Publication detail

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.

Original Title

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

Type

journal article in Web of Science

Language

English

Original Abstract

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.

Keywords

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

Authors

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

Released

5. 12. 2023

Publisher

AMER CHEMICAL SOC

Location

WASHINGTON

ISBN

1528-7505

Periodical

Crystal Growth and Design

Year of study

24

Number

1

State

United States of America

Pages from

378

Pages to

390

Pages count

13

URL

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

Full text in the Digital Library

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"
}