Surface acoustic wave interaction with humidity-sensitive TPPS4 nano-strip structure

R. Rimeika; R. Rotomskis; V. Poderys; D. Čiplys; A. Sereika; A. Selskis; M.S. Shur

Surface acoustic wave interaction with humidity-sensitive TPPS4 nano-strip structure

Authors

R. Rimeika
R. Rotomskis
V. Poderys
D. Čiplys
A. Sereika
A. Selskis
M.S. Shur

Keywords:

surface acoustic wave, porphyne nano-strip structure, humidity sensor

Abstract

The surface acoustic wave propagation in the structure consisting of Meso-tetra (4-sulfonatophenyl) porphine (TPPS₄) film deposited on a piezoelectric lithium niobate substrate has been studied. The SAW velocity decrease and the attenuation increase with growing ambient humidity. This effect is attributed to the changes in the film viscoelasticity due to the water adsorption. Much weaker response is observed when the water vapour is replaced by the acetone vapour. The possibility of using TPPS₄ - LiNbO₃ structure as a SAW humidity sensor has been demonstrated.

Downloads

Published

2006-03-17

Issue

Vol. 58 No. 1 (2006)

Section

ULTRASONIC AND ACOUSTIC MEASUREMENTS

License

Copyright terms are indicated in the Republic of Lithuania Law on Copyright and Related Rights; Articles 4-37.
In the event the above Work is not accepted and is not published in the Publication or is withdrawn by Authors(s) before acceptance by the Publication; this guarantee form becomes null and void; and the submitted Work is not returned to the Author(s).