First combined electron paramagnetic resonance and FT-IR spectroscopic evidence for reversible O2 adsorption on In2O3-x nanoparticles

Siedl N, Gügel P, Diwald O (2013)

Publication Language: English

Publication Status: Published

Publication Type: Journal article, Original article

Publication year: 2013

Journal

Journal of Physical Chemistry C American Chemical Society

Book Volume: 117

Pages Range: 20722-20729

Journal Issue: 40

DOI: 10.1021/jp4069834

Abstract

Adsorption-induced electronic property changes determine the performance of nanostructured transparent conductive oxides and sensor materials. For the study of O2 adsorption on electron rich In2O3-x nanoparticles we used transmission FT-IR spectroscopy in combination with electron paramagnetic resonance (EPR). The reversible emergence and annihilation of conduction band electrons is subject to O2 adsorption and was tracked at different oxygen pressures via IR active Drude absorptions. Corresponding results were related to EPR measurements that were performed under identical experimental conditions. For the first time we identified a weak adsorption complex between O2 and the surface of In2O 3-x nanoparticles in the temperature range between T = 90 K and T = 298 K. Complementing and supporting our FT-IR observations, this evidence opens the way to study sensing relevant adsorption processes at room temperature with spectroscopy.

Authors with CRIS profile

Nicolas Siedl Professur für Partikelsynthese Philipp Gügel Lehrstuhl für Partikelsynthese (LFG) Oliver Diwald Professur für Partikelsynthese

How to cite

APA:

Siedl, N., Gügel, P., & Diwald, O. (2013). First combined electron paramagnetic resonance and FT-IR spectroscopic evidence for reversible O2 adsorption on In2O3-x nanoparticles. Journal of Physical Chemistry C, 117(40), 20722-20729. https://doi.org/10.1021/jp4069834

MLA:

Siedl, Nicolas, Philipp Gügel, and Oliver Diwald. "First combined electron paramagnetic resonance and FT-IR spectroscopic evidence for reversible O2 adsorption on In2O3-x nanoparticles." Journal of Physical Chemistry C 117.40 (2013): 20722-20729.

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