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Size-controlled aerosol synthesis of silver nanoparticles for plasmonic materials.

Harra J, Mäkitalo J, Siikanen R, Virkki M, Genty G, Kobayashi T, Kauranen M, Mäkelä JM - J Nanopart Res (2012)

Bottom Line: A spectrophotometer was used to measure the optical extinction spectra of the prepared samples, which contained particles with diameters of approximately 50, 90 and 130 nm.By controlling the particle size, the dipolar peak of the localized surface plasmon resonance was tuned between wavelengths of 398 and 448 nm.In addition, quadrupolar resonances were observed at shorter wavelengths as predicted by the simplified theoretical model used to characterize the measured spectra.

View Article: PubMed Central - PubMed

ABSTRACT
Aerosol techniques were used to synthesize spherical and monodisperse silver nanoparticles for plasmonic materials. The particles were generated with an evaporation-condensation technique followed by size selection and sintering with a differential mobility analyzer and a tube furnace, respectively. Finally, the nanoparticles were collected on a glass substrate with an electrostatic precipitator. The particle size distributions were measured with a scanning mobility particle sizer and verified with a transmission electron microscope. A spectrophotometer was used to measure the optical extinction spectra of the prepared samples, which contained particles with diameters of approximately 50, 90 and 130 nm. By controlling the particle size, the dipolar peak of the localized surface plasmon resonance was tuned between wavelengths of 398 and 448 nm. In addition, quadrupolar resonances were observed at shorter wavelengths as predicted by the simplified theoretical model used to characterize the measured spectra.

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Size distributions of size-selected and sintered silver nanoparticles with diameters of approximately a 50, b 90 and c 130 nm. The distributions were calculated from several TEM images assuming that particles are spherical. The number of counted particles was 2546, 1289 and 594 for the 50, 90 and 130 nm particles, respectively
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Fig7: Size distributions of size-selected and sintered silver nanoparticles with diameters of approximately a 50, b 90 and c 130 nm. The distributions were calculated from several TEM images assuming that particles are spherical. The number of counted particles was 2546, 1289 and 594 for the 50, 90 and 130 nm particles, respectively

Mentions: Particle area distributions in the TEM samples were determined from several TEM images and converted to particle size distributions assuming spherical shape. Figure 7 shows size distributions of the three different samples shown in Fig. 6. Clearly all of the size distributions have two distinctive modes. The largest peaks at particle sizes of 46.6, 90.9 and 130.4, with relative standard deviations of 10.7, 9.2 and 8.7, respectively, correspond to separated spherical particles. The particle sizes and deviations are in good agreement with the SMPS measurements in Fig. 5. The second mode is partly caused by the tail extending to larger particles observed in the SMPS measurements. However, the main reason is the agglomeration on the substrate during the collection process as discussed earlier. In Fig. 7, the vertical lines, near the peaks of the second modes, at particle sizes of 71, 127 and 184 nm correspond to two attached spherical 50, 90 and 130 nm particles, respectively.Fig. 7


Size-controlled aerosol synthesis of silver nanoparticles for plasmonic materials.

Harra J, Mäkitalo J, Siikanen R, Virkki M, Genty G, Kobayashi T, Kauranen M, Mäkelä JM - J Nanopart Res (2012)

Size distributions of size-selected and sintered silver nanoparticles with diameters of approximately a 50, b 90 and c 130 nm. The distributions were calculated from several TEM images assuming that particles are spherical. The number of counted particles was 2546, 1289 and 594 for the 50, 90 and 130 nm particles, respectively
© Copyright Policy
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC3400035&req=5

Fig7: Size distributions of size-selected and sintered silver nanoparticles with diameters of approximately a 50, b 90 and c 130 nm. The distributions were calculated from several TEM images assuming that particles are spherical. The number of counted particles was 2546, 1289 and 594 for the 50, 90 and 130 nm particles, respectively
Mentions: Particle area distributions in the TEM samples were determined from several TEM images and converted to particle size distributions assuming spherical shape. Figure 7 shows size distributions of the three different samples shown in Fig. 6. Clearly all of the size distributions have two distinctive modes. The largest peaks at particle sizes of 46.6, 90.9 and 130.4, with relative standard deviations of 10.7, 9.2 and 8.7, respectively, correspond to separated spherical particles. The particle sizes and deviations are in good agreement with the SMPS measurements in Fig. 5. The second mode is partly caused by the tail extending to larger particles observed in the SMPS measurements. However, the main reason is the agglomeration on the substrate during the collection process as discussed earlier. In Fig. 7, the vertical lines, near the peaks of the second modes, at particle sizes of 71, 127 and 184 nm correspond to two attached spherical 50, 90 and 130 nm particles, respectively.Fig. 7

Bottom Line: A spectrophotometer was used to measure the optical extinction spectra of the prepared samples, which contained particles with diameters of approximately 50, 90 and 130 nm.By controlling the particle size, the dipolar peak of the localized surface plasmon resonance was tuned between wavelengths of 398 and 448 nm.In addition, quadrupolar resonances were observed at shorter wavelengths as predicted by the simplified theoretical model used to characterize the measured spectra.

View Article: PubMed Central - PubMed

ABSTRACT
Aerosol techniques were used to synthesize spherical and monodisperse silver nanoparticles for plasmonic materials. The particles were generated with an evaporation-condensation technique followed by size selection and sintering with a differential mobility analyzer and a tube furnace, respectively. Finally, the nanoparticles were collected on a glass substrate with an electrostatic precipitator. The particle size distributions were measured with a scanning mobility particle sizer and verified with a transmission electron microscope. A spectrophotometer was used to measure the optical extinction spectra of the prepared samples, which contained particles with diameters of approximately 50, 90 and 130 nm. By controlling the particle size, the dipolar peak of the localized surface plasmon resonance was tuned between wavelengths of 398 and 448 nm. In addition, quadrupolar resonances were observed at shorter wavelengths as predicted by the simplified theoretical model used to characterize the measured spectra.

No MeSH data available.


Related in: MedlinePlus