2-D organization of silica nanoparticles on gold surfaces: CO2 marker detection and storage
| Autor: | Eva Mateo-Martí, Eduardo José Cueto Díaz, María Pilar Valles González, Santos Gálvez-Martínez, Ma Carmen Torquemada Vico |
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| Přispěvatelé: | Unidad de Excelencia Científica María de Maeztu Centro de Astrobiología del Instituto Nacional de Técnica Aeroespacial y CSIC, MDM-2017-0737, Torquemada, M. C. [0000-0002-0438-3120], Mateo Martí, E. [0000-0003-4709-4676], Agencia Estatal de Investigación (AEI), Comunidad de Madrid, E. C. D. Postdoctoral Fellowship from CAM, Unidad de Excelencia María de Maeztu Centro de Astrobiología Instituto Nacional de Técnica Aeroespacial y CSIC, Spanish Government |
| Rok vydání: | 2020 |
| Předmět: |
Martian
Materials science Sensors General Chemical Engineering Nanoparticle 02 engineering and technology General Chemistry Growth Carbon Dioxide 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Atmosphere Physisorption Chemical engineering Covalent bond Chemisorption Nanosensor Wafer 0210 nano-technology Deposition Photoluminescence |
| Zdroj: | DIGITAL.INTA Repositorio Digital del Instituto Nacional de Técnica Aeroespacial instname Digital.CSIC. Repositorio Institucional del CSIC Instituto Nacional de Técnica Aeroespacial (INTA) |
| Popis: | A single layer of silica nanoparticles with an average size of ∼200 nm was deposited over the surface of pristine gold wafers, aided by (3-mercaptopropyl)trimethoxysilane. The nanoparticle immobilization was driven by covalent bonding rather than a self-assembly process, leading to a cluster-assembled material which has COsensing features. Here, we show how this device can be used for COphysisorption and chemisorption. We analyse the device, both spectroscopically and morphologically, before and after exposure to an atmosphere of 7 mbar of CO, inside a planetary atmospheres and surfaces simulation chamber, (PASC) mimiking Martian atmospheric conditions. Our studies demonstrate that these clusters are suitable for COdetection and storage, under well controlled experimental Martian conditions. Their high sensitivity at a very low concentration of CO, 12.4 ppm, makes them ideal candidates in the nanosensor field. With funding from the Spanish government through the "María de Maeztu Unit of Excellence" accreditation (MDM-2017-0737) |
| Databáze: | OpenAIRE |
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