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Núcleo de hielo en una superficie ondulada
Chenfang Lin1, Gefen Corem2, Oded Godsi2
1Surface Science Research Centre and Department of Chemistry , University of Liverpool , Liverpool L69 3BX , U.K.
Journal of the American Chemical Society
|October 30, 2018
Resumen
La nucleación de hielo heterogéneo en superficies corrugadas, como el Cu ((511), promueve el crecimiento de la película de hielo. Las corrugadas a nanoescala estabilizan las capas de agua, mejorando la nucleación del hielo e impactando los modelos climáticos.
Área de la Ciencia:
- Ciencias de la superficie
- Química Física
- Ciencias del medio ambiente
Sus antecedentes:
- La nucleación de hielo heterogéneo es crucial para el modelado atmosférico y climático.
- La comprensión del crecimiento tridimensional del hielo de las capas iniciales de agua en las superficies sigue siendo incompleta.
- La eficiencia de las superficies en la nucleación de hielo a granel no se comprende completamente.
Objetivo del estudio:
- Investigar la reestructuración del agua en una superficie corrugada hidrofílica/hidrofóbica.
- Para aclarar el mecanismo de formación de la película de hielo de la primera capa de agua.
- Determinar el papel del corrugado superficial en la eficiencia de la nucleación del hielo.
Principales métodos:
- Simulaciones del comportamiento del agua en una superficie corrugada de Cu.
- Análisis de la formación y reestructuración de las redes de agua.
- Comparación con estudios en superficies planas.
Principales resultados:
- El agua en el Cu511 ondulado forma una capa húmeda hexagonal abrochada con sitios donantes y aceptores de enlaces H.
- Esta primera capa de agua se relaja en una disposición similar al hielo, estabilizando las capas de hielo posteriores.
- La corrugado superficial a nanoescala mejora significativamente la nucleación de hielo en comparación con las superficies planas.
Conclusiones:
- Las superficies onduladas proporcionan una plantilla favorable para el crecimiento de hielo multicapa.
- La corrosión superficial es un factor clave que influye en la eficiencia de la nucleación del hielo.
- Este hallazgo tiene implicaciones para la comprensión de las superficies naturales y de ingeniería en el clima y la ciencia de los materiales.
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