Sensing abilities of functionalized calix[4]arene coated QCM sensors towards volatile organic compounds in aqueous media

Highly stable, love-mode surface acoustic wave biosensor using Au nanoparticle-MoS2-rGO nano-cluster doped polyimide nanocomposite for the selective detection of carcinoembryonic antigen

“…Langmuir adsorption isotherm is stated as, The quantity of the constant values is taken from the available literature [32,33]. Additionally, the free energy of adsorption (∆G sorption ) was calculated as well at -6.3 ±0.81 kcal mol -1 , which is a comparable value with the previous analysis reported for a favourable adsorption process [34].…”

“…The results are given in Table 1 and the experimentally measured data is in good agreement with the theoretical values. The adsorption parameters to understand the CEA interaction with the anti-CEA at the bioreceptor interface can be evaluated through Langmuir and Freundlich isotherms, [32,33].…”

Highly selective and label-free Love-mode surface acoustic wave biosensor for carcinoembryonic antigen detection using a self-assembled monolayer bioreceptor

“…The measured data of the biosensor show good agreements with the theoretical values and the results are listed in table 2. The sorption equilibrium was studied to understand the favourability of antigen -antibody interaction using Langmuir and Freundlich sorption kinetics [27,28]. According to Langmuir sorption isotherm,…”

“…where Ce is the equilibrium concentration (mg/L) of CEA stock solutions, qe is the equilibrium sorption capacity (mg mg −1 );, the constant q0 indicates the real sorption capacity (mg mg−1) of the biosensor and b is related to the energy of sorption (L mmol −1 ). The constant values have been adopted from the previously published works [27,28] and the isotherm curves is plotted as Ce/qe v/s Ce, as shown in figure 9. The date points can be fit into a straight line which indicates that the sorption process during the immunoassay experiment in the present study follows Langmuir kinetics.…”

Sensory features of thiacalix[4]arene molecules towards volatile halogen-aromatic compounds

“…Calixarenes are capable to form Host-Guest complexes in the gas phase, in solutions, in the crystalline state and in two-dimensional phases -thin films [7]. Chemosensors based on calixarene thin films have been used to create devices capable of recognizing cations, anions and neutral organic molecules in solutions (artificial tongue) or in the air (artificial nose) [8][9][10][11][12][13].…”