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Negative Pressure in Water Capillary Bridges at Nanocontacts

Published

Author(s)

Seung H. Yang, Michael Nosonovsky, Huan Zhang, Koo-Hyun Chung

Abstract

Negative Laplace pressure may develop inside a water capillary bridge formed between two bodies and contribute to the force required to pull them apart. Because of the negative pressure, nanoscale water capillary bridges may not be stable. We show that pressure inside a nanoscale water capillary bridge may reach absolute negative value (corresponding to tensile stress). The negative pressure is within the spinodal limit for water suggesting that the water bridge may be in the metastable state. In addition, the size of a nanoscale water capillary bridge is smaller than the critical size for cavitation, indicating that cavitation bubbling is unlikely for nanocontacts..
Citation
Nano Letters

Keywords

adhesion, AFM, capillary bridge, negative pressure

Citation

Yang, S. , Nosonovsky, M. , Zhang, H. and Chung, K. (2017), Negative Pressure in Water Capillary Bridges at Nanocontacts, Nano Letters (Accessed April 12, 2024)
Created February 19, 2017