Abstract
Recent single molecule experiments rely on the self-assembly of binary mixtures of molecules with very different properties in a stable monolayer, in order to probe the characteristics of the interspersed molecule of interest in a controlled environment. However, not all efforts at coassembly have been successful. To study systematically the behavior of such systems, we derive the free energy of multicomponent systems of rods with configurational degrees of freedom, localized on a surface, starting from a generalized van der Waals description. The molecular parameters are determined by geometrical factors of the molecules and by their pairwise van der Waals interactions computed using molecular mechanics. Applying the model to two experimental situations, we are able to use the stability analysis of the respective mixtures to explain why coassembly was successful in one set of experiments (carotene and alkanethiol) and not in another (benzenethiols and alkanethiol). We outline general guidelines for suitable choices of molecules to achieve coassembly.
| Original language | English |
|---|---|
| Article number | 074708 |
| Journal | Journal of Chemical Physics |
| Volume | 125 |
| Issue number | 7 |
| DOIs | |
| Publication status | Published - 2006 |
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ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics
Cite this
Stability and phase separation in mixed self-assembled monolayers. / Yaliraki, S. N.; Longo, Gabriel; Gale, Ella; Szleifer, I.; Ratner, Mark A.
In: Journal of Chemical Physics, Vol. 125, No. 7, 074708, 2006.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Stability and phase separation in mixed self-assembled monolayers
AU - Yaliraki, S. N.
AU - Longo, Gabriel
AU - Gale, Ella
AU - Szleifer, I.
AU - Ratner, Mark A
PY - 2006
Y1 - 2006
N2 - Recent single molecule experiments rely on the self-assembly of binary mixtures of molecules with very different properties in a stable monolayer, in order to probe the characteristics of the interspersed molecule of interest in a controlled environment. However, not all efforts at coassembly have been successful. To study systematically the behavior of such systems, we derive the free energy of multicomponent systems of rods with configurational degrees of freedom, localized on a surface, starting from a generalized van der Waals description. The molecular parameters are determined by geometrical factors of the molecules and by their pairwise van der Waals interactions computed using molecular mechanics. Applying the model to two experimental situations, we are able to use the stability analysis of the respective mixtures to explain why coassembly was successful in one set of experiments (carotene and alkanethiol) and not in another (benzenethiols and alkanethiol). We outline general guidelines for suitable choices of molecules to achieve coassembly.
AB - Recent single molecule experiments rely on the self-assembly of binary mixtures of molecules with very different properties in a stable monolayer, in order to probe the characteristics of the interspersed molecule of interest in a controlled environment. However, not all efforts at coassembly have been successful. To study systematically the behavior of such systems, we derive the free energy of multicomponent systems of rods with configurational degrees of freedom, localized on a surface, starting from a generalized van der Waals description. The molecular parameters are determined by geometrical factors of the molecules and by their pairwise van der Waals interactions computed using molecular mechanics. Applying the model to two experimental situations, we are able to use the stability analysis of the respective mixtures to explain why coassembly was successful in one set of experiments (carotene and alkanethiol) and not in another (benzenethiols and alkanethiol). We outline general guidelines for suitable choices of molecules to achieve coassembly.
UR - http://www.scopus.com/inward/record.url?scp=33747590766&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=33747590766&partnerID=8YFLogxK
U2 - 10.1063/1.2336198
DO - 10.1063/1.2336198
M3 - Article
AN - SCOPUS:33747590766
VL - 125
JO - Journal of Chemical Physics
JF - Journal of Chemical Physics
SN - 0021-9606
IS - 7
M1 - 074708
ER -