Influence of Poly(vinylpyrrolidone) concentration on properties of silver nanoparticles manufactured by modified thermal treatment method
Very narrow and pure silver nanoparticles were synthesized by modified thermal treatment method via oxygen and nitrogen flow in succession. The structural and optical properties of the calcined silver nanoparticles at 600°C with diverse Poly(vinylpyrrolidone) concentrations varied from 2% to 4% were...
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| description | Very narrow and pure silver nanoparticles were synthesized by modified thermal treatment method via oxygen and nitrogen flow in succession. The structural and optical properties of the calcined silver nanoparticles at 600°C with diverse Poly(vinylpyrrolidone) concentrations varied from 2% to 4% were studied by means of different techniques. Fourier transform infrared spectroscopy was used to monitor the production of pure Ag nanoparticles at a given Poly(vinylpyrrolidone) concentration. The X-ray powder diffraction spectra are evidence for the transformation of the amorphous sample at 30°C to the cubic crystalline nanostructures at the calcination temperatures for all Poly(vinylpyrrolidone) concentrations. The transmission electron microscopy images showed the creation of spherical silver nanoparticles with the average particle size decreased by increasing Poly(vinylpyrrolidone) concentrations from 4.61 nm at 2% to 2.49 nm at 4% Poly(vinylpyrrolidone). The optical properties were investigated by means of UV-vis absorption spectrophotometer, which showed an increase in the conduction band of Ag nanoparticles with increasing Poly(vinylpyrrolidone) concentrations from 2.83 eV at 2% Poly(vinylpyrrolidone) to 2.94 eV at 4% Poly(vinylpyrrolidone) due to decreasing particle size. This was due to less attraction between conduction electrons and metal ions for smaller particle size corresponding to fewer atoms that made up the metal nanoparticles. |
| doi_str_mv | 10.1371/journal.pone.0186094 |
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The structural and optical properties of the calcined silver nanoparticles at 600°C with diverse Poly(vinylpyrrolidone) concentrations varied from 2% to 4% were studied by means of different techniques. Fourier transform infrared spectroscopy was used to monitor the production of pure Ag nanoparticles at a given Poly(vinylpyrrolidone) concentration. The X-ray powder diffraction spectra are evidence for the transformation of the amorphous sample at 30°C to the cubic crystalline nanostructures at the calcination temperatures for all Poly(vinylpyrrolidone) concentrations. The transmission electron microscopy images showed the creation of spherical silver nanoparticles with the average particle size decreased by increasing Poly(vinylpyrrolidone) concentrations from 4.61 nm at 2% to 2.49 nm at 4% Poly(vinylpyrrolidone). The optical properties were investigated by means of UV-vis absorption spectrophotometer, which showed an increase in the conduction band of Ag nanoparticles with increasing Poly(vinylpyrrolidone) concentrations from 2.83 eV at 2% Poly(vinylpyrrolidone) to 2.94 eV at 4% Poly(vinylpyrrolidone) due to decreasing particle size. This was due to less attraction between conduction electrons and metal ions for smaller particle size corresponding to fewer atoms that made up the metal nanoparticles.</description><identifier>ISSN: 1932-6203</identifier><identifier>EISSN: 1932-6203</identifier><identifier>DOI: 10.1371/journal.pone.0186094</identifier><identifier>PMID: 29045414</identifier><language>eng</language><publisher>United States: Public Library of Science</publisher><subject>Conduction ; Conduction bands ; Conduction electrons ; Electron microscopy ; Engineering and Technology ; Fourier transforms ; Gold ; Heat treatment ; Image transmission ; Infrared spectroscopy ; Metal Nanoparticles - chemistry ; Metal Nanoparticles - ultrastructure ; Metals ; Methods ; Nanocomposites ; Nanomaterials ; Nanoparticles ; Nanotechnology ; Nanotechnology - methods ; Optical Phenomena ; Optical properties ; Oxygen ; Particle Size ; Physical Sciences ; Physics ; Povidone - pharmacology ; Powders ; Radiation therapy ; Research and Analysis Methods ; Roasting ; Silver ; Silver - pharmacology ; Spectrophotometers ; Spectrophotometry, Ultraviolet ; Spectroscopy, Fourier Transform Infrared ; Temperature ; Transformation ; Transmission electron microscopy ; Ultraviolet absorption ; Vinyl compounds ; Vinylpyrrolidone ; Waste treatment ; X ray powder diffraction ; X-Ray Diffraction</subject><ispartof>PloS one, 2017-10, Vol.12 (10), p.e0186094</ispartof><rights>COPYRIGHT 2017 Public Library of Science</rights><rights>2017 Gharibshahi et al. This is an open access article distributed under the terms of the Creative Commons Attribution License (the “License”), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. 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The structural and optical properties of the calcined silver nanoparticles at 600°C with diverse Poly(vinylpyrrolidone) concentrations varied from 2% to 4% were studied by means of different techniques. Fourier transform infrared spectroscopy was used to monitor the production of pure Ag nanoparticles at a given Poly(vinylpyrrolidone) concentration. The X-ray powder diffraction spectra are evidence for the transformation of the amorphous sample at 30°C to the cubic crystalline nanostructures at the calcination temperatures for all Poly(vinylpyrrolidone) concentrations. The transmission electron microscopy images showed the creation of spherical silver nanoparticles with the average particle size decreased by increasing Poly(vinylpyrrolidone) concentrations from 4.61 nm at 2% to 2.49 nm at 4% Poly(vinylpyrrolidone). The optical properties were investigated by means of UV-vis absorption spectrophotometer, which showed an increase in the conduction band of Ag nanoparticles with increasing Poly(vinylpyrrolidone) concentrations from 2.83 eV at 2% Poly(vinylpyrrolidone) to 2.94 eV at 4% Poly(vinylpyrrolidone) due to decreasing particle size. This was due to less attraction between conduction electrons and metal ions for smaller particle size corresponding to fewer atoms that made up the metal nanoparticles.</description><subject>Conduction</subject><subject>Conduction bands</subject><subject>Conduction electrons</subject><subject>Electron microscopy</subject><subject>Engineering and Technology</subject><subject>Fourier transforms</subject><subject>Gold</subject><subject>Heat treatment</subject><subject>Image transmission</subject><subject>Infrared spectroscopy</subject><subject>Metal Nanoparticles - chemistry</subject><subject>Metal Nanoparticles - ultrastructure</subject><subject>Metals</subject><subject>Methods</subject><subject>Nanocomposites</subject><subject>Nanomaterials</subject><subject>Nanoparticles</subject><subject>Nanotechnology</subject><subject>Nanotechnology - methods</subject><subject>Optical Phenomena</subject><subject>Optical properties</subject><subject>Oxygen</subject><subject>Particle Size</subject><subject>Physical Sciences</subject><subject>Physics</subject><subject>Povidone - 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The structural and optical properties of the calcined silver nanoparticles at 600°C with diverse Poly(vinylpyrrolidone) concentrations varied from 2% to 4% were studied by means of different techniques. Fourier transform infrared spectroscopy was used to monitor the production of pure Ag nanoparticles at a given Poly(vinylpyrrolidone) concentration. The X-ray powder diffraction spectra are evidence for the transformation of the amorphous sample at 30°C to the cubic crystalline nanostructures at the calcination temperatures for all Poly(vinylpyrrolidone) concentrations. The transmission electron microscopy images showed the creation of spherical silver nanoparticles with the average particle size decreased by increasing Poly(vinylpyrrolidone) concentrations from 4.61 nm at 2% to 2.49 nm at 4% Poly(vinylpyrrolidone). The optical properties were investigated by means of UV-vis absorption spectrophotometer, which showed an increase in the conduction band of Ag nanoparticles with increasing Poly(vinylpyrrolidone) concentrations from 2.83 eV at 2% Poly(vinylpyrrolidone) to 2.94 eV at 4% Poly(vinylpyrrolidone) due to decreasing particle size. This was due to less attraction between conduction electrons and metal ions for smaller particle size corresponding to fewer atoms that made up the metal nanoparticles.</abstract><cop>United States</cop><pub>Public Library of Science</pub><pmid>29045414</pmid><doi>10.1371/journal.pone.0186094</doi><orcidid>https://orcid.org/0000-0003-2590-7664</orcidid><oa>free_for_read</oa></addata></record> |
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| subjects | Conduction Conduction bands Conduction electrons Electron microscopy Engineering and Technology Fourier transforms Gold Heat treatment Image transmission Infrared spectroscopy Metal Nanoparticles - chemistry Metal Nanoparticles - ultrastructure Metals Methods Nanocomposites Nanomaterials Nanoparticles Nanotechnology Nanotechnology - methods Optical Phenomena Optical properties Oxygen Particle Size Physical Sciences Physics Povidone - pharmacology Powders Radiation therapy Research and Analysis Methods Roasting Silver Silver - pharmacology Spectrophotometers Spectrophotometry, Ultraviolet Spectroscopy, Fourier Transform Infrared Temperature Transformation Transmission electron microscopy Ultraviolet absorption Vinyl compounds Vinylpyrrolidone Waste treatment X ray powder diffraction X-Ray Diffraction |
| title | Influence of Poly(vinylpyrrolidone) concentration on properties of silver nanoparticles manufactured by modified thermal treatment method |
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