| AVS 64th International Symposium & Exhibition | |
| Nanometer-scale Science and Technology Division | Thursday Sessions |
| Session NS-ThP |
| Session: | Nanometer-scale Science and Technology Poster Session |
| Presenter: | Gary McGuire, Adamas Nanotechnologies, Inc. |
| Authors: | G. McGuire, Adamas Nanotechnologies, Inc. O.A. Shenderova, Adamas Nanotechnologies, Inc. N.J. Nunn, Adamas Nanotechnologies, Inc. |
| Correspondent: | Click to Email |
Dielectric barrier discharges are non-equilibrium plasmas which may operate at atmospheric-pressure avoiding the necessity of generating vacuum conditions. Operation at atmospheric pressure facilitates the introduction and surface functionalization of gram quantities of nanoparticles within minutes at room temperature as an alternative means to high temperature processes which typically takes hours. In this study nanodiamond particles of detonation origin were fluorinated using CF4. Surface analysis using x-ray photoelectron spectroscopy confirmed a fluorine concentration of up to ~4.5 at% of the nanodiamond particles surface. Fourier transform infrared spectroscopy revealed the presence of F-bands, related to CF3 - (CF2) stretching vibrations and symmetric and asymmetric CF2 vibrations. Fluorine surface functional groups can serve as a means for further chemical substitution reactions so that other, more complex functional groups such as amino acids, oligonucleotides, peptides, etc. can bond to the surface, facilitating material applications for biosensors. It has been demonstrated that an atmospheric pressure dielectric barrier glow discharge is a highly effective means to rapidly fluorinate, oxidize and aminate diamond surfaces.