Regensburg 2007 – scientific programme

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SYBM: Symposium Bioinspired Materials

SYBM 1: Symposium Bioinspired Materials

SYBM 1.5: Invited Talk

Thursday, March 29, 2007, 11:45–12:15, H1

Structural, Nanomechanical, and Nanotribological Characterization of Human Hair Using Atomic Force Microscopy and Nanoindentation — •Bharat Bhushan — The Ohio State University, Columbus, Ohio 43210 USA

Maintaining the health, feel, shine, color, softness, and overall aesthetics of the hair is highly desired. Hair care products such as shampoos and conditioners, along with damaging processes such as chemical dyeing and permanent wave treatments, affect the maintenance and grooming process and are important to study because they alter many hair properties. Nanoscale characterization of the cellular structure, mechanical properties, and morphological, frictional, and adhesive properties of hair are essential to evaluate and develop better cosmetic products, and to advance the understanding of biological and cosmetic science. Another property of interest is surface charge of hair which has a significant effect on manageability, feel, and appearance. Controlling charge buildup to improve these factors is an important issue in the commercial hair care industry. The atomic/friction force microscope (AFM/FFM) and nanoindenter have recently become important tools for studying the micro/nanoscale properties of human hair. In this talk, we present a comprehensive review of structural, mechanical, and tribological properties of various hair and skin as a function of ethnicity, damage, conditioning treatment, and various environments.