Detection of Fake Alcoholic Beverages Using Electrolyte-Free Nanogap Electrochemical Cells
| Autor: | Sekharipuram R. Narayanan, Tse-Hsien Ou, Dan Fang, Yifei Wang, Wei Wu |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
0303 health sciences
Electrolysis Ethanol Materials science Inorganic chemistry 02 engineering and technology Electrolyte 021001 nanoscience & nanotechnology law.invention Electrochemical cell 03 medical and health sciences chemistry.chemical_compound chemistry law Electrode General Materials Science Methanol 0210 nano-technology Volume concentration Ion transporter 030304 developmental biology |
| Zdroj: | ACS applied materialsinterfaces. 11(6) |
| ISSN: | 1944-8252 |
| Popis: | Because of the similarity of odor, appearance, and chemical structure of methanol and ethanol, measuring the low concentration of methanol in an alcoholic beverage is difficult to perform in a quick, quantitative, and repeatable fashion. However, it is important for people to monitor the content of methanol in a liquor because a high amount of methanol absorbed will result in blindness, coma, and death. In response to this need, we have developed electrolyte-free methanol electrolysis and ethanol electrolysis based on the nanogap electrochemical cells for the methanol and ethanol sensing. Upon applying a voltage, a high electric field across the nanogap cell enhances the solution ionization and the ion transport rate. Moreover, the nanoscale distance between the electrodes provides a shorter path for electrolysis to easily occur. The nanogap electrochemical cells not only make the direct electrolyte-free organic solvent electrolysis possible but also enhance the sensitivity of the chemical of interest in low-concentration solutions without the influence of the added electrolyte. The nanogap electrochemical cells have been demonstrated having high sensitivity to detect 0.15% methanol volume concentration in deionized water solutions without adding any electrolyte, and its ability for the fake alcoholic beverages' detection has successfully demonstrated. |
| Databáze: | OpenAIRE |
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