TY - JOUR
T1 - Comment on 'Nanoscale water capillary bridges under deeply negative pressure' [Chem. Phys. Lett. 451 (2008) 88]
AU - Caupin, Frédéric
AU - Herbert, Eric
AU - Balibar, Sébastien
AU - Cole, Milton W.
N1 - Funding Information:
This research has been supported by National Science Foundation grant DMR-0505160, and ANR grants 05-BLAN-0084-01 and JC05-48942.
PY - 2008/9/22
Y1 - 2008/9/22
N2 - Yang et al. reported pull-off force measurements between an atomic force microscope tip and a silicon wafer. They deduced the pressure of liquid water inside the capillary bridge formed in humid air. They claimed that their 'research shows that nanoscale water capillary bridges are metastable and have absolutely negative pressure approaching the limit of stability for water' (around -200 MPa at room temperature). Indeed, pressures reaching -160 MPa were reported, establishing a world record. However, we show that the bridges are not metastable, that the analysis used suffers from internal inconsistency, and that several assumptions made are questionable.
AB - Yang et al. reported pull-off force measurements between an atomic force microscope tip and a silicon wafer. They deduced the pressure of liquid water inside the capillary bridge formed in humid air. They claimed that their 'research shows that nanoscale water capillary bridges are metastable and have absolutely negative pressure approaching the limit of stability for water' (around -200 MPa at room temperature). Indeed, pressures reaching -160 MPa were reported, establishing a world record. However, we show that the bridges are not metastable, that the analysis used suffers from internal inconsistency, and that several assumptions made are questionable.
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U2 - 10.1016/j.cplett.2008.08.047
DO - 10.1016/j.cplett.2008.08.047
M3 - Comment/debate
AN - SCOPUS:51349101526
SN - 0009-2614
VL - 463
SP - 283
EP - 285
JO - Chemical Physics Letters
JF - Chemical Physics Letters
IS - 1-3
ER -