In situ study of aggregate topology during growth of pyrolytic silica

Rai, Durgesh K.; Beaucage, Gregory; Vogtt, Karsten; Ilavsky, Jan; Kammler, Hendrik K.

doi:10.1016/j.jaerosci.2018.01.006

In situ study of aggregate topology during growth of pyrolytic silica

Journal Article · Wed Jan 17 04:00:00 EST 2018 · Journal of Aerosol Science

DOI:https://doi.org/10.1016/j.jaerosci.2018.01.006· OSTI ID:1429901

Rai, Durgesh K. ^[1]; Beaucage, Gregory ^[2]; Vogtt, Karsten ^[2]; Ilavsky, Jan ^[3]; Kammler, Hendrik K. ^[4]

Cornell Univ., Ithaca, NY (United States). Cornell High Energy Synchrotron Source (CHESS)
Univ. of Cincinnati, OH (United States). Materials Biomedical, Chemical, and Environmental Engineering
Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
Novartis Pharma AG, Postfach (Switzerland)

Ramified aggregates are formed in many kinetically-limited growth processes such as in sooting flames. The structures are disordered and present a challenge to quantification. The topology of such nanomaterials is important in understanding their formation and properties. Recently, a method has been developed for the quantification of branching in aggregates using small-angle scattering. The method allows for determination of the average number of branches, branch length, short circuit path through an aggregate, aggregate total mass, aggregate polydispersity, primary particle coordination number, Sauter mean diameter, primary particle polydispersity, particle size distribution, and surface to volume ratio. Here in this report the new topological method is applied to in situ measurements previously published from a flame aerosol as a function of height above the burner. The topological evolution of primary and fractal structures is observed. Lastly, this facilitates the understanding of growth dynamics and the structural rearrangements that occur during flame synthesis.

View Accepted Manuscript (DOE)

Research Organization:: Argonne National Laboratory (ANL), Argonne, IL (United States)

Sponsoring Organization:: USDOE Office of Science - Office of Basic Energy Sciences; U.S. Agency for International Development

Grant/Contract Number:: AC02-06CH11357

OSTI ID:: 1429901

Alternate ID(s):: OSTI ID: 1691886

Journal Information:: Journal of Aerosol Science, Journal Name: Journal of Aerosol Science Journal Issue: C Vol. 118; ISSN 0021-8502

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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