Effect of Solution Concentration on Breakup of Electro-Sprayed Droplets and Emission of Solute Ions

Maekawa, Tetsuya; Tokumi, Takuya; Higashi, Hidenori; Seto, Takafumi; Ōtani, Yoshio

doi:10.1252/kakoronbunshu.40.5

Cited by 2 publications

(3 citation statements)

References 15 publications

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“…The mixture of water/ methanol solution, and the addition of ammonium acetate have been widely employed in order to increase the electrical conductivity of precursor solution in electrospray process (Lenggoro et al, 2002). In addition, the correlations between PEG concentration and charging state were reported in our previous research (Maekawa et al, 2014).…”

Section: Collection Of Charged Nanoparticles By Image Forcementioning

confidence: 99%

Experimental Evidence of a Strong Image Force between Highly Charged Electrosprayed Molecular Ions and a Metal Screen

Omori¹,

Choi

Mukai

et al. 2016

Aerosol Air Qual. Res.

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We investigated the capturing mechanisms of highly charged macromolecular ions of polyethylene glycol electrosprayed onto a metal screen. Our experiments assessed how the charge state, size of the macromolecular ions, and filtration velocity affected the penetration of the ions through the metal screen. The single fiber efficiencies were plotted as functions of the Peclet number and image force parameter. Highly charged molecular ions had much higher collection efficiencies than neutralized macromolecules, suggesting the presence of a strong image force between the ions and metal surface. The single fiber efficiency by image force was proportional to the square root of an image force parameter predicted by theory. When using the prefactor of 9.7 proposed by Alonso et al. (2007), we found fair agreement between the experimental data and theoretical predictions on the collection efficiency of highly charged molecular ions with mobility diameters from 2.6 to 4.8 nm and numbers of electrical charges from 2 to 7. The experimental evidence from our study reveals that image force contributes strongly to the collection of multicharged macromolecular ions by a metal wire screen.

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Section: Collection Of Charged Nanoparticles By Image Forcementioning

confidence: 99%

Experimental Evidence of a Strong Image Force between Highly Charged Electrosprayed Molecular Ions and a Metal Screen

Omori¹,

Choi

Mukai

et al. 2016

Aerosol Air Qual. Res.

Self Cite

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show abstract

“…By utilizing both systems, it is possible to deduce the mass and charge of heavy biocomplexes and particles with many charges. 9 , 10 , 24 , 25 , 35 ) It is very difficult to distinguish heavy ions with many charges from a complicated one dimensional m / z mass spectrum. However the overlapped peaks in the spectrum can be separated in the two dimensional mass-mobility spectrum.…”

Section: Experimental Techniquesmentioning

confidence: 99%

“…To avoid the difficulties associated with multiple charges, charge reduction has been utilized, especially in IMS studies. 24 , 25 ) Charge reduction is performed by means of a “neutralizer” with radioactive materials such as 241 Am where small positive and negative ions produced by the radiation become attached to sample ions with multiple charges through the attractive Coulomb force between them. Finally the number of the charge of the sample ions is reduced to 0 or ±1 as described to be “neutralizer” literally.…”

Section: Experimental Techniquesmentioning

confidence: 99%

Mass and Charge Measurements on Heavy Ions

Sugai

2017

Mass Spectrometry

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The relationship between mass and charge has been a crucial topic in mass spectrometry (MS) because the mass itself is typically evaluated based on the m/z ratio. Despite the fact that this measurement is indirect, a precise mass can be obtained from the m/z value with a high m/z resolution up to 105 for samples in the low mass and low charge region under 10,000 Da and 20 e, respectively. However, the target of MS has recently been expanded to the very heavy region of Mega or Giga Da, which includes large particles and biocomplexes, with very large and widely distributed charge from kilo to Mega range. In this region, it is necessary to evaluate charge and mass simultaneously. Recent studies for simultaneous mass and charge observation and related phenomena are discussed in this review.

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Effect of Solution Concentration on Breakup of Electro-Sprayed Droplets and Emission of Solute Ions

Cited by 2 publications

References 15 publications

Experimental Evidence of a Strong Image Force between Highly Charged Electrosprayed Molecular Ions and a Metal Screen

Experimental Evidence of a Strong Image Force between Highly Charged Electrosprayed Molecular Ions and a Metal Screen

Mass and Charge Measurements on Heavy Ions

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