Electrical equivalent circuit parameters for montmorillonite clay film-coated quartz crystal oscillators in contact with air, moisture and electrolyte solutions

Determination of solvation numbers of [RuII(bpy)3] and [RuII(tpy)2] functionalized-PAMAM dendrimers adsorbed onto platinum electrode surfaces

“…If these decreases in frequency were due not only to the changes in mass from the adsorption of the dendrimer, but also to changes in film properties, such as viscoelasticity [15,16], roughness [17][18][19][20], thickness [15, [21][22][23], and solvophilicity [17] of the film in contact with the quartz crystal resonator, it would be difficult to calculate unambiguously changes in mass from frequency changes using the Sauerbrey equation [24].…”

Electrochemical quartz crystal microbalance study of mass transport during electrochemical oxidation of [Os(bpy)3]2+ in clay-modified electrodes

“…2 shows that the conductance peaks before and after a potential step from 0 V (film containing only reduced [Os(bpy) 3 ] 2+ ) to 0.85 V (film containing oxidized [Os-(bpy) 3 ] 3+ ) were very similar. Similarly, there was no change in the conductance peak after the potential had been stepped back to 0 V. 9 Okajima et al [36][37][38] used impedance measurements to study swelling and structural changes in clay films, in air, in water, and in different electrolytes. They showed that Na + -clay films were rigid in air.…”

Improvement of piezoelectric crystal sensor for the detection of organic vapors using nanocrystalline TiO2 films

“…Herein, the attenuation behavior of the acoustic energy of PQC coated with TiO 2 films was investigated by the impedance analysis technique. Based on a model of an equivalent electrical circuit for PQC, the resistance (R) and other parameters of PQC can be determined using impedance measurements [19]. R is a key indicator for energy loss.…”