---
_id: '26136'
abstract:
- lang: eng
text: To improve the understanding of the poor dispersability of fumed silica nanoparticle
agglomerates, the stability of highly defined agglomerated model particles was
investigated. The high temperature synthesis conditions for fumed silica were
simulated by tempering. Along with electron-microscopical analysis of the sintering
necks, the interparticle forces were investigated by energy resolved fragmentation
analysis based on low pressure impaction. At temperatures above 1,000 °C the fragmentability
of the agglomerates rapidly decreased while the energy necessary for fragmentation
increased. The development of sintering necks was observed for temperatures exceeding
1,300 °C. Comparison of the experimental data with the fragmentation behaviour
of a commercially produced fumed silica indicated solid state contacts (sintering
necks) as being most numerous in the agglomerates resulting in limited fragmentability.
author:
- first_name: M.
full_name: Seipenbusch, M.
last_name: Seipenbusch
- first_name: S.
full_name: Rothenbacher, S.
last_name: Rothenbacher
- first_name: M.
full_name: Kirchhoff, M.
last_name: Kirchhoff
- first_name: Hans-Joachim
full_name: Schmid, Hans-Joachim
id: '464'
last_name: Schmid
- first_name: G.
full_name: Kasper, G.
last_name: Kasper
- first_name: A. P.
full_name: Weber, A. P.
last_name: Weber
citation:
ama: Seipenbusch M, Rothenbacher S, Kirchhoff M, Schmid H-J, Kasper G, Weber AP.
Interparticle forces in silica nanoparticle agglomerates. Journal of Nanoparticle
Research. 2010;12(6):2037-2044. doi:10.1007/s11051-009-9760-5
apa: Seipenbusch, M., Rothenbacher, S., Kirchhoff, M., Schmid, H.-J., Kasper, G.,
& Weber, A. P. (2010). Interparticle forces in silica nanoparticle agglomerates.
Journal of Nanoparticle Research, 12(6), 2037–2044. https://doi.org/10.1007/s11051-009-9760-5
bibtex: '@article{Seipenbusch_Rothenbacher_Kirchhoff_Schmid_Kasper_Weber_2010, title={Interparticle
forces in silica nanoparticle agglomerates}, volume={12}, DOI={10.1007/s11051-009-9760-5},
number={6}, journal={Journal of Nanoparticle Research}, author={Seipenbusch, M.
and Rothenbacher, S. and Kirchhoff, M. and Schmid, Hans-Joachim and Kasper, G.
and Weber, A. P.}, year={2010}, pages={2037–2044} }'
chicago: 'Seipenbusch, M., S. Rothenbacher, M. Kirchhoff, Hans-Joachim Schmid, G.
Kasper, and A. P. Weber. “Interparticle Forces in Silica Nanoparticle Agglomerates.”
Journal of Nanoparticle Research 12, no. 6 (2010): 2037–44. https://doi.org/10.1007/s11051-009-9760-5.'
ieee: 'M. Seipenbusch, S. Rothenbacher, M. Kirchhoff, H.-J. Schmid, G. Kasper, and
A. P. Weber, “Interparticle forces in silica nanoparticle agglomerates,” Journal
of Nanoparticle Research, vol. 12, no. 6, pp. 2037–2044, 2010, doi: 10.1007/s11051-009-9760-5.'
mla: Seipenbusch, M., et al. “Interparticle Forces in Silica Nanoparticle Agglomerates.”
Journal of Nanoparticle Research, vol. 12, no. 6, 2010, pp. 2037–44, doi:10.1007/s11051-009-9760-5.
short: M. Seipenbusch, S. Rothenbacher, M. Kirchhoff, H.-J. Schmid, G. Kasper, A.P.
Weber, Journal of Nanoparticle Research 12 (2010) 2037–2044.
date_created: 2021-10-13T14:54:26Z
date_updated: 2022-01-06T06:57:16Z
doi: 10.1007/s11051-009-9760-5
intvolume: ' 12'
issue: '6'
language:
- iso: eng
page: 2037-2044
publication: Journal of Nanoparticle Research
publication_identifier:
issn:
- 1388-0764
- 1572-896X
publication_status: published
status: public
title: Interparticle forces in silica nanoparticle agglomerates
type: journal_article
user_id: '70093'
volume: 12
year: '2010'
...
---
_id: '26152'
abstract:
- lang: eng
text: A model for simulation of the three-dimensional morphology of nano-structured
aggregates formed by concurrent coagulation and sintering is presented. Diffusion
controlled cluster–cluster aggregation is assumed to be the prevailing coagulation
mechanism which is implemented using a Monte–Carlo algorithm. Sintering is modeled
as a successive overlapping of spherical primary particles, which are allowed
to grow as to preserve overall mass. Simulations are characterized by individual
ratios τ of characteristic collision to fusion time. A number of resulting aggregate-structures
is displayed and reveals structure formation by coagulation and sintering for
different values of τ. These aggregates are described qualitatively and quantitatively
by their mass fractal dimension Df and radius of gyration. The fractal dimension
increases from 1.86 for pure aggregation to ≈ 2.75 for equal characteristic time
scales. As sintering turns out to be more and more relevant, increasingly compact
aggregates start to form and the radius of gyration decreases significantly. The
simulation results clearly reveal a strong dependence of the fractal dimension
on the kinetics of the concurrent coagulation and sintering processes. Considering
appropriate values of Df in aerosol process simulations may therefore be important
in many cases.
author:
- first_name: Hans-Joachim
full_name: Schmid, Hans-Joachim
id: '464'
last_name: Schmid
- first_name: Saurabh
full_name: Tejwani, Saurabh
last_name: Tejwani
- first_name: Christian
full_name: Artelt, Christian
last_name: Artelt
- first_name: Wolfgang
full_name: Peukert, Wolfgang
last_name: Peukert
citation:
ama: Schmid H-J, Tejwani S, Artelt C, Peukert W. Monte Carlo simulation of aggregate
morphology for simultaneous coagulation and sintering. Journal of Nanoparticle
Research. 2004;6(6):613-626. doi:10.1007/s11051-004-2161-x
apa: Schmid, H.-J., Tejwani, S., Artelt, C., & Peukert, W. (2004). Monte Carlo
simulation of aggregate morphology for simultaneous coagulation and sintering.
Journal of Nanoparticle Research, 6(6), 613–626. https://doi.org/10.1007/s11051-004-2161-x
bibtex: '@article{Schmid_Tejwani_Artelt_Peukert_2004, title={Monte Carlo simulation
of aggregate morphology for simultaneous coagulation and sintering}, volume={6},
DOI={10.1007/s11051-004-2161-x},
number={6}, journal={Journal of Nanoparticle Research}, author={Schmid, Hans-Joachim
and Tejwani, Saurabh and Artelt, Christian and Peukert, Wolfgang}, year={2004},
pages={613–626} }'
chicago: 'Schmid, Hans-Joachim, Saurabh Tejwani, Christian Artelt, and Wolfgang
Peukert. “Monte Carlo Simulation of Aggregate Morphology for Simultaneous Coagulation
and Sintering.” Journal of Nanoparticle Research 6, no. 6 (2004): 613–26.
https://doi.org/10.1007/s11051-004-2161-x.'
ieee: 'H.-J. Schmid, S. Tejwani, C. Artelt, and W. Peukert, “Monte Carlo simulation
of aggregate morphology for simultaneous coagulation and sintering,” Journal
of Nanoparticle Research, vol. 6, no. 6, pp. 613–626, 2004, doi: 10.1007/s11051-004-2161-x.'
mla: Schmid, Hans-Joachim, et al. “Monte Carlo Simulation of Aggregate Morphology
for Simultaneous Coagulation and Sintering.” Journal of Nanoparticle Research,
vol. 6, no. 6, 2004, pp. 613–26, doi:10.1007/s11051-004-2161-x.
short: H.-J. Schmid, S. Tejwani, C. Artelt, W. Peukert, Journal of Nanoparticle
Research 6 (2004) 613–626.
date_created: 2021-10-13T16:05:11Z
date_updated: 2022-01-06T06:57:17Z
doi: 10.1007/s11051-004-2161-x
intvolume: ' 6'
issue: '6'
language:
- iso: eng
page: 613-626
publication: Journal of Nanoparticle Research
publication_identifier:
issn:
- 1388-0764
- 1572-896X
publication_status: published
status: public
title: Monte Carlo simulation of aggregate morphology for simultaneous coagulation
and sintering
type: journal_article
user_id: '70093'
volume: 6
year: '2004'
...