan, Hoi-lam Iris

AU - LU, Jian

AU - Lu, Ganhua

AU - Chen, Junhong

PY - 2011/2/28

Y1 - 2011/2/28

N2 - The growth of CuO nanowires (NWs) through direct oxidation of copper is widely utilized. We give further evidence of a short-circuit, grain boundary diffusion mechanism. First, we show enhanced CuO NW growth through oxidizing nanocrystalline Cu. Second, we show the presence of a bi-crystal structure with a Cu rich (1 1 -2)/(0 0 -1) boundary along the entire length of the NW. Our analysis suggests that the growth of CuO NWs occurs via the short-circuit diffusion of Cu ions across the Cu2O layer, followed by short-circuit diffusion along the CuO NW bi-crystal grain boundary and to the NW tip, where subsequent oxidation occurs.

AB - The growth of CuO nanowires (NWs) through direct oxidation of copper is widely utilized. We give further evidence of a short-circuit, grain boundary diffusion mechanism. First, we show enhanced CuO NW growth through oxidizing nanocrystalline Cu. Second, we show the presence of a bi-crystal structure with a Cu rich (1 1 -2)/(0 0 -1) boundary along the entire length of the NW. Our analysis suggests that the growth of CuO NWs occurs via the short-circuit diffusion of Cu ions across the Cu2O layer, followed by short-circuit diffusion along the CuO NW bi-crystal grain boundary and to the NW tip, where subsequent oxidation occurs.

KW - MECHANICAL ATTRITION TREATMENT

KW - COPPER-OXIDE

KW - OXIDATION

KW - SURFACE

KW - SCALE

KW - KINETICS

KW - FILMS

KW - ARRAY

KW - AIR

UR - https://www.scopus.com/pages/publications/79952007171

UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-79952007171&origin=recordpage

U2 - 10.1016/j.cplett.2011.01.040

DO - 10.1016/j.cplett.2011.01.040

M3 - RGC 21 - Publication in refereed journal

SN - 0009-2614

VL - 504

SP - 41

EP - 45

JO - Chemical Physics Letters

JF - Chemical Physics Letters

IS - 1-3

ER -

Short-circuit diffusion growth of long bi-crystal CuO nanowires

Abstract

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Research Keywords

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