Effective Use of Molecular Recognition in Gas Sensing:  Results from Acoustic Wave and in Situ FT-IR Measurements

Hierlemann, Andreas; Ricco, Antonio J.; Bodenhöfer, and Karl; Göpel, Wolfgang

doi:10.1021/ac981311j

Cited by 61 publications

(59 citation statements)

References 57 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…b) The operando approach: An in situ cell combines surface acoustic wave (SAW) sensor measurements with direct, in situ Fourier transform infrared external-reflectance spectroscopy (FT-IR-ERS) and probing surface of the sensing films during analyte exposure. [29,36] A. Gurlo and R. Riedel Reviews 5) with simultaneous monitoring of gas composition; on-line gas analysis in gas sensing plays a twofold role: the output compositions and concentrations provide data about reaction products and possible reaction paths and the input concentration verifies the sensor input data (concentration of the component to be detected).…”

Section: Introduction: In Situ and Operando Spectroscopy In Gas Sensingmentioning

confidence: 99%

In Situ and Operando Spectroscopy for Assessing Mechanisms of Gas Sensing

2007

View full text Add to dashboard Cite

The mechanistic description of gas sensing on inorganic, organic, and polymeric materials is of great scientific and technological interest. The understanding of surface and bulk reactions responsible for gas-sensing effects will lead to increased selectivity and sensitivity in the chemical determination of gases and thus to the development of better sensors. In recent years, spectroscopic tools have been developed to follow the physicochemical processes taking place in an active sensing element in real time and under operating conditions. Thus, the monitoring of the processes in "living" gas sensors is no longer an unsolvable problem. This Review gives an overview of in situ and operando spectroscopic techniques for the study of gas-sensing mechanisms on solid-state sensors.

show abstract

Section: Introduction: In Situ and Operando Spectroscopy In Gas Sensingmentioning

confidence: 99%

In Situ and Operando Spectroscopy for Assessing Mechanisms of Gas Sensing

2007

View full text Add to dashboard Cite

show abstract

“…A number of chemical sensors have been implemented for direct detection of analytes in both air and water based on ATR-FTIR strategies [16][17][18]. Infrared reflection methods have also been applied to provide insight into the interaction between gas-phase analytes and sensor coatings [19,20].…”

mentioning

confidence: 99%

ATR-FTIR spectroscopic analysis of sorption of aqueous analytes into polymer coatings used with guided SH-SAW sensors

Jones

Johnson

et al. 2005

IEEE Sensors J.

View full text Add to dashboard Cite

Attenuated total internal reflectance Fourier transform infrared (ATR-FTIR) spectroscopy was used for the investigation of sorption of aqueous solutions of analytes into polymer coatings. A series of simple model polymers: poly(dimethylsiloxane) (PDMS), poly(epichlorhydrin) (PECH), and poly(isobutylene) (PIB) films and analytes: aqueous solutions of ethylbenzene, xylenes, toluene, and nitrobenzene were used to evaluate the use of ATR-FTIR spectroscopy as a screening tool for sensor development. The ratios of integrated infrared absorption bands provided a simple and efficient method for predicting trends in partition coefficients. Responses of polymer-coated guided shear horizontal surface acoustic wave (SH-SAW) sensor platforms to the series of analytes, using polymer coatings with similar viscoelastic properties, were consistent with ATR-FTIR predictions. Guided SH-SAW sensor responses were linear in all cases with respect to analyte concentration in the tested range. Comparison of ATR-FTIR data with guided SH-SAW sensor data identifies cases where mass loading is not the dominant contribution to the response of the acoustic wave sensor. ATR-FTIR spectra of nitrobenzene, coupled with computational chemistry, provided additional insight into analyte/polymer interactions.

show abstract

“…The value of 4 mg/L of parathion may be the concentration at which plasticization effect (hence viscoelastic loading) is significantly large and the region of linear behaviour with respect to analyte concentration is no longer valid. 36 It is noted that for this thickness, 500 μg/L of parathion could not be detected with the present system. Next, the thickness of the BPA-HMTS layer was varied from 0.25 μm to 1.23 μm.…”

Section: Ieee Sensorsmentioning

confidence: 52%

Analysis of the Detection of Organophosphate Pesticides in Aqueous Solutions Using Hydrogen-Bond Acidic Coating on SH-SAW Devices

et al. 2012

View full text Add to dashboard Cite

Effective Use of Molecular Recognition in Gas Sensing: Results from Acoustic Wave and in Situ FT-IR Measurements

Abstract: Figure 14. SAW sensor responses for coatings of the reference polymers PIB and PEUT and the metal coordination compound Ni-Cam upon exposure to various analytes, normalized to the responses to n-octane.

Cited by 61 publications

References 57 publications

In Situ and Operando Spectroscopy for Assessing Mechanisms of Gas Sensing

In Situ and Operando Spectroscopy for Assessing Mechanisms of Gas Sensing

ATR-FTIR spectroscopic analysis of sorption of aqueous analytes into polymer coatings used with guided SH-SAW sensors

Analysis of the Detection of Organophosphate Pesticides in Aqueous Solutions Using Hydrogen-Bond Acidic Coating on SH-SAW Devices

Contact Info

Product

Resources

About