Formation of silver clusters by borohydride reduction of AgNO3 in polyacrylate aqueous solutions

Kovarskii, A. L.; Ревина, А. А.; Dobryakov, S. N.; Baider, L. M.; Тихонов, Н. А.

doi:10.1007/s10595-005-0008-5

Cited by 7 publications

(17 citation statements)

References 10 publications

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“…In fact, a higher range of blue colors is obtained for higher PAA concentrations (25, 100, or 250 mM; see Figure 1). This blue color has been reported in previous works using photochemical or chemical reduction [14,15,17], but not using DMAB as reducing agent in the presence of various PAA concentrations.…”

Section: Resultssupporting

confidence: 71%

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Effect of both protective and reducing agents in the synthesis of multicolor silver nanoparticles

et al. 2013

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In this paper, the influence of variable molar ratios between reducing and loading agents (1:100, 1:50, 1:20, 1:10, 1:5, 1:2, 1:1, 2:1) and between protective and loading agents (0.3:1, 0.75:1, 1.5:1, 3:1, 7.5:1, 30:1, 75:1) in the synthesis of silver nanoparticles by chemical reduction has been evaluated to obtain multicolor nanoparticles with a high stability in time. The protective agent poly(acrylic acid, sodium salt) (PAA) and reducing agent dimethylaminoborane (DMAB) play a key role in the formation of the resultant color. Evolution of the optical absorption bands of the silver nanoparticles as a function of PAA and DMAB molar ratios made it possible to confirm the presence of silver nanoparticles or clusters with a specific shape. The results reveal that a wide range of colors (violet, blue, green, brown, yellow, red, orange), sizes (from nanometer to micrometer), and shapes (cubic, rod, triangle, hexagonal, spherical) can be perfectly tuned by means of a fine control of the PAA and DMAB molar concentrations.

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Section: Resultssupporting

confidence: 71%

“…One of the most frequently used methods is the production of AgNPs from aqueous solutions of Ag+ salts by exposure to radiation (ambient light, UV–vis, gamma) [12-15] or via chemical reduction [16,17]. A wide number of solvents and encapsulating agents have been used to produce AgNPs and prevent their agglomeration [18-21].…”

Section: Introductionmentioning

confidence: 99%

Effect of both protective and reducing agents in the synthesis of multicolor silver nanoparticles

et al. 2013

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“…Nano‐scaled metal particles exhibit an intense band of the surface plasmon resonance, which is conditioned by the movement of conducting electrons at the particle surface 22. In our case the absorption band with λ max near 400 nm characterizes the surface plasmon resonance of Ag‐nanoparticles 20–22. According to the studies,22, 23 the band position, the absorption maximum and the band shape depend on particle size, form, polydispersity and surrounding medium.…”

Section: Formation Of Silver Nanoparticles In Dbc Solutionsmentioning

confidence: 73%

“…One of the most common methods to prepare silver nanoparticles is chemical reduction of silver ions by a strong agent such as sodium borohydride 20–22. Syntheses of silver nanoparticles in DBC solutions were carried out by the addition of NaBH 4 (from China) to Ag + /DBC blends (C DBC = 1 kg · m −3 ) at a molar ratio of [Ag + ]/[COO − ] = 0.1.…”

Section: Formation Of Silver Nanoparticles In Dbc Solutionsmentioning

confidence: 99%

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Self‐Assembly and Metalation of pH‐Sensitive Double Hydrophilic Block Copolymers with Interacting Polymer Components

Permyakova

Zheltonozhskaya

Revko

et al. 2012

Macromolecular Symposia

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Double hydrophilic diblock copolymers (DBCs) contained chemically complementary methoxypoly(ethylene oxide) and poly(acrylic acid) (MOPEO-b-PAAc) with the constant length of MOPEO block (M vMOPEO ¼ 5 kDa) and variable length of polyacid block (M nPAAc ¼ 9.9 Ä 23.1 kDa) were synthesized by a free radical block copolymerization of PAAc with methoxypoly(ethylene glycol) (MOPEG). These copolymers were pH-sensitive in aqueous medium, namely, at low pH the polyacid blocks were protonated and formed the intramolecular polycomplexes with MOPEO blocks that resulted in an intense micellization initiated by hydrophobic interactions between non-polar bound segments of the blocks. Hydrophobic ''core'' of the micelles comprised H-bonded segments of MOPEO and PAAc blocks while hydrophilic ''corona'' included the surplus units of longer blocks. The capability of DBCs as templates for the silver nanocluster/nanoparticle is considered. The kinetics of the Ag-nanoparticle growth in the copolymer matrices and optical properties of nanoclusters and nanoparticles were determined and discussed.

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Syntheses of Silver Nanoparticles in the Matrices of Block and Graft Copolymers and Polymer‐Inorganic Hybrid in Aqueous Solutions

Fedorchuk

Zheltonozhskaya

Gomza

et al. 2012

Macromolecular Symposia

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In the present work we have synthesized two-component block-and graft copolymers MOPEO-b-PAAm, PAAm-b-PEO-b-PAAm and PVA-g-PAAm comprised methoxypoly(ethylene oxide), poly(ethylene oxide) or poly(vinyl alcohol) and chemically complementary polyacrylamide and also the grafted polymer-inorganic hybrid SiO 2 -g-PAAm based on monodispersed silica nanoparticles. These copolymers we used as special matrices in the process of borohydride reduction of Agþ ions. It was established the influence of chemical nature, molecular architecture and concentration of the matrices and the content of silver nitrate on some reaction parameters, size and stability of Ag-nanoparticles in aqueous solutions.

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Formation of silver clusters by borohydride reduction of AgNO3 in polyacrylate aqueous solutions

Cited by 7 publications

References 10 publications

Effect of both protective and reducing agents in the synthesis of multicolor silver nanoparticles

Effect of both protective and reducing agents in the synthesis of multicolor silver nanoparticles

Self‐Assembly and Metalation of pH‐Sensitive Double Hydrophilic Block Copolymers with Interacting Polymer Components

Syntheses of Silver Nanoparticles in the Matrices of Block and Graft Copolymers and Polymer‐Inorganic Hybrid in Aqueous Solutions

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