Search results for "Nanoparticles synthesi"

Development of conservation methods for the restoration of paper materials

Paper, one of the most common materials of Cultural Heritage, undergoes serious deterioration caused by physical, chemical and biological factors. One of the main causes of deterioration is the acidic and/or oxidative environment. The studies of deterioration and conservation of paper have been increasing and require further development of methods and treatments that can stabilize and strengthen the paper. Various conservation treatments are being applied to model and to historical paper by using different chemicals methods. Their effectiveness for conservation and restoration are under study. Internal and external factors degrade the paper by promoting various reaction pathways. The two mo…

Microwave radiation effect on the synthesis of cadmium sulphide nanoparticles in water in oil microemulsion: a preliminary study at different frequen…

2004

AbstractCadmium sulphide nanoparticles have been synthesised in water/sodium bis (2-ethylhexyl) sulfosuccinate (AOT)/n- heptane microemulsions kept at 30 °C by microwave irradiation coupled with water-cooling and in conventional thermostatic conditions at the same temperature. The study has been performed exposing the reaction media to microwave radiation at five different frequencies (2.45, 2.85, 8, 12 and 18 GHz). For each frequency, a suitable microwave exposure set-up has been assembled. During the growth process, the dimensions of the nanoparticles have been characterised by means of UV-Vis spectroscopy. At the end of the growth process, the surface morphology of the nanoparticles has …