Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
(a) Diagram of tuning fork sensor setup. Tuning fork is mechanically driven by a piezo actuator, and the tuning fork’s oscillation voltage signal is measured. (b) Photograph of tip-attached tuning fork sensor. The fork is glued to the iron plate. (c) Diagram of calibrating force sensitivity of a tuning fork sensor using Bruker AFM and a tipless cantilever (not to scale).
