Adsorption on Heterogeneous Surfaces with Simple Topographies
The localized monolayer adsorption of interacting particles onto heterogeneous surfaces has been studied through Monte Carlo simulation in the framework of the lattice–gas model. The substrate was modelled as a collection of finite homotatic patches, each one characterized by an adsorption energy ar...
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| Format: | Article |
| Language: | English |
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SAGE Publishing
2011-07-01
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| Series: | Adsorption Science & Technology |
| Online Access: | https://doi.org/10.1260/0263-6174.29.7.613 |
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| author | P.M. Centres F. Bulnes J.L. Riccardo A.J. Ramirez-Pastor M.A. Perarnau |
| author_facet | P.M. Centres F. Bulnes J.L. Riccardo A.J. Ramirez-Pastor M.A. Perarnau |
| author_sort | P.M. Centres |
| collection | DOAJ |
| description | The localized monolayer adsorption of interacting particles onto heterogeneous surfaces has been studied through Monte Carlo simulation in the framework of the lattice–gas model. The substrate was modelled as a collection of finite homotatic patches, each one characterized by an adsorption energy arising from a discrete energy density function. Patches were distributed spatially, either in a deterministic alternate way (ordered topography) or in a non-overlapping random way (random topography). The adsorption process was analyzed by following the behaviour of surface coverage versus chemical potential (adsorption isotherm) and the differential heat of adsorption as a function of the coverage. These quantities depend on the size of the patch as well as on the topological distribution of the patches on the surface. The consequences of these findings are discussed for the determination of the energetic topography of the surface from adsorption measurements. |
| format | Article |
| id | doaj-art-defcc9d535384a3d9779dd929f095dd5 |
| institution | Kabale University |
| issn | 0263-6174 2048-4038 |
| language | English |
| publishDate | 2011-07-01 |
| publisher | SAGE Publishing |
| record_format | Article |
| series | Adsorption Science & Technology |
| spelling | doaj-art-defcc9d535384a3d9779dd929f095dd52025-01-03T01:24:45ZengSAGE PublishingAdsorption Science & Technology0263-61742048-40382011-07-012910.1260/0263-6174.29.7.613Adsorption on Heterogeneous Surfaces with Simple TopographiesP.M. Centres0F. Bulnes1J.L. Riccardo2A.J. Ramirez-Pastor3M.A. Perarnau4 Departamento de Física, Instituto de Física Aplicada, Universidad Nacional de San Luis-CONICET, Chacabuco 917, D5700BWS San Luis, Argentina Departamento de Física, Instituto de Física Aplicada, Universidad Nacional de San Luis-CONICET, Chacabuco 917, D5700BWS San Luis, Argentina Departamento de Física, Instituto de Física Aplicada, Universidad Nacional de San Luis-CONICET, Chacabuco 917, D5700BWS San Luis, Argentina Departamento de Física, Instituto de Física Aplicada, Universidad Nacional de San Luis-CONICET, Chacabuco 917, D5700BWS San Luis, Argentina Departamento de Geofísica y Astronomía, Universidad Nacional de San Juan, Meglioli 1160 S, 5400 Rivadavia, San Juan, ArgentinaThe localized monolayer adsorption of interacting particles onto heterogeneous surfaces has been studied through Monte Carlo simulation in the framework of the lattice–gas model. The substrate was modelled as a collection of finite homotatic patches, each one characterized by an adsorption energy arising from a discrete energy density function. Patches were distributed spatially, either in a deterministic alternate way (ordered topography) or in a non-overlapping random way (random topography). The adsorption process was analyzed by following the behaviour of surface coverage versus chemical potential (adsorption isotherm) and the differential heat of adsorption as a function of the coverage. These quantities depend on the size of the patch as well as on the topological distribution of the patches on the surface. The consequences of these findings are discussed for the determination of the energetic topography of the surface from adsorption measurements.https://doi.org/10.1260/0263-6174.29.7.613 |
| spellingShingle | P.M. Centres F. Bulnes J.L. Riccardo A.J. Ramirez-Pastor M.A. Perarnau Adsorption on Heterogeneous Surfaces with Simple Topographies Adsorption Science & Technology |
| title | Adsorption on Heterogeneous Surfaces with Simple Topographies |
| title_full | Adsorption on Heterogeneous Surfaces with Simple Topographies |
| title_fullStr | Adsorption on Heterogeneous Surfaces with Simple Topographies |
| title_full_unstemmed | Adsorption on Heterogeneous Surfaces with Simple Topographies |
| title_short | Adsorption on Heterogeneous Surfaces with Simple Topographies |
| title_sort | adsorption on heterogeneous surfaces with simple topographies |
| url | https://doi.org/10.1260/0263-6174.29.7.613 |
| work_keys_str_mv | AT pmcentres adsorptiononheterogeneoussurfaceswithsimpletopographies AT fbulnes adsorptiononheterogeneoussurfaceswithsimpletopographies AT jlriccardo adsorptiononheterogeneoussurfaceswithsimpletopographies AT ajramirezpastor adsorptiononheterogeneoussurfaceswithsimpletopographies AT maperarnau adsorptiononheterogeneoussurfaceswithsimpletopographies |