Transition from zero-dimensional to one-dimensional behavior in InAs and CdSe nanorods

Oded Millo; Dov Steiner; David Katz; Assaf Aharoni; Shihai Kan; Taleb Mokari; Uri Banin

doi:10.1016/j.physe.2004.08.062

Transition from zero-dimensional to one-dimensional behavior in InAs and CdSe nanorods

Oded Millo, Dov Steiner, David Katz, Assaf Aharoni, Shihai Kan, Taleb Mokari, Uri Banin

Research output: Contribution to journal › Conference article › peer-review

14 Scopus citations

Abstract

Tunneling and optical spectroscopy performed on InAs nanorods 7-25 nm long, reveal a clear dependence of the band gap on length. This (zero-dimension like) behavior is different from that of CdSe rods, where the band gap is nearly independent of length, a signature of quasi-one-dimensionality. The transition between these two regimes is governed by the ratio between the Bohr radius and the nanorods length. The gaps measured by tunneling spectroscopy are larger than the optical gaps by a factor that depends on the tunneling configuration. This is attributed to a combination of the Coulomb interaction and the voltage division between the two tunnel junctions in the STM experiment. However, the tunneling gaps were found to reduce in dense aggregates of rods.

Original language	English
Pages (from-to)	1-8
Number of pages	8
Journal	Physica E: Low-Dimensional Systems and Nanostructures
Volume	26
Issue number	1-4
DOIs	https://doi.org/10.1016/j.physe.2004.08.062
State	Published - Feb 2005
Event	International Conference on Quantum Dots - Banff, Alberta, Canada Duration: 10 May 2004 → 13 May 2004

Bibliographical note

Funding Information:
We thank Dr. Inna Popov and Avi Ben-Chur, from the Unit for Nanocharacterization of the Hebrew University Center for Nanoscience and Nanotechnology for the electron microscopy characterization of the nanorods samples. This work was supported in part by grants from the Israel-US Binational Foundation, the Germin-Israel Program (DIP), and the Israel Science Foundation.

Keywords

Nanocrystals
Nanorods
Quantum confinement
Scanning tunneling spectroscopy
Single electron tunneling

Access to Document

10.1016/j.physe.2004.08.062

Cite this

@article{66b7671f6b9a4ae093a285cba69f5c1d,

title = "Transition from zero-dimensional to one-dimensional behavior in InAs and CdSe nanorods",

abstract = "Tunneling and optical spectroscopy performed on InAs nanorods 7-25 nm long, reveal a clear dependence of the band gap on length. This (zero-dimension like) behavior is different from that of CdSe rods, where the band gap is nearly independent of length, a signature of quasi-one-dimensionality. The transition between these two regimes is governed by the ratio between the Bohr radius and the nanorods length. The gaps measured by tunneling spectroscopy are larger than the optical gaps by a factor that depends on the tunneling configuration. This is attributed to a combination of the Coulomb interaction and the voltage division between the two tunnel junctions in the STM experiment. However, the tunneling gaps were found to reduce in dense aggregates of rods.",

keywords = "Nanocrystals, Nanorods, Quantum confinement, Scanning tunneling spectroscopy, Single electron tunneling",

author = "Oded Millo and Dov Steiner and David Katz and Assaf Aharoni and Shihai Kan and Taleb Mokari and Uri Banin",

note = "Funding Information: We thank Dr. Inna Popov and Avi Ben-Chur, from the Unit for Nanocharacterization of the Hebrew University Center for Nanoscience and Nanotechnology for the electron microscopy characterization of the nanorods samples. This work was supported in part by grants from the Israel-US Binational Foundation, the Germin-Israel Program (DIP), and the Israel Science Foundation.; International Conference on Quantum Dots ; Conference date: 10-05-2004 Through 13-05-2004",

year = "2005",

month = feb,

doi = "10.1016/j.physe.2004.08.062",

language = "אנגלית",

volume = "26",

pages = "1--8",

journal = "Physica E: Low-Dimensional Systems and Nanostructures",

issn = "1386-9477",

publisher = "Elsevier",

number = "1-4",

}

TY - JOUR

T1 - Transition from zero-dimensional to one-dimensional behavior in InAs and CdSe nanorods

AU - Millo, Oded

AU - Steiner, Dov

AU - Katz, David

AU - Aharoni, Assaf

AU - Kan, Shihai

AU - Mokari, Taleb

AU - Banin, Uri

N1 - Funding Information: We thank Dr. Inna Popov and Avi Ben-Chur, from the Unit for Nanocharacterization of the Hebrew University Center for Nanoscience and Nanotechnology for the electron microscopy characterization of the nanorods samples. This work was supported in part by grants from the Israel-US Binational Foundation, the Germin-Israel Program (DIP), and the Israel Science Foundation.

PY - 2005/2

Y1 - 2005/2

N2 - Tunneling and optical spectroscopy performed on InAs nanorods 7-25 nm long, reveal a clear dependence of the band gap on length. This (zero-dimension like) behavior is different from that of CdSe rods, where the band gap is nearly independent of length, a signature of quasi-one-dimensionality. The transition between these two regimes is governed by the ratio between the Bohr radius and the nanorods length. The gaps measured by tunneling spectroscopy are larger than the optical gaps by a factor that depends on the tunneling configuration. This is attributed to a combination of the Coulomb interaction and the voltage division between the two tunnel junctions in the STM experiment. However, the tunneling gaps were found to reduce in dense aggregates of rods.

AB - Tunneling and optical spectroscopy performed on InAs nanorods 7-25 nm long, reveal a clear dependence of the band gap on length. This (zero-dimension like) behavior is different from that of CdSe rods, where the band gap is nearly independent of length, a signature of quasi-one-dimensionality. The transition between these two regimes is governed by the ratio between the Bohr radius and the nanorods length. The gaps measured by tunneling spectroscopy are larger than the optical gaps by a factor that depends on the tunneling configuration. This is attributed to a combination of the Coulomb interaction and the voltage division between the two tunnel junctions in the STM experiment. However, the tunneling gaps were found to reduce in dense aggregates of rods.

KW - Nanocrystals

KW - Nanorods

KW - Quantum confinement

KW - Scanning tunneling spectroscopy

KW - Single electron tunneling

UR - http://www.scopus.com/inward/record.url?scp=13444266238&partnerID=8YFLogxK

U2 - 10.1016/j.physe.2004.08.062

DO - 10.1016/j.physe.2004.08.062

M3 - ???researchoutput.researchoutputtypes.contributiontojournal.conferencearticle???

AN - SCOPUS:13444266238

SN - 1386-9477

VL - 26

SP - 1

EP - 8

JO - Physica E: Low-Dimensional Systems and Nanostructures

JF - Physica E: Low-Dimensional Systems and Nanostructures

IS - 1-4

T2 - International Conference on Quantum Dots

Y2 - 10 May 2004 through 13 May 2004

ER -

Transition from zero-dimensional to one-dimensional behavior in InAs and CdSe nanorods

Abstract

Bibliographical note

Keywords

Access to Document

Other files and links

Fingerprint

Cite this