Article pubs.acs.org/JPCC
Surface Structure of Aerobically Oxidized Diamond Nanocrystals Abraham Wolcott,†,‡,§,⊥,% Theanne Schiros,∥ Matthew E. Trusheim,‡,§,⊥ Edward H. Chen,‡,§,⊥ Dennis Nordlund,# Rosa E. Diaz,& Ophir Gaathon,‡,§,⊥,% Dirk Englund,‡,§,⊥ and Jonathan S. Owen*,† †
Department of Chemistry, ‡Department of Electrical Engineering, §Department of Applied Mathematics and Applied Physics, and Energy Frontier Research Center, Columbia University, New York, New York 10027, United States ⊥ Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States # Stanford Synchrotron Radiation Light Source, SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States & Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, New York 11973, United States % Diamond Nanotechnologies Inc., Boston, Massachusetts 02134, United States ∥
S Supporting Information *
ABSTRACT: We investigate the aerobic oxidation of high-pressure, high-temperature nanodiamonds (5−50 nm dimensions) using a combination of carbon and oxygen K-edge X-ray absorption, wavelength-dependent X-ray photoelectron, and vibrational spectroscopies. Oxidation at 575 °C for 2 h eliminates graphitic carbon contamination (>98%) and produces nanocrystals with hydroxyl functionalized surfaces as well as a minor component (
