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Measuring microelastic properties of stratum corneum.

Authors
  • Yuan, Yonghui
  • Verma, Ritu
Type
Published Article
Journal
Colloids and Surfaces B Biointerfaces
Publisher
Elsevier
Publication Date
Mar 01, 2006
Volume
48
Issue
1
Pages
6–12
Identifiers
PMID: 16460919
Source
Medline
License
Unknown

Abstract

We explore the compression moduli of a thin biological tissue through probe microscopy. The elastic modulus (E') of isolated stratum corneum is measured at varying depths through the use of an atomic force microscope (AFM) as well as a nano-indentor (Hysitron Triboscope). In addition, a nano-DMA is used to measure visco-elastic properties. Measurements on dry and hydrated stratum corneum show an order of magnitude difference in E' and the measured tandelta (E''/E') is seen to increase from approximately 0.1 to 0.25. In addition, extensive validation of the experiments is conducted with different indentation probes at different force ranges to reveal the effects of indentor geometry and indentation depth on the measured elastic modulus. The sensitivity of the measurements is tested with applying known treatments to stratum corneum and exploring their effects on biomechanical parameters.

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