Thermal Plasma Assisted Synthesis of Nanocrystalline Silicon—A Review

Bhoraskar, S. V.; Tank, Chiti M.; Mathe, V. L.

doi:10.1166/nnl.2012.1319

Cited by 6 publications

(8 citation statements)

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“…The particles, so formed, fly away from the plasma zone and get collected over the inner walls of the spherical dome of the chamber. Such a process of nucleation and growth induced by thermal plasma is represented in our earlier publication [26]. The particles are collected from the inner walls of the dome and are characterized for understanding there structural and morphological properties without any further treatment.…”

Section: Methodsmentioning

confidence: 99%

Micro-structural analysis of NiFe2O4 nanoparticles synthesized by thermal plasma route and its suitability for BSA adsorption

Bhosale

Kanhe

Bhoraskar

et al. 2015

J Mater Sci: Mater Med

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The paper presents the experimental studies pertaining to the adsorption of bovine serum albumin (BSA) on the nanoparticles of nickel ferrite (NiFe2O4) with a view of correlating the adsorption properties to their microstructure and zeta potentials. Physical properties of two kinds of nickel ferrites, one synthesized by thermal plasma route and the other by chemical co-precipitation method, are compared. Maximum adsorption (231.57 μg/mg) of BSA onto nickel ferrite nanoparticles, at body temperature (37 °C) was observed at pH-value of 5.58 for the thermal plasma synthesized particles showing its higher adsorption capacity than those synthesized by wet chemical means (178.71 μg/mg). Under the same physical conditions the value of zeta potential, obtained for the former, was higher than that of the latter over a wide range of pH values (3.64-9.66). This is attributed to the differences in the specific surface energies of the two kinds of nanoparticles arising from the degree of crystallinity. The paper presents the experimental evidence for the single crystalline nature of the individual nanoparticles, with mean size of 32 nm, for the thermal plasma synthesized particles as evidenced from the high resolution transmission electron microscopy and electron diffraction analysis. The measurements also reveal the poor crystalline morphology in the chemically prepared particles (mean size of 28 nm) although the X-ray diffraction patterns are not much different. The atomic force microscopy images confirm that the surfaces of plasma synthesized nanoparticles possesses higher surface roughness than that of chemically synthesized one. Presence of adsorbed protein was confirmed by vibrational spectroscopy. The Langmuir adsorption model is found to fit into the experimental data better than the Freundlich adsorption model.

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Section: Methodsmentioning

confidence: 99%

Micro-structural analysis of NiFe2O4 nanoparticles synthesized by thermal plasma route and its suitability for BSA adsorption

Bhosale

Kanhe

Bhoraskar

et al. 2015

J Mater Sci: Mater Med

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“…Details about the synthesis and characterization of SiNTs are discussed in our earlier publication. 3,4,26 However, for the sake of continuity of the manuscript, microstructural characterization carried out by transmission electron microscope is included. The average work function measurements were carried out for the SiNT samples in a separate set up using the retarding field diode geometry employing low energy electrons.…”

Section: Experimental Techniquesmentioning

confidence: 99%

“…Si and C belong to the same group of the periodic table, but Si prefers sp 3 hybridization over sp 2 contrary to carbon promoting three dimensional growth. 3,4 Hence, 1D Si mainly forms rod or wire like nanostructures instead of nanotubular structure as that of carbon nanotubes. Even then silicon nanotubes (SiNTs) remain an interesting structure due to their incredible properties.…”

Section: Introductionmentioning

confidence: 99%

“…However, it is also observed that it is possible to synthesize SiNTs under high temperature and pressure conditions and there are a few reports of synthesis of SiNTs using different techniques. 4,24,25 DC-arc thermal plasma assisted technique is one such route. A very steep temperature gradient, existing in case of thermal plasma assisted synthesis, governs the formation of nanostructures.…”

Section: Introductionmentioning

confidence: 99%

“…Here, we report the field emission study from SiNTs synthesized by arc plasma method. Prior to FE measurements, the nanotubes were characterized 3 using transmission electron microscopy (TEM), nanobeam electron energy loss spectroscopy, nanobeam electron diffraction, Raman spectroscopy, 4 and scanning tunneling microscopy. 26 …”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Arc plasma synthesized Si nanotubes: A promising low turn on field emission source

Joshi

Tank

Kamble

et al. 2015

Journal of Vacuum Science &Amp; Technology B, Nanotechnology and Microelectronics: Materials, Processing, Measurement, and Phen

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Here, the authors report the field emission investigations of silicon nanotubes (SiNTs) synthesized by vapor phase condensation method in DC arc plasma reactor. The SiNTs have diameters in the range of 10–15 nm and length of a few 100 nm. A maximum current density of 4.2 mA/cm2 has been attained. The turn on field, defined for obtaining a current density of 10 μA/cm2, is found to be 1.9 V/μm. The specimen exhibits a good emission current stability at 1 μA over a period of 3 h. The field enhancement factor, β, is estimated to be ∼5534. The current stability is quantified in terms of standard deviation and its magnitude has been measured to be only 9.7% with respect to the average value.

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Antimicrobial activity of silica coated silicon nano-tubes (SCSNT) and silica coated silicon nano-particles (SCSNP) synthesized by gas phase condensation

Tank

Raman

Karan

et al. 2013

J Mater Sci: Mater Med

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Silica-coated, silicon nanotubes (SCSNTs) and silica-coated, silicon nanoparticles (SCSNPs) have been synthesized by catalyst-free single-step gas phase condensation using the arc plasma process. Transmission electron microscopy and scanning tunneling microscopy showed that SCSNTs exhibited a wall thickness of less than 1 nm, with an average diameter of 14 nm and a length of several 100 nm. Both nano-structures had a high specific surface area. The present study has demonstrated cheaper, resistance-free and effective antibacterial activity in silica-coated silicon nano-structures, each for two Gram-positive and Gram-negative bacteria. The minimum inhibitory concentration (MIC) was estimated, using the optical densitometric technique, and by determining colony-forming units. The MIC was found to range in the order of micrograms, which is comparable to the reported MIC of metal oxides for these bacteria. SCSNTs were found to be more effective in limiting the growth of multidrug-resistant Staphylococcus aureus over SCSNPs at 10 μg/ml (IC 50 = 100 μg/ml).

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Thermal Plasma Assisted Synthesis of Nanocrystalline Silicon—A Review

Cited by 6 publications

References 0 publications

Micro-structural analysis of NiFe2O4 nanoparticles synthesized by thermal plasma route and its suitability for BSA adsorption

Micro-structural analysis of NiFe2O4 nanoparticles synthesized by thermal plasma route and its suitability for BSA adsorption

Arc plasma synthesized Si nanotubes: A promising low turn on field emission source

Antimicrobial activity of silica coated silicon nano-tubes (SCSNT) and silica coated silicon nano-particles (SCSNP) synthesized by gas phase condensation

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