Metalloporphyrins-modified carbon nanotubes networked films-based chemical sensors for enhanced gas sensitivity

Penza, M.; Rossi, Riccardo; Alvisi, Marco; Signore, M.A.; Serra, Emanuele; Paolesse, Roberto; D’Amico, A.; Natale, Corrado Di

doi:10.1016/j.snb.2008.12.060

Cited by 67 publications

(40 citation statements)

References 25 publications

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“…9 They are able to bind nonspecifically with different analytes through Van der Waal forces, hydrogen bonding and coordination interaction with the central metal ion. 10,11 Further, changes in certain physical properties upon porphyrin-analyte binding makes porphyrins as an attractive class of sensing material. The sensing capabilities of porphyrin thin film have been demonstrated based on optical or mass detection.…”

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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“…Only a handful of previous studies have examined metalloporphyrin-CNT chemiresistive sensors. [20][21][22] These sensors have the advantage of being readily integrated into circuitry for mobile, low-power operation in inexpensive and compact electronic devices. 23 Previous studies on porphyrins in chemical sensing note that despite their promise for this application, a drawback that limits their usage is that they are relatively unselective.…”

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confidence: 99%

Single-Walled Carbon Nanotube–Metalloporphyrin Chemiresistive Gas Sensor Arrays for Volatile Organic Compounds

2015

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A chemiresistive sensor array was created from single-walled carbon nanotubes (SWCNTs) by non-covalent modification with late first-row transition metal complexes of meso-tetraphenylporphyrin. The responses to vapors of various volatile organic compounds (VOCs) were strong and were subjected to statistical analyses that enabled the successful classification of representative VOCs into five different categories (aliphatic hydrocarbons, alcohols, ketones, aromatic hydrocarbons, and amines) with 98% accuracy. With the exception of amines, which are capable of strong charge transfer interactions, the basis of classification appears to correlate with the differences in the solubility properties of the porphyrin compounds in the various VOCs as solvents. This feature suggests that an analyte with greater intermolecular affinity for the SWCNT-porphyrin composite will induce a greater response. These results further demonstrate the potential for porphyrin-functionalized SWCNT-based electronic noses for applications in inexpensive, portable chemical sensors for the identification of VOCs.

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“…The use of heterogeneous catalysts could solve some of these difficulties. [11][12][13][14] One of the most attractive supports to immobilize catalysts are CNTs that have been used in lots of applications such as, nano sensors for gas sensing and gas adsorption [15] biological and medical chemistry [16] and oxidation of olefins [17,18] and oxidation of sulfides with numerous oxidants such as PhIO, TBHP, H 2 O 2 , TBAP and UHP. [1,3,[19][20][21][22] In the present research the oxidation of sulfides catalyzed by a manganese porphyrin supported on carbon nanotubes (MnTHPPOAc@MWCNT) has been investigated.…”

Section: Introductionmentioning

confidence: 99%

Highly Selective and Green Oxidation of Sulfides with Urea Hydrogen Peroxide in the Presence of Mn(III) Porphyrin Supported onto Carbon Nanotubes

Rayati¹,

Chegini²

2016

MHC

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Metalloporphyrins-modified carbon nanotubes networked films-based chemical sensors for enhanced gas sensitivity

Cited by 67 publications

References 25 publications

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

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

Single-Walled Carbon Nanotube–Metalloporphyrin Chemiresistive Gas Sensor Arrays for Volatile Organic Compounds

Highly Selective and Green Oxidation of Sulfides with Urea Hydrogen Peroxide in the Presence of Mn(III) Porphyrin Supported onto Carbon Nanotubes

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