Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Detonation Nanodiamonds: A Comparison Study by Photoacoustic, Diffuse Reflectance, and Attenuated Total Reflection FTIR spectroscopies

Version 1 : Received: 29 November 2020 / Approved: 30 November 2020 / Online: 30 November 2020 (16:12:52 CET)

A peer-reviewed article of this Preprint also exists.

Volkov, D.S.; Krivoshein, P.K.; Proskurnin, M.A. Detonation Nanodiamonds: A Comparison Study by Photoacoustic, Diffuse Reflectance, and Attenuated Total Reflection FTIR Spectroscopies. Nanomaterials 2020, 10, 2501. Volkov, D.S.; Krivoshein, P.K.; Proskurnin, M.A. Detonation Nanodiamonds: A Comparison Study by Photoacoustic, Diffuse Reflectance, and Attenuated Total Reflection FTIR Spectroscopies. Nanomaterials 2020, 10, 2501.

Journal reference: Nanomaterials 2020, 10, 2501
DOI: 10.3390/nano10122501

Abstract

The qualitative analysis of nanodiamonds by FTIR spectrometry as photoacoustic (PAS), diffuse-reflectance (DRIFT), and attenuated total reflection (ATR) modalities was evaluated for rapid and nondestructive analysis and comparison of nanodiamonds. The spectra reproducibility and signal-gathering depth was compared. The assignment of characteristic bands showed that only six groups of bands were present in spectra of all the modalities with appropriate sensitivity: 1760 (C=O stretch, isolated carboxyl groups); 1640–1632 (H–O–H bend, liquid water); 1400–1370 (non-carboxyl C–O–H in-plane bend and CH2 deformation); 1103 (non-carboxyl C–O stretch); 1060 (in-plane C–H bend, non-aromatic hydrocarbons and carbohydrates); and 940 cm–1 (out-of-plane carboxyl C–O–H bend). DRIFT provides the maximum number of bands and is capable of measuring hydrogen-bonded bands and CHX groups. ATR provides the good sensitivity for water and C–H/C–C bands in the range 2000–400 cm–1. PAS-FTIR reveals less bands than DRIFT but more intense bands than ATR-FTIR and shows the maximum sensitivity for absorption bands that do not appear in ATR-IR spectra and are expedient for supporting either DRIFT or PAS along with depth-profiling. Thus, all three modalities are required for full characterization of nanodiamonds surface functional groups.

Subject Areas

detonation nanodiamonds; photoacoustic IR spectroscopy; diffuse-reflectance IR spectroscopy; attenuated total internal reflection IR spectroscopy

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