The peculiarities of formation of the metal nanoparticles in irradiated polymer metal complexes

Zezin, A. B.; Feldman, Vladimir I.; Shmakova, N. A.; Valueva, S. P.; Ivanchenko, V. K.; Nikanorova, N.I.

doi:10.1016/j.nimb.2007.08.068

Cited by 20 publications

(6 citation statements)

References 8 publications

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“…This implies an autocatalytic effect in the formation of copper clusters and nanoparticles in the surface region, which is specific for X-ray irradiation. Indeed, as stated above, this effect was not observed for nanoparticles produced by γ-irradiation in the same system . Also to be mentioned, the nanoparticles obtained under X-ray irradiation are substantially larger that those observed in the γ-irradiated systems.…”

Section: Results and Discussionmentioning

confidence: 50%

“…Indeed, as stated above, this effect was not observed for nanoparticles produced by γ-irradiation in the same system. 13 Also to be mentioned, the nanoparticles obtained under X-ray irradiation are substantially larger that those observed in the γirradiated systems. Thus, the initial dose rate distribution is modified during irradiation, resulting in the appearance of a maximum in the surface region (within ± l e from the film surface).…”

Section: Resultsmentioning

confidence: 92%

“…A similar-type approach was used in our laboratory for a single-stage synthesis of nanocomposites containing copper and nickel nanoparticles from interpolyelectrolyte films in an aqueous-alcohol environment. 13 Meanwhile, to our knowledge, the applications of X-ray radiation for reduction of metal ions are still rather limited. Muller et al have introduced this method for surface treatment of a Langmuir monolayer leading to the formation of nanostructured films, 14 and later it was extended to the preparation of nanoparticles in bulk aqueous solutions.…”

Section: Introductionmentioning

confidence: 99%

“…The mechanism of the radiation-induced reduction of metal ions and formation of metal nanoparticles was studied in detail, − and potential applications were outlined. − It is worth noting that the cited works were carried out with γ-irradiation or fast electrons. A similar-type approach was used in our laboratory for a single-stage synthesis of nanocomposites containing copper and nickel nanoparticles from interpolyelectrolyte films in an aqueous-alcohol environment …”

Section: Introductionmentioning

confidence: 99%

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X-ray Induced Formation of Metal Nanoparticles from Interpolyelectrolyte Complexes with Copper and Silver Ions: The Radiation-Chemical Contrast

et al. 2013

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Tuning the size and spatial distribution of metal nanoparticles is a key issue for obtaining metal−polymer nanocomposites with desirable properties. It was shown that the action of white X-ray radiation (bremsstrahlung, E max ∼ 30 keV) on swollen films of interpolyelectrolyte complexes with copper and silver ions in an aqueousalcoholic environment resulted in the formation of a specific type of metal nanostructures characterized by transmission electron microscopy (TEM). The structure pattern was explained by autocatalytic enhancement of the rate of chemical transformations in the vicinity of preformed metal nanoparticles. The effect was attributed to increasing absorption of X-ray photons by compact metal nanoparticles leading to local sensitization described as the radiation-chemical contrast. The nanostructure pattern exhibited a remarkable evolution with increasing irradiation dose. In particular, at a certain stage, the big primary nanoparticles induce formation of "clouds" of ultrasmall secondary particles due to local distribution of the secondary electrons. The scale of the radiation-induced events is determined by the photon energy and electronic properties of absorbers. In the case of copper ions, major interaction occurs with K-electrons, whereas the interactions with both K-and L-electrons are significant for silver ions, which results in bimodal distribution of nanoparticle size.

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Section: Results and Discussionmentioning

confidence: 50%

Section: Resultsmentioning

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

X-ray Induced Formation of Metal Nanoparticles from Interpolyelectrolyte Complexes with Copper and Silver Ions: The Radiation-Chemical Contrast

et al. 2013

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“…Electronic and magnetic properties of magnetic nanoparticles embedded at a small concentration in different dielectric matrices could be used for manufacturing new generations of advanced functional materials [1][2][3][4][5][6][7][8][9][10][11]. Among the ferromagnetic metals (Fe, Co, and Ni) it is the nickel nanoparticles that could be applied as very good catalysts and galvanomagnetic materials [12].…”

Section: Introductionmentioning

confidence: 99%