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  1. Article: Gas-Phase Synthesis of Iron Silicide Nanostructures Using a Single-Source Precursor: Comparing Direct-Write Processing and Thermal Conversion.

    Jungwirth, Felix / Salvador-Porroche, Alba / Porrati, Fabrizio / Jochmann, Nicolas P / Knez, Daniel / Huth, Michael / Gracia, Isabel / Cané, Carles / Cea, Pilar / De Teresa, José María / Barth, Sven

    The journal of physical chemistry. C, Nanomaterials and interfaces

    2024  Volume 128, Issue 7, Page(s) 2967–2977

    Abstract: The investigation of precursor classes for the fabrication of nanostructures is of specific interest for maskless fabrication and direct nanoprinting. In this study, the differences in material composition depending on the employed process are ... ...

    Abstract The investigation of precursor classes for the fabrication of nanostructures is of specific interest for maskless fabrication and direct nanoprinting. In this study, the differences in material composition depending on the employed process are illustrated for focused-ion-beam- and focused-electron-beam-induced deposition (FIBID/FEBID) and compared to the thermal decomposition in chemical vapor deposition (CVD). This article reports on specific differences in the deposit composition and microstructure when the (H
    Language English
    Publishing date 2024-02-08
    Publishing country United States
    Document type Journal Article
    ISSN 1932-7447
    ISSN 1932-7447
    DOI 10.1021/acs.jpcc.3c08250
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: ZnO Structures with Surface Nanoscale Interfaces Formed by Au, Fe

    Tomić, Milena / Claros, Martha / Gràcia, Isabel / Figueras, Eduard / Cané, Carles / Vallejos, Stella

    Sensors (Basel, Switzerland)

    2021  Volume 21, Issue 13

    Abstract: Zinc oxide rod structures are synthetized and subsequently modified with Au, ... ...

    Abstract Zinc oxide rod structures are synthetized and subsequently modified with Au, Fe
    Language English
    Publishing date 2021-06-30
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2052857-7
    ISSN 1424-8220 ; 1424-8220
    ISSN (online) 1424-8220
    ISSN 1424-8220
    DOI 10.3390/s21134509
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Nanoscale Heterostructures Based on Fe2O3@WO3-x Nanoneedles and Their Direct Integration into Flexible Transducing Platforms for Toluene Sensing.

    Vallejos, Stella / Gràcia, Isabel / Figueras, Eduardo / Cané, Carles

    ACS applied materials & interfaces

    2015  Volume 7, Issue 33, Page(s) 18638–18649

    Abstract: Nanoscale heterostructures based on WO3-x nanoneedles functionalized with Fe2O3 nanoparticles are integrated directly into flexible polymer-based transducing platforms via aerosol-assisted chemical vapor deposition. Results demonstrate that the ... ...

    Abstract Nanoscale heterostructures based on WO3-x nanoneedles functionalized with Fe2O3 nanoparticles are integrated directly into flexible polymer-based transducing platforms via aerosol-assisted chemical vapor deposition. Results demonstrate that the incorporation of Fe2O3 nanoparticles at the surface of WO3-x nanoneedles enhances the electronic and sensing properties of WO3-x, providing a 6-fold increase in sensitivity to toluene and low cross-sensitivity to hydrogen and ethanol. These enhanced-sensing properties are comparable to those obtained via functionalization with precious metal (Pt) nanoparticles, which are commonly used to enhance sensor performance.
    Language English
    Publishing date 2015-08-26
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ISSN 1944-8252
    ISSN (online) 1944-8252
    DOI 10.1021/acsami.5b05081
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Cerium Oxide-Tungsten Oxide Core-Shell Nanowire-Based Microsensors Sensitive to Acetone.

    Tomić, Milena / Šetka, Milena / Chmela, Ondřej / Gràcia, Isabel / Figueras, Eduard / Cané, Carles / Vallejos, Stella

    Biosensors

    2018  Volume 8, Issue 4

    Abstract: Gas sensitive cerium oxide-tungsten oxide core-shell nanowires are synthesized and integrated directly into micromachined platforms via aerosol assisted chemical vapor deposition. Tests to various volatile organic compounds (acetone, ethanol, and toluene) ...

    Abstract Gas sensitive cerium oxide-tungsten oxide core-shell nanowires are synthesized and integrated directly into micromachined platforms via aerosol assisted chemical vapor deposition. Tests to various volatile organic compounds (acetone, ethanol, and toluene) involved in early disease diagnosis demonstrate enhanced sensitivity to acetone for the core-shell structures in contrast to the non-modified materials (i.e., only tungsten oxide or cerium oxide). This is attributed to the high density of oxygen vacancy defects at the shell, as well as the formation of heterojunctions at the core-shell interface, which provide the modified nanowires with 'extra' chemical and electronic sensitization as compared to the non-modified materials.
    MeSH term(s) Acetone/metabolism ; Cerium/chemistry ; Nanowires/chemistry ; Oxides/chemistry ; Tungsten/chemistry ; Volatile Organic Compounds/metabolism
    Chemical Substances Oxides ; Volatile Organic Compounds ; Acetone (1364PS73AF) ; Cerium (30K4522N6T) ; ceric oxide (619G5K328Y) ; tungsten oxide (940E10M08M) ; Tungsten (V9306CXO6G)
    Language English
    Publishing date 2018-11-23
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2662125-3
    ISSN 2079-6374 ; 2079-6374
    ISSN (online) 2079-6374
    ISSN 2079-6374
    DOI 10.3390/bios8040116
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article: Aerosol-assisted chemical vapor deposition of metal oxide structures: zinc oxide rods

    Vallejos, Stella / Pizúrová, Naděžda / Čechal, Jan / Gràcia, Isabel / Cané, Carles

    Journal of visualized experiments. 2017 Sept. 14, , no. 127

    2017  

    Abstract: Whilst columnar zinc oxide (ZnO) structures in the form of rods or wires have been synthesized previously by different liquid- or vapor-phase routes, their high cost production and/or incompatibility with microfabrication technologies, due to the use of ... ...

    Abstract Whilst columnar zinc oxide (ZnO) structures in the form of rods or wires have been synthesized previously by different liquid- or vapor-phase routes, their high cost production and/or incompatibility with microfabrication technologies, due to the use of pre-deposited catalyst-seeds and/or high processing temperatures exceeding 900 °C, represent a drawback for a widespread use of these methods. Here, however, we report the synthesis of ZnO rods via a non-catalyzed vapor-solid mechanism enabled by using an aerosol-assisted chemical vapor deposition (CVD) method at 400 °C with zinc chloride (ZnCl2) as the precursor and ethanol as the carrier solvent. This method provides both single-step formation of ZnO rods and the possibility of their direct integration with various substrate types, including silicon, silicon-based micromachined platforms, quartz, or high heat resistant polymers. This potentially facilitates the use of this method at a large-scale, due to its compatibility with state-of-the-art microfabrication processes for device manufacture. This report also describes the properties of these structures (e.g., morphology, crystalline phase, optical band gap, chemical composition, electrical resistance) and validates its gas sensing functionality towards carbon monoxide.
    Keywords carbon monoxide ; chemical composition ; electrical resistance ; ethanol ; heat tolerance ; manufacturing ; polymers ; quartz ; silicon ; solvents ; temperature ; vapors ; zinc chloride ; zinc oxide
    Language English
    Dates of publication 2017-0914
    Size p. e56127.
    Publishing place Journal of Visualized Experiments
    Document type Article
    ZDB-ID 2259946-0
    ISSN 1940-087X
    ISSN 1940-087X
    DOI 10.3791/56127
    Database NAL-Catalogue (AGRICOLA)

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  6. Article ; Online: Aerosol-assisted Chemical Vapor Deposition of Metal Oxide Structures: Zinc Oxide Rods.

    Vallejos, Stella / Pizu Rova, Nade Z da / Čechal, Jan / Gràcia, Isabel / Cané, Carles

    Journal of visualized experiments : JoVE

    2017  , Issue 127

    Abstract: Whilst columnar zinc oxide (ZnO) structures in the form of rods or wires have been synthesized previously by different liquid- or vapor-phase routes, their high cost production and/or incompatibility with microfabrication technologies, due to the use of ... ...

    Abstract Whilst columnar zinc oxide (ZnO) structures in the form of rods or wires have been synthesized previously by different liquid- or vapor-phase routes, their high cost production and/or incompatibility with microfabrication technologies, due to the use of pre-deposited catalyst-seeds and/or high processing temperatures exceeding 900 °C, represent a drawback for a widespread use of these methods. Here, however, we report the synthesis of ZnO rods via a non-catalyzed vapor-solid mechanism enabled by using an aerosol-assisted chemical vapor deposition (CVD) method at 400 °C with zinc chloride (ZnCl2) as the precursor and ethanol as the carrier solvent. This method provides both single-step formation of ZnO rods and the possibility of their direct integration with various substrate types, including silicon, silicon-based micromachined platforms, quartz, or high heat resistant polymers. This potentially facilitates the use of this method at a large-scale, due to its compatibility with state-of-the-art microfabrication processes for device manufacture. This report also describes the properties of these structures (e.g., morphology, crystalline phase, optical band gap, chemical composition, electrical resistance) and validates its gas sensing functionality towards carbon monoxide.
    Language English
    Publishing date 2017-09-14
    Publishing country United States
    Document type Journal Article
    ISSN 1940-087X
    ISSN (online) 1940-087X
    DOI 10.3791/56127
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: A Parts Per Billion (ppb) Sensor for NO

    Casals, Olga / Markiewicz, Nicolai / Fabrega, Cristian / Gràcia, Isabel / Cané, Carles / Wasisto, Hutomo Suryo / Waag, Andreas / Prades, Joan Daniel

    ACS sensors

    2019  Volume 4, Issue 4, Page(s) 822–826

    Abstract: A film of gas sensitive ZnO nanoparticles has been coupled with a low-power micro light plate (μLP) to achieve a ... ...

    Abstract A film of gas sensitive ZnO nanoparticles has been coupled with a low-power micro light plate (μLP) to achieve a NO
    MeSH term(s) Air Pollutants/analysis ; Electrochemical Techniques/instrumentation ; Electrochemical Techniques/methods ; Humidity ; Light ; Limit of Detection ; Metal Nanoparticles/chemistry ; Metal Nanoparticles/radiation effects ; Nitrogen Dioxide/analysis ; Zinc/chemistry ; Zinc/radiation effects
    Chemical Substances Air Pollutants ; Zinc (J41CSQ7QDS) ; Nitrogen Dioxide (S7G510RUBH)
    Language English
    Publishing date 2019-02-18
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ISSN 2379-3694
    ISSN (online) 2379-3694
    DOI 10.1021/acssensors.9b00150
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: Site-Specific Growth and in Situ Integration of Different Nanowire Material Networks on a Single Chip: Toward a Nanowire-Based Electronic Nose for Gas Detection.

    Hrachowina, Lukas / Domènech-Gil, Guillem / Pardo, Antonio / Seifner, Michael S / Gràcia, Isabel / Cané, Carles / Romano-Rodríguez, Albert / Barth, Sven

    ACS sensors

    2018  Volume 3, Issue 3, Page(s) 727–734

    Abstract: A new method for the site-selective synthesis of nanowires has been developed to enable material growth with defined morphology and, at the same time, different composition on the same chip surface. The chemical vapor deposition approach for the growth ... ...

    Abstract A new method for the site-selective synthesis of nanowires has been developed to enable material growth with defined morphology and, at the same time, different composition on the same chip surface. The chemical vapor deposition approach for the growth of these nanowire-based resistive devices using micromembranes can be easily modified and represents a simple, adjustable fabrication process for the direct integration of nanowire meshes in multifunctional devices. This proof-of-concept study includes the deposition of SnO
    MeSH term(s) Carbon Monoxide/analysis ; Electronic Nose ; Germanium/chemistry ; Nanowires/chemistry ; Oxides/chemistry ; Particle Size ; Surface Properties ; Tin Compounds/chemistry ; Tungsten/chemistry
    Chemical Substances Oxides ; Tin Compounds ; Germanium (00072J7XWS) ; Carbon Monoxide (7U1EE4V452) ; tungsten oxide (940E10M08M) ; stannic oxide (KM7N50LOS6) ; Tungsten (V9306CXO6G)
    Language English
    Publishing date 2018-03-06
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ISSN 2379-3694
    ISSN (online) 2379-3694
    DOI 10.1021/acssensors.8b00073
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: ZnO Rods with Exposed {100} Facets Grown via a Self-Catalyzed Vapor-Solid Mechanism and Their Photocatalytic and Gas Sensing Properties.

    Vallejos, Stella / Pizúrová, Naděžda / Gràcia, Isabel / Sotelo-Vazquez, Carlos / Čechal, Jan / Blackman, Chris / Parkin, Ivan / Cané, Carles

    ACS applied materials & interfaces

    2016  Volume 8, Issue 48, Page(s) 33335–33342

    Abstract: We present a new method for vapor deposition of columnar ZnO structures in the form of rods on various substrates without the need for substrate modification with catalyst seed particles and at relatively low temperatures compared to other vapor ... ...

    Abstract We present a new method for vapor deposition of columnar ZnO structures in the form of rods on various substrates without the need for substrate modification with catalyst seed particles and at relatively low temperatures compared to other vapor deposition methods. These structures are used for the photodegradation of stearic acid (C
    Language English
    Publishing date 2016-12-07
    Publishing country United States
    Document type Journal Article
    ISSN 1944-8252
    ISSN (online) 1944-8252
    DOI 10.1021/acsami.6b12992
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article: Finite-element analysis of a miniaturized ion mobility spectrometer for security applications

    Cumeras, Raquel / Gràcia, Isabel / Figueras, Eduard / Fonseca, Luis / Santander, Joaquin / Salleras, Marc / Calaza, Carlos / Sabaté, Neus / Cané, Carles

    Sensors & Actuators: B. Chemical. 2012 July 31, v. 170

    2012  

    Abstract: A miniaturized Planar Field Asymmetric Ion Mobility Spectrometer (P-FAIMS) has been simulated in N₂ at ambient pressure using COMSOL Multiphysics software. Micro-IMS is based on ion gas-phase separation due to the dependence of ion mobility with electric ...

    Abstract A miniaturized Planar Field Asymmetric Ion Mobility Spectrometer (P-FAIMS) has been simulated in N₂ at ambient pressure using COMSOL Multiphysics software. Micro-IMS is based on ion gas-phase separation due to the dependence of ion mobility with electric field. Ions are selected by a DC voltage characteristic of each kind of ion. The average kinetic behaviour of ions in high electric fields conditions is well known but not the chemical reactions and physical collisions related with. The aim of this work is the modelling of the average kinetic behaviour of different kind of ions in a P-FAIMS taking into account the main factors involved in their movement. Three different compounds, with high impact on security applications, have been studied: an explosive 2,4,6-trinitrotouluene (TNT−H)⁻, a volatile organic compound Ac₂H⁺ and a chemical warfare agent simulant DMMPH⁺ that emulates gas sarin. Displacement simulations along the P-FAIMS of theirs vapour phase ions have been done at different values of drift electric field amplitude to gas number density (E/N) ratio. Ions were selected between the ones present in the literature that covers the previous applications and the ones with more reliable experimental data of the main parameters involved in the definition of ions mobility needed for their analysis. Results show that simulations of ions behaviour in a P-FAIMS are possible with COMSOL Multiphysics software and that the time and intensity at which ions are detected are in good agreement with an experimental data in the literature.
    Keywords chemical reactions ; computer software ; electric field ; ions ; models ; nitrogen ; vapors ; volatile organic compounds
    Language English
    Dates of publication 2012-0731
    Size p. 13-20.
    Publishing place Elsevier B.V.
    Document type Article
    ZDB-ID 1021505-0
    ISSN 0925-4005
    ISSN 0925-4005
    DOI 10.1016/j.snb.2010.11.047
    Database NAL-Catalogue (AGRICOLA)

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