Pulsed laser melting in liquid for crystalline spherical submicrometer particle fabrication– Mechanism, process control, and applications

Ishikawa, Yoshie; Tsuji, Takeshi; Sakaki, Shota; Koshizaki, Naoto

doi:10.1016/j.pmatsci.2022.101004

Cited by 24 publications

(17 citation statements)

References 286 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The evolution of the viscosity is expected to last for a relatively shorter period in the online addition process and then quickly reach the steady status as long as the PET masterbatch is sufficiently melted and mixed. In fact, viscosity in the dispersing environment has been reported as an important factor to consider when the size dispersion of nanoparticles needs controlling. − Yoshihara et al suggest that the rapid aggregation process can be inhibited by high environmental viscosity, thereby inhibiting the increase of particle size . Similarly, the results by Ishikawa et al and Nair et al also support this conclusion.…”

Section: Resultsmentioning

confidence: 92%

“…In fact, viscosity in the dispersing environment has been reported as an important factor to consider when the size dispersion of nanoparticles needs controlling. − Yoshihara et al suggest that the rapid aggregation process can be inhibited by high environmental viscosity, thereby inhibiting the increase of particle size . Similarly, the results by Ishikawa et al and Nair et al also support this conclusion. These reports as well as our findings suggest that the viscosity of the polymer melts is a key factor which we should pay attention to when designing polymer nanocomposite fabrication systems.…”

Section: Resultsmentioning

confidence: 92%

See 1 more Smart Citation

Size Dispersion of the Filler Particles and Its Consequences on the Light-Extinction Properties of TiO₂/PET Nanocomposite Fibers

et al. 2023

View full text Add to dashboard Cite

Titanium dioxide (TiO2) nanoparticles have been extensively used to modify the optical properties of various types of materials. In particular, they have been intensively loaded onto polymer fibers to quench the light reflection. In situ polymerization and online addition are two common strategies for fabricating TiO2-loaded polymer nanocomposite fibers. The former does not require separate preparation of masterbatches as the latter does and therefore has its advantages in terms of decreasing the fabrication steps and economic costs. Moreover, it has been found that in situ-polymerized TiO2-loaded polymer nanocomposite fibers (e.g., TiO2/poly(ethylene terephthalate) fibers) usually have enhanced light-extinction properties over those prepared by the online addition process. Intuitively, there should be a difference in the filler particle dispersion for the two fabrication processes. This hypothesis has not yet been tackled due to the technical difficulty in acquiring the three-dimensional (3D) filler morphology inside the fiber matrix. In this paper, we report a study using the powerful focused ion beam-scanning electron microscopy (FIB-SEM) with a resolution of 20 nm to directly acquire the 3D microstructure of TiO2/poly(ethylene terephthalate) nanocomposite (TiO2/PET) fibers. This microscopy technique allows us to characterize the particle size statistics and the dispersion inside TiO2/PET fibers. We have found that the particle size of TiO2 inside the fiber matrix can be well modeled by Weibull statistics. Surprisingly, we find that TiO2 nanoparticles form more significant agglomeration in the in situ-polymerized TiO2/PET fibers. This observation is contrary to our common understanding of the two fabrication processes. Namely, slightly altering the particle dispersion with increased TiO2 filler size helps improve the light-extinction properties. The slightly increased filler size may have altered the Mie scattering between the nanoparticles and the incident visible light, leading to enhanced light-extinction properties of in situ-polymerized TiO2/PET nanocomposite fibers.

show abstract

Section: Resultsmentioning

confidence: 92%

Section: Resultsmentioning

confidence: 92%

Size Dispersion of the Filler Particles and Its Consequences on the Light-Extinction Properties of TiO₂/PET Nanocomposite Fibers

et al. 2023

View full text Add to dashboard Cite

show abstract

“…In contrast, the bottom–up process of growing particles from atoms or molecules, such as the chemical reduction method, produces uniform-size particles through uniform nucleation from the raw material solution and reaction time control. , However, as the particle size increases, stable crystal planes tend to grow anisotropically, making it difficult to synthesize spheres with diameters larger than the submicron . Thus, the synthesis of crystalline material spheres, particularly those with smooth surfaces of the order of microns, is technically difficult and limited to a few methods, such as the laser melting method. ,− Furthermore, it remains challenging to develop a method for directly synthesizing uniformly sized particles with a coefficient of variation (CV), which is the ratio of the standard deviation to the mean, of less than 5%.…”

Section: Introductionmentioning

confidence: 99%

Extremely Monodispersed Micrometer-Scale Spherical Particle Synthesis of Ag Inside a Microdroplet Vaporizing in Plasma

Nitta,

Hato,

Muneoka

et al. 2024

ACS Omega

View full text Add to dashboard Cite

Spherical Ag particles have received considerable attention because of their unique properties as well as their applications in various fields. In the present study, the synthesis of micrometer-scale spherical Ag particles with an extremely narrow size distribution is demonstrated using a simple capacitively coupled atmospheric-pressure plasma reactor with an inkjet head. Droplets of a Ag nitrate aqueous solution are ejected from the inkjet head to synthesize Ag particles. The gaseous temperature in the reactor is adjusted such that Ag can be melted with a negligibly small vapor pressure. These particles exhibit a spherical shape with a smooth surface. The mean diameter of the particles is 0.91 ± 0.013 μm with a small coefficient of variation of 1.5%, the smallest value ever reported for Ag particles of less than 1 μm. The grain sizes of the particles are larger than 100 nm, as expected from the broadening of the X-ray diffraction peaks. The excellent monodispersity of the particles synthesized by this method may expand the applications with micrometer-scale spheres such as ball spacer, microsized ball bearing, and inks for printed electronics.

show abstract

“…The laser ablation in liquid (LAL) strategy provided a promising avenue for the synthesis of SAA electrodes. [9] The laser energy was absorbed and converted to heat energy, and a high temperature within the femtoliter focal volume was generated on the target material. [10] With the features of local high temperature by laser, the precursors of metal ions or compounds on the surface of target material were thermally decomposed at a high rate of speed, [11] and the highly active plasma would interact with solvent or ions to synthesize nanomaterials.…”

Section: Introductionmentioning

confidence: 99%

Laser Synthesis of PtMo Single‐Atom Alloy Electrode for Ultralow Voltage Hydrogen Generation

Yuan,

Jiang,

et al. 2023

Advanced Materials

View full text Add to dashboard Cite

Maximizing atom‐utilization efficiency and high current stability are crucial for the platinum (Pt)‐based electrocatalysts for hydrogen evolution reaction (HER). Herein, the Pt single‐atom anchored molybdenum (Mo) foil (Pt‐SA/Mo‐L) as a single‐atom alloy electrode is synthesized by the laser ablation strategy. The local thermal effect with fast rising–cooling rate of laser can achieve the single‐atom distribution of the precious metals (e.g., Pt, Rh, Ir, and Ru) onto the Mo foil. The synthesized self‐standing Pt‐SA/Mo‐L electrode exhibits splendid catalytic activity (31 mV at 10 mA cm−2) and high‐current‐density stability (≈850 mA cm−2 for 50 h) for HER in acidic media. The strong coordination of Pt‐Mo bonding in Pt‐SA/Mo‐L is critical for the efficient and stable HER. In addition, the ultralow electrolytic voltage of 0.598 V to afford the current density of 50 mA cm−2 is realized by utilization of the anodic molybdenum oxidation instead of the oxygen evolution reaction (OER). Here a universal synthetic strategy of single‐atom alloys (PtMo, RhMo, IrMo, and RuMo) as self‐standing electrodes is provided for ultralow voltage and membrane‐free hydrogen production.

show abstract

Pulsed laser melting in liquid for crystalline spherical submicrometer particle fabrication– Mechanism, process control, and applications

Cited by 24 publications

References 286 publications

Size Dispersion of the Filler Particles and Its Consequences on the Light-Extinction Properties of TiO₂/PET Nanocomposite Fibers

Size Dispersion of the Filler Particles and Its Consequences on the Light-Extinction Properties of TiO₂/PET Nanocomposite Fibers

Extremely Monodispersed Micrometer-Scale Spherical Particle Synthesis of Ag Inside a Microdroplet Vaporizing in Plasma

Laser Synthesis of PtMo Single‐Atom Alloy Electrode for Ultralow Voltage Hydrogen Generation

Contact Info

Product

Resources

About

Pulsed laser melting in liquid for crystalline spherical submicrometer particle fabrication– Mechanism, process control, and applications

Cited by 24 publications

References 286 publications

Size Dispersion of the Filler Particles and Its Consequences on the Light-Extinction Properties of TiO2/PET Nanocomposite Fibers

Size Dispersion of the Filler Particles and Its Consequences on the Light-Extinction Properties of TiO2/PET Nanocomposite Fibers

Extremely Monodispersed Micrometer-Scale Spherical Particle Synthesis of Ag Inside a Microdroplet Vaporizing in Plasma

Laser Synthesis of PtMo Single‐Atom Alloy Electrode for Ultralow Voltage Hydrogen Generation

Contact Info

Product

Resources

About

Size Dispersion of the Filler Particles and Its Consequences on the Light-Extinction Properties of TiO₂/PET Nanocomposite Fibers

Size Dispersion of the Filler Particles and Its Consequences on the Light-Extinction Properties of TiO₂/PET Nanocomposite Fibers