. 2014 Mar 28;14(4):6165–6206. doi: 10.3390/s140406165
© 2014 by the authors; licensee MDPI, Basel, Switzerland.
This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/3.0/http://creativecommons.org/licenses/by/3.0/).
Figure 15.
Schematic of a THz quartz crystal tuning-fork.