Effects of oxygen percentage on the growth of copper oxide thin films by reactive radio frequency sputtering

Influence of oxygen flow rate in CuO

“…It was indicated that the higher oxygen flow rate, the smaller the crystallite size in the nano-crystalline CuO thin films. A similar trend of chancing of crystallite size was observed with increased oxygen flow rate [10].…”

Bipolar resistive switching characteristics in CuO/ZnO bilayer structure

“…This phenomenon may be due to low power and sufficient oxygen we provided in the preparation process. 15 Fig. 2 shows a typical XPS fitted profile of Cu 2p and O1s peaks.…”

Nanostructured copper and copper oxide thin films fabricated by hydrothermal treatment of copper hydroxide nitrate

“…The optical band gap (E g ) was calculated by the following formula using the absorption spectra of the SiO 2 /copper oxide thin films in the range of 250-800 nm [15,25].…”

“…where A is absorbance, B is due to a characteristic of the material and the exponent n is either 1/2 (for allowed non-direct transition) or 2 (for allowed direct transition), h is Planck's constant and υ is absorption frequency [15]. The optical band gap of the SiO 2 /copper oxides were determined by extrapolating the linear portion of the plots (Ahυ) n versus hυ at (Ahυ) n = 0 for n = 2 (Fig.…”

“…For instances, in fabrication and packaging the microelectronics, especially in integrated circuits (ICs) and mechanical/electrical micro systems (MEMSs), copper thin films as the excellent conductors are extensively used. So far, for fabrication of thin films on various substrates, several methods such as chemical vapor deposition (CVD), sol-gel, pulsedlaser deposition, electro-deposition, magnetron sputtering of a target, wet chemical routes and other methods were used [11][12][13][14][15][16][17]. It is well known that the surface properties such as adhesion, wettability, surface reactivity and catalytic activity are related to the development of a homogeneous thin film on the base material surface.…”