Gas-phase synthesis of nanoparticles: current application challenges and instrumentation development responses

Grammatikopoulos, Panagiotis; Bouloumis, Theodoros D.; Steinhauer, Stephan

doi:10.1039/d2cp04068a

Cited by 8 publications

(1 citation statement)

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“…Pt sensitisation was performed via the deposition of pre-formed nanoparticles by means of magnetron-sputtering inert-gas condensation – a versatile gas-phase method for the synthesis of nanoparticles with tuneable size, chemical composition, and morphology. 14,15 The effectiveness of this technique for realising high-performance conductometric gas sensors has been previously demonstrated for sensing layers based on Fe nanoparticles with well-defined cubic shapes, 16 for Pd nanoparticle-decorated CuO nanowire devices, 17 and for Ru nanoparticle-decorated CuO nanowire devices. 18 Recently, we demonstrated the decoration of SnO 2 thin films with ultrasmall Pt nanoparticles with an average diameter below 2 nm, resulting in carbon monoxide (CO) sensitivity with minimised humidity interference.…”

Section: Introductionmentioning

confidence: 99%

Adjusting surface coverage of Pt nanocatalyst decoration for selectivity control in CMOS-integrated SnO₂ thin film gas sensors

Sosada-Ludwikowska,

Reiner,

Egger

et al. 2024

Nanoscale Adv.

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Section: Introductionmentioning

confidence: 99%

Adjusting surface coverage of Pt nanocatalyst decoration for selectivity control in CMOS-integrated SnO₂ thin film gas sensors

Sosada-Ludwikowska,

Reiner,

Egger

et al. 2024

Nanoscale Adv.

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Ferromagnetic–Antiferromagnetic Coupling in Gas‐Phase Synthesized M(Fe, Co, and Ni)–Cr Nanoparticles for Next‐Generation Magnetic Applications

Bohra,

Giaremis,

et al. 2024

Advanced Science

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Combining ferromagnetic–antiferromagnetic materials in nanoalloys (i.e., nanoparticles, NPs, containing more than one element) can create a diverse landscape of potential electronic structures. As a result, a number of their magnetic properties can be manipulated, such as the exchange bias between NP core and shell, the Curie temperature of nanoparticulated samples, or their magnetocaloric effect. In this work, such a family of materials (namely M–Cr NPs where M is Fe, Co, Ni, or some combination of them) is reviewed with respect to the tunability of their magnetic properties via optimized doping with Cr up to its solubility limit. To this end, gas‐phase synthesis has proven a most effective method, allowing excellent control over the physical structure, composition, and chemical ordering of fabricated NPs by appropriately selecting various deposition parameters. Recent advances in this field (both experimental and computational) are distilled to provide a better understanding of the underlying physical laws and point toward new directions for cutting‐edge technological applications. For each property, a relevant potential application is associated, such as memory cells and recording heads, induced hyperthermia treatment, and magnetic cooling, respectively, aspiring to help connect the output of fundamental and applied research with current real‐world challenges.

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A Concentrically Moveable Erosion Zone Magnetron for In Operando Tailoring of Alloy Nanoparticles in a Gas Aggregation Source

Drewes,

Ziegler,

Morisch

et al. 2024

Part & Part Syst Charact

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One particularly interesting approach for the deposition of highly pure nanoparticles (NPs) in a solvent‐ and surfactant‐free process is the gas phase synthesis of nanoparticles using a gas aggregation source (GAS) based on magnetron sputtering. Apart from the possibility of tuning the NP size‐distribution via process parameters, e.g., gas flow, pressure, and aggregation length, multicomponent targets in a GAS enable in operando composition tuning of alloy NPs. However, in the practical application of the GAS, two main challenges have to be addressed: low target utilization and low conversion efficiency. This work describes a magnetron with a concentrically moveable erosion zone (cMEZ magnetron), and showcases its applicability for the deposition of metal (Cu) and metal alloy (CuNi) NPs via GAS. The cMEZ magnetron relies on an in operando reconfigurable outer magnet array, which enables tuning of the position of the erosion zone, impacting target utilization. By weighting the targets and substrates before and after deposition, the conversion efficiency is determined for different operating pressures and magnet configurations. Furthermore, the multicomponent target approach is tested with the cMEZ magnetron, which enabled the in operando composition tuning of the Ni content in CuNi NPs from ≈5 to ≈35 at% only by varying the magnetic field.

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Gas-phase synthesis of nanoparticles: current application challenges and instrumentation development responses

Abstract: Nanoparticles constitute fundamental building blocks required in several fields of application with current global importance. To fully exploit nanoparticle properties specifically determined by the size, shape, chemical composition and interfacial...

Cited by 8 publications

References 104 publications

Adjusting surface coverage of Pt nanocatalyst decoration for selectivity control in CMOS-integrated SnO₂ thin film gas sensors

Adjusting surface coverage of Pt nanocatalyst decoration for selectivity control in CMOS-integrated SnO₂ thin film gas sensors

Ferromagnetic–Antiferromagnetic Coupling in Gas‐Phase Synthesized M(Fe, Co, and Ni)–Cr Nanoparticles for Next‐Generation Magnetic Applications

A Concentrically Moveable Erosion Zone Magnetron for In Operando Tailoring of Alloy Nanoparticles in a Gas Aggregation Source

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Gas-phase synthesis of nanoparticles: current application challenges and instrumentation development responses

Abstract: Nanoparticles constitute fundamental building blocks required in several fields of application with current global importance. To fully exploit nanoparticle properties specifically determined by the size, shape, chemical composition and interfacial...

Cited by 8 publications

References 104 publications

Adjusting surface coverage of Pt nanocatalyst decoration for selectivity control in CMOS-integrated SnO2 thin film gas sensors

Adjusting surface coverage of Pt nanocatalyst decoration for selectivity control in CMOS-integrated SnO2 thin film gas sensors

Ferromagnetic–Antiferromagnetic Coupling in Gas‐Phase Synthesized M(Fe, Co, and Ni)–Cr Nanoparticles for Next‐Generation Magnetic Applications

A Concentrically Moveable Erosion Zone Magnetron for In Operando Tailoring of Alloy Nanoparticles in a Gas Aggregation Source

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Adjusting surface coverage of Pt nanocatalyst decoration for selectivity control in CMOS-integrated SnO₂ thin film gas sensors

Adjusting surface coverage of Pt nanocatalyst decoration for selectivity control in CMOS-integrated SnO₂ thin film gas sensors