The influence of the surface morphologies of Langmuir Blodgett (LB) thin films of porphyrins on their gas sensing properties

The interaction between the gas sensing and surface morphology properties of LB thin films of porphyrins in terms of the adsorption kinetics

“…This indicates that each thin film has different sensing kinetics parameters. A similar behavior has been observed in previous studies [11,18].…”

“…This result confirms that the thin films with higher surface area are exposed to a higher interaction with the gas molecules. This phenomenon has been emphasized in a previous publication [18].…”

Organic vapor sensing properties of copolymer Langmuir-Blodgett thin film sensors

“…These sensors can be investigated by using interferometry, ellipsometry, surface plasmon resonance (SPR), or quartz crystal microbalance techniques (3)(4)(5)(6). Among them, QCM has recently attracted a great deal of interest due to its potential applications such as LB thin film characterization (7) and gas sensor applications (8).…”

Influence of atomic force microscopy acquisition parameters on thin film roughness analysis

“…The gas sensing studies performed on these thin films have shown that the surface parameters, such as roughness, play an important role on the sensing mechanisms (Çayci et al,2011; Macagnano et al,2008). Reliable roughness parameters are needed to compare the gas sensing properties of different porphyrins or the effect of different fabrication procedures on surface roughness and sensing properties.…”

“…At the same time, a higher film roughness can be connected with an increased response speed (Roales et al,2011). We have previously shown for poprhyrin thin films (Çayci et al,2011) by using the surface area ratio (Sdr) to characterize the roughness of the thin films that an increased ratio between the actual surface and the geometric surface is equivalent to an increased gas absorption.…”