Abstract
A study was conducted to investigate the place-exchange at ligand-defined topological point defects in mixed-monolayer-protected nanoparticles (NP) and present a full thermodynamic analysis of reactivity at point defects in these self-assembled monolayers (SAM). The study demonstrated that the kinetics and free energy of the reactions are different at these points, when compared with clean or monolayer-protected gold surfaces. It was also demonstrated that these thermodynamic parameters are affected by the identity of the molecules in the ligand shell. It was observed that mixed SAMs, composed of a binary mixture of immiscible thiolated molecules phase-separated on flat surfaces, forming wormlike domains. The shape of the domains were determined by an equilibrium between enhthalpic losses and entropic gains associated with the formation of domain boundaries.
| Original language | English |
|---|---|
| Pages (from-to) | 4243-4247 |
| Number of pages | 5 |
| Journal | Advanced Materials |
| Volume | 20 |
| Issue number | 22 |
| DOIs | |
| Publication status | Published - Nov 18 2008 |
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ASJC Scopus subject areas
- Materials Science(all)
- Mechanics of Materials
- Mechanical Engineering
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Thermodynamic study of the reactivity of the two topological point defects present in mixed self-assembled monolayers on gold nanoparticles. / Devries, Gretchen A.; Talley, Frajovon R.; Carney, Randy P.; Stellacci, Francesco.
In: Advanced Materials, Vol. 20, No. 22, 18.11.2008, p. 4243-4247.Research output: Contribution to journal › Article
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TY - JOUR
T1 - Thermodynamic study of the reactivity of the two topological point defects present in mixed self-assembled monolayers on gold nanoparticles
AU - Devries, Gretchen A.
AU - Talley, Frajovon R.
AU - Carney, Randy P.
AU - Stellacci, Francesco
PY - 2008/11/18
Y1 - 2008/11/18
N2 - A study was conducted to investigate the place-exchange at ligand-defined topological point defects in mixed-monolayer-protected nanoparticles (NP) and present a full thermodynamic analysis of reactivity at point defects in these self-assembled monolayers (SAM). The study demonstrated that the kinetics and free energy of the reactions are different at these points, when compared with clean or monolayer-protected gold surfaces. It was also demonstrated that these thermodynamic parameters are affected by the identity of the molecules in the ligand shell. It was observed that mixed SAMs, composed of a binary mixture of immiscible thiolated molecules phase-separated on flat surfaces, forming wormlike domains. The shape of the domains were determined by an equilibrium between enhthalpic losses and entropic gains associated with the formation of domain boundaries.
AB - A study was conducted to investigate the place-exchange at ligand-defined topological point defects in mixed-monolayer-protected nanoparticles (NP) and present a full thermodynamic analysis of reactivity at point defects in these self-assembled monolayers (SAM). The study demonstrated that the kinetics and free energy of the reactions are different at these points, when compared with clean or monolayer-protected gold surfaces. It was also demonstrated that these thermodynamic parameters are affected by the identity of the molecules in the ligand shell. It was observed that mixed SAMs, composed of a binary mixture of immiscible thiolated molecules phase-separated on flat surfaces, forming wormlike domains. The shape of the domains were determined by an equilibrium between enhthalpic losses and entropic gains associated with the formation of domain boundaries.
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U2 - 10.1002/adma.200702472
DO - 10.1002/adma.200702472
M3 - Article
VL - 20
SP - 4243
EP - 4247
JO - Advanced Materials
JF - Advanced Materials
SN - 0935-9648
IS - 22
ER -