原子間力顕微鏡による毛髪の微細構造と物性の研究 [in Japanese] Study of Fine-structures and Mechanical Properties of Human Hair by using Atomic Force Microscopy [in Japanese]
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The hair has a complicated hierarchical structure which is composed of hydrophobic and hydrophilic components. Study of the mechanical properties of each components is important in order to understand the structure of the hair microscopically and to develop hair care products. The objects of this study are to evaluate the mechanical properties and fine structures of human hair at the same point and under the natural environment by taking the advantages of Atomic Force Microscopy (AFM). The force-curve method using stiff cantilevers in order to deform a sample by AFM enable us to evaluate Young's modulus and a fine structure simultaneously at the same point. In this study, we applied this method also to the cross section of the hair in order to evaluate the degree of hair damage. In an application we found that the Young's modulus was improved when the damaged hair was treated by L-theanine solution and that especially Young's modulus of macrofibril was recovered. This method is thus very useful to appraise the effectiveness of hair care components.
- J. Surf. Sci. Soc. Jpn.
J. Surf. Sci. Soc. Jpn. 29(7), 427-431, 2008-07-10
The Surface Science Society of Japan