OICC Press Journal of Nanostructure in Chemistry 2193-8865 11 4 (December 2021) 2021 02 07 Synthesis and characterization of Au and Bi2O3 decorated Fe3O4@PAMAM dendrimer nanocomposites for medical applications 10.1007/s40097-021-00386-w EN Nurdan Kurnaz Yetim Department of Chemistry, Faculty of Arts and Sciences, Kırklareli University, Kırklareli, TR Fatma Kurşun Baysak Department of Chemistry, Faculty of Arts and Sciences, Kırklareli University, Kırklareli, TR Mümin Mehmet Koç School of Medical Service, Kırklareli University, Kırklareli, TR Dilek Nartop Department of Polymer Engineering, Faculty of Technology, Düzce University, Düzce, TR Journal Article 2021 02 07 Abstract Fe 3 O 4 magnetic nanoparticles were produced and covered with TEOS and APTES which were known to reduce the toxic properties of nanoparticles. Nanoparticles were functionalized second-generation PAMAM dendrimers and doped with Au and Bi 2 O 3 nanoparticles where Fe 3 O 4 @G2/Au/Bi 2 O 3 nanocomposites were obtained for potential multimodal imaging applications. Physicals structures of the nanocomposites were characterized using SEM and TEM which illustrate that nanoparticles were in composite form. Chemical composition of nanostructures was confirmed using EDX and FTIR. Magnetic characteristics were checked using VSM. It was seen that nanoparticles have superparamagnetic properties which indicate that nanocomposites have potential to be used in MRI and magnetic hyperthermia applications. X-ray imaging properties were confirmed using X-ray imaging and CT imaging. It was confirmed that doping nanoparticles with Au and Bi 2 O 3 nanoparticles significantly enhanced the X-ray tomography contrast enhancement properties which illustrate the theranostic properties of the nanocomposites.