1. Engineering for Heath Research Centre, College of Engineering & Physical Sciences, Aston University, Birmingham B4 7ET, United Kingdom
2. Embrapa Instrumentation, Nanotechnology National Laboratory for Agriculture, XV de Novembro, 1452, Sao Carlos 13560-970, Brazil
3. Department of Chemistry, Aeronautics Institute of Technology, Praça Marechal Eduardo Gomes 50, Vila das Acacias, São José dos Campos, São Paulo 12228-900, Brazil
4. Department of Functional and Structural Biology, State University of Campinas, Campinas13083-970, Sao Paulo, Brazil