Unaffected features of BSA stabilized Ag nanoparticles after storage and reconstitution in biological relevant media

Valenti, Laura E.; Giacomelli, Carla E.

doi:10.1016/j.colsurfb.2015.05.002

Cited by 19 publications

(15 citation statements)

References 44 publications

(71 reference statements)

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“…Ag-NP were synthesized following the method described elsewhere (Valenti and Giacomelli 2015). Briefly, Ag-NP/citrate were synthesized by adding 1 mL of 0.1 mol L −1 AgNO 3 to 100 mL of 7 × 10 −4 mol L −1 trisodium citrate solution followed by 1 mL of 0.13 mol L −1 NaBH 4 .…”

Section: Synthesis Of Ag-npmentioning

confidence: 99%

“…(1) the well-known citrate procedure (Ag-NP/citrate) (Lok et al 2007) and (2) the addition of albumin before the reduction step (Ag-NP/albumin) (Valenti and Giacomelli 2015). The agglomeration behavior of Ag-NP/citrate strongly depends on the dispersion media (citrate, SBF, and NaNO 3 ) and incubation time ( Supplementary Information, Fig.…”

Section: Agglomeration Of Ag-npmentioning

confidence: 99%

“…2SI): a single and intense SPR band at around 418 nm appears in the three media and both incubation times. The reasons behind the 30-nm red-shifted spectra of Ag-NP/ albumin compared to Ag-NP/citrate can be related to several factors, such as the Ag-NP size, capping agent (MacCuspie 2011; Valenti and Giacomelli 2015), and redox surface sites (Li et al 2012). Moreover, the lack of broadening and shifting of SPR band in media of high ionic content indicates the absence of agglomeration of single Ag-NP/albumin and changes in size, shape, or coating of the nanoparticles dispersed in these media.…”

Section: Agglomeration Of Ag-npmentioning

confidence: 99%

“…Moreover, the lack of broadening and shifting of SPR band in media of high ionic content indicates the absence of agglomeration of single Ag-NP/albumin and changes in size, shape, or coating of the nanoparticles dispersed in these media. As a consequence, high ionic content induces the agglomeration of Ag-NP/citrate, mainly under long incubation time, whereas Ag-NP/albumin keeps the same size, shape, and coating in the three media and incubation times (Valenti and Giacomelli 2015). Citrate capping provides colloidal stability to Ag-NP only through electrostatic means, so the electrolyte concentration at biologically relevant conditions leads to rapid agglomeration of the Ag-NP.…”

Section: Agglomeration Of Ag-npmentioning

confidence: 99%

“…However, the agglomeration observed in media of high ionic strength (as culture medium) prevented to study the antimicrobial properties of these dispersions (Ag-NP/ citrate) in our previous work (Valenti and Giacomelli 2015). Instead, Ag-NP stabilized by adding albumin during the synthesis procedure (Ag-NP/albumin) showed an enhanced colloidal stability in media of high ionic content as well as in a wide pH range (Valenti and Giacomelli 2015). On the other hand, the presence of citrate as capping agent and/or in solution was found to significantly retard Ag-NP corrosion (Choi et al 2011;Stoermer et al 2005).…”

Section: Introductionmentioning

confidence: 99%

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Stability of silver nanoparticles: agglomeration and oxidation in biological relevant conditions

Valenti

Giacomelli

2017

J Nanopart Res

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Silver nanoparticles (Ag-NP) are the most used nanomaterial in consumer products due to the intrinsic antimicrobial capacity of silver. However, Ag-NP may be also harmful to algae, aquatic species, mammalian cells, and higher plants because both Ag + and nanoparticles are responsible of cell damages. The oxidative dissolution of Ag-NP would proceed to completion under oxic conditions, but the rate and extent of the dissolution depend on several factors. This work correlates the effect of the capping agent (albumin and citrate) with the stability of Ag-NP towards agglomeration in simulated body fluid (SBF) and oxidation in the presence of ROS species (H 2 O 2 ). Capping provides colloidal stability only through electrostatic means, whereas albumin acts as bulky ligands giving steric and electrostatic repulsion, inhibiting the agglomeration in SBF. However, citrate capping protects Ag-NP from dissolution to a major extent than albumin does because of its reducing power. Moreover, citrate in solution minimizes the oxidation of albumin-coated Ag-NP even after long incubation times. H 2 O 2 -induced dissolution proceeds to completion with Ag-NP incubated in SBF, while incubation in citrate leads to an incomplete oxidation. In short, albumin is an excellent capping agent to minimize Ag-NP agglomeration whereas citrate provides a mildreductive medium that prevents dissolution in biological relevant media as well as in the presence of ROS species. These results provide insight into how the surface properties and media composition affect the release of Ag + from Ag-NP, related to the cell toxicity and relevant to the storage and lifetime of silver-containing nanomaterials.

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Section: Synthesis Of Ag-npmentioning

confidence: 99%

Section: Agglomeration Of Ag-npmentioning

confidence: 99%

Section: Agglomeration Of Ag-npmentioning

confidence: 99%

Section: Agglomeration Of Ag-npmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Stability of silver nanoparticles: agglomeration and oxidation in biological relevant conditions

Valenti

Giacomelli

2017

J Nanopart Res

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High‐performance composite imprinted sensor based on the surface enhanced Raman scattering for selective detection of 2,6‐dichlorophenol in water

Wang

et al. 2017

J Raman Spectroscopy

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In this study, a novel detection method based on the technique of surface enhanced Raman scattering (SERS) was presented. Firstly, the homogeneous Ag particles were prepared and CdTe quantum dots were modified on the surface of Ag particles to synthesize the Ag/CdTe heterostructures as the SERS substrate. Then 2,6‐DCP was chosen as the template molecule and combined the technique of atom transfer radical polymerization to prepare Ag/CdTe/molecular imprinted polymers (MIPs). Through characterization analysis, it was proved that the Ag/CdTe/MIPs exhibited splendid SERS properties and selectivity. Under the optimal condition, it was presented good linear relationship (R2 = 0.96) between the Raman signal (at 1596 cm−1) and the concentration of the templates, and the detection limit was determined as 10−9 mol L−1. It was envisaged that the sensitivity of SERS coupled with the selective properties of MIPs could induce a promising chemosensor for practical applications.

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A novel label-free method for determination of inorganic mercury in environmental aqueous media using BSA-modified silver nanoparticles

Mehdinia

Basiri

Jabbari

2016

Int. J. Environ. Sci. Technol.

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Unaffected features of BSA stabilized Ag nanoparticles after storage and reconstitution in biological relevant media

Cited by 19 publications

References 44 publications

Stability of silver nanoparticles: agglomeration and oxidation in biological relevant conditions

Stability of silver nanoparticles: agglomeration and oxidation in biological relevant conditions

High‐performance composite imprinted sensor based on the surface enhanced Raman scattering for selective detection of 2,6‐dichlorophenol in water

A novel label-free method for determination of inorganic mercury in environmental aqueous media using BSA-modified silver nanoparticles

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