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. Author manuscript; available in PMC: 2010 Apr 24.
Published in final edited form as: Sens Actuators B Chem. 2009 Apr 24;138(1):1–4. doi: 10.1016/j.snb.2009.01.035

Fig. 2.

Fig. 2

(a) Phase angle versus frequency resonance spectra at various RHs with E = −6 kV/cm and E = 0, and (b) relative resonance frequency shift Δf(E)/f(E) versus relative humidity at various E. The lines are only to guide the eye.