1. Nanotechnology National Laboratory for Agriculture (LNNA), Embrapa Instrumentation, Rua XV de Novembro, 1452, São Carlos, São Paulo 13560-970, Brazil
2. Institute of Chemistry, University of Campinas (UNICAMP), Caixa Postal 6154, Campinas, São Paulo 13083-970, Brazil
3. Fine Instrument Technology (FIT), Rua Laura Villani Piovesan, 130, São Carlos, São Paulo 13563-652, Brazil
4. Department of Biochemistry, Institute of Chemistry, University of São Paulo (USP), Av. Prof. Lineu Prestes, 748, São Paulo, São Paulo 05508-000, Brazil