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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.

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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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Calibrations curves of electrochemical responses towards H2O2 with (a) CuS-PSNPs-based amperometric sensors synthesized by in situ and ex situ IMS technique and (b) with Cu and CuS-PSNPs-based amperometric sensors freshly prepared and after 3 days in buffer solution. Experimental conditions: -250 mV; 0.1M acetic/acetate buffer, pH 5. (c) TEM images corresponding to CuS-PSNPs synthesized in situ
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Figure 5: Calibrations curves of electrochemical responses towards H2O2 with (a) CuS-PSNPs-based amperometric sensors synthesized by in situ and ex situ IMS technique and (b) with Cu and CuS-PSNPs-based amperometric sensors freshly prepared and after 3 days in buffer solution. Experimental conditions: -250 mV; 0.1M acetic/acetate buffer, pH 5. (c) TEM images corresponding to CuS-PSNPs synthesized in situ

Mentions: One of the possible applications of nanocomposite materials containing Cu2S-NPs is their use as catalytically active elements in electroanalytical devices such as amperometric sensors [21,23,33,34]. The sensor modification can be achieved by two different ways: (i) by depositing an ink containing INPs onto the electrode surface or (ii) by depositing the INPs-free polymeric matrix followed by the in situ IMS of INPs [4,21]. In the second case, the electrochemical response of the modified sensors appears to be lower than that of the sensors obtained by the ex situ method (see Figure 5a). TEM characterization of PSNPs prepared by in situ IMS shows the formation of a kind of nanowires (see Figure 5a) that could be responsible for the lower sensitivity of sensors since they are characterized by a lower surface area of INPs in comparison with well-separated spherical NPs.


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)

Calibrations curves of electrochemical responses towards H2O2 with (a) CuS-PSNPs-based amperometric sensors synthesized by in situ and ex situ IMS technique and (b) with Cu and CuS-PSNPs-based amperometric sensors freshly prepared and after 3 days in buffer solution. Experimental conditions: -250 mV; 0.1M acetic/acetate buffer, pH 5. (c) TEM images corresponding to CuS-PSNPs synthesized in situ
© Copyright Policy - open-access
Related In: Results  -  Collection

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

Figure 5: Calibrations curves of electrochemical responses towards H2O2 with (a) CuS-PSNPs-based amperometric sensors synthesized by in situ and ex situ IMS technique and (b) with Cu and CuS-PSNPs-based amperometric sensors freshly prepared and after 3 days in buffer solution. Experimental conditions: -250 mV; 0.1M acetic/acetate buffer, pH 5. (c) TEM images corresponding to CuS-PSNPs synthesized in situ
Mentions: One of the possible applications of nanocomposite materials containing Cu2S-NPs is their use as catalytically active elements in electroanalytical devices such as amperometric sensors [21,23,33,34]. The sensor modification can be achieved by two different ways: (i) by depositing an ink containing INPs onto the electrode surface or (ii) by depositing the INPs-free polymeric matrix followed by the in situ IMS of INPs [4,21]. In the second case, the electrochemical response of the modified sensors appears to be lower than that of the sensors obtained by the ex situ method (see Figure 5a). TEM characterization of PSNPs prepared by in situ IMS shows the formation of a kind of nanowires (see Figure 5a) that could be responsible for the lower sensitivity of sensors since they are characterized by a lower surface area of INPs in comparison with well-separated spherical NPs.

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