Grafeno/sílica nanoporosa

Grafeno/sílica nanoporosa

Jarnail Singh

64,37 €
IVA incluido
Disponible
Editorial:
KS OmniScriptum Publishing
Año de edición:
2025
ISBN:
9786208006198
64,37 €
IVA incluido
Disponible

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Este estudo desenvolve um revestimento antirreflexo (AR) de banda larga e grande angular de camada única com uma superfície hidrofóbica para evitar a contaminação ambiental. A porosidade foi introduzida na matriz da película de sílica utilizando um método sol-gel catalisado por ácido com polietilenoglicol (PEG) como modificador de porosidade. O sol de sílica modificado com PEG4000 obteve uma porosidade óptima (2-4 nm) e a maior transmitância (98,2%). Foi adicionada uma camada de grafeno para aumentar a hidrofobicidade, obtendo-se um ângulo de contacto de 105,3°, compensando uma ligeira redução da transmitância (1,15%). A microscopia de força atómica e a microscopia eletrónica de varrimento por emissão de campo confirmaram o aumento da porosidade e a morfologia da superfície em forma de ranhura. As medições do ângulo de contacto indicaram fortes interações de van der Waals entre a película de sílica porosa e o grafeno, conduzindo a um revestimento AR hidrofóbico e anti-corrosivo.

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