A multi-timescale model predicts the spherical-to-cubic morphology crossover of magnetron-sputtered niobium nanoparticles
Source abstract
Abstract
Magnetronové naprašování umožňuje syntézu nanočástic (NP) s řízenými charakteristikami bez použití roztoků a bez produkce odpadů. V článku popisujeme syntézu nanočástic Nb kulového (průměr 32 nm) a kubického (hrana 19 nm) tvaru v závislosti na tlaku, včetně jejich detailní strukturní charakterizace. Předchozí analytický model růstu a termalizace nanočástic byl modifikován, tak aby zahrnul bombardováni ionty a neideální ulpívání atomů na povrchu v plazmatickém prostředí. Model je dále podpořen multiškálovými simulacemi založenými na molekulární dynamice, které růst nanočástic detailně objasňují a vysvětlují rozdíly v jejich morfologii. ; Sputter-based cluster beam deposition offers a solvent- and effluent-free physical method to synthesize nanoparticles (NPs) with tailored characteristics. Here, depending on pressure, we synthesize Nb NPs of spherical (diameter 32 nm) and cubic (side length 19 nm) shape, and perform a detailed structural characterization. A known analytical model of the NP growth and thermalization was modified to account for ion bombardment and non-ideal atomic sticking in the plasma. The model was enforced with ad hoc multi-timescale molecular dynamic simulations to unveil the peculiarities of the growth of Nb NPs and explain the difference in their morphology.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: nanoparticles nucleation surface interactions · Ion-surface interactions and analysis · Dust and Plasma Wave Phenomena
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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