Fourier Transform Infrared (FTIR) Analysis of Copper Oxide Thin Films Prepared by Metal Organic Chemical Vapor Deposition (MOCVD)

Abstract

FTIR results from cuprous oxide (Cu2O) and cupric oxide (CuO) films prepared by MOCVDtechnique were presented. According to FTIR and XRD results, Cu2O films can be prepared by MOCVD using 0.20 tort of copper acetylacetonate (Cu(acac)2) vapor and 150 torn of oxygen, at a deposition temperature of 340°C. The strong reductive tendency of Cu(acac)2 vapor in the MOCVD process is noted, as the oxidation state of copper was reduced from 2+ in Cu(acac)2 to 1+ in the Cu2O film. Cu2O films have a strong IR absorption band at 610 cm−1. CuO films were prepared at 0.20 tort of Cu(acac)2 vapor and 190 torr of oxygen, at a deposition temperature of 420°C. The IR bands of CuO films located at 440 cm−1, 480cm−1, and 540cm−1. The XRD results indicated that Cu2O films have a preferential orientation at (111) plane. From IR study, it appears that the MOCVD processing condition has an impact on the film microstructure, which in term influenced the band position and band shape of corresponding IR bands.

Accessing copper selenide nanostructures through a 1D coordination polymer of copper(ii) with 4,4′-dipyridyldiselenide as a molecular precursor

“…S2, ESI†) shows bands at 491 and 629 cm −1 characteristic of Cu–N and Cu–O stretching vibrations, respectively. 39 The spectra also reveal characteristic bands at 683 cm −1 (COO symmetric bending), 821 cm −1 (C–C stretching), 1011–1225 cm −1 (C–O stretching), 1431 and 1482 cm −1 (CC stretching), 1580 cm −1 (CN stretching in heteroaromatics), and 1618 cm −1 (C = O stretching), which are in good agreement with literature values for similar types of complexes. 40…”

Thermal oxidation of carbon monoxide in air using various self-prepared catalysts

“…The peak at 470 cm −1 is attributed to Mn 4+ in octahedral structure while peak at 475 cm −1 is assigned to the oxygen transfer 12 . The oscillation of Cu-O were observed at peaks of 430, 439, and 461 cm −1 for CuO/OMS-2 sample 13,14 . These peaks were also found in FTIR spectra of CuO-MnOx/OMS-2 but with lower intensity, indicating lower amount of copper oxide on the OMS-2 surface.…”

Cumene Hydroperoxide-Induced Epoxidation of Styrene Using Cu2O and PbO as Catalysts

“…However, drying of the washed samples was found to be able to remove the substances practically completely. On repeated usage of the catalyst, the characteristic peak of Cu 2 O (Cu−O bond stretching) at ∼610 cm –1 was found to be merged with other peaks (∼500 to 550 cm –1 ). These peaks can be attributed to the formation of CuO, as the characteristic Cu−O bond response of CuO emerges at 480 and 540 cm –1 .…”