Physics – Condensed Matter – Soft Condensed Matter
Scientific paper
2005-04-06
Physics
Condensed Matter
Soft Condensed Matter
4 Page Letter
Scientific paper
10.1063/1.2009833
Photopyroelectric spectroscopy (PPE) was used to study the thermal and optical properties of electropolymerized melanins. The photopyroelectric intensity signal and its phase were independently measured as a function of wavelength, as well as a function of chopping frequency for a given wavelength in the saturation part of the PPE spectrum. Equations for both the intensity and the phase of the PPE signal were used to fit the experimental results. From the fittings we obtained for the first time, with great accuracy, the thermal diffusivity coefficient, the thermal conductivity and the specific heat of the samples, as well as a value for the condensed phase optical gap, which we found to be 1.70 eV.
de Albuquerque J. E.
Giacomantonio C.
Meredith Paul
White Angela
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