Abstract
Relative surface topography of metal electrodes is one of the subtle issues determining the electrical performance of molecular devices. Systematic conductivity measurements of nanoscale junctions containing self-assembled monolayer of conjugated molecules are reported for a variety of metal electrodes. The monolayer is assembled on 25-100 nm electrode. Another 10-100 nm electrode is defined on top of the monolayer by metal evaporation. The characteristic energy scales are determined from the temperature dependence of conductance and from the non-linear current-voltage characteristics. Unexpectedly, the energy scales of the dominant conductance channels are small in comparison with the molecular level spacing. In all cases, the dominant room temperature conductance is hopping with characteristic energy of the order of 10-100 meV determined by the nature of metal contacts. Relative contribution of tunneling conductance strongly depends on the surface topography of the metal electrodes.
| Original language | English |
|---|---|
| Title of host publication | Proceedings of SPIE - The International Society for Optical Engineering |
| Editors | W.Y.-C. Lai, S. Pau, O.D. Lopez |
| Pages | 91-99 |
| Number of pages | 9 |
| Volume | 5592 |
| DOIs | |
| Publication status | Published - 2005 |
| Event | Nanofabrication: Technologies, Devices, and Applications - Philadelphia, PA, United States Duration: Oct 25 2004 → Oct 28 2004 |
Other
| Other | Nanofabrication: Technologies, Devices, and Applications |
|---|---|
| Country | United States |
| City | Philadelphia, PA |
| Period | 10/25/04 → 10/28/04 |
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Keywords
- Molecular electronics
- Nanofabrication
- Tunneling
ASJC Scopus subject areas
- Electrical and Electronic Engineering
- Condensed Matter Physics
Cite this
Conductance of molecular nanojunctions : Roles of surface topography and metal contacts. / Zhitenev, Nikolai; Erbe, Artur; Bao, Zhenan; Jiang, Weirong; Garfunkel, Eric.
Proceedings of SPIE - The International Society for Optical Engineering. ed. / W.Y.-C. Lai; S. Pau; O.D. Lopez. Vol. 5592 2005. p. 91-99 21.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
}
TY - GEN
T1 - Conductance of molecular nanojunctions
T2 - Roles of surface topography and metal contacts
AU - Zhitenev, Nikolai
AU - Erbe, Artur
AU - Bao, Zhenan
AU - Jiang, Weirong
AU - Garfunkel, Eric
PY - 2005
Y1 - 2005
N2 - Relative surface topography of metal electrodes is one of the subtle issues determining the electrical performance of molecular devices. Systematic conductivity measurements of nanoscale junctions containing self-assembled monolayer of conjugated molecules are reported for a variety of metal electrodes. The monolayer is assembled on 25-100 nm electrode. Another 10-100 nm electrode is defined on top of the monolayer by metal evaporation. The characteristic energy scales are determined from the temperature dependence of conductance and from the non-linear current-voltage characteristics. Unexpectedly, the energy scales of the dominant conductance channels are small in comparison with the molecular level spacing. In all cases, the dominant room temperature conductance is hopping with characteristic energy of the order of 10-100 meV determined by the nature of metal contacts. Relative contribution of tunneling conductance strongly depends on the surface topography of the metal electrodes.
AB - Relative surface topography of metal electrodes is one of the subtle issues determining the electrical performance of molecular devices. Systematic conductivity measurements of nanoscale junctions containing self-assembled monolayer of conjugated molecules are reported for a variety of metal electrodes. The monolayer is assembled on 25-100 nm electrode. Another 10-100 nm electrode is defined on top of the monolayer by metal evaporation. The characteristic energy scales are determined from the temperature dependence of conductance and from the non-linear current-voltage characteristics. Unexpectedly, the energy scales of the dominant conductance channels are small in comparison with the molecular level spacing. In all cases, the dominant room temperature conductance is hopping with characteristic energy of the order of 10-100 meV determined by the nature of metal contacts. Relative contribution of tunneling conductance strongly depends on the surface topography of the metal electrodes.
KW - Molecular electronics
KW - Nanofabrication
KW - Tunneling
UR - http://www.scopus.com/inward/record.url?scp=16644383534&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=16644383534&partnerID=8YFLogxK
U2 - 10.1117/12.577210
DO - 10.1117/12.577210
M3 - Conference contribution
VL - 5592
SP - 91
EP - 99
BT - Proceedings of SPIE - The International Society for Optical Engineering
A2 - Lai, W.Y.-C.
A2 - Pau, S.
A2 - Lopez, O.D.
ER -