Supporting Information for Polymerizable Supramolecular Approach to Fabricating Patterned Magnetic Nanoparticles

Joosub Lee,† Ki-Seung Seo,† Chan Woo Lee, ‡ and Jong-Man Kim*,†, ‡ † Department of Chemical Engineering, Hanyang University, Seoul 133-791, Korea ‡ Institute of Nanoscience and Technology, Hanyang University, Seoul 133-791, Korea e-mail: [email protected] Materials and Instruments. 10,12-Pentcosadiynoic acid (PCDA) was purchased from GFS Chemicals. The rest of chemicals used were purchased from Sigma-Aldrich. The optical images of the samples were taken using an Olympus (BX51 W/DP70) microscope. Scanning electron microscope (SEM) images and Energy dispersive X-ray spectroscopy (EDX) were obtained using a JEOL (JSM6330F) FE-SEM at an accelerating voltage of 15 kV. Each sample was coated with Pt for 30 s before analysis. Transmission electron microscopy (TEM) images were recorded using a JEOL JEM-2100 (performed at 120 kV). FTIR spectra were recorded on a MAGNa-IR ESP (Thermo Fisher Scientific, Inc.). Film thicknesses were measured using an alpha step instrument. 1H and 13C NMR spectra were recorded on a Varian Unitylnova (300 MHz) spectrometer. X-ray diffractometer (XRD) spectra were obtained using a Rigaku M2500 (40 kV, 100 mA, λ = 1.54 A). UV-Vis spectra were obtained using a single beam Agilent 8453 UV-visible spectrophotometer. Thermogravimetric analysis (TGA) was obtained using Bruker TG-DTA 2000SA. Hysteresis curve was obtained using Vibrating sample magnetometer (VSM) Lakeshore 735. Atomic force microscopy (AFM) was obtained using a XE-100 with a scan rate of 0.5 Hz and 0 V tip bias. Scans were performed in a noncontact mode. Calcination was done using a Digital Program Muffle Furnace CRFH13-P (Cerin Ceramics Co.). Preparation of PCDA-coated magnetite nanoparticles. PCDA-coated magnetite (Fe3O4) nanoparticles were synthesized as follows. Iron(III) chloride hexahydrate (FeCl3•6H2O, 0.54 g, 2.0