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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" }