A5009549104- Gas Sensing Nanomaterials and Sensors
- 2D Materials and Applications
- Transition Metal Oxide Nanomaterials
- Advanced Chemical Sensor Technologies
- Analytical Chemistry and Sensors
- MXene and MAX Phase Materials
- Advanced biosensing and bioanalysis techniques
- Pickering emulsions and particle stabilization
- Food Waste Reduction and Sustainability
- Advanced Thermoelectric Materials and Devices
- Recycling and Waste Management Techniques
- Characterization and Applications of Magnetic Nanoparticles
- Micro and Nano Robotics
- Nanocomposite Films for Food Packaging
- Conducting polymers and applications
Universitat Rovira i Virgili
2019-2024
Institut de Ciència de Materials de Barcelona
2019
In this work tungsten disulphide nanostructures loaded with platinum-oxide (PtO), or palladium-oxide (PdO) were grown directly onto alumina substrates. This was achieved using a combination of aerosol-assisted chemical vapour deposition (AA-CVD) method atmospheric pressure CVD technique. At first, oxide nanowires either PtO PdO nanoparticles successfully co-deposited via AA-CVD followed by sulfurization at 900 °C in the next step. The morphological, structural, and characteristics...
The successful controlled growth of edge enriched 3D assemblies MoS 2 nanosheets for the fabrication dually selective NH 3 and NO gas sensors using a single step atmospheric pressure CVD method.
Herein, we present, for the first time, a chemoresistive-type gas sensor composed of two-dimensional WSe2, fabricated by simple selenization tungsten trioxide (WO3) nanowires at atmospheric pressure. The morphological, structural, and chemical composition investigation shows growth vertically oriented three-dimensional (3D) assemblies edge-enriched WSe2 nanoplatelets arrayed in nanoflower shape. sensing properties flowered (2H-WSe2) are investigated thoroughly toward specific gases (NH3 NO2)...
Nanostructured tungsten disulfide (WS2) is one of the most promising candidates for being used as active nanomaterial in chemiresistive gas sensors, it responds to hydrogen at room temperature. This study analyzes sensing mechanism a nanostructured WS2 layer using near-ambient-pressure X-ray photoelectron spectroscopy (NAP-XPS) and density functional theory (DFT). The W 4f S 2p NAP-XPS spectra suggest that makes physisorption on surface temperature chemisorption atoms temperatures above 150...
Ambient pressure X-ray photoelectron spectroscopy (APXPS) is combined with simultaneous electrical measurements and supported by density functional theory calculations to investigate the sensing mechanism of tungsten disulfide (WS2)-based gas sensors in an operando dynamic experiment. This approach allows for direct correlation between changes surface potential resistivity WS2 active layer under realistic operating conditions. Focusing on toxic gases NO2 NH3, we concurrently demonstrate...
Herein, we report for the first time on fabrication of a hybrid material consisting Cu <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> O nanoparticles-decorated multilayered tungsten disulfide nanostructures and demonstrate their remarkable gas sensing characteristics towards hydrogen sulfide gas. In step, continuous film WS2 was deposited directly commercial alumina substrate by adopting facile route combining aerosol-assisted chemical...
The cluster gun technique can go beyond fabrication of single particles into controlled and reproducible self-assembly NPs as they form.
In this paper, we demonstrate a facile route to synthesize continuous film of WS <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> deposited by combination aerosol -assisted chemical vapor deposition (AACVD) with H free atmospheric pressure CVD technique. This synthesis strategy allows us direct integration the sensing material onto sensor transducer high growth yield and uniform coverage. SEM Raman spectroscopy were used investigate...
This paper presents a methodology to quantify oxidizing and reducing gases using n-type p-type chemiresistive sensors, respectively. Low temperature sensor heating with pulsed UV or visible light modulation is used together the application of fast Fourier transform (FFT) extract response features. These features are further processed via principal component analysis (PCA) regression (PCR) for achieving gas discrimination building concentration prediction models R2 values up 98% RMSE as low...
Recently layered inorganic materials analogues to graphene such as two-dimensional transition metal dichalcogenides (2D TMDs) have emerged promising building blocks for the gas sensing industry. Indeed, they show impressive semiconducting properties, tunable band gap, large surface area and excellent adsorbing capacities. Herein, we report first time, on a single step synthesis of 3D assembly WS <sub xmlns:mml="http://www.w3.org/1998/Math/MathML"...
Herein, we demonstrate gas sensing characteristics of metal-decorated WS <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</inf> towards ammonia (NH3) detection at moderate temperature. Chemiresistive sensors are fabricated using a combination chemical vapor deposition method with sputter technique. WO xmlns:xlink="http://www.w3.org/1999/xlink">3</inf> nanowires grown via aerosol assisted technique sulfurized to form tungsten disulfide...
In this work, we demonstrate the feasibility and suitability of a hybrid tungsten disulfide (WS <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</inf> ) nanosheet loaded platinum oxide (PtO) nanomaterial, for detection dimethyl methylphosphonate (DMMP), simulant sarin nerve agent. To best our knowledge, there have been no reports on direct use such material agents. The fabricated sensors showed excellent, reliable, sensitive fast responses at...
In this work we report a new methodology for the direct growth, onto sensor transducer, of multilayer transition metal dichalcogenides material (TMDs) such as tungsten diselenide (WSe2) and disulfide (WS2), via combination aerosol assisted chemical vapor deposition (AA-CVD) atmospheric pressure CVD technique (APCVD). This led to uniform films with high yield coverage, making it possible overcome shortcomings many TMDs synthesis techniques. The morphology compositions were investigated....