title: Multi-instrument characterization of five nanodiamond samples: a thorough example of nanomaterial characterization.
abstract: Here, we report the most comprehensive characterization of nanodiamonds (NDs) yet undertaken. Five different samples from three different vendors were analyzed by a suite of analytical techniques, including X-ray photoelectron spectroscopy (XPS), time-of-flight secondary ion mass spectrometry (ToF-SIMS), inductively coupled plasma mass spectrometry (ICP-MS), diffuse reflectance infrared Fourier transform (DRIFT) spectroscopy, X-ray diffraction (XRD), transmission electron microscopy (TEM), electron energy loss spectroscopy (EELS), Brunauer-Emmett-Teller (BET) surface area measurements, and particle size distribution (PSD) measurements. XPS revealed the elemental compositions of the ND surfaces (83-87 at.% carbon and 12-14 at.% oxygen) with varying amounts of nitrogen (0.4-1.8 at.%), silicon (0.1-0.7 at.%), and tungsten (0.3 at.% only in samples from one vendor). ToF-SIMS and ICP showed metal impurities (Al, Fe, Ni, Cr, etc. with unexpectedly high amounts of W in one vendor's samples: ca. 900 ppm). Principal component analyses were performed on the ToF-SIMS and ICP data. DRIFT showed key functional groups (-OH, C=O, C-O, and C=C). BET showed surface areas of 50-214 m(2)/g. XRD and TEM revealed PSD (bimodal distribution and a wide PSD, 5-100 nm, for one vendor's samples). XRD also provided particle sizes (2.7-27 nm) and showed the presence of graphite. EELS gave the sp(2)/sp(3) contents of the materials (37-88% sp(3)). PSD measurements were performed via differential sedimentation of the particles (mean particle size ca. 17-50 nm). This comprehensive understanding should allow for improved construction of nanodiamond-based materials.
authors.affiliation: Department of Chemistry and Biochemistry, C100 Benson Science Building, Brigham Young University, Provo, UT, 84602, USA.
authors.forename: Bhupinder
authors.initials: B
authors.lastname: Singh
authors.affiliation: Department of Chemistry and Biochemistry, C100 Benson Science Building, Brigham Young University, Provo, UT, 84602, USA.
authors.forename: Stacey J
authors.initials: SJ
authors.lastname: Smith
authors.affiliation: Diamond Analytics, 1260 South 1600 West, Orem, UT, 84058, USA.
authors.forename: David S
authors.initials: DS
authors.lastname: Jensen
authors.affiliation: Advanced Abrasives Corporation, 7980 National Hwy, Pennsauken, NJ, 08110, USA.
authors.forename: Hodge F
authors.initials: HF
authors.lastname: Jones
authors.affiliation: Diamond Analytics, 1260 South 1600 West, Orem, UT, 84058, USA.
authors.forename: Andrew E
authors.initials: AE
authors.lastname: Dadson
authors.affiliation: Department of Chemistry and Biochemistry, C100 Benson Science Building, Brigham Young University, Provo, UT, 84602, USA.
authors.forename: Paul B
authors.initials: PB
authors.lastname: Farnsworth
authors.affiliation: Department of Physics and Astronomy, Brigham Young University, N283 ESC, Provo, UT, 84602, USA.
authors.forename: Richard
authors.initials: R
authors.lastname: Vanfleet
authors.affiliation: Department of Physics and Astronomy, Brigham Young University, N283 ESC, Provo, UT, 84602, USA.
authors.forename: Jeffrey K
authors.initials: JK
authors.lastname: Farrer
authors.affiliation: Department of Chemistry and Biochemistry, C100 Benson Science Building, Brigham Young University, Provo, UT, 84602, USA. mrlinford@chem.byu.edu.
authors.forename: Matthew R
authors.initials: MR
authors.lastname: Linford
keywords: DRIFT; Nanodiamond; TEM; ToF-SIMS; XPS; XRD