Effect of Ag layer thickness and scan line spacing during laser annealing of Ag/F-doped SnO2 bilayer composite thin films under ultrasonic vibration assistance

In this study, X-ray photoelectron spectroscopy (XPS) was used to study chitosan–graphene oxide (chitosan–GO) incorporated with 4-(2-pyridylazo)resorcinol (PAR) and cadmium sulfide quantum dot (CdS QD) composite thin films for the potential optical sensing of cobalt ions (Co2+). From the XPS results, it was confirmed that carbon, oxygen, and nitrogen elements existed on the PAR–chitosan–GO thin film, while for CdS QD–chitosan–GO, the existence of carbon, oxygen, cadmium, nitrogen, and sulfur were confirmed. Further deconvolution of each element using the Gaussian–Lorentzian curve fitting program revealed the sub-peak component of each element and hence the corresponding functional group was identified. Next, investigation using surface plasmon resonance (SPR) optical sensor proved that both chitosan–GO-based thin films were able to detect Co2+ as low as 0.01 ppm for both composite thin films, while the PAR had the higher binding affinity. The interaction of the Co2+ with the thin films was characterized again using XPS to confirm the functional group involved during the reaction. The XPS results proved that primary amino in the PAR–chitosan–GO thin film contributed more important role for the reaction with Co2+, as in agreement with the SPR results.

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Design and fabrication of Pt-free FeNi2S4/rGO hybrid composite thin films counter electrode for high-performance dye-sensitized solar cells

Journal of Materials Science Materials in Electronics ◽

10.1007/s10854-021-05821-w ◽

2021 ◽

Author(s):

G. Sankar ◽

P. Anbarasu ◽

R. Mahendran ◽

K. Sambath ◽

K. Prammapriya

Keyword(s):

Thin Films ◽

Solar Cells ◽

Hybrid Composite ◽

High Performance ◽

Counter Electrode ◽

Dye Sensitized Solar Cells ◽

Composite Thin Films ◽

Dye Sensitized ◽

Sensitized Solar Cells

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Synthesis of Nanocomposite thin film Ti/Al Multilayers and Ti-Aluminides

MRS Proceedings ◽

10.1557/proc-457-309 ◽

1996 ◽

Vol 457 ◽

Author(s):

R. Banerjee ◽

X. D. Zhang ◽

S. A. Dregia ◽

H. L. Fraser

Keyword(s):

Thin Film ◽

Thin Films ◽

Magnetron Sputtering ◽

Layer Thickness ◽

Thermodynamic Model ◽

Interfacial Reactions ◽

Experimental Results ◽

Structural Transitions ◽

Nanocomposite Thin Film ◽

Multilayered Thin Films

ABSTRACTNanocomposite Ti/Al multilayered thin films have been deposited by magnetron sputtering. These multilayers exhibit interesting structural transitions on reducing the layer thickness of both Ti and Al. Ti transforms from its bulk stable hep structure to fee and Al transforms from fee to hep. The effect of ratio of Ti layer thickness to Al layer thickness on the structural transitions has been investigated for a constant bilayer periodicity of 10 nm by considering three different multilayers: 7.5 nm Ti / 2.5 nm Al, 5 nm Ti / 5 nm Al and 2.5 nm Ti / 7.5 nm Al. The experimental results have been qualitatively explained on the basis of a thermodynamic model. Preliminary experimental results of interfacial reactions in Ti/Al bilayers resulting in the formation of Ti-aluminides are also presented in the paper.

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