Rhodamine 6G and Nile Red Containing Porous Films with CdTe Quantum Dots for Highly Sensitive Detection of Acetone and Ammonia in the Air
| Authors | Ya.Р. Lazorenko1,2, V.P. Mitsaі2, S.O. Mamilov2, V.O. Sokolov2, V.O. Golub2 |
| Affiliations |
1G.V. Kurdyumov Institute for Metal Physics of the NAS of Ukraine, 03142 Kyiv, Ukraine 2V.G. Baryakhtar Institute of Magnetism of the NAS of Ukraine, 03142 Kyiv, Ukraine |
| Е-mail | golub@imag.kiev.ua |
| Issue | Volume 18, Year 2026, Number 4 |
| Dates | Received 20 April 2026; revised manuscript received 18 August 2026; published online 21 August 2026 |
| Citation | Ya.Р. Lazorenko, V.P. Mitsaі, S.O. Mamilov, et al., J. Nano- Electron. Phys. 18 No 4, 04030 (2026) |
| DOI | https://doi.org/10.21272/jnep.18(4).04030 |
| PACS Number(s) | 07.07.Df, 33.50.Dq, 78.20. – e, 78.67.Hc, 81.07.Ta, 87.64. – t |
| Keywords | Sensor (28) , Fluorescent dyes, Rhodamine 6G, Nile red, Acetone, Ammonia (2) , Fluorescence, Quantum dots (3) . |
| Annotation |
Detecting molecules at low concentrations in multicomponent gas environment is a difficult task. Although various sensors are currently under research and development, they do not always meet the requirements of high sensitivity, selectivity, operation at room temperature, and low cost. One promising approach to achieving this is fluorescent film sensors. The objective of this study was to investigate the optical properties and fluorescence-based sensor responses of porous films doped with rhodamine 6G or Nile red, or their complexes with CdTe quantum dots. The film matrices consisted of polyvinyl alcohol, Aerosil (fumed silica), or ethylene vinyl acetate with silica gel. Quantum dots were introduced to enhance the fluorescence signal via non-radiative Förster resonance energy transfer. Optical absorption and fluorescence spectra of films in the visible region have been acquired. The decrease in fluorescence intensity determined the analyte content. Sensor responses to low concentrations of ammonia or acetone (5 ppm) have been detected. The highest sensitivities to acetone and ammonia were demonstrated by Aerosil doped with rhodamine 6G and polyvinyl alcohol doped with Nile red and 2.9 nm CdTe quantum dots, respectively. Such high sensitivity was observed at room temperature. Based on the experimental results and the unique properties of the materials, it was concluded that these films could be used as sensitive sensor elements for non-invasive disease diagnosis by detecting biomarker concentrations in exhaled air, or for environmental monitoring. |
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List of References |
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