On the feasibility of determining nanoparticle concentration by the dynamic light scattering method

Высоцкий, В. В.; Uryupina, O. Ya.; Gusel’nikova, A. V.; Roldugin, V. I.

doi:10.1134/s1061933x09060027

Cited by 43 publications

(25 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…12). 24, 25

I = B P

where I is the scattered light intensity, B is a constant and P is the photon count rate. The scattered light intensity is related to both size and concentrations of nanoparticles.…”

Section: Ensemble Measurementsmentioning

confidence: 99%

“…13). 25

I = I_{0} \frac{π^{4} false(1 + {cos}^{2} θ false)}{8 R^{2} λ^{4}} {true(\frac{m^{2} - 1}{m^{2} + 2} true)}^{2} d^{6} C

where I 0 is the incident light intensity, θ is the scattering angle, R is the distance between the point of observation and the particle, λ is the wavelength of the incident light, m is the refractive index ratio of particles to the medium, d is the diameter of the nanoparticle, C is the number concentration of nanoparticles. As θ, R and λ are preset constants of a DLS instrument, Eq.…”

Section: Ensemble Measurementsmentioning

confidence: 99%

See 1 more Smart Citation

Nanoparticle counting: towards accurate determination of the molar concentration

2014

View full text Add to dashboard Cite

Summary Innovations in nanotechnology have brought tremendous opportunities for the advancement of many research frontiers, ranging from electronics, photonics, energy, to medicine. To maximize the benefits of nano-scaled materials in different devices and systems, precise control of their concentration is a prerequisite. While concentrations of nanoparticles have been provided in other forms (e.g., mass), accurate determination of molar concentration, arguably the most useful one for chemical reactions and applications, has been a major challenge (especially for nanoparticles smaller than 30 nm). Towards this significant yet chronic problem, a variety of strategies are currently under development. Most of these strategies are applicable to a specialized group of nanoparticles due to their restrictions on the composition and size ranges of nanoparticles. As research and uses of nanomaterials being explored in an unprecedented speed, it is necessary to develop universal strategies that are easy to use, and compatible with nanoparticles of different sizes, compositions, and shapes. This review outlines the theories and applications of current strategies to measure nanoparticle molar concentration, discusses the advantages and limitations of these methods, and provides insights into future directions.

show abstract

“…12). 24, 25

I = B P

where I is the scattered light intensity, B is a constant and P is the photon count rate. The scattered light intensity is related to both size and concentrations of nanoparticles.…”

Section: Ensemble Measurementsmentioning

confidence: 99%

“…13). 25

I = I_{0} \frac{π^{4} false(1 + {cos}^{2} θ false)}{8 R^{2} λ^{4}} {true(\frac{m^{2} - 1}{m^{2} + 2} true)}^{2} d^{6} C

Section: Ensemble Measurementsmentioning

confidence: 99%

Nanoparticle counting: towards accurate determination of the molar concentration

2014

View full text Add to dashboard Cite

show abstract

“…There is currently an active search for methods that can accurately detect and characterize nanoparticulate matter [6][7][8], especially in blood, tissues, or cells [9][10][11][12]. We recently demonstrated that (fluorescence) single-particle tracking (SPT) is a powerful technique that can accurately measure the size distribution of (fluorescently labeled) nanoparticles in undiluted complex biological fluids like blood [11].…”

Section: Introductionmentioning

confidence: 99%

Measuring absolute number concentrations of nanoparticles using single-particle tracking

et al. 2011

View full text Add to dashboard Cite

Single-particle tracking (SPT) microscopy is increasingly used to characterize nanoparticulate systems. We introduce a concept for estimation of particle number concentration in Brownian particle dispersions using SPT based on a model for the trajectory length distribution of particles to estimate the detection region volume. The resulting method is independent of precalibration reference measurements, and robust with respect to image processing settings. Experimentally estimated concentrations of different dilutions of 0.19-and 0.52-μm polymer nanospheres are in excellent agreement with estimates computed from the concentrations of the stock solutions.

show abstract

“…The conductivity of the system was determined by the metal inclusions involved in an infinite cluster of con ductivity channels (the conducting framework). Upon the formation of the infinite cluster, the jump like transition from the nonconducting to the conducting state occurred [11,12]. It was found that for the hybrid electrode material nanodispersed copper-sulfoca tion exchange membrane MK 40 (Cu 0 ⋅ MK 40), the sharp increase in the specific conductivity was reached for the metal content of 4.1 mmol/cm 3 (Fig.…”

Section: Resultsmentioning

confidence: 99%

The mechanism of electroreduction of nitrate ions on a hybrid electrode nanodispersed copper-MK-40 membrane

et al. 2012

View full text Add to dashboard Cite

Based on a MK 40 sulfocation exchange membrane, a hybride electrode material containing nanodispersed copper is prepared. The methods of scanning electron microscopy and X ray diffraction (XRD) analysis reveal the formation of copper agglomerates measuring 250-470 nm and consisting of indi vidual particles of 20-30 nm. The procedure of multistage chemical deposition of copper into the ion exchange carrier makes it possible to obtain a continuous cluster of metal particles which determines the elec tron conducting properties of the resulting hybrid material. The electrochemical activity of the nanocompos ite electrode is studied in the reaction of nitrate ion electroreduction. Nanodispersed copper deposited into the membrane is shown to intensify the electroreduction of nitrate ions by a factor of 1.5-2 as compared with a compact copper electrode. The electroreduction of nitrate ions on compact copper is shown to involve 6 electrons, whereas the electroreduction on the nanocomposite involves 8 electrons. The electroreduction products of nitrate ions are identified by the IR spectroscopy method.

show abstract

On the feasibility of determining nanoparticle concentration by the dynamic light scattering method

Cited by 43 publications

References 0 publications

Nanoparticle counting: towards accurate determination of the molar concentration

Nanoparticle counting: towards accurate determination of the molar concentration

Measuring absolute number concentrations of nanoparticles using single-particle tracking

The mechanism of electroreduction of nitrate ions on a hybrid electrode nanodispersed copper-MK-40 membrane

Contact Info

Product

Resources

About