TY - JOUR
T1 - Heterogeneous Freezing of Carbon Nanotubes
T2 - A Model System for Pore Condensation and Freezing in the Atmosphere
AU - Alstadt, Valerie J.
AU - Dawson, Joseph Nelson
AU - Losey, Delanie J.
AU - Sihvonen, Sarah K.
AU - Freedman, Miriam Arak
N1 - Funding Information:
We are grateful for support from the CAREER program of NSF (CHE-1351383). We acknowledge the Materials Characterization Lab at Penn State, specifically, J. Shallenberger for the XPS data, J. Anderson and E. Bazilevskaya for the BET data, and J. Gray for TEM advice. We are also grateful to M. Terrones and L. P. Rajukumar for their assistance with plasma treatment.
Publisher Copyright:
© 2017 American Chemical Society.
PY - 2017/10/26
Y1 - 2017/10/26
N2 - Heterogeneous ice nucleation is an important mechanism for cloud formation in the upper troposphere. Recently, pores on atmospheric particles have been proposed to play a significant role in ice nucleation. To understand how ice nucleation occurs in idealized pores, we characterized the immersion freezing activity of various sizes of carbon nanotubes. Carbon nanotubes are used both as a model for pores and proxy for soot particles. We determined that carbon nanotubes with inner diameters between 2 and 3 nm exhibit the highest ice nucleation activity. Implications for the freezing behavior of porous materials and nucleation on soot particles will be discussed.
AB - Heterogeneous ice nucleation is an important mechanism for cloud formation in the upper troposphere. Recently, pores on atmospheric particles have been proposed to play a significant role in ice nucleation. To understand how ice nucleation occurs in idealized pores, we characterized the immersion freezing activity of various sizes of carbon nanotubes. Carbon nanotubes are used both as a model for pores and proxy for soot particles. We determined that carbon nanotubes with inner diameters between 2 and 3 nm exhibit the highest ice nucleation activity. Implications for the freezing behavior of porous materials and nucleation on soot particles will be discussed.
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U2 - 10.1021/acs.jpca.7b06359
DO - 10.1021/acs.jpca.7b06359
M3 - Article
C2 - 28953395
AN - SCOPUS:85032624597
VL - 121
SP - 8166
EP - 8175
JO - Journal of Physical Chemistry A
JF - Journal of Physical Chemistry A
SN - 1089-5639
IS - 42
ER -