Fabrication of PbS nanoparticle coated amorphous carbon nanotubes: Structural, thermal and field emission properties

Journal Article · Sat Oct 15 00:00:00 EDT 2011 · Materials Research Bulletin

DOI:https://doi.org/10.1016/J.MATERRESBULL.2011.06.006· OSTI ID:22210064

Jana, S. ^[1]; Banerjee, D.; Jha, A. ^[2]

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1. Thin Films and Nanoscience Laboratory, Department of Physics, Jadavpur University, Kolkata 700 032 (India)
2. School of Material Science and Nanotechnology, Jadavpur University, Kolkata 700 032 (India)

Graphical abstract: Simple chemical synthesis of PbS nanoparticle coated amorphous carbon nanotubes have shown better thermal stability and enhanced electron field emission properties. Highlights: {yields} PbS nanocrystals coated amorphous carbon nanotubes have been synthesized through a simple chemical route at low temperature. {yields} The composite is thermally more stable than amorphous CNTs. {yields} Composite have shown excellent cold cathode field emission property. -- Abstract: A simple chemical route for the synthesis of PbS nanoparticle coated amorphous carbon nanotubes (aCNTs) was described. The nanocomposite was prepared from an aqueous suspension of acid functionalized aCNTs, lead acetate (PbAc), and thiourea (TU) at room temperature. The phase formation and composition of the samples were characterized by X-ray diffraction and energy dispersive analysis of X-ray studies. The Fourier transformed infrared spectra analysis revealed the attachment of PbS nanoparticles on the acid functionalized aCNT surfaces. Morphology of the samples was analyzed with a field emission scanning electron microscope. UV-Vis study also confirmed the attachment of PbS nanoparticles on the walls of aCNTs. Thermal gravimetric analysis showed that the PbS coated aCNTs are more thermally stable than functionalized aCNTs. The PbS coated aCNTs showed enhanced field emission properties with a turn-on field 3.34 V {mu}m{sup -1} and the result is comparable to that of pure crystalline CNTs.

• OSTI ID: 22210064
• Journal Information: Materials Research Bulletin, Vol. 46, Issue 10; Other Information: Copyright (c) 2011 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 0025-5408
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
36 MATERIALS SCIENCE
77 NANOSCIENCE AND NANOTECHNOLOGY
CARBON NANOTUBES
COMPARATIVE EVALUATIONS
FIELD EMISSION
FOURIER TRANSFORMATION
LEAD SULFIDES
MICROSTRUCTURE
SCANNING ELECTRON MICROSCOPY
STABILITY
SURFACES
SYNTHESIS
THERMAL GRAVIMETRIC ANALYSIS
THIOUREA
X RADIATION
X-RAY DIFFRACTION