title: Humidity adsorption kinetics of a trypsin gel film.
abstract: This study focuses on the humidity adsorption kinetics of an isopropanol-induced and pH-triggered bovine pancreatic trypsin gel (BPTG). The BPTG was adsorbed on a gold coated Quartz Crystal Microbalance (QCM) substrate with a thickness of 376 nm. The morphology of the film was characterized using Atomic Force Microscopy (AFM). QCM was used to investigate the humidity sensing properties of the BPTG film. The response of the humidity sensor was explained using the Langmuir model. The average values of adsorption and desorption rates between 11% RH (relative humidity) and 97% RH were calculated as 2482.5 M(-1) s(-1) and 0.02 s(-1), respectively. The equilibrium constant and average Gibbs Free Energy of humidity adsorption and desorption cycles were obtained as 133,000 and -11.8 kJ/mol, respectively.
authors: Department of Metallurgy Engineering, İzmir Katip Celebi University, İzmir, Turkey. salihokur2@gmail.com
authors: Salih
authors: S
authors: Okur
authors: Cagatay
authors: C
authors: Ceylan
authors: Evren
authors: E
authors: Culcular
mesh_terms: D000327:Adsorption; D000818:Animals; D002417:Cattle; D005782:Gels; D006046:Gold / Q000737:chemistry*; D006813:Humidity; D007700:Kinetics; D018625:Microscopy, Atomic Force; D010179:Pancreas / Q000378:metabolism; D011791:Quartz / Q000737:chemistry*; D058525:Quartz Crystal Microbalance Techniques; D013499:Surface Properties; D014357:Trypsin / Q000737:chemistry* / Q000378:metabolism
chemical_list: D005782:Gels; D011791:Quartz; D006046:Gold; D014357:Trypsin