Introduction of a New Technique to Measure the Coefficient of Restitution for Nanoparticles

Schöner, Christian; Rennecke, S.; Weber, Alfred P.; Pöschel, Thorsten

doi:10.1002/cite.201300132

Cited by 12 publications

(3 citation statements)

References 33 publications

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“…We investigate the collision of a nanoparticle with a solid adhesive wall by means of molecular dynamics. It was shown that MD simulations of low-pressure impaction deliver reliable results for the coefficient of restitution [20], well in agreement with experiments. The initial state is sketched in Fig.…”

Section: A Interaction Models and System Geometrysupporting

confidence: 65%

Orientation-dependent properties of nanoparticle impact

Schöner

Pöschel

2018

Phys. Rev. E

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The mechanical properties of nanoparticles cannot be reliably described by bulk material characteristics due to their atomic structure, leading to pronounced anisotropic behavior. By means of molecular dynamics simulations, we study the impact of 5-nm Ag particles on an adhesive rigid wall. We show that the main characteristics of the impact such as the coefficient of normal restitution, the sticking probability, the maximal contact force, and the degree of plastic deformation of the particle depend sensitively on the angular orientation of the nanoparticle prior to the impact. We introduce the scalar parameter Ω describing the orientation and show that the impact characteristics can be described as functions of Ω.

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Section: A Interaction Models and System Geometrysupporting

confidence: 65%

Orientation-dependent properties of nanoparticle impact

Schöner

Pöschel

2018

Phys. Rev. E

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“…These results show that the AIS will have great utility for measuring the reflection of nanoparticles from surfaces, yielding quantitative information on the coefficient of restitution that describes the inelasticity of such collisions [29,30].…”

Section: Introductionmentioning

confidence: 85%

The aerosol impact spectrometer: a versatile platform for studying the velocity dependence of nanoparticle-surface impact phenomena

2017

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A new apparatus designed to accelerate/decelerate and study the surface impact phenomena of charged aerosols and nanoparticles over a wide range of mass-tocharge (m/z) ratios and final velocities is described. A nanoparticle ion source coupled with a linear electrostatic trap configured as an image charge detection (ICD) mass spectrometer allows determination of the mass-to-charge ratio and the absolute charge and mass of single nanoparticles. A nine-stage linear accelerator/ decelerator is used to fix the final velocity of the nanoparticles, and in the results reported here the coefficient of restitution for polystyrene latex spheres (PSLs) impacting on silicon is measured using ICD techniques. To enable this apparatus to study a wide range of m/z, the data acquisition system uses a transient digitizer interfaced to a field-programmable gate array module that allows real time calculation of m/z and determination of the pulse sequence for the linear accelerator/decelerator. Electrospray ionization of a colloidal suspension of PSL spheres of 510 and 990 nm has been used to demonstrate acceleration and deceleration of charged nanoparticles and the resolution of the apparatus. Measurements of the coefficient of restitution for PSLs on silicon over the range 10-400 m/s are consistent with previous studies.

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“…Modeling of this parameter for different particle materials enables understanding of key properties that affect a collision. Indirect observations of impact behavior at the nanoscale have also been reported using extrapolations and modeling to determine particle velocities that are otherwise challenging to detect. − Previous work and modeling at the nanoscale is particularly focused on understanding the effects of nanoscale properties on collisions commonly described with continuum mechanics for larger particles. Therefore, most of these previous studies have been confined to collisions of particles <100 nm in diameter where deviations from bulk material properties have been noted. , Examination of particles in the 100–1000 nm diameter range provides information about the transition from a bulk description of particle properties down to the nanoscale.…”

Section: Introductionmentioning

confidence: 99%

Size-Dependent Phenomena in Angle-Resolved Measurements of Submicron Sn Particle Scattering from a Molybdenum Surface

Miller

Mezher

Dea³

et al. 2021

J. Phys. Chem. C

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Nanoparticle scattering dynamics play a critical role in a wide range of astrophysical, industrial, and ambient environments; however, experimental data to guide theoretical models that predict this behavior are lacking. The experiments reported here examine these phenomena using single massselected, charged, submicron solid tin particles covered with an oxide layer of ∼10 nm thickness that are accelerated with varying energies onto a highly polished molybdenum surface. The scattering angle and speed for each backscattering event were measured and analyzed, revealing notable size-dependent trends in the coefficient of restitution and onset of sticking and charge transfer over the range from 150 to 500 nm diameter. The experimental results are interpreted using a mechanical model of the measured impact behavior, extending particle scattering measurements into a new intermediate size range, important for understanding the transport of submicron tin particles. An empirical scaling rule is also presented that normalizes the size-dependent behavior in terms of the ratio of the incident kinetic energy and impact contact area.

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Introduction of a New Technique to Measure the Coefficient of Restitution for Nanoparticles

Cited by 12 publications

References 33 publications

Orientation-dependent properties of nanoparticle impact

Orientation-dependent properties of nanoparticle impact

The aerosol impact spectrometer: a versatile platform for studying the velocity dependence of nanoparticle-surface impact phenomena

Size-Dependent Phenomena in Angle-Resolved Measurements of Submicron Sn Particle Scattering from a Molybdenum Surface

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