The effect of boundary conditions on gas phase synthesised silver nanoparticles

Ulrika Backman, Jorma K. Jokiniemi, Ari Auvinen, Kari Lehtinen

Research output: Contribution to journalArticleScientificpeer-review

35 Citations (Scopus)

Abstract

We have prepared spherical non-agglomerated silver nanoparticles by an evaporation-condensation-dilution/cooling technique. Silver was evaporated from a crucible in a tubular flow reactor. A porous tube diluter was used to quench the carrier gas at the outlet of the reactor to enhance the formation of small particles and to suppress agglomeration and other particle growth mechanisms. The number size distribution of the prepared particles was measured with a DMA-CNC combination and the size and the shape of the particles were analysed with TEM. The system was modelled using a sectional aerosol dynamics computer code (ABC) to estimate the importance of different aerosol processes. In all conditions the particles obtained were non-agglomerated and spherical. The mean particle diameter varied from 4 to 10 nm depending on boundary conditions. From the modelling studies it can be concluded that the nucleation rate is the most important parameter controlling the final particle size.
Original languageEnglish
Pages (from-to)325-335
JournalJournal of Nanoparticle Research
Volume4
Issue number4
DOIs
Publication statusPublished - 2002
MoE publication typeA1 Journal article-refereed

Fingerprint

Silver Nanoparticles
Aerosols
Silver
Gases
silver
Boundary conditions
boundary conditions
vapor phases
Nanoparticles
nanoparticles
Crucibles
Dynamic mechanical analysis
Particles (particulate matter)
Dilution
Condensation
Evaporation
Nucleation
Agglomeration
Particle size
Aerosol

Keywords

  • silver
  • nanoparticles
  • aerosol synthesis
  • modelling

Cite this

Backman, Ulrika ; Jokiniemi, Jorma K. ; Auvinen, Ari ; Lehtinen, Kari. / The effect of boundary conditions on gas phase synthesised silver nanoparticles. In: Journal of Nanoparticle Research. 2002 ; Vol. 4, No. 4. pp. 325-335.
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The effect of boundary conditions on gas phase synthesised silver nanoparticles. / Backman, Ulrika; Jokiniemi, Jorma K.; Auvinen, Ari; Lehtinen, Kari.

In: Journal of Nanoparticle Research, Vol. 4, No. 4, 2002, p. 325-335.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

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AU - Jokiniemi, Jorma K.

AU - Auvinen, Ari

AU - Lehtinen, Kari

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Y1 - 2002

N2 - We have prepared spherical non-agglomerated silver nanoparticles by an evaporation-condensation-dilution/cooling technique. Silver was evaporated from a crucible in a tubular flow reactor. A porous tube diluter was used to quench the carrier gas at the outlet of the reactor to enhance the formation of small particles and to suppress agglomeration and other particle growth mechanisms. The number size distribution of the prepared particles was measured with a DMA-CNC combination and the size and the shape of the particles were analysed with TEM. The system was modelled using a sectional aerosol dynamics computer code (ABC) to estimate the importance of different aerosol processes. In all conditions the particles obtained were non-agglomerated and spherical. The mean particle diameter varied from 4 to 10 nm depending on boundary conditions. From the modelling studies it can be concluded that the nucleation rate is the most important parameter controlling the final particle size.

AB - We have prepared spherical non-agglomerated silver nanoparticles by an evaporation-condensation-dilution/cooling technique. Silver was evaporated from a crucible in a tubular flow reactor. A porous tube diluter was used to quench the carrier gas at the outlet of the reactor to enhance the formation of small particles and to suppress agglomeration and other particle growth mechanisms. The number size distribution of the prepared particles was measured with a DMA-CNC combination and the size and the shape of the particles were analysed with TEM. The system was modelled using a sectional aerosol dynamics computer code (ABC) to estimate the importance of different aerosol processes. In all conditions the particles obtained were non-agglomerated and spherical. The mean particle diameter varied from 4 to 10 nm depending on boundary conditions. From the modelling studies it can be concluded that the nucleation rate is the most important parameter controlling the final particle size.

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