Comparison Of Mass-sensitive Devices For Gas Sensing: Bulk Acoustic Wave (baw)- And Surface Acoustic Wave (saw) Transducers

2005 ◽  
Author(s):  
K. Bodenhofer ◽  
A. Hierlemann ◽  
G. Noetzel ◽  
U. Weimar ◽  
W. Gopel
Keyword(s):  
Acoustic Wave ◽  
Surface Acoustic Wave ◽  
Gas Sensing ◽  
Bulk Acoustic Wave

scholarly journals Bulk and Surface Acoustic Wave Sensor Arrays for Multi-Analyte Detection: A Review

Sensors ◽  
2019 ◽  
Vol 19 (24) ◽  
pp. 5382 ◽  
Author(s):  
Kerstin Länge
Keyword(s):  
Acoustic Wave ◽  
Surface Acoustic Wave ◽  
System Integration ◽  
Gas Sensing ◽  
Sensor Arrays ◽  
Bulk Acoustic Wave ◽  
Virtual Sensor ◽  
Saw Sensor ◽  
Signal Evaluation ◽  
Analyte Detection

Bulk acoustic wave (BAW) and surface acoustic wave (SAW) sensor devices have successfully been used in a wide variety of gas sensing, liquid sensing, and biosensing applications. Devices include BAW sensors using thickness shear modes and SAW sensors using Rayleigh waves or horizontally polarized shear waves (HPSWs). Analyte specificity and selectivity of the sensors are determined by the sensor coatings. If a group of analytes is to be detected or if only selective coatings (i.e., coatings responding to more than one analyte) are available, the use of multi-sensor arrays is advantageous, as the evaluation of the resulting signal patterns allows qualitative and quantitative characterization of the sample. Virtual sensor arrays utilize only one sensor but combine it with enhanced signal evaluation methods or preceding sample separation, which results in similar results as obtained with multi-sensor arrays. Both array types have shown to be promising with regard to system integration and low costs. This review discusses principles and design considerations for acoustic multi-sensor and virtual sensor arrays and outlines the use of these arrays in multi-analyte detection applications, focusing mainly on developments of the past decade.

Boosting of NO2 Gas Sensing Performances Using GO-PEDOT:PSS Nanocomposite Chemical Interface Coated on Langasite-based Surface Acoustic Wave Sensor

2021 ◽  
pp. 130267
Author(s):  
Kedhareswara Sairam Pasupuleti ◽  
Maddaka Reddeppa ◽  
Dong-Jin Nam ◽  
Na-Hyun Bak ◽  
Koteswara Rao Peta ◽  
...  
Keyword(s):  
Acoustic Wave ◽  
Surface Acoustic Wave ◽  
Gas Sensing ◽  
Acoustic Wave Sensor
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