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Title: Mapping ice formation to mineral-surface topography using a micro mixing chamber with video and atomic-force microscopy

Abstract

We developed a method for examining ice formation on solid materials under cloud-like conditions. Our experimental approach couples video-rate optical microscopy of ice formation with high-resolution atomic force microscopy (AFM) of the initial mineral surface. We demonstrate how colocating stitched AFM images with video microscopy can be used to relate the likelihood of ice formation to nanoscale properties of a mineral substrate, e.g., the abundance of surface steps of a certain height. We also discuss the potential of this setup for future iterative investigations of the properties of ice nucleation sites on materials.

Authors:
 [1];  [1]
  1. Sandia National Lab. (SNL-CA), Livermore, CA (United States)
Publication Date:
Research Org.:
Sandia National Lab. (SNL-CA), Livermore, CA (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1570286
Report Number(s):
SAND-2019-10510J
Journal ID: ISSN 1867-8610; 679125
Grant/Contract Number:  
AC04-94AL85000
Resource Type:
Accepted Manuscript
Journal Name:
Atmospheric Measurement Techniques Discussions (Online)
Additional Journal Information:
Journal Name: Atmospheric Measurement Techniques Discussions (Online); Journal Volume: in review; Journal ID: ISSN 1867-8610
Publisher:
European Geosciences Union
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES

Citation Formats

Friddle, Raymond William, and Thürmer, Konrad. Mapping ice formation to mineral-surface topography using a micro mixing chamber with video and atomic-force microscopy. United States: N. p., 2019. Web. doi:10.5194/amt-2019-291.
Friddle, Raymond William, & Thürmer, Konrad. Mapping ice formation to mineral-surface topography using a micro mixing chamber with video and atomic-force microscopy. United States. https://doi.org/10.5194/amt-2019-291
Friddle, Raymond William, and Thürmer, Konrad. Tue . "Mapping ice formation to mineral-surface topography using a micro mixing chamber with video and atomic-force microscopy". United States. https://doi.org/10.5194/amt-2019-291. https://www.osti.gov/servlets/purl/1570286.
@article{osti_1570286,
title = {Mapping ice formation to mineral-surface topography using a micro mixing chamber with video and atomic-force microscopy},
author = {Friddle, Raymond William and Thürmer, Konrad},
abstractNote = {We developed a method for examining ice formation on solid materials under cloud-like conditions. Our experimental approach couples video-rate optical microscopy of ice formation with high-resolution atomic force microscopy (AFM) of the initial mineral surface. We demonstrate how colocating stitched AFM images with video microscopy can be used to relate the likelihood of ice formation to nanoscale properties of a mineral substrate, e.g., the abundance of surface steps of a certain height. We also discuss the potential of this setup for future iterative investigations of the properties of ice nucleation sites on materials.},
doi = {10.5194/amt-2019-291},
journal = {Atmospheric Measurement Techniques Discussions (Online)},
number = ,
volume = in review,
place = {United States},
year = {Tue Sep 24 00:00:00 EDT 2019},
month = {Tue Sep 24 00:00:00 EDT 2019}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record

Figures / Tables:

Figure 1 Figure 1: Experimental Setup. (a) The 3-port fluid cell. The port design separates the humid and cold gases before injection into the cell, which are then mixed to form a cold humid atmosphere just before entry to the sample volume. (b) The overall setup is built around an existing AFMmore » (8) with top-down optics (2). Dry nitrogen is divided into cold and humid streams. The cold stream is nitrogen gas cooled in a liquid nitrogen-filled dewar (3), mixed at (4) with a dosage of room temperature nitrogen gas varied by (5). The total flow rate of the cold stream is unchanged, only the proportions of cold and warm flows are adjusted. The humid stream is generated by flowing nitrogen through a bubbler filled with water (6). The humid gas leaving the bubbler is directed by a 3-way valve towards either a humidity sensor (7), or to the sample cell. The cold and humid streams of nitrogen gas enter an acrylic bell jar which houses the AFM scanner with a cellophane bellows bridging the optical objective (2) to the top rim of the jar. The humid stream enters one port of the sample cell while the cold stream is divided to cool the underside of the sample, by way of a copper stand-off stage (9), and flow a smaller proportion into the other port of the sample cell. The temperature of the underside of the sample stage and the gas exiting the cell are measured with thermistors. The decimal values next to flow line segments are flow rates for those segments in L/min.« less

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Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.