Nanofluidics in hollow nanowires

Area of Science:

• Materials Science
• Nanotechnology
• Biophysics

Background:

• Nanotube membranes are crucial for various applications, including filtration and sensing.
• Previous methods for creating such membranes often lack precise dimensional control.
• Hollow nanowires offer a promising platform for constructing advanced membrane structures.

Purpose of the Study:

• To develop a novel and controllable method for fabricating nanotube membranes.
• To demonstrate the functionality of these membranes for molecular transport applications.

Main Methods:

• Growth of GaAs-AlInP core-shell nanowires using metal-organic vapor phase epitaxy (MOVPE).
• Partial embedding of nanowires in a polymer film.
• Selective etching of the GaAs core and substrate to create hollow tubes.
• Epifluorescence microscopy to observe electrophoretic transport.

Main Results:

• Successfully produced free-standing nanotube membranes with controllable dimensions.
• Demonstrated the open access of the hollow nanowires from both sides of the membrane.
• Confirmed the electrophoretic transport of T4-phage DNA through the fabricated nanowire channels.

Conclusions:

• The presented scheme offers a versatile approach for fabricating tunable nanotube membranes.
• The demonstrated DNA transport highlights the potential of these membranes in biological and nanoscale applications.
• This method provides a new pathway for creating advanced nanostructures for molecular manipulation and analysis.