Surface Pretreatment Boosts the Performance of Supramolecular Affinity Materials on Quartz Crystal Microbalances for Sensor Applications

2013 ◽  
Vol 85 (21) ◽  
pp. 10526-10530 ◽  
Author(s):  
Malte Brutschy ◽  
Daniel Lubczyk ◽  
Klaus Müllen ◽  
Siegfried R. Waldvogel
Keyword(s):  
Quartz Crystal ◽  
Surface Pretreatment ◽  
Sensor Applications ◽  
Quartz Crystal Microbalances

scholarly journals Using Quartz Crystal Microbalance for Field Measurement of Liquid Viscosities

2016 ◽  
Vol 2016 ◽  
pp. 1-8 ◽  
Author(s):  
Qingsong Bai ◽  
Xianhe Huang
Keyword(s):  
Field Measurement ◽  
Quartz Crystal ◽  
Newtonian Liquid ◽  
Viscous Damping ◽  
Frequency Shifts ◽  
Viscous Liquids ◽  
Sensor Applications ◽  
Potential Applications ◽  
Quartz Crystal Microbalances ◽  
Large Frequency

The field measurement of liquid viscosities, especially the high viscous liquids, is challenging and often requires expensive equipment, long processing time, and lots of reagent. We use quartz crystal microbalances (QCMs) operating in solution which are also sensitive to the viscosity and density of the contacting solution. QCMs are typically investigated for sensor applications in which one surface of QCM completely immersed in Newtonian liquid, but the viscous damping in liquids would cause not only large frequency shifts but also large losses in the quality factorQleading to instability and even cessation of oscillation. A novel mass-sensitivity-based method for field measurement of liquid viscosities using a QCM is demonstrated in this paper and a model describing the influence of the liquid properties on the oscillation frequency is established as well. Two groups of verified experiments were performed and the experimental results show that the presented method is effective and possesses potential applications.

Quartz Crystal Microbalances Functionalized with Citric Acid-Doped Polyvinyl Acetate Nanofibers for Ammonia Sensing

2020 ◽  
Vol 3 (6) ◽  
pp. 5687-5697 ◽  
Author(s):  
Roto Roto ◽  
Aditya Rianjanu ◽  
Annisa Rahmawati ◽  
Innas Amaliya Fatyadi ◽  
Nursidik Yulianto ◽  
...  
Keyword(s):  
Citric Acid ◽  
Quartz Crystal ◽  
Polyvinyl Acetate ◽  
Ammonia Sensing ◽  
Quartz Crystal Microbalances

Design of 3D printed holder for quartz crystal microbalances

2021 ◽  
Author(s):  
Diego Scaccabarozzi ◽  
Bortolino Saggin ◽  
Marianna Magni ◽  
Pietro Valnegri ◽  
Marco Giovanni Corti ◽  
...  
Keyword(s):  
Quartz Crystal ◽  
Quartz Crystal Microbalances ◽  
3D Printed

Functionalized Polymers as Receptors for Detection of Cells

2011 ◽  
Vol 64 (9) ◽  
pp. 1256 ◽  
Author(s):  
Miroslava Polreichova ◽  
Usman Latif ◽  
Franz L. Dickert
Keyword(s):  
Soft Lithography ◽  
Quartz Crystal ◽  
Coli Strain ◽  
Yeast Cells ◽  
Label Free ◽  
Sensitive Material ◽  
E Coli ◽  
Label Free Detection ◽  
Quartz Crystal Microbalances ◽  
Cell Strains

Mass sensitive sensors were applied for fast and label-free detection of bio-analytes. Robust and miniaturized sensor devices were fabricated by combining bio-mimetic imprinted surfaces with quartz crystal microbalances for the analysis of yeast and bacteria cells. These sensors allow us to differentiate between different growing stages of yeast cells. Moreover, the viability of cells was detected by structuring quartz crystal microbalance electrodes like a grid. Artificial yeast cells were produced to pattern the recognition layer, giving reversible enrichment of the respective bio-analytes. This approach was followed to ensure the reproducibility of the identical sensitive material in each case, because the properties of each cell depend on its growth stage, which varies over time. The strategy was further applied to develop a sensitive system for Escherichia coli. Structuring of these materials by soft lithography allows differentiation between cell strains, e.g. E. coli (strain W & B) with a five-fold selectivity.

Modelling of a Piezoelectric Polymer Film System for Biosensing Applications

2010 ◽  
Vol 636-637 ◽  
pp. 1206-1211
Author(s):  
Paulo Inácio ◽  
J.N. Marat-Mendes ◽  
Eugen R. Neagu ◽  
C.J. Dias
Keyword(s):  
Polymer Film ◽  
Quartz Crystal ◽  
Electronic Circuit ◽  
Flow Cell ◽  
Film System ◽  
The Finite Element Method ◽  
Polyvinylidene Difluoride ◽  
Piezoelectric Polymer ◽  
Quartz Crystal Microbalances ◽  
Acoustic Wave Devices

Most piezoelectric gravimetric biosensors are based on quartz crystal microbalances or surface acoustic wave devices. In this paper we describe a polymer film system, made of piezoelectric polyvinylidene difluoride (PVDF) and the Immobilon-P membrane (porous PVDF), for biosensing applications. In operation a film is accommodated in a flow cell and connected to an electronic circuit, constituting an oscillatory resonant device; the output signal is its resonance frequency. This device successfully detected the binding between bovine IgG and bovine anti-IgG. Work on the modelling of this film system is presented. Two different approaches are being considered: the finite element method (FEM) and the ABCD matrices. Results comparing theoretical and experimental data are presented.

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