Diatom frustules decorated with zinc oxide nanoparticles for enhanced optical properties
Open accessAbstract
Zinc oxide (ZnO) nanoparticles were synthesized on diatomite (DE) surface by a low temperature sol gel technique, starting from zinc acetate dihydrate (Zn(CH 3 COO) 2 · 2H 2 O) solution in water/ethyl alcohol, in presence of triethanolamine (TEA) with functions of Zn 2+ chelating agent, catalyst and mediator of nanoparticle growth on DE surface. Microstructural features were investigated by field emission scanning electron microscopy and x-ray diffraction. ZnO crystalline nanoparticles, well distributed both on the surface and into the porous architecture of diatomite, were obtained just after the synthesis carried out at 80 °C without the need of calcination treatments. The optical properties of ZnO/DE hybrid powders were measured for the first time by means of photoacoustic spectroscopy (PAS). A new method to retrieve both the optical absorption and scattering coefficients from PAS is here discussed for powder aggregates. The fingerprint of the zinc oxide nanoparticles has been highlighted in the Mie scattering resonance in the UV–Vis range, and in the enhancement of the optical absorption with respect to diatomite.
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Very limited data are available on photoacoustic studies of single-cell organisms (prokaryotes and eukaryotes) containing light-absorbing chromophores.
“To the best of our knowledge, very limited data [[8], [9], [10]] are available on the photoacoustic studies of single-cell organisms—both prokaryotes (e.g. cyanobacteria) and eukaryotes (e.g. diatoms)—which contain light-absorbing chromophores such as chlorophyll or carotenoids.”
From Photoacoustic and fluorescence lifetime imaging of diatoms (2020) · cites this paper as [8]
The Introduction (page not provided) identifies diatoms as photosynthetic microorganisms but says the material studied was diatomite, a fossil mixture of frustules. Section 3 (page not provided) reports photoacoustic spectroscopy of diatomite powders, supporting the diatom-related example. The paper does not establish that such studies are scarce or report photoacoustic measurements of intact, chromophore-containing single cells. (LLM, conf=0.84)
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Cited by
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Photoacoustic spectroscopy investigation of zinc oxide/diatom frustules hybrid powders
Lamastra, F. R., Grilli, M. L., Leahu, G., Belardini, A., Li Voti, R., Sibilia, C., Salvatori, D., Cacciotti, I., & Nanni, F. (2018) · International Journal of Thermophysics · doi:10.1007/s10765-018-2428-6 · Cited by 35 · see citing works
Self-citationPhotoacoustic and fluorescence lifetime imaging of diatoms
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- Authors
- Lamastra, F. R., Grilli, M. L., Leahu, G., Belardini, A., Voti, R. L., Sibilia, C., Salvatori, D., Cacciotti, I., & Nanni, F.
- Affiliations
- National Interuniversity Consortium of Materials Science and Technology (IT)
- National Agency for New Technologies, Energy and Sustainable Economic Development (IT)
- Sapienza University of Rome (IT)
- University of Rome Tor Vergata (IT)
- University Niccolò Cusano (IT)
- Corresponding author
- Lamastra, F R
- Voti, R Li
- Venue
- Nanotechnology
- Publisher
- IOP Publishing
- Published
- 2017-08-21
- Volume
- 28
- Issue
- 37
- Pages
- 375704
- ISSN
- 0957-4484 (ISSN-L)
- 1361-6528
- OpenAlex
- W2726141822
- Cited by
- 33
- References
- 57
- Citations by year
- 2026: 1 · 2025: 1 · 2024: 2 · 2023: 6 · 2022: 4 · 2021: 4 · 2020: 6 · 2019: 4 · 2018: 4 · 2017: 1
- FWCI
- 1.73
- Type
- journal article
- Language
- en
- Open access
- green
- hdl.handle.net
- Licence
- Locations
- Nanotechnology (publishedVersion)
- PubMed (publishedVersion)
- IRIS Research product catalog (Sapienza University of Rome) (submittedVersion, other-oa)
- Cineca Institutional Research Information System (Tor Vergata University) (submittedVersion)
- ENEA Open Archive (National Agency for New Technologies, Energy and Sustainable Economic Development) (submittedVersion)
- Topics
- Physical Sciences › Materials Science › Materials Chemistry › ZnO doping and properties
- Physical Sciences › Materials Science › Materials Chemistry › Nanoparticles: synthesis and applications
- Physical Sciences › Materials Science › Biomaterials › Diatoms and Algae Research
- Keywords
- zinc oxide nanoparticles, diatomite, diatom frustules, sol-gel synthesis, triethanolamine, optical absorption, light scattering, photoacoustic spectroscopy, porous media
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