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- Title
Visual colorimetric detection of tin(II) and nitrite using a molybdenum oxide nanomaterial-based three-input logic gate.
- Authors
Du, Jiayan; Huang, Wei; Deng, Yuequan; Zhao, Mengxin; He, Yi
- Abstract
We report a molybdenum oxide (MoO3) nanomaterial-based three-input logic gate that uses Sn2+, NO2−, and H+ ions as inputs. Under acidic conditions, Sn2+ is able to reduce MoO3 nanosheets, generating oxygen-vacancy-rich MoO3−x nanomaterials along with strong localized surface plasmon resonance (LSPR) and an intense blue solution as the output signal. When NO2− is introduced, the redox reaction between the MoO3 nanosheets and Sn2+ is strongly inhibited because the NO2− consumes both H+ and Sn2+. The three-input logic gate was employed for the visual colorimetric detection of Sn2+ and NO2− under different input states. The colorimetric assay’s limit of detection for Sn2+ and the lowest concentration of NO2− detectable by the assay were found to be 27.5 nM and 0.1 μM, respectively. The assay permits the visual detection of Sn2+ and NO2− down to concentrations as low as 2 μM and 25 μM, respectively. The applicability of the logic-gate-based colorimetric assay was demonstrated by using it to detect Sn2+ and NO2− in several water sources.
- Subjects
MOLYBDENUM oxides; NANOSTRUCTURED materials; HYDROGEN ions; SURFACE plasmon resonance; NITROGEN dioxide
- Publication
Analytical & Bioanalytical Chemistry, 2018, Vol 410, Issue 18, p4519
- ISSN
1618-2642
- Publication type
Article
- DOI
10.1007/s00216-018-1109-4