Search for "contrast agent" in Full Text gives 28 result(s) in Beilstein Journal of Nanotechnology.
Beilstein J. Nanotechnol. 2014, 5, 2267–2274, doi:10.3762/bjnano.5.236
Beilstein J. Nanotechnol. 2014, 5, 2259–2266, doi:10.3762/bjnano.5.235
Beilstein J. Nanotechnol. 2014, 5, 249–257, doi:10.3762/bjnano.5.27