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Measuring absolute nanoparticle number concentrations from particle count time series

(2013) JOURNAL OF MICROSCOPY. 251(1). p.19-26
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Center for nano- and biophotonics (NB-Photonics)
Abstract
Single-particle microscopy is important for characterization of nanoparticulate matter for which accurate concentration measurements are crucial. We introduce a method for estimating absolute number concentrations in nanoparticle dispersions based on a fluctuating time series of particle counts, known as a Smoluchowski process. Thus, unambiguous tracking of particles is not required and identification of single particles is sufficient. However, the diffusion coefficient of the particles must be estimated separately. The proposed method does not require precalibration of the detection region volume, as this can be estimated directly from the observations. We evaluate the method in a simulation study and on experimental data from a series of dilutions of 0.2- and 0.5-m polymer nanospheres in water, obtaining very good agreement with reference values.
Keywords
Smoluchowski process, SIZE, FLUCTUATIONS, PHYSICS, DELIVERY, INTERFACE, Concentration measurements, single-particle methods, fluorescence microscopy

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Citation

Please use this url to cite or link to this publication:

MLA
Röding, Magnus, Hendrik Deschout, Kevin Braeckmans, et al. “Measuring Absolute Nanoparticle Number Concentrations from Particle Count Time Series.” JOURNAL OF MICROSCOPY 251.1 (2013): 19–26. Print.
APA
Röding, Magnus, Deschout, H., Braeckmans, K., & Rudemo, M. (2013). Measuring absolute nanoparticle number concentrations from particle count time series. JOURNAL OF MICROSCOPY, 251(1), 19–26.
Chicago author-date
Röding, Magnus, Hendrik Deschout, Kevin Braeckmans, and Mats Rudemo. 2013. “Measuring Absolute Nanoparticle Number Concentrations from Particle Count Time Series.” Journal of Microscopy 251 (1): 19–26.
Chicago author-date (all authors)
Röding, Magnus, Hendrik Deschout, Kevin Braeckmans, and Mats Rudemo. 2013. “Measuring Absolute Nanoparticle Number Concentrations from Particle Count Time Series.” Journal of Microscopy 251 (1): 19–26.
Vancouver
1.
Röding M, Deschout H, Braeckmans K, Rudemo M. Measuring absolute nanoparticle number concentrations from particle count time series. JOURNAL OF MICROSCOPY. 2013;251(1):19–26.
IEEE
[1]
M. Röding, H. Deschout, K. Braeckmans, and M. Rudemo, “Measuring absolute nanoparticle number concentrations from particle count time series,” JOURNAL OF MICROSCOPY, vol. 251, no. 1, pp. 19–26, 2013.
@article{4253367,
  abstract     = {Single-particle microscopy is important for characterization of nanoparticulate matter for which accurate concentration measurements are crucial. We introduce a method for estimating absolute number concentrations in nanoparticle dispersions based on a fluctuating time series of particle counts, known as a Smoluchowski process. Thus, unambiguous tracking of particles is not required and identification of single particles is sufficient. However, the diffusion coefficient of the particles must be estimated separately. The proposed method does not require precalibration of the detection region volume, as this can be estimated directly from the observations. We evaluate the method in a simulation study and on experimental data from a series of dilutions of 0.2- and 0.5-m polymer nanospheres in water, obtaining very good agreement with reference values.},
  author       = {Röding, Magnus and Deschout, Hendrik and Braeckmans, Kevin and Rudemo, Mats},
  issn         = {0022-2720},
  journal      = {JOURNAL OF MICROSCOPY},
  keywords     = {Smoluchowski process,SIZE,FLUCTUATIONS,PHYSICS,DELIVERY,INTERFACE,Concentration measurements,single-particle methods,fluorescence microscopy},
  language     = {eng},
  number       = {1},
  pages        = {19--26},
  title        = {Measuring absolute nanoparticle number concentrations from particle count time series},
  url          = {http://dx.doi.org/10.1111/jmi.12038},
  volume       = {251},
  year         = {2013},
}

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