Mass‐sensitive detection of solvent vapors: Predicting sensor effects

Dickert, Franz L.; Stathopulos, Helen; Reif, Martin

doi:10.1002/adma.19960080617

Cited by 9 publications

(1 citation statement)

References 33 publications

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“…As a result, the measurement process affects the reaction ability/specificity of the receptor centers interaction with molecules detected. A radically different approach can be realized using the mass sensitive transducers [16]. It provides separation of chemical interaction processes from their transformation into a corresponding sensor response.…”

Section: Direct and Indirect Methods For Cim Formationmentioning

confidence: 99%

Digital aroma technology for chemical sensing: temporal chemical images of complex mixtures

Kruglenko¹

2000

Semicond. Phys. Quantum Electron. Optoelectron.

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The reliability of Electronic nose applications is mainly based on the sensitivity, repeatability and discernment properties of the sensors composing the array. Due to nature of the chosen sensitive layers, the sensors are particularly suitable to classify environments in which compounds with various chemical functionality play a key role. This article is focusing on the novel strategy aimed at the improving the quality and quantity of chemical information from the sensing instruments based on incorporation kinetic aspects of the array response for perfect formation and improved discrimination of chemical images of the probes. We describe a procedure for reducing both time response and number of elements of gas sensor arrays based on principal component analysis. Thus, digital aroma technology may be used not only as background for formation of chemical images using intelligent sensor massifs but also as an effective experimental tool for characterization and selection coatings with desired chemical functionality by using time-resolved pattern recognition.

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Section: Direct and Indirect Methods For Cim Formationmentioning

confidence: 99%

Digital aroma technology for chemical sensing: temporal chemical images of complex mixtures

Kruglenko¹

2000

Semicond. Phys. Quantum Electron. Optoelectron.

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Polyphenylen-Dendrimere als empfindliche und selektive Sensorschichten

et al. 2001

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Polyphenylen-Dendrimere sind monodisperse Makromoleküle, die auf Grund ihres starren Grundgerüsts stabile Hohlräume im Inneren bilden. Diese Eigenschaft unterscheidet sie von Dendrimeren, die aus flexiblen, aliphatischen Gruppen bestehen, und empfiehlt sie als attraktive Werkstoffe für die sensorische Überwachung flüchtiger Verbindungen mit Hilfe von massenempfindlichen Resonatoren, z. B. auf Basis von Quarz-Mikrowaagen (quartz microbalance, QMB). [1] Diese Form der Sensorik gewinnt in vielen Berei-durch Ionenaustausch und Affinitätschromatographie gereinigt. Das Assay-System zur Beurteilung der Hemmeigenschaften der Verbindungen basierte auf der Übertragung von radioaktiv markierter [ 3 H]Galactose vom Donor UDP-Galactose (50 mm) auf das Acceptormolekül LacNAc(CH 2 ) 8 -CO 2 CH 3 (0.36 mm) durch pa(1-3)GalT (10 mm) im Puffersystem aus 100 mm Natriumcacodylat (pH 6.5), 15 mm MnCl 2 und 50 mg mL À1 BSA (Rinderserumalbumin) bei 37 8C während 30 min. Das radioaktiv markierte Produkt [ 3 H]Gala(1-3)LacNAc(CH 2 ) 8 COOCH 3 wurde vom nichtradioaktiven Material durch Adsorption an eine SepPac-C 18 -Säule getrennt, wie in Lit.[20] beschrieben ist. Das Verhältnis von inkorporierter zu totaler Radioaktivität ist proportional zur Aktivität von pa(1-3)GalT. Es wurden Vorsichtsmaûnahmen ergriffen, um sicherzustellen, dass das Enzym limitierend ist und die Konzentrationen aller anderen Cofaktoren nahe am Sättigungswert sind. Genau genommen ist die berichtete Hemmung ein IC 50 -Wert, weil nicht mit unterschiedlichen Cofaktor-Konzentrationen geprüft wurde.

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Molecularly imprinted polymers for optochemical sensors

Dickert

Thierer

1996

Advanced Materials

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ADVANCED MATERIALSCommunications tage. EL originates from the compensated region where the built-in electric field is a maximum. Note, however, that when the external bias is applied under steady state conditions, the external field is opposite to the built-in field so that near threshold, the net internal field is small during operation. The observed decrease in the PL within the junction is particularly interesting since external quantum efficiencies of LECs are comparable with those of polymer LEDs fabricated from the same semiconducting polymer.[lA1 This suggests that the quantum efficiency of the EL is a larger fraction of the PL than in conventional polymer light-emitting diodes.We emphasize once again that the results presented here were obtained with the LEC in the surface cell configuration with relatively widely spaced electrodes. For sandwich cells, the width of the junction must be less than the sub-micron thickness of the polymer layer, implying that the boundary conditions play a more critical role. ExperimentalSurface cell LECs were prepared with pairs of gold strips (5 mm long, 2 mm wide) as the contact electrodes, separated by a (approximately) 20 pm gap. Five pairs were fabricated onto an 1.5 x 1.5 cm2 glass substrate by vapor deposition through a shadow mask. A layer of chromium was

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Mass‐sensitive detection of solvent vapors: Predicting sensor effects

Cited by 9 publications

References 33 publications

Digital aroma technology for chemical sensing: temporal chemical images of complex mixtures

Digital aroma technology for chemical sensing: temporal chemical images of complex mixtures

Polyphenylen-Dendrimere als empfindliche und selektive Sensorschichten

Molecularly imprinted polymers for optochemical sensors

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