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.
Fluorescent ratio (560/640 nm) vs. pH changes of the fabricated fiber-optic pH sensor. Measured pH range: pH 5.0 to pH 9.0. (a) fluorescence intensity change with time (seconds) in each buffer solution. (b) pH sensitive region of the sensor and linearity of fluorescent ratio changes as a function of buffer pHs.
