Cu(OH)2 and CuO Nanorod Synthesis on Piezoresistive Cantilevers for the Selective Detection of Nitrogen Dioxide
| Autor: | Karine Bonnot, Mathias Holz, Manuel Hofer, Ahmad Ahmad, Laurent Schlur, Denis Spitzer |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Copper oxide
Materials science Cantilever Annealing (metallurgy) piezoresistive sensors nanostructured sensors CuO/Cu(OH)2 nanorods NO2 detection selective detection explosives detection chemistry.chemical_element Pentaerythritol tetranitrate 02 engineering and technology lcsh:Chemical technology 010402 general chemistry 01 natural sciences Biochemistry Article Analytical Chemistry chemistry.chemical_compound lcsh:TP1-1185 Electrical and Electronic Engineering Instrumentation 021001 nanoscience & nanotechnology Copper Piezoresistive effect Atomic and Molecular Physics and Optics 0104 chemical sciences chemistry Chemical bond Chemical engineering Nanorod 0210 nano-technology |
| Zdroj: | Sensors; Volume 18; Issue 4; Pages: 1108 Sensors (Basel, Switzerland) Sensors, Vol 18, Iss 4, p 1108 (2018) |
| ISSN: | 1424-8220 |
| Popis: | Self-controlled active oscillating microcantilevers with a piezoresistive readout are very promising sensitive sensors, despite their small surface. In order to increase this surface and consequently their sensitivity, we nanostructured them with copper hydroxide (Cu(OH)2) or with copper oxide (CuO) nanorods. The Cu(OH)2 rods were grown, on a homogeneous copper layer previously evaporated on the top of the cantilever. The CuO nanorods were further obtained by the annealing of the copper hydroxide nanostructures. Then, these copper based nanorods were used to detect several molecules vapors. The results showed no chemical affinity (no formation of a chemical bond) between the CuO cantilevers and the tested molecules. The cantilever with Cu(OH)2 nanorods is selective to nitrogen dioxide (NO2) in presence of humidity. Indeed, among all the tested analytes, copper hydroxide has only an affinity with NO2. Despite the absence of affinity, the cantilevers could even so condensate explosives (1,3,5-trinitro-1,3,5-triazinane (RDX) and pentaerythritol tetranitrate (PETN) on their surface when the cantilever temperature was lower than the explosives source, allowing their detection. We proved that in condensation conditions, the cantilever surface material has no importance and that the nanostructuration is useless because a raw silicon cantilever detects as well as the nanostructured ones. |
| Databáze: | OpenAIRE |
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