Characterization of photoinduced electron tunneling in gold/SAM/Q-CdSe systems by time-resolved photoelectrochemistry

E.P.A.M. Bakkers; A.L. Roest; A.W. Marsman; L.W. Jenneskens; L.L. Jong-van.Steensel, De; J.J. Kelly; D. Vanmaekelbergh

doi:10.1021/jp000286u

Characterization of photoinduced electron tunneling in gold/SAM/Q-CdSe systems by time-resolved photoelectrochemistry

E.P.A.M. Bakkers, A.L. Roest, A.W. Marsman, L.W. Jenneskens, L.L. Jong-van.Steensel, De, J.J. Kelly, D. Vanmaekelbergh

Photonics and Semiconductor Nanophysics

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

77 Citations (SciVal)

Abstract

Colloidal CdSe quantum dots were chemisorbed on a gold electrode using a variety of self-assembled monolayers (SAMs) consisting of dithiols and rigid disulfides. After absorption of a photon with an energy larger than the band gap, a long-lived excited state is formed in the quantum dot; this state can decay by electron tunneling via the gold. The rate of photoinduced tunneling was measured directly by intensitymodulated photocurrent spectroscopy (IMPS), and its distance dependence was studied using rigid SAMs separating the Q-CdSe and Au. The tunneling rate was found to depend exponentially on the distance, with a decay length of 2 Å.

Original language	English
Pages (from-to)	7266-7272
Journal	Journal of Physical Chemistry B
Volume	104
Issue number	31
DOIs	https://doi.org/10.1021/jp000286u
Publication status	Published - 2000

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title = "Characterization of photoinduced electron tunneling in gold/SAM/Q-CdSe systems by time-resolved photoelectrochemistry",

abstract = "Colloidal CdSe quantum dots were chemisorbed on a gold electrode using a variety of self-assembled monolayers (SAMs) consisting of dithiols and rigid disulfides. After absorption of a photon with an energy larger than the band gap, a long-lived excited state is formed in the quantum dot; this state can decay by electron tunneling via the gold. The rate of photoinduced tunneling was measured directly by intensitymodulated photocurrent spectroscopy (IMPS), and its distance dependence was studied using rigid SAMs separating the Q-CdSe and Au. The tunneling rate was found to depend exponentially on the distance, with a decay length of 2 {\AA}.",

author = "E.P.A.M. Bakkers and A.L. Roest and A.W. Marsman and L.W. Jenneskens and {Jong-van.Steensel, De}, L.L. and J.J. Kelly and D. Vanmaekelbergh",

year = "2000",

doi = "10.1021/jp000286u",

language = "English",

volume = "104",

pages = "7266--7272",

journal = "Journal of Physical Chemistry B",

issn = "1520-6106",

publisher = "American Chemical Society",

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TY - JOUR

T1 - Characterization of photoinduced electron tunneling in gold/SAM/Q-CdSe systems by time-resolved photoelectrochemistry

AU - Bakkers, E.P.A.M.

AU - Roest, A.L.

AU - Marsman, A.W.

AU - Jenneskens, L.W.

AU - Jong-van.Steensel, De, L.L.

AU - Kelly, J.J.

AU - Vanmaekelbergh, D.

PY - 2000

Y1 - 2000

N2 - Colloidal CdSe quantum dots were chemisorbed on a gold electrode using a variety of self-assembled monolayers (SAMs) consisting of dithiols and rigid disulfides. After absorption of a photon with an energy larger than the band gap, a long-lived excited state is formed in the quantum dot; this state can decay by electron tunneling via the gold. The rate of photoinduced tunneling was measured directly by intensitymodulated photocurrent spectroscopy (IMPS), and its distance dependence was studied using rigid SAMs separating the Q-CdSe and Au. The tunneling rate was found to depend exponentially on the distance, with a decay length of 2 Å.

AB - Colloidal CdSe quantum dots were chemisorbed on a gold electrode using a variety of self-assembled monolayers (SAMs) consisting of dithiols and rigid disulfides. After absorption of a photon with an energy larger than the band gap, a long-lived excited state is formed in the quantum dot; this state can decay by electron tunneling via the gold. The rate of photoinduced tunneling was measured directly by intensitymodulated photocurrent spectroscopy (IMPS), and its distance dependence was studied using rigid SAMs separating the Q-CdSe and Au. The tunneling rate was found to depend exponentially on the distance, with a decay length of 2 Å.

U2 - 10.1021/jp000286u

DO - 10.1021/jp000286u

M3 - Article

SN - 1520-6106

VL - 104

SP - 7266

EP - 7272

JO - Journal of Physical Chemistry B

JF - Journal of Physical Chemistry B

IS - 31

ER -

Characterization of photoinduced electron tunneling in gold/SAM/Q-CdSe systems by time-resolved photoelectrochemistry

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