Viscoelastic properties of thin films studied with quartz crystal resonators

1997 ◽  
Vol 107 ◽  
pp. 91-104 ◽  
Author(s):  
Oliver Wolff ◽  
Eberhard Seydel ◽  
Diethelm Johannsmann
Keyword(s):  
Thin Films ◽  
Viscoelastic Properties ◽  
Quartz Crystal ◽  
Quartz Crystal Resonators

Viscoelastic properties of thin films probed with a quartz-crystal resonator

1992 ◽  
Vol 46 (12) ◽  
pp. 7808-7815 ◽  
Author(s):  
D. Johannsmann ◽  
K. Mathauer ◽  
G. Wegner ◽  
W. Knoll
Keyword(s):  
Thin Films ◽  
Viscoelastic Properties ◽  
Quartz Crystal ◽  
Quartz Crystal Resonator ◽  
Crystal Resonator

scholarly journals Molecularly Imprinted Chitosan-Based Thin Films with Selectivity for Nicotine Derivatives for Application as a Bio-Sensor and Filter

Polymers ◽  
2021 ◽  
Vol 13 (19) ◽  
pp. 3363
Author(s):  
Obinna Ofoegbu ◽  
David Chukwuebuka Ike ◽  
Gaber El-Saber Batiha ◽  
Hassan Fouad ◽  
Roongnapa S. Srichana ◽  
...  
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Quartz Crystal ◽  
Time Interval ◽  
Film Sensor ◽  
Balance System ◽  
Chitosan Matrix ◽  
Nicotine Derivatives ◽  
Quartz Crystal Resonators ◽  
Single Matrix

This study reports the feasible use of chitosan as a thin film biosensor on the very sensitive quartz crystal micro balance system for detection of blends of multiple templates within a single matrix. The development of chitosan-based thin film materials with selectivity for nicotine derivatives is described. The molecular imprinting of a combination of nicotine derivatives in N-diacryloyl pipiradine-chitosan-methacrylic acid copolymer films on quartz crystal resonators was used to generate thin films with selectivity for nicotine and a range of nicotine analogues, particularly 3-phenylpyridine. The polymers were characterized by spectroscopic and microscopic evaluations; surface area, pore size, pore volume using Breuner-Emmet-Teller method. Temperature characteristics were also studied. The swelling and structure consistency of the Chitosan was achieved by grafting with methylmethacrylic acid and cross-linking with N-diacrylol pipiradine. A blend of 0.002 g (0.04 mmol) of Chitosan, 8.5 μL Methylmethacrylic Acid and 1.0 mg N-diacrylol pipradine (BAP) presented the best blend formulation. Detections were made within a time interval of 99 sec, and blend templates were detected at a concentration of 0.5 mM from the Quartz crystal microbalance resonator analysis. The successful crosslinking of the biopolymers ensured successful control of the swelling and agglomeration of the chitosan, giving it the utility potential for use as thin film sensor. This successful crosslinking also created successful dual multiple templating on the chitosan matrix, even for aerosolized templates. The products can be used in environments with temperature ranges between 60 °C and 250 °C.

Sign in / Sign up

Export Citation Format

Share Document