Synthesis of alginate stabilized gold nanoparticles by γ-irradiation with controllable size using different Au3+ concentration and seed particles enlargement

Anh, Nguyen Tue; Phú, Đặng Văn; Duy, Nguyễn Ngọc; Du, Bùi Duy; Hiến, Nguyễn Quốc

doi:10.1016/j.radphyschem.2009.11.013

Cited by 52 publications

(12 citation statements)

References 27 publications

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“…Thus, as Au 3+ concentration increased the sizes of the AuNPs were bigger and max shifted to longer wavelengths. The increase of AuNPs size with the increasing of Au 3+ concentration was also reported in previous articles for AuNPs/PVP [3], AuNPs/ alginate [13], and AuNPs/hyaluronan [15]. The reason for this phenomenon may be due to the development of clusters and the agglomeration among AuNPs when the ratio of stabilizer and Au 3+ concentration is not high enough [15].…”

Section: Effect Of Ausupporting

confidence: 80%

“…In addition, biopolymers such as chitosan [9][10][11], alginate [12,13], hyaluronan [14,15], gum arabic [16,17], protein [18,19], gelatin [20], dextran [21], and glucomannan [22] have been also used as stabilizers of colloidal AuNPs solution. On the other hand, materials based on functionalized AuNPs are regarded as one of the most important nanocomposites especially due to their biological and catalytic activities [23,24].…”

Section: Introductionmentioning

confidence: 99%

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Synthesis of Gold Nanoparticles Stabilized in Dextran Solution by Gamma Co-60 Ray Irradiation and Preparation of Gold Nanoparticles/Dextran Powder

Diem

Thao

Phú

et al. 2017

Journal of Chemistry

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Gold nanoparticles (AuNPs) in spherical shape with diameter of 6-35 nm stabilized by dextran were synthesized by -irradiation method. The AuNPs were characterized by UV-Vis spectroscopy and transmission electron microscopy. The influence of pH, Au 3+ concentration, and dextran concentration on the size of AuNPs was investigated. Results indicated that the smallest AuNPs size (6 nm) and the largest AuNPs size (35 nm) were obtained for pH of 1 mM Au 3+ /1% dextran solution of 5.5 and 7.5, respectively. The smaller Au 3+ concentration favored smaller size and conversely the smaller dextran concentration favored bigger size of AuNPs. AuNPs powders were prepared by spay drying, coagulation, and centrifugation and their sizes were also evaluated. The purity of prepared AuNPs powders was also examined by energy dispersive X-ray (EDX) analysis. Thus, the as-prepared AuNPs stabilized by biocompatible dextran in solution and/or in powder form can be potentially applied in biomedicine and pharmaceutics.

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Section: Effect Of Ausupporting

confidence: 80%

Section: Introductionmentioning

confidence: 99%

Synthesis of Gold Nanoparticles Stabilized in Dextran Solution by Gamma Co-60 Ray Irradiation and Preparation of Gold Nanoparticles/Dextran Powder

Diem

Thao

Phú

et al. 2017

Journal of Chemistry

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“…The size of the AuNPs synthesized by this method is much smaller than that obtained by Turkevich‐Frens, and the Au‐sulfur bond between the thiolate and the AuNPs is stronger than the bond formed between Au‐citrate. The withdraw of the common synthetic routes (including citrate, borohydride or other organic compounds) is that they may be associated with environmental toxicity or biological hazards . Some previous studies have introduced a green method using natural polymers and flavonoids.…”

Section: Introductionmentioning

confidence: 66%

Electrochemical Characterization and Electrocatalytic Application of Gold Nanoparticles Synthesized with Different Stabilizing Agents

et al. 2017

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Gold nanoparticles (AuNPs) have unique properties, making them attractive for electronic and energy‐conversion devices and as (electro)catalysts for electrochemical sensors. In addition to the size and shape of AuNPs, the electrocatalytic properties of AuNP‐sensors are also determined by the stabilizing agent used in their synthesis. Here, AuNPs were synthesized with citrate, alginate and quercetin, obtaining spherical and negatively charged nanoparticles. The AuNPs were used to modify glassy carbon electrodes (AuNPs/GCE), which were characterized by scanning electron microscopy and electrochemical techniques. The AuNPs/GCE showed aggregates of different sizes and degrees of dispersion on the electrode surface depending on the stabilizing agent. The AuNP's aggregates affect the homogeneity of the film, the reproducibility of the electrodes and their response in buffer solution. Finally, to evaluate the electrocatalytic ability of the AuNPs/GCE, we studied the oxidation of two analytes with opposite charges: (1) sunset yellow (negative) and (2) hydrazine (positive). Compared with GCE, the AuNPs/GCE showed good electrocatalytic properties for hydrazine, increasing the current up to 50 % and shifting the potential by almost 400 mV, depending on the AuNP used. For the negatively charged analyte, the current decreased up to 50 % and no shift in potential was observed. Thus, the electrocatalytic properties of the AuNPs showed to be highly dependent on the nature of the analyte.

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“…A number of methods have been reported for the synthesis of AuNPs, such as chemical [3,[5][6][7], photochemical [8], sonochemical [9] and radiolytic [10][11][12] reduction. In these methods, ionizing radiation has been considered as an effective method due to several advantages, as described in our previous papers [12,13]; especially, mass production can be carried out and satisfies the requirements of clean production.…”

Section: Introductionmentioning

confidence: 99%

“…com), in cancer diagnostics and therapy [16] should be biocompatible and nontoxic. Thus, besides the 'green' synthesis method, natural polymers such as chitosan [2,6,17,18], alginate [11], hyaluronan [12], gum arabic [19], protein [20], soluble starch [21], heparin [22] have been used as stabilizers. Because of the biocompatibility, biodegradability and nontoxicity, many works have used chitosan as a stabilizer agent for AuNPs.…”

Section: Introductionmentioning

confidence: 99%

Electron beam/ γ -ray irradiation synthesis of gold nanoparticles and investigation of antioxidant activity

Nguyen

Dang

et al. 2014

Adv. Nat. Sci: Nanosci. Nanotechnol.

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Colloidal solutions of 1 mM gold nanoparticles (AuNPs) were synthesized by γ-ray Co-60 and electron beam irradiation using 1% water soluble chitosan (WSC) with different molecular weight (Mw) as stabilizer. The AuNPs size measured from TEM images was of 7.1 and 15.1 nm for electron beam and γ-ray Co-60, respectively. The AuNPs sizes of 9.8, 15.1 and 22.4 nm stabilized by different WSC Mw of 155 × 10 3 , 78 × 10 3 and 29 × 10 3 g mol −1 , respectively, were also synthesized by γ-ray Co-60 irradiation. Antioxidant activity of AuNPs with different size from 7.1 to 20.0 nm was investigated using free radical 2,2′-azino-bis (3-ethylbenzothiazoline-6sulphonic acid) (ABTS •+ ). Results indicated that the smaller size of AuNPs exhibited higher antioxidant activity. In particular, the antioxidant efficiency was of nearly 100, 75, 65, 52 and 30% for 7.1, 9.8, 15.1, 20.0 nm AuNPs and WSC 0.1%, respectively, at the same reaction time of 270 min. Thus, due to the compatibility of WSC and the unique property of AuNPs, the pure colloidal AuNPs/WSC solutions synthesized by irradiation method can be potentially applied in biomedicine, cosmetics and in other fields as well.

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Synthesis of alginate stabilized gold nanoparticles by γ-irradiation with controllable size using different Au3+ concentration and seed particles enlargement

Cited by 52 publications

References 27 publications

Synthesis of Gold Nanoparticles Stabilized in Dextran Solution by Gamma Co-60 Ray Irradiation and Preparation of Gold Nanoparticles/Dextran Powder

Synthesis of Gold Nanoparticles Stabilized in Dextran Solution by Gamma Co-60 Ray Irradiation and Preparation of Gold Nanoparticles/Dextran Powder

Electrochemical Characterization and Electrocatalytic Application of Gold Nanoparticles Synthesized with Different Stabilizing Agents

Electron beam/ γ -ray irradiation synthesis of gold nanoparticles and investigation of antioxidant activity

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