Synthesis of Mn2+ and Pr3+ co-doped Zn2GeO4-graphene quantum dot nanorod bundles as an optical probe for sensing pH and temperature and for information encryption

This paper reports the synthesis of a Mn 2+ and Pr 3+ co-doped Zn 2 GeO 4 optical probe by introducing boron-doped and histidine- and serine-functionalized graphene quantum dots (BHS-GQD) to Mn 2+ /Pr 3+ -Zn 2 GeO 4 .