A novel salt-assisted liquid-phase ultrasound exfoliation method in the preparation of GaSe nanosheets via Lambert-Beer obtaining rational design

Qi, Xiaofei; Ma, Weiqing; Ren, Zeyuan; Ding, Cong; Wang, Jiahao; Meng, Xue; Cao, Wenhan; Ma, Yingtong; Zhang, Jianing; Zhang, Chencheng; Qian, Hao; Ning, Tengge; Zhao, Wu

doi:10.1016/j.apsusc.2023.157815

Cited by 1 publication

(1 citation statement)

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“…From the results shown in figure 7, there is a discernible trend in which the transmittance reveals an upward trend that is accompanied by with a decrease in the number of cycles. This observation can be attributed to the thickness of the film which is known to increase with the increase in the number of cycles, as explained in the Beer-Lambert equation [78]. This equation is emblematic of the inversely proportional relationship between optical transmission and thickness, which is as follows:…”

Section: Optical Propertiesmentioning

confidence: 99%

Effect of film thickness on the electrical and the photocatalytic properties of ZnO nanorods grown by SILAR technique

Yousra,

Guettaf Temam,

Saâd

et al. 2023

Phys. Scr.

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In this work, Zinc oxide (ZnO) thin films were synthesised by the successive ionic layer adsorption and reaction (SILAR) technique at various number of cycles (10–50 cycles). The effect of film thickness on the structural properties, surface morphology, optical and electrical properties, and sunlight assisted photocatalytic activities through photocatalytic degradation of Methylene Blue (MB) dye of ZnO thin films were studied. The energy dispersive x-rays (EDX) analysis confirmed the presence Zn and O elements. The x-rays diffraction (XRD) pattern showed the polycrystalline nature of ZnO thin films and the crystallite size increases with film thickness. The SEM images showed that a greater film thickness resulted in the growth of hexagonal nanorods arrays. Atomic force microscopy (AFM) images revealed that the surface roughness increases with film thickness yielding in an enhanced specific surface area. The UV—visible transmission spectra showed that increasing film thickness results in band gap expansion from 3.15 eV to 3.31 eV together with a reduction in optical transmittance. The estimated sheet resistance and resistivity were found to be in the range of 1.34–7.1 Ω sq−1 and 0.09–2.12 ×10–1 Ω.cm. The photocatalytic studies reveal that increasing film thickness leads to an improved photocatalytic efficiency of ZnO films. The enhanced photocatalytic activity of ZnO films is due to the increased surface area and low recombination rate of carriers charges (e−/h+), resulting from band gap expansion.

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Section: Optical Propertiesmentioning

confidence: 99%