Abstract:
:The piezoelectric properties of single collagen type I fibrils in fascia were imaged with sub-20 nm spatial resolution using piezoresponse force microscopy. A detailed analysis of the piezoresponse force microscopy signal in controlled tip-fibril geometry revealed shear piezoelectricity parallel to the fibril axis. The direction of the displacement is preserved along the whole fiber length and is independent of the fiber conformation. It is shown that individual fibrils within bundles in skeletal muscle fascia can have opposite polar orientations and are organized into domains, i.e., groups of several fibers having the same polar orientation. We were also able to detect piezoelectric activity of collagen fibrils in the high-frequency range up to 200 kHz, suggesting that the mechanical response time of biomolecules to electrical stimuli can be approximately 5 micros.
journal_name
Biophys Jjournal_title
Biophysical journalauthors
Harnagea C,Vallières M,Pfeffer CP,Wu D,Olsen BR,Pignolet A,Légaré F,Gruverman Adoi
10.1016/j.bpj.2010.02.047subject
Has Abstractpub_date
2010-06-16 00:00:00pages
3070-7issue
12eissn
0006-3495issn
1542-0086pii
S0006-3495(10)00327-9journal_volume
98pub_type
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