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A rapid method to estimate the concentration of citrate capped silver nanoparticles from UV-visible light spectra
- Source :
- The Analyst. 139:4855
- Publication Year :
- 2014
- Publisher :
- Royal Society of Chemistry (RSC), 2014.
-
Abstract
- We present a generalized table of extinction coefficient data for silver nanoparticles from 8 to 100 nm. This table allows for easy and quick estimation of the concentration and size of modified and mono-dispersed silver nanoparticles from their optical spectra. We obtained data by determining the silver content of citrate-stabilised silver nanoparticles using sodium cyanide to dissolve the nanoparticles, and measuring solution conductivity with a pH meter and a cyanide-ion selective electrode. The quantification of the silver ion concentration enabled the calculation of extinction coefficients. Experimentally calculated extinction coefficients, in the current work, are in good agreement with collated literature values measured by different authors with non-standardized methodology and each for a limited range of particle size. They are also in good agreement with our theoretical calculations using Mie theory. Thus, we provide a highly standardized and comprehensive tabulated reference data-set.
- Subjects :
- Silver
Mie scattering
Analytical chemistry
Metal Nanoparticles
Physics::Optics
Nanoparticle
Biochemistry
pH meter
Chemistry Techniques, Analytical
Citric Acid
Silver nanoparticle
Analytical Chemistry
Coordination Complexes
Sodium Cyanide
Spectrophotometry
Electrochemistry
medicine
Environmental Chemistry
Particle Size
Spectroscopy
medicine.diagnostic_test
Chemistry
Molar absorptivity
Extinction (optical mineralogy)
Spectrophotometry, Ultraviolet
Particle size
Subjects
Details
- ISSN :
- 13645528 and 00032654
- Volume :
- 139
- Database :
- OpenAIRE
- Journal :
- The Analyst
- Accession number :
- edsair.doi.dedup.....6f3a7f017015f2835d300490eba245b4