Facile synthesis of nanocomposites of CNF-Sn and C-Sn microspheres: Prospective field emitter

We report synthesis of Carbon nanofibers (CNFs) and hybrid nanocomposites namely, CNF-Sn and C-Sn microspheres using simple electrospinning technique, followed by annealing in controlled atmosphere. The as-prepared materials were characterized using X-raydiffraction (XRD), Field emission scanning el...

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Bibliographic Details
Published in:Journal of alloys and compounds 2022-06, Vol.907, p.164318, Article 164318
Main Authors: Badadhe, Satish S., Yadav, Poonam, Suryawanshi, Sachin, More, Mahendra A.
Format: Article
Language:English
Subjects:
Base pressure
Carbon fibers
Carbon nanofiber
Chemical properties
Electron microscopy
Electrospinning
Emitters
Field emission
Field emission microscopy
High aspect ratio
Microscopy
Microspheres
Nanocomposite
Nanocomposites
Nanofibers
Nanostructure
Photoelectrons
Raman spectroscopy
Spectrum analysis
Synthesis
Tin
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Summary:We report synthesis of Carbon nanofibers (CNFs) and hybrid nanocomposites namely, CNF-Sn and C-Sn microspheres using simple electrospinning technique, followed by annealing in controlled atmosphere. The as-prepared materials were characterized using X-raydiffraction (XRD), Field emission scanning electron microscopy (FESEM), Transmission electron microscopy (TEM), Ultra-violet photoelectron spectroscopy (UPS), and Raman spectroscopy to reveal their physico-chemical properties. As carbon family members are potential materials for field emission (FE) based applications, owing to their high aspect ratio FE characteristics of the synthesized materials were explored at base pressure of 1 × 10−8 mbar. Interestingly, the hybrid nanocomposite CNF-Sn and C-Sn emitters showed improved FE behavior (with the turn-on field of 3.4 and 1.36 V/μm, respectively) in contrast to the pristine CNFs emitter (turn-on field of 5.4 V/μm). Furthermore, the maximum emission current density is substantially enhanced, 7.75 and 4.6 mA/cm2 for CNF-Sn and C-Sn emitters, respectively. The improvement in the FE behavior of nanocomposite emitters is attributed to the combined effect of morphology and modulation of electronic properties at the interface of nanocomposites. The results confirm that FE characteristics of pristine nanostructures can be greatly improved upon formation of their nanocomposites and this approach can be extended to other nanostructures for improving their multi-functionalities.
ISSN:0925-8388
1873-4669
DOI:10.1016/j.jallcom.2022.164318