Copper (I) acetate (97 %), zinc acetate (99 %), oleic acid (90 %), oleylamine (70 %), 1-octadecene (ODE, 90 %), poly(maleic anhydride-alt-1-octadecene) (PMAO) (average Mn 30,000–50,000 as a powder), 3-(dimethylamino)-1-propylamine (DMAPA) (99 %), methyl iodide (99 %), poly-D-lysine, and gelatin were purchased from Sigma-Aldrich. Indium (III) acetate (99.99 %) and 1-dodecanethiol (DDT, 98 %) were purchased from Alfa Aesar. RPMI-1640 and MEM media were from Corning Cellgro. Heat-inactivated fetal bovine serum(FBS) was from Gibco. Fluorescein diacetate/propidium iodide (FDA/PI) was from Invitrogen. Dulbecco’s phosphate-buffered saline (DPBS) was from Fisher Scientific. U-87 MG and HEK-293 cells were ordered from ATCC. Chemicals were used as received without further purification.
The ultraviolet and visible (UV–Vis) spectra of QDs in organic solvents and aqueous solutions were obtained with a UV–Vis spectrometer (UV-2450 from Shimadzu) using cuvettes with a path length of 1 cm. Photoluminescence spectra were acquired using a spectrophotometer (RF-5301PC from Shimadzu). Infrared (IR) spectra of polymers and QDs were collected using a FT-IR spectrometer (Perkin-Elmer Frontier) equipped with attenuated total reflectance and measurement software (Spectrum 10). Particle size measurements of QDs were made using a ZetaPALS dynamic light scattering detector (Brookhaven Instruments Corp.).
The ultraviolet and visible (UV–Vis) spectra of QDs in organic solvents and aqueous solutions were obtained with a UV–Vis spectrometer (UV-2450 from Shimadzu) using cuvettes with a path length of 1 cm. Photoluminescence spectra were acquired using a spectrophotometer (RF-5301PC from Shimadzu). Infrared (IR) spectra of polymers and QDs were collected using a FT-IR spectrometer (Perkin-Elmer Frontier) equipped with attenuated total reflectance and measurement software (Spectrum 10). Particle size measurements of QDs were made using a ZetaPALS dynamic light scattering detector (Brookhaven Instruments Corp.).