Detail publikace

W18O49 Nanowhiskers Decorating SiO2 Nanofibers: Lessons from In Situ SEM/TEM Growth to Large Scale Synthesis and Fundamental Structural Understanding

KUNDRÁT, V. BUKVIŠOVÁ, K. NOVÁK, L. PRŮCHA, L. HOUBEN, L. ZÁLEŠÁK, J. VUKUSIC, A. HOLEC, D. TENNE, R. PINKAS, J.

Originální název

W18O49 Nanowhiskers Decorating SiO2 Nanofibers: Lessons from In Situ SEM/TEM Growth to Large Scale Synthesis and Fundamental Structural Understanding

Typ

článek v časopise ve Web of Science, Jimp

Jazyk

angličtina

Originální abstrakt

Tungsten suboxide W18O49 nanowhiskers are a material of great interest due to their potential high-end applications in electronics, near-infrared light shielding, catalysis, and gas sensing. The present study introduces three main approaches for the fundamental understanding of W18O49 nanowhisker growth and structure. First, W18O49 nanowhiskers were grown from gamma-WO3/a-SiO2 nanofibers in situ in a scanning electron microscope (SEM) utilizing a specially designed microreactor (mu Reactor). It was found that irradiation by the electron beam slows the growth kinetics of the W18O49 nanowhisker, markedly. Following this, an in situ TEM study led to some new fundamental understanding of the growth mode of the crystal shear planes in the W18O49 nanowhisker and the formation of a domain (bundle) structure. High-resolution scanning transmission electron microscopy analysis of a cross-sectioned W18O49 nanowhisker revealed the well-documented pentagonal Magn & eacute;li columns and hexagonal channel characteristics for this phase. Furthermore, a highly crystalline and oriented domain structure and previously unreported mixed structural arrangement of tungsten oxide polyhedrons were analyzed. The tungsten oxide phases found in the cross section of the W18O49 nanowhisker were analyzed by nanodiffraction and electron energy loss spectroscopy (EELS), which were discussed and compared in light of theoretical calculations based on the density functional theory method. Finally, the knowledge gained from the in situ SEM and TEM experiments was valorized in developing a multigram synthesis of W18O49/a-SiO2 urchin-like nanofibers in a flow reactor.

Klíčová slova

NEAR-INFRARED ABSORPTION; TUNGSTEN-OXIDE; ELECTROSPUN NANOFIBERS; WS2 NANOTUBES; NANOWIRES; LITHIUM; PHOTOLUMINESCENCE; NANOSTRUCTURES; PERFORMANCE; EFFICIENCY

Autoři

KUNDRÁT, V.; BUKVIŠOVÁ, K.; NOVÁK, L.; PRŮCHA, L.; HOUBEN, L.; ZÁLEŠÁK, J.; VUKUSIC, A.; HOLEC, D.; TENNE, R.; PINKAS, J.

Vydáno

5. 12. 2023

Nakladatel

AMER CHEMICAL SOC

Místo

WASHINGTON

ISSN

1528-7505

Periodikum

Crystal Growth and Design

Ročník

24

Číslo

1

Stát

Spojené státy americké

Strany od

378

Strany do

390

Strany počet

13

URL

https://pubs.acs.org/doi/10.1021/acs.cgd.3c01094

Plný text v Digitální knihovně

http://hdl.handle.net/11012/245193

BibTex

@article{BUT187406,
  author="Vojtěch {Kundrát} and Kristýna {Bukvišová} and Libor {Novák} and Lukáš {Průcha} and Lothar {Houben} and Jakub {Zálešák} and Antonio {Vukusic} and David {Holec} and Reshef {Tenne} and Jiří {Pinkas}",
  title="W18O49 Nanowhiskers Decorating SiO2 Nanofibers: Lessons from In Situ SEM/TEM Growth to Large Scale Synthesis and Fundamental Structural Understanding",
  journal="Crystal Growth and Design",
  year="2023",
  volume="24",
  number="1",
  pages="378--390",
  doi="10.1021/acs.cgd.3c01094",
  issn="1528-7505",
  url="https://pubs.acs.org/doi/10.1021/acs.cgd.3c01094"
}