Tapered image charge detector for measuring velocity distributions of submicrometer particle scattering

Miller, Morgan E. C.; Mezher, Michelle; Continetti, Robert E.

doi:10.1063/1.5142207

Cited by 6 publications

(25 citation statements)

References 27 publications

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“…The rebound velocity of all three species was recorded for particles rebounding through the two different detectors, and angle-resolved measurements of particle rebound trajectories were recorded for 300/500 nm particles using the tapered ICD. The measurements made with these two types of detectors have previously been shown to be in good agreement . Particle flux to the impact target was insufficient (∼100s of events over a 40.5 mm 2 target area) to effectively find particles in postimpact analysis of the target, and no deformation sites were found using scanning electron microscopy (SEM) inspection of the target.…”

Section: Methodsmentioning

confidence: 89%

“…The measurements made with these two types of detectors have previously been shown to be in good agreement. 12 Particle flux to the impact target was insufficient (∼100s of events over a 40.5 mm 2 target area) to effectively find particles in postimpact analysis of the target, and no deformation sites were found using scanning electron microscopy (SEM) inspection of the target.…”

Section: Methodsmentioning

confidence: 99%

“…Accelerated particles were impacted onto a highly polished (<20 nm surface roughness) Mo target (II–VI infrared), a material of interest in the EUV photolithographic light source. The incident velocity of single particles was measured using two different ICDs located before the target: a tubular ICD (as in ref ) was used with 150 nm tin particles and a tapered ICD (as in ref ) was used with 300/500 nm tin particles to provide angle-resolved scattering data. The rebound velocity of all three species was recorded for particles rebounding through the two different detectors, and angle-resolved measurements of particle rebound trajectories were recorded for 300/500 nm particles using the tapered ICD.…”

Section: Methodsmentioning

confidence: 99%

“…Understanding the angular rebound behavior of the particles studied is also examined with the unique image charge detector (ICD) of the AIS. 12 This detector geometry coupled with the individual particle analysis of the instrument using charge detection mass spectrometry (CDMS) makes the AIS uniquely suited for characterizing individual particle behavior for species below the limits of optical detection. An empirical sizedependent scaling for the CoR and particle rebound fraction is also presented, normalizing the size dependence remarkably well in terms of the ratio of the incident kinetic energy and the particle impact contact area.…”

Section: Introductionmentioning

confidence: 99%

“…This size dependence is not expected in the bulk, but the scaling of the fit particle yield strength matches effects previously seen in nanoparticles of smaller sizes. Understanding the angular rebound behavior of the particles studied is also examined with the unique image charge detector (ICD) of the AIS . This detector geometry coupled with the individual particle analysis of the instrument using charge detection mass spectrometry (CDMS) makes the AIS uniquely suited for characterizing individual particle behavior for species below the limits of optical detection.…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Methodsmentioning

confidence: 89%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

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

Self Cite

View full text Add to dashboard Cite

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Effects of Molecular Size on Resolution in Charge Detection Mass Spectrometry

et al. 2022

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Instrumental resolution of Fourier transform-charge detection mass spectrometry instruments with electrostatic ion trap detection of individual ions depends on the precision with which ion energy is determined. Energy can be selected using ion optic filters or from harmonic amplitude ratios (HARs) that provide Fellgett's advantage and eliminate the necessity of ion transmission loss to improve resolution. Unlike the ion energyfiltering method, the resolution of the HAR method increases with charge (improved S/N) and thus with mass. An analysis of the HAR method with current instrumentation indicates that higher resolution can be obtained with the HAR method than the best resolution demonstrated for instruments with energy-selective optics for ions in the low MDa range and above. However, this gain is typically unrealized because the resolution obtainable with molecular systems in this mass range is limited by sample heterogeneity. This phenomenon is illustrated with both tobacco mosaic virus (0.6−2.7 MDa) and AAV9 (3.7−4.7 MDa) samples where mass spectral resolution is limited by the sample, including salt adducts, and not by instrument resolution. Nevertheless, the ratio of full to empty AAV9 capsids and the included genome mass can be accurately obtained in a few minutes from 1× PBS buffer solution and an elution buffer containing 300+ mM nonvolatile content despite extensive adduction and lower resolution. Empty and full capsids adduct similarly indicating that salts encrust the complexes during late stages of droplet evaporation and that mass shifts can be calibrated in order to obtain accurate analyte masses even from highly salty solutions.

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Production and Impact Characterization of Enceladus Ice Grain Analogues

Miller

Burke

Continetti

2022

ACS Earth Space Chem.

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Experiments examining the production of Enceladus ice grain analogues and the characterization of their impact phenomena are reported. These measurements make use of a unique single particle acceleratorthe aerosol impact spectrometer (AIS)to extend studies of the impact dynamics of ice grains down to the 0.1–10 μm diameter range relevant to orbital sampling of Enceladus ice grains. Laboratory generation of Enceladus plume grains followed by an examination of their impact dynamics is required to support the interpretation of ice grain orbital sampling in a potential flyby mission concept. In the work reported here, the AIS was used to inject charged water droplets produced in an electrospray ionization source through an aerodynamic lens and into vacuum such that they freeze within 50–200 μs. The ice grains were then accelerated to a controlled final velocity using a linear accelerator (LINAC). The capability of the LINAC to achieve hypervelocity speeds is explored here. The AIS was equipped with the tapered image charge detector, a multielement image charge detector composed of three charge-sensitive rings and the collision analysis target, providing angle-resolved measurements that revealed impact phenomena including rebound, sticking, and fragmentation for ice grain impacts on a molybdenum target. The velocity-dependent trends of these impact phenomena are reported for impacts ranging from 20 to 900 m/s.

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Tapered image charge detector for measuring velocity distributions of submicrometer particle scattering

Cited by 6 publications

References 27 publications

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

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

Effects of Molecular Size on Resolution in Charge Detection Mass Spectrometry

Production and Impact Characterization of Enceladus Ice Grain Analogues

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