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Molybdenum oxide nanocolloids prepared by an external field-assisted laser ablation in water
Open accessAbstract
he synthesis of extremely stable molybdenum oxide nanocolloids by pulsed laser ablation was studied. This green technique ensures the formation of contaminant-free nanostructures and the absence of by-products. A focused picosecond pulsed laser beam was used to ablate a solid molybdenum target immersed in deionized water. Molybdenum oxide nearly spherical nanoparticles with dimensions within few nanometers (20-100 nm) are synthesized when the ablation processes were carried out, in water, at room temperature and 80°C. The application of an external electric field during the ablation process induces a nanostructures reorganization, as indicated by Scanning-Transmission Electron Microscopy images analysis. The ablation products were also characterized by some spectroscopic techniques: conventional UV-vis optical absorption, atomic absorption, dynamic light scattering, micro-Raman and X-ray photoelectron spectroscopies. Finally, NIH/3T3 mouse fibroblasts were used to evaluate cell viability by the sulforhodamine B assay
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D'Urso et al. prepared ZnO and ZnO/Au in the form of nanocolloids and nanorods by picosecond pulsed laser ablation in water; experimental results indicated gold decorated ZnO nanorods as high photodegradation efficiency catalysts towards methylene blue (MB) dye under UV light irradiation, as compared to bare ZnO.
“Recently, D’Urso et al. [259] prepared ZnO and ZnO/Au in the form of nanocolloids and nanorods by picosecond pulsed laser ablation in water. Experimental results indicated gold decorated ZnO nanorods as high photodegradation efficiency catalysts towards methylene blue (MB) dye, under UV light irradiation, as compared to bare ZnO.”
From Nanoparticles Engineering by Pulsed Laser Ablation in Liquids: Concepts and Applications (2020) · cites this paper as [259]
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Experimental — accuracy not yet measuredBoth Mo oxide nanocolloids induce metal redox and antioxidant properties that strongly depend on Mo-O surface chemical bonding configurations and NP morphology.
“Both nanocolloids induce metal redox and antioxidant properties which strongly depend on the Mo–O surface chemical bonding configurations and NP morphology.”
From Nanoparticles Engineering by Pulsed Laser Ablation in Liquids: Concepts and Applications (2020) · cites this paper as [140]
The Introduction (page not indicated) says Mo can participate in redox reactions and discusses antioxidant effects of metal oxide nanostructures generally. The Results and discussion describe different Mo–O bonding configurations and nanoparticle morphology, but do not show that both nanocolloids have antioxidant properties or that those properties strongly depend on bonding and morphology. The Conclusion describes an effect on cellular redox activity only as a potential application. (LLM, conf=0.87)
Experimental — accuracy not yet measuredTwo types of Mo oxide nanocolloids were prepared: one spherical with size less than 50 nm and dominant MoO2 surface chemical configuration, and another oblong where the oxygen-deficient MoO3 phase increases at the expense of MoO2.
“Two types of nanocolloids were prepared: one with a spherical shape, size less than 50 nm and a dominant MoO2 surface chemical configuration, and another with an oblong structure, where the oxygen deficient MoO3 phase increases at the expense of the MoO2 one.”
From Nanoparticles Engineering by Pulsed Laser Ablation in Liquids: Concepts and Applications (2020) · cites this paper as [140]
The Results and discussion section (page unavailable) reports spherical particles mixed with oblong ones under an electric field; its XPS results show dominant Mo⁴⁺ decreasing and Mo⁵⁺/Mo⁶⁺ increasing with the field. But the paper gives a spherical-particle size range of 20–100 nm, not less than 50 nm, and does not assign the measured chemical configurations separately to the spherical and oblong particles. (LLM, conf=0.88)
Experimental — accuracy not yet measuredSpadaro et al. observed a structural reorganisation in molybdenum oxide NPs due to the influence of an electric field.
“Spadaro et al. [161] examined the application of electric fields to producing molybdenum oxide NPs in water. They observed a structural reorganisation in the NPs due to this influence.”
Applying an external electric field (estimated 20 V/cm, Pt electrode distance 5 cm) during ablation was exploited to check for modifications of NP surface morphology and surface chemical bonding configurations.
“A molybdenum target was ablated in water and the effect of an external EF (the estimated electric field is 20 V/cm, the Pt electrode distance fixed at 5 cm) applied during the ablation process, has been exploited in order to check for modifications of the NP surface morphology and surface chemical bonding configurations.”
From Nanoparticles Engineering by Pulsed Laser Ablation in Liquids: Concepts and Applications (2020) · cites this paper as [140]
Selective tuning of Mo-O chemical bonding configurations and control of NP size distributions were achieved by varying water temperature and applying the external electric field.
“A selective tuning of Mo–O chemical bonding configurations and a suitable control of NP size distributions were achieved by varying the water temperature and by applying the external EF.”
From Nanoparticles Engineering by Pulsed Laser Ablation in Liquids: Concepts and Applications (2020) · cites this paper as [140]
Mo oxide nanocolloids were synthesized by Spadaro and Fazio et al. using a focused picosecond-pulsed laser beam (λ = 532 nm, repetition rate = 100 kHz, pulse width = 6-8 ps) ablating a molybdenum target in water.
“The EF role on Mo-based nanostructures is also shown by Spadaro and Fazio et al. [140,141] that deal with the synthesis of Mo oxide nanocolloids using a focused picosecond-pulsed laser beam (λ = 532 nm, repetition rate = 100 kHz, pulse width = 6–8 ps).”
From Nanoparticles Engineering by Pulsed Laser Ablation in Liquids: Concepts and Applications (2020) · cites this paper as [140]
Some of the most investigated and performing strategies to modify the absorption properties of ZnO and TiO2 are the introduction of atomic defects and the design of new nanocomposite materials resulting from the coupling of different semiconductor oxides, metals and carbon-based materials.
“As already mentioned, some of the most investigated and performing strategies to modify absorption properties of ZnO and TiO2 are the introduction of atomic defects and the design of new nanocomposite materials resulting by the coupling of different semiconductor oxides, metals and carbon-based materials [255,256,257,258,259,260].”
From Nanoparticles Engineering by Pulsed Laser Ablation in Liquids: Concepts and Applications (2020) · cites this paper as [259]
The Introduction describes synthesizing molybdenum oxide nanocolloids, and the Results and discussion mention a possible link between structural defects and an absorption band in those colloids. A search for ZnO, TiO2, defect-introduction strategies, and coupled nanocomposites found no passage addressing the claimed strategies for modifying ZnO or TiO2 absorption. (LLM, conf=0.76)
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Nanoparticles Engineering by Pulsed Laser Ablation in Liquids: Concepts and Applications
Fazio, E., Gökce, B., De Giacomo, A., Meneghetti, M., Compagnini, G., Tommasini, M., Waag, F., Lucotti, A., Zanchi, C. G., Ossi, P. M., et al. (2020) · Nanomaterials · doi:10.3390/nano10112317 · Cited by 346
“[140,141] that deal with the synthesis of Mo oxide nanocolloids using a focused picosecond-pulsed laser beam (λ = 532 nm, repetition rate = 100 kHz, pulse width = 6–8 ps).”
Self-citationSubhan, A., Mourad, A.-H. I., & Al-Douri, Y. (2022) · Nanomaterials · doi:10.3390/nano12132144 · Cited by 95
“[161] examined the application of electric fields to producing molybdenum oxide NPs in water.”
Background
Metadata
- Authors
- Spadaro, S., Bonsignore, M., Fazio, E., Cimino, F., Speciale, A., Trombetta, D., Barreca, F., Saija, A., & Neri, F.
- Affiliations
- University of Messina (IT)
- ORCID
- Venue
- EPJ Web of Conferences
- Publisher
- EDP Sciences
- Published
- 2018
- Volume
- 167
- Pages
- 04009
- ISSN
- 2100-014X (ISSN-L)
- OpenAlex
- W2783024970
- Cited by
- 9
- References
- 0
- Citations by year
- 2025: 1 · 2023: 1 · 2022: 1 · 2021: 1 · 2020: 2 · 2019: 2 · 2018: 1
- FWCI
- 3.29
- Type
- conference paper
- Language
- en
- Open access
- diamond
- doi.org
- Licence
- Locations
- EPJ Web of Conferences (publishedVersion, cc-by)
- Springer Link (Chiba Institute of Technology) (submittedVersion)
- DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
- Topics
- Physical Sciences › Materials Science › Materials Chemistry › Laser-Ablation Synthesis of Nanoparticles
- Physical Sciences › Materials Science › Materials Chemistry › Advanced Nanomaterials in Catalysis
- Physical Sciences › Materials Science › Materials Chemistry › Nanoparticles: synthesis and applications
- Keywords
- molybdenum oxide, nanocolloids, pulsed laser ablation in liquid, external electric field, nanoparticle synthesis, green synthesis, room-temperature synthesis, cytotoxicity, NIH3T3 cells, cell viability
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