Transmission Kikuchi diffraction: The impact of the signal-to-noise ratio

Tokarski, Tomasz; Nolze, Gert; Winkelmann, Aimo; Rychłowski, Łukasz; Bała, P.; Cios, Grzegorz

doi:10.1016/j.ultramic.2021.113372

Cited by 7 publications

(1 citation statement)

References 37 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For TKD, the samples were prepared on a carbon mesh grid using the same steps as described above for the STEM measurements. The mesh grid was mounted at −60°o n custom-built TKD holder, as described in Tokarski et al (2021) [51]. The stage was tilted by 40°to result in sample tilt of −20°which is typical for off-axis TKD measurements.…”

Section: Structure Analysis Via Transmission Kikuchi Diffraction (Tkd)mentioning

confidence: 99%

Influence of polyvinylpyrrolidone (PVP) in the synthesis of luminescent NaYF₄:Yb,Er upconversion nanoparticles

Birch

Bruckbauer

Gajewska

et al. 2023

Methods Appl. Fluoresc.

Self Cite

View full text Add to dashboard Cite

Polyvinylpyrrolidone (PVP) can be used to produce upconversion nanoparticles (UCNPs) in an advantageous manner, i.e. at modest temperatures in open-to-air conditions with simple hotplate and flask apparatus. However, the influence of PVP parameters on the formation of UCNPs has not been previously investigated. In this exploratory study, we establish that PVP molecular weight and relative amount of PVP can greatly influence the morphology and diameter of NaYF4:Yb,Er UCNPs produced via the PVP-assisted route. At nominal amounts of PVP, varying the molecular weight of PVP in synthesis between 10,000 g/mol (PVP10), 40,000 g/mol (PVP40), and 55,000 g/mol (PVP55), had minimal effect on UCNP morphology, whereas reducing the quantity of PVP10 and PVP40 in the reaction to 10% of the nominal amount resulted in two notable effects: (1) the generation of a greater range of UCNP diameters and (2) the production of an unexpected sub-population of rhombus-shaped UCNPs. Bulk and individual nanoparticle analysis indicates that all UCNP morphologies were cubic (α-phase) crystal structure and consisted of NaYF4:Yb,Er. Optical emission properties exhibited only modest green and red luminescence emission ratio when PVP parameters were varied. However, separately produced PVP40 NaYF4:Yb,Tm UCNPs exhibited a much more intense and dual-band blue /red emission. This exploratory work demonstrates that tailoring PVP content in synthesis of UCNPs can greatly alter morphology of UCNPs produced and should be carefully considered in experimental design. However, the underlying mechanisms of action of the role PVP plays in this synthesis remain unclear. Ultimately, significant further work is still required to fully elucidate the relevant chemistry to achieve full control of PVP-UCNP synthesis.

show abstract

Section: Structure Analysis Via Transmission Kikuchi Diffraction (Tkd)mentioning

confidence: 99%

Influence of polyvinylpyrrolidone (PVP) in the synthesis of luminescent NaYF₄:Yb,Er upconversion nanoparticles

Birch

Bruckbauer

Gajewska

et al. 2023

Methods Appl. Fluoresc.

Self Cite

View full text Add to dashboard Cite

show abstract

Measuring elastic strains and orientation gradients by scanning electron microscopy: Conventional and emerging methods

Ernould

Beausir

Fundenberger

et al. 2022

Advances in Imaging and Electron Physics

View full text Add to dashboard Cite

On the crystallography of the Mg–Si–Al nitride nuclei and of the graphite/nitride interface in spheroidal graphite iron

Alonso

Tokarski

Stefanescu

et al. 2022

Carbon

View full text Add to dashboard Cite

Transmission Kikuchi diffraction: The impact of the signal-to-noise ratio

Cited by 7 publications

References 37 publications

Influence of polyvinylpyrrolidone (PVP) in the synthesis of luminescent NaYF₄:Yb,Er upconversion nanoparticles

Influence of polyvinylpyrrolidone (PVP) in the synthesis of luminescent NaYF₄:Yb,Er upconversion nanoparticles

Measuring elastic strains and orientation gradients by scanning electron microscopy: Conventional and emerging methods

On the crystallography of the Mg–Si–Al nitride nuclei and of the graphite/nitride interface in spheroidal graphite iron

Contact Info

Product

Resources

About

Transmission Kikuchi diffraction: The impact of the signal-to-noise ratio

Cited by 7 publications

References 37 publications

Influence of polyvinylpyrrolidone (PVP) in the synthesis of luminescent NaYF4:Yb,Er upconversion nanoparticles

Influence of polyvinylpyrrolidone (PVP) in the synthesis of luminescent NaYF4:Yb,Er upconversion nanoparticles

Measuring elastic strains and orientation gradients by scanning electron microscopy: Conventional and emerging methods

On the crystallography of the Mg–Si–Al nitride nuclei and of the graphite/nitride interface in spheroidal graphite iron

Contact Info

Product

Resources

About

Influence of polyvinylpyrrolidone (PVP) in the synthesis of luminescent NaYF₄:Yb,Er upconversion nanoparticles

Influence of polyvinylpyrrolidone (PVP) in the synthesis of luminescent NaYF₄:Yb,Er upconversion nanoparticles