Search for "carbon onions" in Full Text gives 4 result(s) in Beilstein Journal of Nanotechnology.
Beilstein J. Nanotechnol. 2018, 9, 1050–1074, doi:10.3762/bjnano.9.98
Beilstein J. Nanotechnol. 2016, 7, 758–766, doi:10.3762/bjnano.7.67
Beilstein J. Nanotechnol. 2015, 6, 1708–1711, doi:10.3762/bjnano.6.174
Beilstein J. Nanotechnol. 2014, 5, 1980–1998, doi:10.3762/bjnano.5.207