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Beilstein J. Nanotechnol. 2019, 10, 2364–2373, doi:10.3762/bjnano.10.227
Figure 1: Synoptic structure of the sensor before and after the HDT deposition.
Figure 2: HRTEM image of MWCNTs decorated with Au nanoparticles at a magnification of (a) 300 K, (b) 600 K an...
Figure 3: Infrared spectra of Au-MWCNT and SAM/Au-MWCNT layers.
Figure 4: Au-MWCNT sensor response for different concentrations of the injected vapours of (a) toluene and (b...
Figure 5: HDT/Au-MWCNT sensor responses for different concentrations of the injected vapours of (a) toluene a...
Figure 6: Calibration curves for Au-MWCNT and HDT/Au-MWCNT sensors for (a) toluene and (b) benzene aromatic V...
Figure 7: Calibration curves for the HDT/Au-MWCNT sensor for methanol and acetone nonaromatic VOC detection.
Figure 8: (a) Response and (b) recovery times of Au-MWCNT and HDT/Au-MWCNT sensors towards tested vapours.
Beilstein J. Nanotechnol. 2019, 10, 565–577, doi:10.3762/bjnano.10.58
Figure 1: TEM images of MWCNTs decorated with gold nanoparticles.
Figure 2: Raman spectra for the different thiols studied. A) C3H8S; B) C3H6O2S; C) C16H34S; D) C16H32O2S.
Figure 3: a) Comparison between unbound (i.e., free) thiol and hybrid SAM-MWCNTs for C–S and C–C elongations,...
Figure 4: (a) X-ray photoelectron survey spectra recorded on Au-CNTs (blue), short-chain thiol-Au-CNTs (red) ...
Figure 5: a) Sensor response to nitrogen dioxide exposure and recovery cycles in air, and b) calibration curv...
Figure 6: Electrostatic interactions pathways between –COOH functional groups and nitrogen dioxide (a, b), wa...
Figure 7: Calibration curves for different concentrations of nitrogen dioxide under humid conditions (50% R.H...
Figure 8: a) Sensor response to ethanol exposure and recovery cycles in air. b) Calibration curves for the di...
Beilstein J. Nanotechnol. 2019, 10, 105–118, doi:10.3762/bjnano.10.10
Figure 1: TEM images for COOH–CNTs (a) before acidic treatment and (b) after acidic treatment.
Figure 2: Different decoration homogeneity using different solvents, methanol (a), ethanol (b), DMF (c) and a...
Figure 3: Different decoration densities for different decoration ratios of 1:1 (a), 1:1.3 (b) and 1:1.5 (c).
Figure 4: High magnification HRTEM images of MWCNTs decorated with Fe2O3 nanoparticles. The inset shows the e...
Figure 5: XPS core level spectra of Fe 2p with a fitting curve for sample C (a), O 1s (b) and C 1s (c) for th...
Figure 6: XRD pattern for Fe2O3 nanoparticles (a) and decorated CNTs with Fe2O3 nanoparticles (b).
Figure 7: Electrical resistance of the samples as a function of time.
Figure 8: Effect of decoration ratio on the gas sensing performance.
Figure 9: TEM images showing nanocluster size (a) after calcination for 15 minutes and 30 minutes for a 1:1.5...
Figure 10: Effect of calcination period on the gas sensing performance.
Figure 11: Effect of layer homogeneity and thickness on the gas sensing performance.
Figure 12: Comparison between gas sensors – performance in both dry and humid conditions.