Search for "upconverting nanoparticles" in Full Text gives 4 result(s) in Beilstein Journal of Nanotechnology.
Beilstein J. Nanotechnol. 2020, 11, 180–212, doi:10.3762/bjnano.11.15
Beilstein J. Nanotechnol. 2019, 10, 1324–1331, doi:10.3762/bjnano.10.131
Beilstein J. Nanotechnol. 2018, 9, 2916–2924, doi:10.3762/bjnano.9.270
Beilstein J. Nanotechnol. 2017, 8, 1815–1824, doi:10.3762/bjnano.8.183