Surface properties of modified nanodiamond on silicon via a spray method

The surface properties of nanodiamonds play a decisive role in many nanodiamond applications, particularly in biological and medical applications. The surface functional groups largely determine the interactions between nanodiamonds and biomolecules. In this study, a sonication treatment of nanodiamond powder was investigated upon depositing onto silicon substrate via a spray method. The surface morphology of nanodiamond deposited on silicon was observed using a Scanning Electron Microscopy (SEM) and Atomic Force Microscopy (AFM), respectively. Fourier Transform Infrared Spectroscopy (FTIR) was used in order to determine the difference between unmodified nanodiamond and modified nanodiamonds with APTES upon aptamer immobilization. The aptamer modified nanodiamond can be used for development of nano electronic device for detection of biomolecules.