Beilstein J. Nanotechnol.2019,10, 2364–2373, doi:10.3762/bjnano.10.227
sensitivity (up to 17 times), selectivity and improves the response dynamics of the sensors.
Keywords: gold-decoratedMWCNTs; multiwall carbon nanotubes (MWCNTs); self-assembled monolayers (SAMs); sensitivity; selectivity; vapour sensor; Introduction
Aromatic volatile organic compounds (VOCs) such as
1011), operating at 100 kV. An Alpha FTIR spectrometer (Bruker, France) equipped with an ATR platinum crystal diamond module was used, in absorbance mode, to obtain the infrared spectra of the gold-decoratedMWCNTs before and after the deposition of the SAM monolayer. This technique provides useful
. The considerable decrease in the conductivity is due to the oxidizing nature of the injected vapours. As the tested oxygen-treated and gold-decoratedMWCNTs are p-type semiconductors, the adsorption of the oxidant vapour molecules leads to a transfer of the majority carriers of p-type semiconductors
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Figure 1:
Synoptic structure of the sensor before and after the HDT deposition.