Template growth of photoconductive metal-CdSe-metal nanowires

David J. Peña; Jeremiah K.N. Mbindyo; Anthony J. Carado; Thomas E. Mallouk; Christine D. Keating; Baharak Razavi; Theresa S. Mayer

doi:10.1021/jp0256591

Template growth of photoconductive metal-CdSe-metal nanowires

David J. Peña, Jeremiah K.N. Mbindyo, Anthony J. Carado, Thomas E. Mallouk, Christine D. Keating, Baharak Razavi, Theresa S. Mayer

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

184 Scopus citations

Abstract

Metal-CdSe-metal (metal = Au, Ni) nanowires were grown by electrochemical replication of porous aluminum oxide and polycarbonate track etch membranes with pore diameters of 350 and 70 nm, respectively. The lengths of the individual segments of the nanowires were controlled by varying the amount of charge that was passed. The composition of the CdSe segments was characterized by energy-dispersive X-ray spectroscopy. A 1:1 ratio could be obtained, and Cd- and Se-rich stoichiometries were also made by adjusting the concentrations of Cd²⁺ and SeO₂ in the aqueous plating solutions. X-ray powder diffraction showed the presence of both zinc blende and wurzite phases, and grain sizes on the order of 10 nm were observed by TEM. The nanowires were resistive in the dark but showed pronounced visible light photoconductivity.

Original language	English (US)
Pages (from-to)	7458-7462
Number of pages	5
Journal	Journal of Physical Chemistry B
Volume	106
Issue number	30
DOIs	https://doi.org/10.1021/jp0256591
State	Published - Aug 1 2002

All Science Journal Classification (ASJC) codes

Physical and Theoretical Chemistry
Surfaces, Coatings and Films
Materials Chemistry

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title = "Template growth of photoconductive metal-CdSe-metal nanowires",

abstract = "Metal-CdSe-metal (metal = Au, Ni) nanowires were grown by electrochemical replication of porous aluminum oxide and polycarbonate track etch membranes with pore diameters of 350 and 70 nm, respectively. The lengths of the individual segments of the nanowires were controlled by varying the amount of charge that was passed. The composition of the CdSe segments was characterized by energy-dispersive X-ray spectroscopy. A 1:1 ratio could be obtained, and Cd- and Se-rich stoichiometries were also made by adjusting the concentrations of Cd2+ and SeO2 in the aqueous plating solutions. X-ray powder diffraction showed the presence of both zinc blende and wurzite phases, and grain sizes on the order of 10 nm were observed by TEM. The nanowires were resistive in the dark but showed pronounced visible light photoconductivity.",

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T1 - Template growth of photoconductive metal-CdSe-metal nanowires

AU - Peña, David J.

AU - Mbindyo, Jeremiah K.N.

AU - Carado, Anthony J.

AU - Mallouk, Thomas E.

AU - Keating, Christine D.

AU - Razavi, Baharak

AU - Mayer, Theresa S.

PY - 2002/8/1

Y1 - 2002/8/1

N2 - Metal-CdSe-metal (metal = Au, Ni) nanowires were grown by electrochemical replication of porous aluminum oxide and polycarbonate track etch membranes with pore diameters of 350 and 70 nm, respectively. The lengths of the individual segments of the nanowires were controlled by varying the amount of charge that was passed. The composition of the CdSe segments was characterized by energy-dispersive X-ray spectroscopy. A 1:1 ratio could be obtained, and Cd- and Se-rich stoichiometries were also made by adjusting the concentrations of Cd2+ and SeO2 in the aqueous plating solutions. X-ray powder diffraction showed the presence of both zinc blende and wurzite phases, and grain sizes on the order of 10 nm were observed by TEM. The nanowires were resistive in the dark but showed pronounced visible light photoconductivity.

AB - Metal-CdSe-metal (metal = Au, Ni) nanowires were grown by electrochemical replication of porous aluminum oxide and polycarbonate track etch membranes with pore diameters of 350 and 70 nm, respectively. The lengths of the individual segments of the nanowires were controlled by varying the amount of charge that was passed. The composition of the CdSe segments was characterized by energy-dispersive X-ray spectroscopy. A 1:1 ratio could be obtained, and Cd- and Se-rich stoichiometries were also made by adjusting the concentrations of Cd2+ and SeO2 in the aqueous plating solutions. X-ray powder diffraction showed the presence of both zinc blende and wurzite phases, and grain sizes on the order of 10 nm were observed by TEM. The nanowires were resistive in the dark but showed pronounced visible light photoconductivity.

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Template growth of photoconductive metal-CdSe-metal nanowires

Abstract

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