| 초록 |
The level of Cu2+ plays a critical role in human body, especially during pathological events such as Wilson disease, Menkes disease, and Alzheimer's disease. Simple and inexpensive methods, therefore, for simultaneous detection or monitoring of Cu2+ in few milimolar concentrations would be desirable. Porous silicon was suggested to be used as a sensor for Cu2+ because of its optical quenching effect resulted from the binding of Cu2+ to the surface dangling bonds. In our study, porous silicon nanoparticles (pSiNPs) were prepared by anodic etching of used Si wafers. pSiNPs displayed stable fluorescence property and strong photoluminescent intensity after hydrosilylation of particle surface with undecylenic acid (UDA) or acrylic acid (AA). We observed pSiNPs were quenched selectively depending on the concentration of neighboring copper ions. In sum, alkyl terminated pSiNPs have a potential in detection and monitoring of Cu2+ in human body as an optical sensor. |
