Photoacoustic Spectroscopy of Biological Materials

Science  17 Aug 1973:
Vol. 181, Issue 4100, pp. 657-658
DOI: 10.1126/science.181.4100.657


A new technique for performing optical spectroscopy on solids has been developed. Photoacoustic spectra of cytochrome c and hemoglobin show how this technique can be used to obtain information about optical absorptions and subsequent de-excitations in solid biological materials, particularly those which cannot readily be studied by conventional means.