High spatial and temporal resolution measurement of mechanical properties in hydrogels by non-contact laser excitation

N. Hosoya, Y. Terashima, K. Umenai, S. Maeda

Research output: Contribution to journalArticle

  • 2 Citations

Abstract

Gels have received increased attention as potential materials for biological materials because they can exhibit similar mechanical properties. One obstacle for using gels is that their mechanical properties are significantly altered by defects, such as an inhomogeneous crosslink density distribution. If these defects could be detected and the values and spatial distributions of mechanical properties in the gel could be determined, it would be possible to apply gels for several fields. To achieve the high spatial and temporal resolution measurement of mechanical properties in hydrogels, in our method, a conventional contact excitation device is replaced with a non-contact excitation using laser ablation for the input and magnetic resonance elastography to measure stress waves is replaced with the Schlieren method with a high-speed camera. Magnetic resonance elastography is a local measurement technique, and consequently, requires a lot of time to characterize a sample, as well as does not have sufficient spatial resolution to obtain a broad range of elasticity coefficients of gels. We use laser ablation to apply non-contact impulse excitations to gels to generate stress waves inside them. We can determine mechanical properties of gels using the stress waves' propagation velocity.

LanguageEnglish
Article number095223
JournalAIP Advances
Volume6
Issue number9
DOIs
StatePublished - 2016 Sep 1

Fingerprint

temporal resolution
spatial resolution
gels
mechanical properties
high resolution
stress waves
excitation
lasers
laser ablation
magnetic resonance
high speed cameras
propagation velocity
defects
density distribution
impulses
wave propagation
spatial distribution
elastic properties
coefficients

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

High spatial and temporal resolution measurement of mechanical properties in hydrogels by non-contact laser excitation. / Hosoya, N.; Terashima, Y.; Umenai, K.; Maeda, S.

In: AIP Advances, Vol. 6, No. 9, 095223, 01.09.2016.

Research output: Contribution to journalArticle

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