1：Experimental Design and Method Selection:

The synthesis of Janus shaped silver-magnetite nanoparticles is carried out in two steps: formation of magnetite in single phase emulsion solution and silver integration of obtained magnetite nanoparticles via the co-precipitation method.

2：Sample Selection and Data Sources:

The salts ferrous and ferric ammonium sulfates were weighed in the ratio 1:2 and dissolved in aqueous sulphuric acid. Another solution containing a pre-determined molar concentration of sodium hydroxide and cetyltrimethylammonium bromide (CTAB) introduced as surfactant was prepared.

3：List of Experimental Equipment and Materials:

X-ray diffractometer (Rigaku, Japan), transmission electron microscopy (FEI TECNAI G2 20 TWIN Type), dynamic light scattering particle size analyzer (Horiba Scientific nanopartica SZ-100 series), UV–visible spectrophotometer (Hitachi, U-3010), fluorescence spectrometer (Hitachi F-4600).

4：0). Experimental Procedures and Operational Workflow:

4. Experimental Procedures and Operational Workflow: The magnetite nanoparticles are obtained as black suspended mass which is washed and separated using ultrasonication and centrifugation. The nanoparticles are then dried at reaction temperature in vacuum for another 24 h. The silver-magnetite nanoparticles are washed and separated from the solution. The nanoparticles obtained are dried at reaction temperature i.e. 50 °C in vacuum.

5：Data Analysis Methods:

The analysis of XRD patterns indicates the formation of cubic spinel magnetite nanoparticles in pure phase. The size distribution and average particle size of the uncoated and silver-magnetite nanoparticles were obtained by measuring size of nearly 200 particles using TEM micrographs.