What Charge is my Hair?
It would be too simple to say that your hair is either positively or negatively charged. Some areas of the hair shaft are positive but other areas are negative (confused yet?) You may already know, but the outside of the hair is made up of little ‘plates’, the edges of which are negatively charged. Popular hair care brands have conditioners which contain cationic (negative charge-seeking) molecules designed to stick to these hair plate edges. With different areas of your hair having a different charge, either a positive or a negative fibre could bind to your hair. The difference between fibres should be measured by the charge strength or magnitude, plus whether it is dipolar or not – both of which we, at Nanogen, focus on