Photoionization threshold of eumelanosomes determined using UV free electron laser-photoelectron emission microscopy

Authors :: Samokhvalov, Alexander
Garguilo, Jacob
Yang, W.-C.
Edwards, Glenn S.
Nemanich, Robert J.
Simon, John D.
Source :: Journal of Physical Chemistry B. Oct 21, 2004, Vol. 108 Issue 42, 16334-16338
Publication Year :: 2004
Abstract: The application of UV-free electron laser photoelectron emission microscopy (UV-FEL PEEM) to measure the threshold photoelectron spectrum and photoionization potential for human eumelanosomes is described. The UV-FEL PEEM images collected on human eumalenasomes isolated from black hair show that the organelle is photoionized by UV-B radiation and the photoionization threshold is determined to be 4.6 plusmn 0.2eV.

Subjects :: Chemistry, Physical and theoretical -- Research
Ionization -- Research
Photoelectron spectroscopy -- Usage
Electrons -- Research
Chemicals, plastics and rubber industries

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