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Nucleation and Growth of Magnetron-Sputtered Ag Nanoparticles as Witnessed by Time-Resolved Small Angle X-Ray Scattering
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- Shelemin, A. (författare)
- Department of Macromolecular Physics, Faculty of Mathematics and Physics, Charles University, V Holesovickach 2, 18000 Prague, Czech Republic
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- Pleskunov, P. (författare)
- Department of Macromolecular Physics, Faculty of Mathematics and Physics, Charles University, V Holesovickach 2, 18000 Prague, Czech Republic
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- Kousal, J. (författare)
- Department of Macromolecular Physics, Faculty of Mathematics and Physics, Charles University, V Holesovickach 2, 18000 Prague, Czech Republic
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- (creator_code:org_t)
- 2019-12-18
- 2019
- Engelska.
- Ingår i: Particle and Particle Systems Characterization. - : John Wiley & Sons. - 0934-0866 .- 1521-4117.
- Tidskriftsartikel (refereegranskat)
Abstract
Ämnesord
Stäng
- Kinetic aspects of the synthesis of Ag nanoparticles (NPs) by magnetron sputtering are studied by in situ and time‐resolved small angle X‐ray scattering (SAXS). Part of the NPs are found to become confined within a capture zone at 1–10 mm from the surface of the target and circumscribed by the plasma ring. Three regimes of the NP growth are identified: 1) early growth at which the average NP diameter rapidly increases to 90 nm; 2) cycling instabilities at which the SAXS signal periodically fluctuates either due to expelling of large NPs from the capture zone or due to the axial rotation of the NP cloud; and 3) steady‐state synthesis at which stable synthesis of the NPs is achieved. The NP confinement within the capture zone is driven by the balance of forces, the electrostatic force being dominant. On reaching the critical size, large NPs acquire an excessive charge and become expelled from the capture zone via the electrostatic interactions. As a result, significant NP deposits are formed on the inner walls of the aggregation chamber as well as in the central area of the target.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Industriell bioteknik -- Biomaterial (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Industrial Biotechnology -- Bio Materials (hsv//eng)
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- Shelemin, A.
- Pleskunov, P.
- Kousal, J.
- Drewes, J.
- Hanuš, J.
- Ali-Ogly, S.
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- Nikitin, D.
- Solař, P.
- Kratochvíl, J.
- Vaidulych, M.
- Schwartzkopf, M.
- Kylián, O.
- Polonskyi, O.
- Strunskus, T.
- Faupel, F.
- Roth, Stephan V.
- Biederman, H.
- Choukourov, A.
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