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Solidified Liquid Layer Model Expands the Application Fields of Quartz Crystal Microbalance
Author(s) -
Fu Long,
Chen Yanyan,
Ma Hongwei
Publication year - 2012
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.201100878
Subject(s) - quartz crystal microbalance , materials science , quartz , layer (electronics) , layer by layer , liquid crystal , chemical engineering , composite material , nanotechnology , chemistry , optoelectronics , engineering , adsorption
The application of a quartz crystal microbalance (QCM) in liquid is hindered by the complexity of data analysis. Recently, a “solidified liquid layer” (SLL) model has been proposed to simplify the data analysis. Here, missing evidence to support the SLL model is provided: 1) the SLL model is responsive to the density change of the liquid environment, 2) thickness values from the SLL model ( T SLL ) are in agreement with values measured by ellipsometry. The SLL model predicts that a 0.18 nm change of T SLL will lead to a 1 Hz signal, which is the resolution that most commercial QCMs could easily achieve. Using the SLL model, Au–S bond breakage has been successful. Biosensor applications are also being designed according to the SLL model. It is believed that with these results, the SLL model will bring QCM back to the radar screen of scientists.