Superconductivity in Ag implanted Au thin film

Dalai, M. K.; Singh, Braj Bhusan; Sethy, Salila Kumar; Sahoo, Sarmila; Bedanta, Subhankar

doi:10.1016/j.physb.2020.412607

Cited by 5 publications

(3 citation statements)

References 45 publications

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“…However, after more detailed work on the magnetic, electrical and optical properties of these samples from the same group, [46] the authors changed their claim of room temperature superconductivity to 'observation of enhanced diamagnetism' in the Ag-Au nanostructures. Around the same time, similar kinds of work were reported on Au-Ag nanostructures grown by other techniques from other groups in India, though none reported the high T c observed by Thapa et al [47]. However, this work garnered a lot of attention in the community and triggered a lot of excitement and several groups in the world started working to verify the results.…”

Section: Introductionsupporting

confidence: 57%

A review of superconductivity in nanostructures—from nanogranular films to anti-dot arrays

Bose¹

2023

Supercond. Sci. Technol.

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Superconductivity in small particles has been studied since the early sixties. A large number of sample geometries for both one component elemental superconductors and dual component nano-composites having elemental superconducting particles dispersed in non-superconductng matrix have been explored which has helped us to understand the mechanism of the evolution of the superconducting transition temperature (Tc) with decreasing particle size. In this article, we review the work done in nano-structured superconductors from nano-granular films to these dual component superconducting nano-composites. In addition, we also present the experimental work done in superconducting films with periodic array of nano-sized holes showing the interesting property of vortex matching effect (VME) and try to understand the dominant mechanism for this phenomena.

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Section: Introductionsupporting

confidence: 57%

A review of superconductivity in nanostructures—from nanogranular films to anti-dot arrays

Bose¹

2023

Supercond. Sci. Technol.

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“…Ag-Au alloys in the form of nanoprisms have been shown to be effective catalysts in the reduction in 4-nitrophenol by NaBH 4 [8], which show that these systems are capable of transferring electrons, hence bringing about a reaction that does not occur at all without these particles. Another recent finding about the electron transfer by Au-Ag alloys reveals that such systems may, under appropriate synthesis conditions, exhibit superconductivity [9].…”

Section: Introductionmentioning

confidence: 99%

Activity of Ag/CeZrO2, Ag+K/CeZrO2, and Ag-Au+K/CeZrO2 Systems for Lean Burn Exhaust Clean-Up

Iwanek

Liotta

Williams³

et al. 2021

Catalysts

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Herein, the activity of Ag and bimetallic Au-Ag catalysts, supported over Ce0.85Zr0.15O2 (CZ), was investigated in a complex stream, whose components included CO, C3H8, NO, O2, and, optionally, an injection of water vapor. In such a stream, three of the possible reactions that can occur are CO oxidation, propane combustion, and NO oxidation. The aim of these studies was to explore whether silver, due to its strong affinity to oxygen, will counteract the stabilization of oxygen by potassium. The effect of the presence of potassium ions on the activity of the monometallic silver catalysts is beneficial in the complex stream without water vapor in all three studied reactions, although it is negligible in the model CO stream. It has been shown that water vapor strongly suppresses the activity of the Ag+K/CZ catalyst, much more so than that of the Ag/CZ catalyst. The second purpose of the work was to determine whether the negative effect of potassium ions on the activity of nanogold catalyst can be countered by the addition of silver. Studies in a model stream for CO oxidation have shown that, for a catalyst preloaded with gold, the effect of potassium is nulled by silver, and the activity of AuAg + 0.15 at%K/CZ and AuAg + 0.30 at%K/CZ is the same as that of the monometallic Au catalyst. Conversely, when the reaction is carried out in a complex stream, containing CO, C3H8, NO, O2, and water vapor, the presence of water vapor leads to higher CO conversion as well as increased NO2 formation and slightly suppresses the C3H8 combustion.

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“…Electrical properties of the silver-gold bimetallic system have generated significant scientific interest [2][3][4][5][6][7][8][9]. In our own investigations, we have observed emergent electrical, magnetic and optical properties in Au-Ag nanostructures that comprise of ~1 nm Ag clusters embedded into an Au matrix that distinguish these materials from other Au, Ag structures.…”

Section: Introductionmentioning

confidence: 99%

Simplified Colloidal Method to Produce Nanostructured Au-Ag Films with Superconductivity in the Ambient

Saha¹,

Mahadevu²,

Mondal³

et al. 2021

Preprint

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Superconductivity in Ag implanted Au thin film

Cited by 5 publications

References 45 publications

A review of superconductivity in nanostructures—from nanogranular films to anti-dot arrays

A review of superconductivity in nanostructures—from nanogranular films to anti-dot arrays

Activity of Ag/CeZrO2, Ag+K/CeZrO2, and Ag-Au+K/CeZrO2 Systems for Lean Burn Exhaust Clean-Up

Simplified Colloidal Method to Produce Nanostructured Au-Ag Films with Superconductivity in the Ambient

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