We synthesised Indium phosphide (InP) quantum dots (QDs) with different shell layer. We demonstrate highly fluorescent labeling of cell lines after nonspecific endocytosis of the QD. With spin-trap electron paramagnetic resonance (EPR) spectroscopy and reporter assays we determined the nature of reactive oxygen species generated. The sulforodhamine B (SRB) viability assay indicates very low cytotoxicity in all cell line tested. These data indicate that straightforward methods of synthesis and solubilization result in InP QDs that are a viable alternative to cadmium-containing particles for biological applications.
Journal: TechConnect Briefs
Volume: 3, Nanotechnology 2011: Bio Sensors, Instruments, Medical, Environment and Energy
Published: June 13, 2011
Pages: 133 - 136
Industry sectors: Advanced Materials & Manufacturing | Medical & Biotech
Topicss: Diagnostics & Bioimaging, Materials Characterization & Imaging