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Issue 23, 2018
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Calixarene functionalization of TiO2 nanoarrays: an effective strategy for enhancing the sensor versatility

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Abstract

Sensitive, selective, low-cost, and simply designed sensors for gases and analytes are highly attractive. The rational synergy between calixarenes (CAs) and titania nanorods (TiO2NRs) and nanotubes (TiO2NTs) gives rise to completely new types of behaviors that open unprecedented applications. First, the geometric building of NRs and NTs leads to excellent signal amplification and transduction. Second, grafted CAs create self-assembled monolayers (SAMs) that switch order under a thermal stimulus and generate a stimuli-responsive behavior, thus promoting modulated sensing properties. Third, CAs accelerate gas diffusion in the sensor, yielding a fast, sensitive, selective, and reproducible response to H2 at room temperature (RT). In addition, these systems may act as sensors for other analytes, such as the pesticide profenofos (PFF).

Graphical abstract: Calixarene functionalization of TiO2 nanoarrays: an effective strategy for enhancing the sensor versatility

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Supplementary files

Article information


Submitted
27 Feb 2018
Accepted
11 May 2018
First published
11 May 2018

J. Mater. Chem. A, 2018,6, 10649-10654
Article type
Communication

Calixarene functionalization of TiO2 nanoarrays: an effective strategy for enhancing the sensor versatility

I. Oueslati, A. Ghrairi, E. S. Ribeiro, L. A. E. Batista de Carvalho, J. M. Gil and J. A. Paixao, J. Mater. Chem. A, 2018, 6, 10649
DOI: 10.1039/C8TA01906A

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