1. Department of Dental Materials and Prosthodontics; Ribeirão Preto Dental School University of São Paulo, (USP) São Paulo Brazil
2. Department of Materials Engineering Federal University of São Carlos, (UFScar) São Carlos Brazil
3. Institute for Complex Materials Leibniz Institute for Solid State and Materials Research, (IFW) Dresden Germany
4. Physics Department; Faculty of Philosophy Sciences and Letters of Ribeirão Preto, University of São Paulo, (USP) São Paulo Brazil