TY - JOUR
T1 - Investigation of the viscoelastic properties of liquids trapped in nanoporous cavities using micromachined acoustic transducers
AU - Min, Hwall
AU - Allara, David
AU - Tadigadapa, Srinivas
N1 - Funding Information:
This work was supported in part by the National Science Foundation (Grant # # ECCS 0925438) and the US Army Research Office (Grant # W911NF-07-1-0327). The use of facilities at the PSU Site of the NSF NNIN under Agreement 0335765 is also acknowledged.
PY - 2011
Y1 - 2011
N2 - We have designed and fabricated 60 MHz bulk acoustic wave transducers and demonstrated the efficacy of these devices for probing the gravimetric and viscoelastic properties of layers in intimate contact with one of the electrodes. By integrating a 100 nm thick nanoporous film as the top electrode of the quartz resonator, we have been able to obtain enhanced sensitivity to mass loading and investigate the physical properties of liquids confined within 25-35 nm pores. By experimentally measuring the change in resonance frequency and Q-factor at the first and third resonance modes and using a detailed acoustic model in which the trapped liquid is treated as viscoelastic layer under a viscous liquid, the properties of trapped water-glycerol mixture confined in nanopores has been deduced.
AB - We have designed and fabricated 60 MHz bulk acoustic wave transducers and demonstrated the efficacy of these devices for probing the gravimetric and viscoelastic properties of layers in intimate contact with one of the electrodes. By integrating a 100 nm thick nanoporous film as the top electrode of the quartz resonator, we have been able to obtain enhanced sensitivity to mass loading and investigate the physical properties of liquids confined within 25-35 nm pores. By experimentally measuring the change in resonance frequency and Q-factor at the first and third resonance modes and using a detailed acoustic model in which the trapped liquid is treated as viscoelastic layer under a viscous liquid, the properties of trapped water-glycerol mixture confined in nanopores has been deduced.
UR - http://www.scopus.com/inward/record.url?scp=84857149091&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84857149091&partnerID=8YFLogxK
U2 - 10.1016/j.proeng.2011.12.157
DO - 10.1016/j.proeng.2011.12.157
M3 - Conference article
AN - SCOPUS:84857149091
SN - 1877-7058
VL - 25
SP - 631
EP - 634
JO - Procedia Engineering
JF - Procedia Engineering
T2 - 25th Eurosensors Conference
Y2 - 4 September 2011 through 7 September 2011
ER -