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Mechanical Properties of Organic Nanofibers
Author(s) -
KjelstrupHansen Jakob,
Hansen Ole,
Rubahn HorstGünter,
Bøggild Peter
Publication year - 2006
Publication title -
small
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.785
H-Index - 236
eISSN - 1613-6829
pISSN - 1613-6810
DOI - 10.1002/smll.200500457
Subject(s) - nanofiber , materials science , composite material , coating , micrometer , translational motion , adhesion , substrate (aquarium) , adhesive , fiber , nanotechnology , silicon , optoelectronics , optics , layer (electronics) , oceanography , physics , classical mechanics , geology
Intrinsic elastic and inelastic mechanical properties of individual, self‐assembled, quasi‐single‐crystalline para‐hexaphenylene nanofibers supported on substrates with different hydrophobicities are investigated as well as the interplay between the fibers and the underlying substrates. We find from atomic‐force‐microscopy‐based rupture experiments a rupture shear stress of about 2×10 7 Pa for an individual fiber. Deflecting a nanofiber suspended across a gap results in a Young’s modulus of 0.65 GPa. Translational motion of intact nanofibers across the surface is demonstrated for fibers on a silicon substrate with a low‐adhesion coating, whereas such motion on a noncoated substrate is limited to very short (sub‐micrometer) nanofiber pieces due to strong adhesive forces.