1. Department of Bioengineering, The University of Texas at Dallas, Richardson, Texas 75080, United States
2. Department
of Chemistry, Federal University of Santa Maria, Santa Maria, Rio Grande do Sul 97105-900, Brazil
3. Centro de Tecnologias Estratégicas do Nordeste
(CETENE), Microscopia Eletrônica e Nanotecnologia, Recife, Pernambuco 50740540, Brazil