The light enhanced gas selectivity of one-pot grown porphyrins coated ZnO nanorods

Sivalingam, Yuvaraj; Magna, Gabriele; Pomarico, Giuseppe; Catini, Alexandro; Martinelli, Eugenio; Paolesse, Roberto; Natale, Corrado Di

doi:10.1016/j.snb.2013.07.044

Cited by 34 publications

(24 citation statements)

References 32 publications

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“…Results show that the increase of sensitivity due to the exposure to light is correlated with the Lewis basicity of the volatile compound 16 . Then in an array configuration the use of sensors operated in dark and in light might emphasise the detection of Lewis basis.…”

Section: One-pot Porphyrins-zinc Oxide Synthesismentioning

confidence: 98%

Photo-assisted chemical sensors

2014

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Section: One-pot Porphyrins-zinc Oxide Synthesismentioning

confidence: 98%

Photo-assisted chemical sensors

2014

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“…The functionalization procedure was complemented by a one-pot method, where porphyrin is added to the hydrothermal precursor solution. In this way, the resulting nanorods are less sharp and defined, but, on the other hand, since the porphyrins cooperate with the ZnO growth, they tend to reduce the self-aggregation and to achieve a more complete coverage onto the ZnO surface, as evidenced by SEM and TEM analyses [78]. A comparison between the two methods, by measuring the surface potential with a Kelvin probe, showed the complementarity between the two approaches.…”

Section: Porphyrins Functionalized Conductive Materialsmentioning

confidence: 98%

Porphyrins for olfaction mimic: The Rome Tor Vergata approach

Natale

Martinelli

Mandoj

et al. 2017

J. Porphyrins Phthalocyanines

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ABSTRACT:The impressive chemistry shown by porphyrins in natural systems is particularly attractive for exploitation in chemical sensors. In these devices the sensing mechanisms can mimic most of the porphyrin biological reactivity, such as reversible binding, activation of small molecules, redox activity, and photoactivated processes. The simultaneous presence of multiple binding mechanisms allows porphyrins to interact with a large variety of analytes. This feature reduces the selectivity, but prompts the development of sensor arrays, where the cross-selectivity of more sensors is used to classify and identify samples characterized by a complex composition. Since 1995 the Sensors Group of the University of Rome Tor Vergata has exploited these features to prepare sensor arrays based on different transducers and aimed at several applications. These kinds of devices have been reported as electronic noses (gaseous phase analytes) and electronic tongues (liquid phase analytes) to underline that their working mechanisms are tentatively similar to that of biological senses. We report here some of the results obtained.

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“…The first evidence of the importance of the fabrication method was obtained in the case of ZnO nanorods. In [ 22 ], the ZnO nanorods precursor solution was enriched with a water soluble porphyrin. SEM and TEM images showed that porphyrin concentration influenced the final shapes and arrangement of both nanorods and nanoparticles [ 23 , 24 ].…”

Section: Chemical Sensor Applicationsmentioning

confidence: 99%

Porphyrin-Functionalized Zinc Oxide Nanostructures for Sensor Applications

Ekrami

Emam‐Djomeh

Yarmand

et al. 2018

Sensors

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Hybrid materials made of wide band gap semiconductors and dye molecules are largely studied mainly for photovoltaic applications. However, these materials also show interesting chemical sensitivity. Zinc oxides (ZnO) and porphyrins are good examples of a metal oxide semiconductor and a dye molecule that give rise to a hybrid material with such interesting properties. ZnO has been studied for sensors, optoelectronics, electronic devices, photo-anodes for dye-sensitized solar cells, and for mechanical energy harvesting. Porphyrins, on the other side, can be synthesized in order to mimic their roles in living systems such as oxygen transport and charge transfer for catalytic processes in animals and photosynthesis in plants. This paper provides a review of the chemical sensing properties of porphyrin-capped ZnO nanostructures. The methodologies to functionalize the ZnO surface with porphyrins are illustrated with emphasis on the relationships between the material preparation and its sensing properties. The development of sensors is described through the application of the hybrid materials to different transducers.

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The light enhanced gas selectivity of one-pot grown porphyrins coated ZnO nanorods

Cited by 34 publications

References 32 publications

Photo-assisted chemical sensors

Photo-assisted chemical sensors

Porphyrins for olfaction mimic: The Rome Tor Vergata approach

Porphyrin-Functionalized Zinc Oxide Nanostructures for Sensor Applications

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