Iron and iron oxide nanoparticles obtained by ultra-short laser ablation in liquid

Bonis, Angela De; Lovaglio, Teresa; Galasso, A.; Santagata, A.; Teghil, R.

doi:10.1016/j.apsusc.2015.06.145

Cited by 47 publications

(31 citation statements)

References 30 publications

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“…[26] Various reports have been published on the production of FeNPs by LAL. [37][38][39][40][41][42][43] Hu et al reported the formation of Fe 2 O 3 cores coated by diamond-like carbons by the LAL of an iron plate in hexane (800 nm, 90 fs). [37] Amendola et al investigated that various FeNPs such as iron carbide, iron oxide and iron with carbon shells were formed from an iron plate by varying the organic solvent (1064 nm, 9 ns).…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Bare Iron Nanoparticles from Ferrocene Hexane Solution by Femtosecond Laser Pulses

et al. 2018

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Iron-based nanoparticles (FeNPs) have unique and attractive properties such as superparamagnetism, biocompatibility, and catalytic activity. Although the synthesis of precious metal NPs from a metal in liquid and/or metal salt solution by a pulsed laser has been investigated, comparably little effort has been devoted to examine the production of FeNPs. Here we report the synthesis of carbon-shell free spherical NPs of iron oxide (magnetite) from ferrocene hexane solution by femtosecond near infrared laser pulses. Nanosecond UV laser pulses are used to compare the evolution of the particle size distribution as a function of laser irradiation time. The size of NPs remains constant even for extended exposure to femtosecond laser pulses, whereas it grows with exposure to nanosecond laser pulses. The primary particles are generated by photochemical reactions regardless of pulse duration; however, the fragmentation of NPs by successive femtosecond laser pulses regulates the particle size.

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Section: Introductionmentioning

confidence: 99%

Synthesis of Bare Iron Nanoparticles from Ferrocene Hexane Solution by Femtosecond Laser Pulses

et al. 2018

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“…The observed nano‐droplets on top of the ripples can be attributed to the formed molten layer on the Fe surface during the ablation. This molten layer rapidly solidifies and is re‐deposited back on to the target material in the form of particles . The average ripple periodicities are estimated by considering more than three SEM images in each case, and the calculated periodicities are 143 ± 24 nm, 120 ± 16 nm, and 152 ± 24 nm for FeDNS1, FeDNS2, and FeDNS3, respectively.…”

Section: Resultsmentioning

confidence: 99%

“…This molten layer rapidly solidifies and is re-deposited back on to the target material in the form of particles. [49,50] The average ripple periodicities are estimated by considering more than three SEM images in each case, and the calculated periodicities are 143 ± 24 nm, 120 ± 16 nm, and 152 ± 24 nm for FeDNS1, FeDNS2, and FeDNS3, respectively. These are calculated using the ImageJ software available commercially.…”

Section: Resultsmentioning

confidence: 99%

Surface‐enhanced Raman scattering studies of gold‐coated ripple‐like nanostructures on iron substrate achieved by femtosecond laser irradiation in water

Byram

Moram

Soma

2019

J Raman Spectroscopy

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During the past several years, numerous efforts have been accomplished on designing efficient surface‐enhanced Raman scattering (SERS) substrates with high sensitivity, good reproducibility, and recyclable nature. However, it still remains a significant challenge to realize all these qualities in a single substrate. We have fabricated ripple‐like nanostructures (NSs) on Iron (Fe) substrate using femtosecond (fs) laser irradiation of Fe target in distilled water. These ripple‐like structures had periodicities in the range of ~90–190 nm, which was confirmed from the analysis of field emission scanning electron microscope (FESEM) data. We subsequently deposited a thin layer of gold on these ripple‐like Fe NSs using thermal evaporation. Later, these coated NSs were effectively utilized as SERS substrates for methylene blue (MB) detection and were found to be sensitive evident from the data obtained at a very low concentration of 500pM. Furthermore, we observed that the SERS signal variations on the substrate were <11.2% indicating the reproducible nature of these substrates. Additionally, we demonstrate that these substrates can be reused (we establish this for three times consecutively) by detecting malachite green (MG) and an explosive molecule (picric acid, PA) followed by the mixture compound (Rhodamine 6G+MB) through employment of simple cleaning procedures. The detected molecular concentrations in terms of masses were found to be 3.2 pg, 36.5 pg, and 23 ng for MB (for a concentration of 500pM), MG (for a concentration of 5nM), and PA (for a concentration of 5μM), respectively. Furthermore, these Fe NSs exhibited superior batch‐to‐batch reproducibility with a relative standard deviation (RSD) value of ~l4%. The proposed method of fabricating ripple structures as SERS platforms are highly feasible, reliable, and have great potential for on‐site detection of several analyte molecules with an easily transportable Raman spectrometer.

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“…[10] investigated the magneticp roperties of particles generated from ap ure iron plate in water and ethanol, respectively.B oth found that the NPs possessed ah igh saturation magnetization. [16] For fs-PLAL, De Bonis et al [17] investigated the particlec ompositiono fN Ps generated in water and acetone but withouta ni nvestigation of the magnetic properties. Other groupsd emonstrated the influenceo fd ifferents olvents on the particlec omposition without investigating the magnetic properties.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Magnetic Nanoparticles by Ultrashort Pulsed Laser Ablation of Iron in Different Liquids

et al. 2017

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Magnetic nanoparticles were generated by ultrashort pulsed laser ablation of an iron target in water, methanol, ethanol, acetone and toluene. The relationship between ablation rate, liquid properties and the physical and chemical properties of the nanoparticles was studied. Composition, morphology and magnetic properties were investigated by TEM, XPS and vibrating-sample (VSM) and SQUID magnetometry. The properties of the generated nanoparticle ensembles reflected the influence of the liquid environment on the particle formation process. For example, the composition was strongly dependent on the carbon to oxygen ratio within the molecules of the liquid. In contrast to short pulsed laser ablation in liquids, the nanoparticles generated by ultrashort pulses had a higher level of polycrystallinity.

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Iron and iron oxide nanoparticles obtained by ultra-short laser ablation in liquid

Cited by 47 publications

References 30 publications

Synthesis of Bare Iron Nanoparticles from Ferrocene Hexane Solution by Femtosecond Laser Pulses

Synthesis of Bare Iron Nanoparticles from Ferrocene Hexane Solution by Femtosecond Laser Pulses

Surface‐enhanced Raman scattering studies of gold‐coated ripple‐like nanostructures on iron substrate achieved by femtosecond laser irradiation in water

Synthesis of Magnetic Nanoparticles by Ultrashort Pulsed Laser Ablation of Iron in Different Liquids

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