Abstract
An electrical junction formed by mechanical contact between two self-assembled monolayers (SAMs)-a SAM formed from an dialkyl disulfide with a covalently linked tetracyanoquinodimethane group that is supported by silver (or gold) and a SAM formed from an alkanethiolate SAM that is supported by mercury-rectifies current. The precursor to the SAM on silver (or gold) was bis(20-(2-((2,5-cyclohexadiene- 1,4-diylidene)dimalonitrile))decyl)) disulfide and that for the SAM on mercury was HS(CH2)n-1CH3 (n = 14, 16, 18). The electrical properties of the junctions were characterized by current-voltage measurements. The ratio of the conductivity of the junction in the forward bias (Hg cathodic) to that in the reverse bias (Hg anodic), at a potential of 1 V, was, 9 ± 2 when the SAM on mercury was derived from HS(CH2)15CH3. The ratio of the conductivity in the forward bias to that in the reverse bias increased with decreasing chain length of the alkanethiol used to form the SAM on mercury. These results demonstrate that a single redox center asymmetrically placed in a metal-insulator-metal junction can cause the rectification of current and indicate that a fixed dipole in the insulating region of a metal-insulator-metal junction is not required for rectification.
| Original language | English |
|---|---|
| Pages (from-to) | 11730-11736 |
| Number of pages | 7 |
| Journal | Journal of the American Chemical Society |
| Volume | 124 |
| Issue number | 39 |
| DOIs | |
| Publication status | Published - Oct 2 2002 |
Fingerprint
ASJC Scopus subject areas
- Chemistry(all)
Cite this
Molecular rectification in a metal-insulator-metal junction based on self-assembled monolayers. / Chabinyc, Michael L.; Chen, Xiaoxi; Holmlin, R. Erik; Jacobs, Heiko; Skulason, Hjalti; Frisbie, C. Daniel; Mujica, Vladimiro; Ratner, Mark A; Rampi, Maria Anita; Whitesides, George M.
In: Journal of the American Chemical Society, Vol. 124, No. 39, 02.10.2002, p. 11730-11736.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Molecular rectification in a metal-insulator-metal junction based on self-assembled monolayers
AU - Chabinyc, Michael L.
AU - Chen, Xiaoxi
AU - Holmlin, R. Erik
AU - Jacobs, Heiko
AU - Skulason, Hjalti
AU - Frisbie, C. Daniel
AU - Mujica, Vladimiro
AU - Ratner, Mark A
AU - Rampi, Maria Anita
AU - Whitesides, George M.
PY - 2002/10/2
Y1 - 2002/10/2
N2 - An electrical junction formed by mechanical contact between two self-assembled monolayers (SAMs)-a SAM formed from an dialkyl disulfide with a covalently linked tetracyanoquinodimethane group that is supported by silver (or gold) and a SAM formed from an alkanethiolate SAM that is supported by mercury-rectifies current. The precursor to the SAM on silver (or gold) was bis(20-(2-((2,5-cyclohexadiene- 1,4-diylidene)dimalonitrile))decyl)) disulfide and that for the SAM on mercury was HS(CH2)n-1CH3 (n = 14, 16, 18). The electrical properties of the junctions were characterized by current-voltage measurements. The ratio of the conductivity of the junction in the forward bias (Hg cathodic) to that in the reverse bias (Hg anodic), at a potential of 1 V, was, 9 ± 2 when the SAM on mercury was derived from HS(CH2)15CH3. The ratio of the conductivity in the forward bias to that in the reverse bias increased with decreasing chain length of the alkanethiol used to form the SAM on mercury. These results demonstrate that a single redox center asymmetrically placed in a metal-insulator-metal junction can cause the rectification of current and indicate that a fixed dipole in the insulating region of a metal-insulator-metal junction is not required for rectification.
AB - An electrical junction formed by mechanical contact between two self-assembled monolayers (SAMs)-a SAM formed from an dialkyl disulfide with a covalently linked tetracyanoquinodimethane group that is supported by silver (or gold) and a SAM formed from an alkanethiolate SAM that is supported by mercury-rectifies current. The precursor to the SAM on silver (or gold) was bis(20-(2-((2,5-cyclohexadiene- 1,4-diylidene)dimalonitrile))decyl)) disulfide and that for the SAM on mercury was HS(CH2)n-1CH3 (n = 14, 16, 18). The electrical properties of the junctions were characterized by current-voltage measurements. The ratio of the conductivity of the junction in the forward bias (Hg cathodic) to that in the reverse bias (Hg anodic), at a potential of 1 V, was, 9 ± 2 when the SAM on mercury was derived from HS(CH2)15CH3. The ratio of the conductivity in the forward bias to that in the reverse bias increased with decreasing chain length of the alkanethiol used to form the SAM on mercury. These results demonstrate that a single redox center asymmetrically placed in a metal-insulator-metal junction can cause the rectification of current and indicate that a fixed dipole in the insulating region of a metal-insulator-metal junction is not required for rectification.
UR - http://www.scopus.com/inward/record.url?scp=0037010021&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0037010021&partnerID=8YFLogxK
U2 - 10.1021/ja020506c
DO - 10.1021/ja020506c
M3 - Article
VL - 124
SP - 11730
EP - 11736
JO - Journal of the American Chemical Society
JF - Journal of the American Chemical Society
SN - 0002-7863
IS - 39
ER -