1. A nano-cheese-cutter to directly measure interfacial adhesion of freestanding nano-fibers.
- Author
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Wang, Xin, Najem, Johnny F., Wong, Shing-Chung, and Wan, Kai-tak
- Subjects
- *
ADHESION , *NANOFIBERS , *ELECTROSPINNING , *ATOMIC force microscopes , *CANTILEVERS , *MICA , *SUBSTRATES (Materials science) , *DEFORMATIONS (Mechanics) - Abstract
A nano-cheese-cutter is fabricated to directly measure the adhesion between two freestanding nano-fibers. A single electrospun fiber is attached to the free end of an atomic force microscope cantilever, while a similar fiber is similarly prepared on a mica substrate in an orthogonal direction. External load is applied to deform the two fibers into complementary V-shapes, and the force measurement allows the elastic modulus to be determined. At a critical tensile load, 'pull-off' occurs when the adhering fibers spontaneously detach from each other, yielding the interfacial adhesion energy. Loading-unloading cycles are performed to investigate repeated adhesion-detachment and surface degradation. [ABSTRACT FROM AUTHOR]
- Published
- 2012
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