Zinc oxide (ZnO) nanoparticles are under investigation for the synthesis of materials with tunable magnetic and electric properties and for possible medical applications in cancer therapy. In this study, a sample of thiol-capped ZnO nanoparticles was studied by simultaneous thermogravimetry (TG) and differential scanning calorimetry (DSC) using a NETZSCH STA 449 F1 Jupiter® thermal analyzer.