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La unión de monocapas compactas de organofosfonato autoensambladas a la superficie nativa de óxido de silicio en la
Eric L Hanson1, Jeffrey Schwartz, Bert Nickel
1Department of Chemistry, Princeton University, Princeton, New Jersey 08544-1009, USA.
Journal of the American Chemical Society
|December 18, 2003
Resumen
Los investigadores desarrollaron un nuevo método para crear robustas películas monocapa de fosfonato en superficies de óxido de silicio. Esta técnica asegura una cobertura de superficie completa y un empaque molecular ordenado para aplicaciones en la ciencia de la superficie.
Área de la Ciencia:
- Ciencia de los materiales Ciencia de los materiales.
- Química de las superficies.
- Nanotecnología La nanotecnología es la nanotecnología.
Sus antecedentes:
- Las películas monocapa en superficies de óxido de silicio son cruciales para varias aplicaciones.
- El desarrollo de métodos para películas fuertemente unidas y compactas es un desafío continuo.
Objetivo del estudio:
- Introducir un nuevo método para la preparación de películas monocapa compactas y fuertemente unidas de alquil- y arilfosfonatos.
- Para demostrar la eficacia de este método utilizando moléculas específicas de fosfonato.
Principales métodos:
- Preparación de películas de alquilo y arilfosfonato en las superficies nativas de óxido de silicio (SiO(2) / Si.
- Microscopía de Fuerza Atómica (AFM) para el análisis de la cobertura superficial y el grosor de la película.
- Reflectividad de rayos X y análisis gravimétrico para una caracterización precisa de la película.
Principales resultados:
- Se logró una cobertura superficial completa tanto para el octadecilfosfonato como para el alfa-cuartetiofeno-2-fosfonato.
- espesor medido de la película de aproximadamente 18 Å para 4TP/SiO(2)/Si.
- Los valores de cobertura superficial indican un empaquetado molecular cercano a las estructuras cristalinas.
Conclusiones:
- El método descrito permite la formación de películas monocapa compactas y fuertemente unidas en SiO2 / Si.
- Las películas exhiben una excelente cobertura superficial y arreglos moleculares ordenados.
- Esta técnica ofrece una ruta confiable para la funcionalización superficial con monocapas de fosfonato.
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