1. Instituto de Fı́sica de São Carlos, Universidade de São Paulo, CP 369, 13560-970 São Carlos, SP, Brazil
2. Department of Radiology & Biomedical Imaging, School of Medicine, Yale University, New Haven, Connecticut 06520, United States
3. CNRS, Université Paris-Saclay, Inserm, 91405, Orsay, France
4. CNRS, Institut Curie, Inserm, 91401, Orsay, France
5. Universidade Estadual de Campinas, Instituto de Fı́sica “Gleb Wataghin”, Cidade Universitária Zeferino Vaz Barão Geraldo, 13083-859 Campinas, SP, Brazil
6. Nanomaterials Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Ikeda, Osaka 563-8577, Japan