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Charge density alterations in human hair fibers: an investigation using electrostatic force microscopy
Author(s) -
Longo V. M.,
Monteiro V. F.,
Pinheiro A. S.,
Terci D.,
Vasconcelos J. S.,
Paskocimas C. A.,
Leite E. R.,
Longo E.,
Varela J. A
Publication year - 2006
Publication title -
international journal of cosmetic science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 62
eISSN - 1468-2494
pISSN - 0142-5463
DOI - 10.1111/j.1467-2494.2006.00280.x
Subject(s) - charge density , electrostatic force microscope , polymer , surface roughness , surface charge , fiber , materials science , microscopy , atomic force microscopy , chemistry , nanotechnology , optics , composite material , physics , quantum mechanics
Synopsis A new method for high‐resolution analyses of hair surface charge density under ambient conditions is presented in this paper. Electrostatic force microscopy (EFM) is used here to analyze changes in surface charge density in virgin hair, bleached hair, and hair treated with a cationic polymer. The atomic force microscopy technique is used concomitantly to analyze morphological changes in hair roughness and thickness. The EFM images depict exactly how the polymer is distributed on the surface of the hair fiber. The EFM's powerful analytical tools enabled us to evaluate the varying degrees of interaction between the hair fiber surface charge density and the cationic polymer. The surface charge density and the polymer's distribution in the hair fibers are presented in the light of EFM measurements.