Investigations on the Influence of Liquid-Assisted Laser Ablation of NiTi Rotating Target to Improve the Formation Efficiency of Spherical Alloyed NiTi Nanoparticles

Patra, Nivedita; Katoch, Akash; Gagrani, Rohit; Singh, Vipul; Palani, I. A.

doi:10.1007/s11665-017-2886-1

Cited by 8 publications

(9 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The condition of the surface of shape memory alloys is very important given that the relief state of the martensitic phase plays a major role in manifesting the shape memory effect [28]. We observed a pleated relief, characteristic for the martensitic variants, with an accurate arrangement of these and similar spatial dimensions with those resulted through SEM electronic microscopy.…”

Section: Surface Analysessupporting

confidence: 65%

See 1 more Smart Citation

In-Situ Plasma Monitoring during the Pulsed Laser Deposition of Ni60Ti40 Thin Films

et al. 2020

View full text Add to dashboard Cite

The properties of pulsed laser deposited of Ni60Ti40 shape memory thin films generated in various deposition conditions were investigated. In-situ plasma monitoring was implemented by means of space- and time-resolved optical emission spectroscopy, and ICCD fast camera imaging. Structural and chemical analyses were performed on the thin films using SEM, AFM, EDS, and XRD equipment. The deposition parameters influence on the chemical composition of the thin films was investigated. The peeled layer presented on DSC a solid-state transformation in a different transformation domain compared to the target properties. A fractal model was used to describe the dynamics of laser produced plasma through various non-differentiable functionalities. Through hydrodynamic type regimes, space-time homographic transformations were correlated with the global dynamics of the ablation plasmas. Spatial simultaneity of homographic transformation through a special SL(2R) invariance implies the description of plasma dynamics through Riccati type equations, establishing correlations with the optical emission spectroscopy measurements.

show abstract

Section: Surface Analysessupporting

confidence: 65%

“…where r is a real constant specific to this particular solution. Using the relation (28), solution (32) in real terms becomes:…”

Section: The Dynamics Of Transient Plasmas Generated By Laser Ablatiomentioning

confidence: 99%

In-Situ Plasma Monitoring during the Pulsed Laser Deposition of Ni60Ti40 Thin Films

et al. 2020

View full text Add to dashboard Cite

show abstract

“…Hence, the interaction of the cavitation bubble and consecutive laser pulses causes a reduction of the overall nanoparticle productivity and must be avoided. This can be achieved by relative displacement between the target surface and the beam, either by very fast target surface agitation via rotational target movement (Nandini et al 2017;Resano-Garcia et al 2016) or by beam guidance methods via sufficiently fast laser beam scanning (Wagener et al 2010), (Zhang et al 2017). Higher average laser powers are realized today either by increasing the laser pulse energy or the pulse repetition rate.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of gold, platinum, and gold-platinum alloy nanoparticle colloids with high-power megahertz-repetition-rate lasers: the importance of the beam guidance method

et al. 2021

View full text Add to dashboard Cite

Nanoparticles of noble metals and their alloys are of particular interest for biomedicine and catalysis applications. The method of laser ablation of bulk metals in liquids gives facile access to such particles as high-purity colloids and is already used in industrial research. However, the method still lacks sufficient productivity for industrial implementation into series production. The use of innovative laser technology may help to further disseminate this colloid synthesis method in the near future. Ultrashort-pulsed lasers with high powers and megahertz-repetition-rates became available recently, but place high demands on the accurate optical laser pulse delivery on the target. Full lateral pulse separation is necessary to avoid a reduction of nanoparticle productivity due to pulse shielding. In this study, we compare flexible but rather slow galvanometer scanning with much faster but more expensive polygon-wheel scanning in their performance in the production of colloidal nanoparticles by laser ablation in liquid. Both beam guidance technologies are applied in the laser ablation of gold, platinum, and a gold-rich platinum alloy in micromolar saline water. We found that the dimensions of the scan pattern are crucial. A threshold pattern length exists, at which one scan technology becomes more productive than the other one. In addition, a much lower productivity was found for the ablation of gold compared to that of platinum. Alloying gold with only 10 at.% of platinum improved the productivity nearly to the level of platinum, reaching 8.3 g/h.

show abstract

“…As can be seen, spherical nanoparticles are present, which are typically observed in nanomaterials obtained by laser treatment. 31,34 These nanospheres have average sizes of 7, 25, and 110 nm, as shown Figure 2b (inset). Their composition was qualitatively studied by EDS mapping in the STEM imaging mode, and Figure 2c shows a bright-field STEM image (BF-STEM) of the analyzed region.…”

Section: Resultsmentioning

confidence: 92%

“…28−30 Irradiation of a mixture of single-element micro/nanomaterials may lead to their alloying and the fabrication of multielement structures, making this a top-down, efficient, versatile, surfactant-free, and low-cost approach for obtaining bimetallic NAs. 31−35 Thus, fabrication of NAs by fs laser irradiation can provide a green synthesis solution, in which no organic solvents or chemical reducing agents are needed. 36,37 However, to the best of our knowledge, there are no studies in the literature reporting the fabrication of Ag–Bi NAs by fs laser irradiation.…”

Section: Introductionmentioning

confidence: 99%

From Complex Inorganic Oxides to Ag–Bi Nanoalloy: Synthesis by Femtosecond Laser Irradiation

et al. 2018

View full text Add to dashboard Cite

Bimetallic nanoalloys with a wide variety of structures and compositions have been fabricated through many diverse techniques. Generally, various steps and chemicals are involved in their fabrication. In this study, the synthesis of Ag–Bi nanoalloys by femtosecond laser irradiation of an inorganic oxide Ag 2 WO 4 /NaBiO 3 target without any chemicals like reducing agents or solvent is presented. The interaction between these materials and the ultrashort pulse of light allows the migration of Ag and Bi atoms from the crystal lattice to the particles surfaces and then to the plasma plume, where the reduction of the positively charged Ag and Bi species in their respective metallic species takes place. Subsequently, the controlled nucleation and growth of the Ag–Bi alloyed nanoparticles occurs in situ during the irradiation process in air. Although at the bulk level, these elements are highly immiscible, it was experimentally demonstrated that at nanoscale, the Ag–Bi nanoalloy can assume a randomly mixed structure with up to 6 ± 1 atom % of Bi solubilized into the face-centered cubic structure of Ag. Furthermore, the Ag–Bi binary system possesses high antibacterial activity against Staphylococcus aureus (methicillin-resistant and methicilin-susceptible), which is interesting for potential antimicrobial applications, consequently increasing their range of applicability. The present results provide potential insights into the structures formed by the Ag–Bi systems at the nanoscale and reveal a new processing method where complex inorganic oxides can be used as precursors for the controlled synthesis of alloyed bimetallic nanoparticles.

show abstract

Investigations on the Influence of Liquid-Assisted Laser Ablation of NiTi Rotating Target to Improve the Formation Efficiency of Spherical Alloyed NiTi Nanoparticles

Cited by 8 publications

References 37 publications

In-Situ Plasma Monitoring during the Pulsed Laser Deposition of Ni60Ti40 Thin Films

In-Situ Plasma Monitoring during the Pulsed Laser Deposition of Ni60Ti40 Thin Films

Synthesis of gold, platinum, and gold-platinum alloy nanoparticle colloids with high-power megahertz-repetition-rate lasers: the importance of the beam guidance method

From Complex Inorganic Oxides to Ag–Bi Nanoalloy: Synthesis by Femtosecond Laser Irradiation

Contact Info

Product

Resources

About