Influence of coumarin as an additive on CuO nanostructures prepared by successive ionic layer adsorption and reaction (SILAR) method

Abstract

The effect of coumarin doping during the growth of CuO nanostructures by SILAR method has been studied. It was found that coumarin considerably influences the growth process, manipulates the bandgap and modifies the crystallite size of the films. XRD experiments evidenced that with higher coumarin concentrations in the growth solution, the microstrain and dislocation density increased, while the crystallite size of the films decreased. SEM images revealed that the thicknesses of the plate-like nanostructures decreased with increasing coumarin concentration. By UV/vis spectrophotometer analysis it is found that the coumarin concentration affects both the optical band gap and the transmission rate: both the band gap and spectral transmittance values of the films decreased for higher coumarin content. © 2013 Elsevier B.V. All rights reserved

The effects of coumarin additive on the properties of CdS thin films grown by chemical bath deposition

“…5b). A similar behaviour has been observed in chemically grown copper oxide thin films with coumarin additive by Bayansal et al [20]. They suggested that coumarin as an additive can be …”

“…According to Table 1, it can be seen that crystallite size of both as-deposited and annealed films decrease with increasing coumarin content. As reported in literature [19][20][21], coumarin makes the grains smaller and uniform [21]. Thus, the decreasing in the average crystallite size may be attributed to the increasing coumarin presence in the growth solution.…”

“…Additives used in aqueous solution growth methods, generally refine the grain size and control the surface morphology and crystal structure [15][16][17][18][19][20][21]. The additives present in the growth solution also influences physical and mechanical properties such as grain size, brightness, internal stress, pitting, corrosion behavior and even chemical composition.…”

“…It considerably refines the grain and makes the grains more uniform [19][20][21]. It is well known that the properties of CdS depend on both size and morphology of the particles.…”

Hydration detection through use of artificial sweat in doped- and partially-doped nanostructured CuO films

“…CuO films have been produced by the electro-deposition method [9], wet chemistry [10], sol-gel dip-coating [11] and successive ionic layer adsorption and reaction (SILAR) [12]. As compared to other methods, SILAR offers a very easy, cheap, and efficient strategy which can be performed in low temperatures [13].…”