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Los nanomotores catalíticos mesoporosos Janus para la entrega de cargas activas para el transporte de carga activa
Xing Ma1, Kersten Hahn1, Samuel Sanchez1,2,3
1†Max Planck Institute for Intelligent Systems Institution, Heisenbergstraße 3, 70569 Stuttgart, Germany.
Journal of the American Chemical Society
|April 7, 2015
Resumen
Desarrollamos nanomotores Janus utilizando nanopartículas de sílice mesoporosa (MSNP) y recubrimientos de platino. Estos nanocarriers activos mejoran la entrega de carga hasta en un 100% a través de la propulsión catalítica.
Área de la Ciencia:
- Nanotecnología La nanotecnología es la nanotecnología.
- Ciencia de los materiales Ciencia de los materiales.
- Ingeniería Química Ingeniería Química.
Sus antecedentes:
- Las nanopartículas de sílice mesoporosa (MSNP) ofrecen una gran superficie para la carga de carga.
- Los nanomotores Janus combinan la propulsión catalítica con el diseño a nanoescala para el transporte activo.
- Los sistemas de entrega de carga requieren un movimiento eficiente y dirigido a nanoescala.
Objetivo del estudio:
- Diseñar y caracterizar los nanomotores Janus para la entrega de carga activa.
- Investigar la sinergia entre la propulsión catalítica y los MSNP.
- Para evaluar la difusión mejorada y las capacidades de carga de carga de estos nanomotores.
Principales métodos:
- Fabricación de nanomotores Janus a través de deposición de platino con haz de electrones (e-beam) en MSNP.
- Utilizando bajas concentraciones de combustible H2O2 (<3 wt %) para la propulsión impulsada químicamente.
- Medición de los coeficientes de difusión aparente para cuantificar el movimiento mejorado en comparación con el movimiento browniano.
Principales resultados:
- Los nanomotores Janus con tamaños <100 nm (40, 65, 90 nm) fueron sintetizados con éxito.
- Se observó difusión activa a bajas concentraciones de combustible, mejorando los coeficientes de difusión aparente hasta en un 100%.
- La arquitectura mesoporosa facilitaba la carga de carga de alta capacidad.
Conclusiones:
- La combinación de propulsión catalítica y MSNP crea nanomotores Janus efectivos para la entrega de carga activa.
- Estos nanomotores demuestran una mayor movilidad y una capacidad de carga significativa.
- Los nanomotores desarrollados son prometedores para aplicaciones de entrega de carga dirigida en un chip.
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