Investigation of quartz microbalance and ChemFET transduction of molecular recognition events in a metalloporphyrin film

Natale, Corrado Di; Buchholt, Kristina; Martinelli, Eugenio; Paolesse, Roberto; Pomarico, Giuseppe; D’Amico, A.; Lundström, Ingemar; Spetz, Anita Lloyd

doi:10.1016/j.snb.2008.09.055

Cited by 38 publications

(27 citation statements)

References 26 publications

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“…12–16 Porphyrin thin-film based field-effect transistor (FET) also has been reported as a gas sensor. 15,17 Although, the transduction mechanisms of the above mentioned device are simple, fabrication may require use of complex technology. In this regard, chemiresistive sensor based on conductivity change could be the simplest possible transduction mechanism, which requires simple technology for electronic application.…”

Section: Introductionmentioning

confidence: 99%

Porphyrin-Functionalized Single-Walled Carbon Nanotube Chemiresistive Sensor Arrays for VOCs

et al. 2012

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Single-walled carbon nanotubes (SWNTs) have been used extensively for sensor fabrication due to its high surface to volume ratio, nanosized structure and interesting electronic property. Lack of selectivity is a major limitation for SWNTs-based sensors. However, surface modification of SWNTs with a suitable molecular recognition system can enhance the sensitivity. On the other hand, porphyrins have been widely investigated as functional materials for chemical sensor fabrication due to their several unique and interesting physico-chemical properties. Structural differences between free-base and metal substituted porphyrins make them suitable for improving selectivity of sensors. However, their poor conductivity is an impediment in fabrication of prophyrin-based chemiresistor sensors. The present attempt is to resolve these issues by combining freebase- and metallo-porphyrins with SWNTs to fabricate SWNTs-porphyrin hybrid chemiresistor sensor arrays for monitoring volatile organic carbons (VOCs) in air. Differences in sensing performance were noticed for porphyrin with different functional group and with different central metal atom. The mechanistic study for acetone sensing was done using field-effect transistor (FET) measurements and revealed that the sensing mechanism of ruthenium octaethyl porphyrin hybrid device was governed by electrostatic gating effect, whereas iron tetraphenyl porphyrin hybrid device was governed by electrostatic gating and Schottky barrier modulation in combination. Further, the recorded electronic responses for all hybrid sensors were analyzed using a pattern-recognition analysis tool. The pattern-recognition analysis confirmed a definite pattern in response for different hybrid material and could efficiently differentiate analytes from one another. This discriminating capability of the hybrid nanosensor devices open up the possibilities for further development of highly dense nanosensor array with suitable porphyrin for E-nose application.

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Section: Introductionmentioning

confidence: 99%

Porphyrin-Functionalized Single-Walled Carbon Nanotube Chemiresistive Sensor Arrays for VOCs

et al. 2012

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“…Among the mass sensitive transducers, QCMs are the most utilized, due to their simple preparation and operation according to the well-known Sauerbrey equation [16,17]:

Δ f = - \frac{2 f_{0}^{2}}{A \sqrt{μ_{q} ρ_{q}}} Δ m

where f 0 is the resonance frequency of the unloaded QCM, A is the active area of the crystal, μ q and ρ q are the quartz shear modulus (2.947 g cm −1 s −2 ) and density (2.648 g cm −3 ), respectively.…”

Section: Introductionmentioning

confidence: 99%

Respiratory Monitoring by Porphyrin Modified Quartz Crystal Microbalance Sensors

Selyanchyn

Korposh

Wakamatsu

et al. 2011

Sensors

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A respiratory monitoring system based on a quartz crystal microbalance (QCM) sensor with a functional film was designed and investigated. Porphyrins 5,10,15,20-tetrakis-(4-sulfophenyl)-21H,23H-porphine (TSPP) and 5,10,15,20-tetrakis-(4-sulfophenyl)-21H, 23H-porphine manganese (III) chloride (MnTSPP) used as sensitive elements were assembled with a poly(diallyldimethyl ammonium chloride) (PDDA). Films were deposited on the QCM resonators using layer-by-layer method in order to develop the sensor. The developed system, in which the sensor response reflects lung movements, was able to track human respiration providing respiratory rate (RR) and respiratory pattern (RP). The sensor system was tested on healthy volunteers to compare RPs and calculate RRs. The operation principle of the proposed system is based on the fast adsorption/desorption behavior of water originated from human breath into the sensor films deposited on the QCM electrode.

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“…This behavior may be justified considering that for porphyrins the change of capacitance is likely due to polarization vector changes and then to the electric dipole of porphyrins and adsorbate molecule with an effect rather close to that occurring in porphyrins functionalized Field Effect Transistors [21]. In the case of polymer coatings polymer swelling is likely the dominant effect [6] and then Table 1. compounds such as hydrocarbons, for which sorption interactions are dominant, can efficiently be detected by this kind of sensors.…”

Section: Resultsmentioning

confidence: 98%

A sensor array based on mass and capacitance transducers for the detection of adulterated gasolines

Wiziack

Catini

Santonico

et al. 2009

Sensors and Actuators B: Chemical

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Investigation of quartz microbalance and ChemFET transduction of molecular recognition events in a metalloporphyrin film

Cited by 38 publications

References 26 publications

Porphyrin-Functionalized Single-Walled Carbon Nanotube Chemiresistive Sensor Arrays for VOCs

Porphyrin-Functionalized Single-Walled Carbon Nanotube Chemiresistive Sensor Arrays for VOCs

Respiratory Monitoring by Porphyrin Modified Quartz Crystal Microbalance Sensors

A sensor array based on mass and capacitance transducers for the detection of adulterated gasolines

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