In-situ monitoring of UF5 nanoparticle growth in a plug-flow reactor by a low-pressure differential mobility analyzer |
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| Authors: | M Hirasawa Y Kuga T Seto K Okuyama K Takeuchi |
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| Institution: | (1) RIKEN (The Institute of Physical and Chemical Research), 2-1 Hirosawa, Wako-shi, Saitama 350-0198, Japan, JP;(2) Department of Applied Chemistry, Muroran Institute of Technology, 27-1 Mizumoto-cho, Muroran 050-8585, Japan, JP;(3) Research Center for Advanced Manufacturing on Nanoscale Science and Engineering, National Institute of Advanced Industrial Science and Technology, 1-2-1 Namiki, Tsukuba-shi, Ibaraki 305-8564, Japan, JP;(4) Department of Chemical Engineering, Hiroshima University, Kagamiyama Higasi-Hiroshima-shi, Hiroshima 739-0046, Japan, JP |
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| Abstract: | The dependence of UF5 nanoparticle size distribution on growth time was investigated for various initial concentrations of UF5 monomers. UF5 nanoparticles prepared by photodissociation of UF6 in a mixed-flow reactor were allowed to pass through a plug-flow reactor (PFR), and their size distribution was measured
by an in-situ size-monitoring system, namely a low-pressure differential mobility analyzer. By changing the length of the
PFR, the growth time in the PFR was controlled from 0 to 30 s. An analysis using Lee’s coagulation model revealed that the
growth mechanism of the UF5 nanoparticles involved a Brownian coagulation process and that the sticking probability of the nanoparticles was approximately
unity.
Received: 27 August 2001 / Accepted: 6 September 2001 / Published online: 20 December 2001 |
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| Keywords: | PACS: 82 50 Fv |
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