Effect of the annealing atmosphere on the layer interdiffusion in Pd/Ti/Pd multilayer stacks deposited on pure Ti and Ti-alloy substrates

Magogodi, Steven; Mtshali, C.; Halindintwali, S.; Khumalo, Z.M.; Mongwaketsi, N.; Cloete, Karen J.; Pieters, Caswell; Sook, Avesh; Donald, Earl Mc; Cummings, Franscious; Arendse, Christopher J.

doi:10.1016/j.nimb.2019.09.018

Cited by 4 publications

(4 citation statements)

References 24 publications

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“…Meanwhile, atomic intermixing can occur at the interface of Au and Pd. 20 When the atomic intermixing at the Au/Pd interface is intensive with a sufficient amount of Au adatoms, it can lead to the fully intermixed alloy stage. This will destroy the Pd NPs and the surface energy now will reconstruct for another optimum, resulting in a new configuration of large-alloy AuPd NPs, as shown in Figure 2.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

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MoS₂ Nanoflake and ZnO Quantum Dot Blended Active Layers on AuPd Nanoparticles for UV Photodetectors

Lin

Mandavkar

Kulkarni

et al. 2022

ACS Appl. Nano Mater.

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A hybrid UV photodetector incorporating a blended active layer of molybdenum disulfate (MoS 2 ) nanoflakes and zinc oxide (ZnO) quantum dots (QDs) on the Au core−shelled AuPd hybrid NPs (HNPs), namely, the MoS 2 *ZnO/HNP configuration, is demonstrated for the first time. In the proposed configuration, the hot carriers generated by the strong localized surface plasmon resonance (LSPR) of Au-shelled AuPd HNPs can be effectively collected at the ZnO QD's conduction band. The blended MoS 2 nanoflakes also successfully absorb the high-energy photons, offering additional photocarriers. The optimized device demonstrates an increased photocurrent (I ph ) of 1.49 × 10 −3 A at 10 V under 54.9 mW/mm 2 , which offers improved performance parameters of a photoresponsivity (R) of 2,525 mA/W, a detectivity (D) of 7.251 × 10 11 jones, and an external quantum efficiency (EQE) of 813% at 0.34 mW/mm 2 . The result is one of the best ZnO-based photodetectors demonstrated so far. The enhanced photocurrent is due to the greater photocarrier injections by the blended active layer of MoS 2 nanoflakes and ZnO QDs on the Au-shelled AuPd HNPs. The finite-difference time-domain (FDTD) simulation confirms the significantly increased maximum local e-field intensity and hotspots of the MoS 2 *ZnO/HNP blended active layer.

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Section: ■ Results and Discussionmentioning

confidence: 99%

“…This will result in the formation of Au shells on Pd NPs upon annealing. Meanwhile, atomic intermixing can occur at the interface of Au and Pd . When the atomic intermixing at the Au/Pd interface is intensive with a sufficient amount of Au adatoms, it can lead to the fully intermixed alloy stage.…”

Section: Resultsmentioning

confidence: 99%

MoS₂ Nanoflake and ZnO Quantum Dot Blended Active Layers on AuPd Nanoparticles for UV Photodetectors

Lin

Mandavkar

Kulkarni

et al. 2022

ACS Appl. Nano Mater.

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“…This is a technique which has been pioneered by among other labs, the iThemba LABS (formerly known as the National Accelerator Centre) in South Africa [24]. Magogodi et al [25] report of in-situ real-time RBS analysis of a 125 nm thick Pd/ Ti/Pd film stack to investigate diffusion kinetics and stoichiometric evolution under different annealing environments. This formed part of a study aimed at developing hydrogen storage materials.…”

Section: Real-time Rbs Analysis Of a Hydrogen Storage Pd/ti/pd Layer ...mentioning

confidence: 99%

“…Contour plots comparing the onset of reaction between atomic species in Pd/Ti/Pd layers annealed in (a) vacuum and in (b) hydrogen environments. (reproduced with permission from ref [25]…”

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confidence: 99%

Depth Profiling of Multilayer Thin Films Using Ion Beam Techniques

Msimanga¹

2023

Thin Films - Deposition Methods and Applications

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Functional properties of thin film structures depend a lot on the thickness and chemical composition of the layer stack. There are many analytical techniques available for the identification and quantification of chemical species of thin film depositions on substrates, down to a few monolayers thickness. For the majority of these techniques, extending the analysis to several tens of nanometres or more requires some form of surface sputtering to access deeper layers. While this has been done successfully, the analysis tends to become quite complex when samples analysed consist of multilayer films of different chemical composition. Ion beam analysis (IBA) techniques using projectile ions of energies in the MeV range have a demonstrated advantage in the study of multilayer thin films in that the analysis is possible without necessarily rupturing the film, up to over 500 nm deep in some cases, and without the use of standards. This chapter looks at theoretical principles, and some unique applications of two of the most widespread IBA techniques: Rutherford Backscattering Spectrometry (RBS) and Elastic Recoil Detection Analysis (ERDA), as applied to multilayer thin film analyses.

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Analysis of structural stability of Ar ion-implanted Pd/Zr/Pd/Ti/Pd multilayer stack in hydrogen annealing environment

Thethwayo,

Mtshali,

Khumalo

et al. 2024

Heliyon

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Effect of the annealing atmosphere on the layer interdiffusion in Pd/Ti/Pd multilayer stacks deposited on pure Ti and Ti-alloy substrates

Cited by 4 publications

References 24 publications

MoS₂ Nanoflake and ZnO Quantum Dot Blended Active Layers on AuPd Nanoparticles for UV Photodetectors

MoS₂ Nanoflake and ZnO Quantum Dot Blended Active Layers on AuPd Nanoparticles for UV Photodetectors

Depth Profiling of Multilayer Thin Films Using Ion Beam Techniques

Analysis of structural stability of Ar ion-implanted Pd/Zr/Pd/Ti/Pd multilayer stack in hydrogen annealing environment

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Effect of the annealing atmosphere on the layer interdiffusion in Pd/Ti/Pd multilayer stacks deposited on pure Ti and Ti-alloy substrates

Cited by 4 publications

References 24 publications

MoS2 Nanoflake and ZnO Quantum Dot Blended Active Layers on AuPd Nanoparticles for UV Photodetectors

MoS2 Nanoflake and ZnO Quantum Dot Blended Active Layers on AuPd Nanoparticles for UV Photodetectors

Depth Profiling of Multilayer Thin Films Using Ion Beam Techniques

Analysis of structural stability of Ar ion-implanted Pd/Zr/Pd/Ti/Pd multilayer stack in hydrogen annealing environment

Contact Info

Product

Resources

About

MoS₂ Nanoflake and ZnO Quantum Dot Blended Active Layers on AuPd Nanoparticles for UV Photodetectors

MoS₂ Nanoflake and ZnO Quantum Dot Blended Active Layers on AuPd Nanoparticles for UV Photodetectors