The experimental parameters accessible to photoacoustics include molecular volume change and photoreaction enthalpy change.
Harvey J.M. Hou, Thomas P. Sakmar 2010, 'Methodology of Pulsed Photoacoustics and Its Application to Probe Photosystems andReceptors', Sensorshttp://www.mdpi.com/1424-8220/10/6/5642/. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
Structural changes induced by the heat treatment were confirmed by analyzing the molecular volume determined from the sample density.
Su-Yeon Choi, Bong-Ki Ryu 2015, 'Nanocrystallization of Vanadium Borophosphate Glass for Improving the Electrical andCatalytic Properties', Journal of Nanomaterialshttp://dx.doi.org/10.1155/2015/201597. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)