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Intermatrix synthesis: easy technique permitting preparation of polymer-stabilized nanoparticles with desired composition and structure.

Ruiz P, Macanás J, Muñoz M, Muraviev DN - Nanoscale Res Lett (2011)

Bottom Line: The synthesis of polymer-stabilized nanoparticles (PSNPs) can be successfully carried out using intermatrix synthesis (IMS) technique, which consists in sequential loading of the functional groups of a polymer with the desired metal ions followed by nanoparticles (NPs) formation stage.This allows for repeating the cycles to increase the NPs content or to obtain NPs with different structures and compositions (e.g. core-shell or core-sandwich).This article reports the results on the further development of the IMS technique.

View Article: PubMed Central - HTML - PubMed

Affiliation: Analytical Chemistry Division, Department of Chemistry, Universitat Autònoma de Barcelona, 08193 Bellaterra, Barcelona, Spain. Patricia.Ruiz.Nicolas@uab.cat.

ABSTRACT
The synthesis of polymer-stabilized nanoparticles (PSNPs) can be successfully carried out using intermatrix synthesis (IMS) technique, which consists in sequential loading of the functional groups of a polymer with the desired metal ions followed by nanoparticles (NPs) formation stage. After each metal-loading-NPs-formation cycle, the functional groups of the polymer appear to be regenerated. This allows for repeating the cycles to increase the NPs content or to obtain NPs with different structures and compositions (e.g. core-shell or core-sandwich). This article reports the results on the further development of the IMS technique. The formation of NPs has been shown to proceed by not only the metal reduction reaction (e.g. Cu0-NPs) but also by the precipitation reaction resulting in the IMS of PSNPs of metal salts (e.g. CuS-NPs).

No MeSH data available.


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SEM image and Pb concentration profile obtained by EDS of cross section of PbS-PSMNPs-SPEEK nanocomposite membrane.
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Figure 2: SEM image and Pb concentration profile obtained by EDS of cross section of PbS-PSMNPs-SPEEK nanocomposite membrane.

Mentions: Furthermore, it is also noteworthy that reduction reaction (Me12+ + 2BH4- + 6H2O → 7H2↑ + 2B(OH)3 + Me1°) can be replaced by a precipitation reaction (Me12+ + S2- → Me1S) if an ionic precipitating reagent bearing the charge of the same sign as that of the functional groups of the polymer (e.g. S2-) is used instead of a ionic reducing reagent (BH4-). As it is seen in Figure 2, the distribution of PbS-NPs obtained by IMS is similar to that for zero-valent metal NPs, i.e. PbS-NPs are mainly located near the nanocomposite sample edges. The following important conclusion follows from the results obtained: in the course of IMS of INPs when using ionic reduction or precipitation reagents, the Donnan exclusion effect appears to be the driving force responsible for the surface distribution of INPs (see EDS in Figure 2). The necessary condition in this case is the coincidence of the charge sign of ionic reagent with that of the functional groups of the hosting polymer.


Intermatrix synthesis: easy technique permitting preparation of polymer-stabilized nanoparticles with desired composition and structure.

Ruiz P, Macanás J, Muñoz M, Muraviev DN - Nanoscale Res Lett (2011)

SEM image and Pb concentration profile obtained by EDS of cross section of PbS-PSMNPs-SPEEK nanocomposite membrane.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3211432&req=5

Figure 2: SEM image and Pb concentration profile obtained by EDS of cross section of PbS-PSMNPs-SPEEK nanocomposite membrane.
Mentions: Furthermore, it is also noteworthy that reduction reaction (Me12+ + 2BH4- + 6H2O → 7H2↑ + 2B(OH)3 + Me1°) can be replaced by a precipitation reaction (Me12+ + S2- → Me1S) if an ionic precipitating reagent bearing the charge of the same sign as that of the functional groups of the polymer (e.g. S2-) is used instead of a ionic reducing reagent (BH4-). As it is seen in Figure 2, the distribution of PbS-NPs obtained by IMS is similar to that for zero-valent metal NPs, i.e. PbS-NPs are mainly located near the nanocomposite sample edges. The following important conclusion follows from the results obtained: in the course of IMS of INPs when using ionic reduction or precipitation reagents, the Donnan exclusion effect appears to be the driving force responsible for the surface distribution of INPs (see EDS in Figure 2). The necessary condition in this case is the coincidence of the charge sign of ionic reagent with that of the functional groups of the hosting polymer.

Bottom Line: The synthesis of polymer-stabilized nanoparticles (PSNPs) can be successfully carried out using intermatrix synthesis (IMS) technique, which consists in sequential loading of the functional groups of a polymer with the desired metal ions followed by nanoparticles (NPs) formation stage.This allows for repeating the cycles to increase the NPs content or to obtain NPs with different structures and compositions (e.g. core-shell or core-sandwich).This article reports the results on the further development of the IMS technique.

View Article: PubMed Central - HTML - PubMed

Affiliation: Analytical Chemistry Division, Department of Chemistry, Universitat Autònoma de Barcelona, 08193 Bellaterra, Barcelona, Spain. Patricia.Ruiz.Nicolas@uab.cat.

ABSTRACT
The synthesis of polymer-stabilized nanoparticles (PSNPs) can be successfully carried out using intermatrix synthesis (IMS) technique, which consists in sequential loading of the functional groups of a polymer with the desired metal ions followed by nanoparticles (NPs) formation stage. After each metal-loading-NPs-formation cycle, the functional groups of the polymer appear to be regenerated. This allows for repeating the cycles to increase the NPs content or to obtain NPs with different structures and compositions (e.g. core-shell or core-sandwich). This article reports the results on the further development of the IMS technique. The formation of NPs has been shown to proceed by not only the metal reduction reaction (e.g. Cu0-NPs) but also by the precipitation reaction resulting in the IMS of PSNPs of metal salts (e.g. CuS-NPs).

No MeSH data available.


Related in: MedlinePlus