Capillary negative pressure measured by nanochannel collapse.
A new method is presented to measure capillarity-induced negative pressure. Negative pressures of several bars have been measured for five different liquids (ethanol, acetone, cyclohexane, aniline, and water) over a range of surface tension. Capillary negative pressure was measured in 79 +/- 3 nm silica nanochannels on the basis of the determination of the critical channel width for elastocapillary collapse of the flexible plate covering the channels. The results are consistent with the Young-Laplace equation.
Tas
Niels R
NR
Transducers Science and Technology Group, MESA+ Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands. n.r.tas@utwente.nl
Escalante
Maryana
M
van Honschoten
Joost W
JW
Jansen
Henri V
HV
Elwenspoek
M
M