scholarly journals AR2.3 - Design of an SH-SAW Sensor Array with High Sensitivity and Partial Selectivity Using Polymer-Plasticizer Coatings

2018 ◽  
Author(s):  
F. Josse ◽  
N. Post ◽  
K. Sothivelr ◽  
F. Bender ◽  
A. J. Ricco
Keyword(s):  
Sensor Array ◽  
High Sensitivity ◽  
Saw Sensor

scholarly journals Metal Oxide Nanorods-Based Sensor Array for Selective Detection of Biomarker Gases

Sensors ◽  
2021 ◽  
Vol 21 (5) ◽  
pp. 1922
Author(s):  
Gwang Su Kim ◽  
Yumin Park ◽  
Joonchul Shin ◽  
Young Geun Song ◽  
Chong-Yun Kang
Keyword(s):  
Real Time ◽  
Sensor Array ◽  
High Sensitivity ◽  
Gas Analysis ◽  
Diagnostic Methods ◽  
Real Time Monitoring ◽  
Non Invasive ◽  
Sensitivity And Selectivity ◽  
Breath Gas Analysis ◽  
Angle Method

The breath gas analysis through gas phase chemical analysis draws attention in terms of non-invasive and real time monitoring. The array-type sensors are one of the diagnostic methods with high sensitivity and selectivity towards the target gases. Herein, we presented a 2 × 4 sensor array with a micro-heater and ceramic chip. The device is designed in a small size for portability, including the internal eight-channel sensor array. In2O3 NRs and WO3 NRs manufactured through the E-beam evaporator’s glancing angle method were used as sensing materials. Pt, Pd, and Au metal catalysts were decorated for each channel to enhance functionality. The sensor array was measured for the exhaled gas biomarkers CH3COCH3, NO2, and H2S to confirm the respiratory diagnostic performance. Through this operation, the theoretical detection limit was calculated as 1.48 ppb for CH3COCH3, 1.9 ppt for NO2, and 2.47 ppb for H2S. This excellent detection performance indicates that our sensor array detected the CH3COCH3, NO2, and H2S as biomarkers, applying to the breath gas analysis. Our results showed the high potential of the gas sensor array as a non-invasive diagnostic tool that enables real-time monitoring.

A high sensitivity wireless mass-loading surface acoustic wave DNA biosensor

2014 ◽  
Vol 28 (07) ◽  
pp. 1450056 ◽  
Author(s):  
Hua-Lin Cai ◽  
Yi Yang ◽  
Yi-Han Zhang ◽  
Chang-Jian Zhou ◽  
Cang-Ran Guo ◽  
...  
Keyword(s):  
Acoustic Wave ◽  
Surface Acoustic Wave ◽  
Dna Sequences ◽  
Biological Treatment ◽  
High Performance ◽  
Processing System ◽  
High Sensitivity ◽  
Treatment Method ◽  
Saw Sensor ◽  
Target Dna

In this paper, a surface acoustic wave (SAW) biosensor with gold delay area on LiNbO 3 substrate detecting DNA sequences is proposed. By well-designed device parameters of the SAW sensor, it achieves a high performance for highly sensitive detection of target DNA. In addition, an effective biological treatment method for DNA immobilization and abundant experimental verification of the sensing effect have made it a reliable device in DNA detection. The loading mass of the probe and target DNA sequences is obtained from the frequency shifts, which are big enough in this work due to an effective biological treatment. The experimental results show that the biosensor has a high sensitivity of 1.2 pg/ml/Hz and high selectivity characteristic is also verified by the few responses of other substances. In combination with wireless transceiver, we develop a wireless receiving and processing system that can directly display the detection results.

Study of the Gas Sensor Array Based on Micro-Machined Ceramic Hotplate

2013 ◽  
Vol 631-632 ◽  
pp. 1117-1122 ◽  
Author(s):  
Yan Bing Xue ◽  
Zhe Nan Tang
Keyword(s):  
Gas Sensor ◽  
Sensor Array ◽  
Thermal Response ◽  
High Sensitivity ◽  
Quantitative Detection ◽  
Average Temperature ◽  
Gas Sensor Array ◽  
Pd Doping ◽  
Constant Heating ◽  
Mixed Gases

In order to improve the thermal stability of silicon micro hotplate, a ceramic hotplate with structure of suspending bridge was designed. The steady-state thermal response of the hotplate and the structure of the micro-heater were simulated by using the finite element method. By using conventional microelectronics technology and laser micro processing technology, the microstructures with thickness of 100 μm and bridge width of 2 mm were produced. The test results show that the ceramic hotplate has higher working temperature than traditional silicon hotplate, and it can be worked steadily at the average temperature of 630 °C on 1.5W heating power. Taking ceramic hotplate as heating platform and nano-SnO2 materials with Pd doping concentration of 0.2 at.% and 10 at.% as sensitive materials respectively, the array with two gas sensors was designed and fabricated. The gas sensor array can be used to detect single gas of CO or CH4 with high sensitivity and good selectivity when it works with constant heating voltage. When the sensor array works with periodic voltage heating pulse, it can realize quantitative detection for mixed gases of CO and CH4.

New miniaturized SAW-sensor array for organic gas detection driven by multiplexed oscillators

2000 ◽  
Vol 65 (1-3) ◽  
pp. 169-172 ◽  
Author(s):  
M Rapp ◽  
J Reibel ◽  
A Voigt ◽  
M Balzer ◽  
O Bülow
Keyword(s):  
Sensor Array ◽  
Gas Detection ◽  
Saw Sensor

scholarly journals Optimized design of a SAW sensor array for chemical warfare agents simulants detection

2009 ◽  
Vol 1 (1) ◽  
pp. 232-235 ◽  
Author(s):  
D. Matatagui ◽  
J. Martí ◽  
M.J. Fernández ◽  
J.L. Fontecha ◽  
J. Gutiérrez ◽  
...  
Keyword(s):  
Sensor Array ◽  
Chemical Warfare Agents ◽  
Chemical Warfare ◽  
Optimized Design ◽  
Saw Sensor ◽  
Warfare Agents
Sign in / Sign up

Export Citation Format

Share Document