6 article(s) from Llobet, Eduard
- Full Research Paper
- Published 04 Dec 2019
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Figure 1: Synoptic structure of the sensor before and after the HDT deposition.
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Figure 2: HRTEM image of MWCNTs decorated with Au nanoparticles at a magnification of (a) 300 K, (b) 600 K an...
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Figure 3: Infrared spectra of Au-MWCNT and SAM/Au-MWCNT layers.
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Figure 4: Au-MWCNT sensor response for different concentrations of the injected vapours of (a) toluene and (b...
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Figure 5: HDT/Au-MWCNT sensor responses for different concentrations of the injected vapours of (a) toluene a...
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Figure 6: Calibration curves for Au-MWCNT and HDT/Au-MWCNT sensors for (a) toluene and (b) benzene aromatic V...
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Figure 7: Calibration curves for the HDT/Au-MWCNT sensor for methanol and acetone nonaromatic VOC detection.
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Figure 8: (a) Response and (b) recovery times of Au-MWCNT and HDT/Au-MWCNT sensors towards tested vapours.
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- Full Research Paper
- Published 27 Feb 2019
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Figure 1: TEM images of MWCNTs decorated with gold nanoparticles.
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Figure 2: Raman spectra for the different thiols studied. A) C3H8S; B) C3H6O2S; C) C16H34S; D) C16H32O2S.
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Figure 3: a) Comparison between unbound (i.e., free) thiol and hybrid SAM-MWCNTs for C–S and C–C elongations,...
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Figure 4: (a) X-ray photoelectron survey spectra recorded on Au-CNTs (blue), short-chain thiol-Au-CNTs (red) ...
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Figure 5: a) Sensor response to nitrogen dioxide exposure and recovery cycles in air, and b) calibration curv...
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Figure 6: Electrostatic interactions pathways between –COOH functional groups and nitrogen dioxide (a, b), wa...
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Figure 7: Calibration curves for different concentrations of nitrogen dioxide under humid conditions (50% R.H...
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Figure 8: a) Sensor response to ethanol exposure and recovery cycles in air. b) Calibration curves for the di...
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- Full Research Paper
- Published 09 Jan 2019
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Figure 1: TEM images for COOH–CNTs (a) before acidic treatment and (b) after acidic treatment.
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Figure 2: Different decoration homogeneity using different solvents, methanol (a), ethanol (b), DMF (c) and a...
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Figure 3: Different decoration densities for different decoration ratios of 1:1 (a), 1:1.3 (b) and 1:1.5 (c).
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Figure 4: High magnification HRTEM images of MWCNTs decorated with Fe2O3 nanoparticles. The inset shows the e...
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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...
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Figure 6: XRD pattern for Fe2O3 nanoparticles (a) and decorated CNTs with Fe2O3 nanoparticles (b).
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Figure 7: Electrical resistance of the samples as a function of time.
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Figure 8: Effect of decoration ratio on the gas sensing performance.
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Figure 9: TEM images showing nanocluster size (a) after calcination for 15 minutes and 30 minutes for a 1:1.5...
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Figure 10: Effect of calcination period on the gas sensing performance.
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Figure 11: Effect of layer homogeneity and thickness on the gas sensing performance.
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Figure 12: Comparison between gas sensors – performance in both dry and humid conditions.
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- Full Research Paper
- Published 25 Oct 2016
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Figure 1: SEM micrograph of as-grown indium oxide nano-octahedra.
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Figure 2: XRD patterns of the pure In2O3 octahedra (top) and a commercially available In2O3 powder (bottom). ...
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Figure 3: Successive response and recovery cycles during exposure to increasing concentrations of nitrogen di...
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Figure 4: Successive response and recovery cycles during exposure to increasing concentrations of nitrogen di...
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Figure 5: Resistance change of an indium oxide sensor suddenly exposed to UV light (the UV diode is switched ...
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Figure 6: Response and recovery cycles of an indium oxide sensor exposed to different concentrations of nitro...
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Figure 7: Successive recovery, response (nitrogen dioxide, 500 ppb) and recovery cycles of an indium oxide se...
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Figure 8: The instantaneous oxidation and reduction rates are defined as Roxi = [S(t + 1) − S(t)]/Δt and Rred...
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Figure 9: Indium oxide sensor response under pulsed UV irradiation. The sensor was operated at room temperatu...
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Figure 10: Indium oxide sensor response under pulsed UV irradiation. The sensor was operated at 50 °C. Every p...
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Figure 11: Indium oxide sensor response under pulsed UV irradiation. The sensor was operated at 100 °C. Every ...
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Figure 12: Analysis of the response of an indium oxide sensor operated at 50 °C under pulsing UV light. The up...
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Figure 13: Calibration curves for the detection of nitrogen dioxide with an indium oxide sensor operated at th...
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Figure 14: Sensor chamber used during the experiments, which can house up to six sensors (left). The chamber i...
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- Full Research Paper
- Published 09 Apr 2015
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Figure 1: TEM images of the Pd-decorated MWCNTs (a) and Pt-decorated MWCNTs (b) resulting from the rf sputter...
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Figure 2: High-resolution XPS spectra in the C 1s and Pd 3d regions of a Pd–MWCNT sensor (top) and the C 1s a...
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Figure 3: Pt-decorated MWCNTs sensor response to (a) ethanol, (b) methanol and (c) acetone vapours.
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Figure 4: Pd-decorated MWCNTs sensor response to (a) ethanol, (b) methanol and (c) acetone vapours.
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Figure 5: (a) Calibration curves of Pt–MWCNT sensors to vapours. (b) Calibration curves of Pd–MWCNT sensors t...
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Figure 6: (a) Response of a Pt- decorated MWCNTs sensor to various concentrations of NO2. (b) Response of Pd-...
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Figure 7: Calibration curves of Pd– MWCNT and Pt–MWCNT sensors to NO2.
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Figure 8: Comparison between the response of Pd–MWCNTs and Pt–MWCNTs to the different gases and vapours teste...
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- Letter
- Published 26 Jun 2014
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Figure 1: FE-SEM images of sensor devices made of VA-CNTs decorated with gold nanoparticles with different CN...
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Figure 2: (a) Top and (b) side SEM views of the VA-CNTs.
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Figure 3: High resolution TEM images of the carbon nanotubes constituting the forests.
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Figure 4: Typical Raman spectrum of VA-CNT sensors.
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Figure 5: TEM images of VA-CNTs decorated with gold nanoparticles.
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Figure 6: XPS survey spectra for pristine VA-CNTs (top, black line) and 150 µm-long VA-CNTs decorated with 6 ...
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Figure 7: XPS core level spectra of C 1s (a) and Au 4f (b) recorded on 150 µm-long VA-CNTs decorated with 6 n...
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Figure 8: Room temperature detection of NO2 for sensors with different CNT lengths. White pulses indicate the...
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