Preparation of Gold Nanoplates by a Microwave-polyol Method

Tsuji, Masaharu; Hashimoto, Masayuki; Nishizawa, Yuki; Tsuji, Takeshi

doi:10.1246/cl.2003.1114

Cited by 131 publications

(94 citation statements)

References 4 publications

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“…2), broad surface plasmon bands of Au nanoparticles appear in 500-700 nm regions. It is known that a surface plasmon band of spherical Au nanoparticles appears in the 500-600 nm regions with a sharp peak at about 520 nm (Henglein, 1999;Pastoriza-Santos and Liz-Marzan, 2002;Malikova et al, 2002) while plasmon bands of polygonal Au nanoparticles are observed in the 550-800 nm region (Tsuji et al, 2003).…”

Section: Synthesis Of Au Nanoparticlesmentioning

confidence: 99%

“…In general, a mixture of reagent and polymer surfactant in Ethylene Glycol (EG) was heated in an oil bath for several hours and spherical nanoparticles were prepared. Recently Microwave (MW) heating has been coupled with the polyol method for rapid preparation of Au nanoparticles (Tsuji et al, 2003;. This study describes the preparation of various sizes and shapes of Au nanoparticles for mercury adsorption by using polyol method under MW heating.…”

Section: Introductionmentioning

confidence: 99%

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Synthesis of Gold (Au) Nanoparticles for Mercury Adsorption

Kamarudin¹

2010

American Journal of Applied Sciences

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Problem statement: Mercury is not only hazardous to human health and the environment but could also attack equipment components resulting in a mechanical failure and gas leakage. Approach: Describes the preparation of various sizes and shapes of Au nanoparticles for mercury adsorption by using polyol method under MW heating. Au nanoparticles have been synthesized by a polyol method under Microwave (MW) heating in the presence of Au seed ([Au] 1 /[Au] 0 = 6 of molar ratio) and different Polyvinylpyrrolidone (PVP) concentrations (11.1, 22.2 and 33.3 mM). The amount of mercury adsorbed was determined by analyzing the concentration of mercury solution before and after the contacts with various sizes and shapes of Au nanoparticles. Results: When the lower PVP concentration (11.1 mM) was used, polygonal and spherical nanoparticles were dominantly present, while spherical nanoparticles were preferentially form by using higher PVP concentrations (22.2 and 3.33 mM). It was found that the diameter and length of Au nanoparticles decreased with increasing PVP concentrations. When Au nanoparticles solution was prepared using Au seed, significant changes in sizes and shapes of Au seed occurred. Spherical nanoparticles in the Au seed (22.2 mM) were completely changed to polygonal nanoparticles. The amount of mercury adsorbed using 9 ppm mercury solution on polygonal nanoparticles is higher (64.88%) than spherical nanoparticles (18.77%). Conclusion: These results indicated that mercury adsorption strongly depends on the sizes and shapes of Au nanoparticles. Polygonal nanoparticles adsorbed more mercury than spherical nanoparticles but the amount mercury adsorbed is inversely proportional to their size.

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Section: Synthesis Of Au Nanoparticlesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Synthesis of Gold (Au) Nanoparticles for Mercury Adsorption

Kamarudin¹

2010

American Journal of Applied Sciences

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“…The metal and semiconductor nanoparticles synthesis is an extending research area for the potential applications of nanoparticles and for the advancement of novel technologies [2,3]. The nanoparticles can be synthesized by different methods (physical, chemical, and biological) and by using different substrates (pure compounds, microorganism, and plant extract) [4,5]. The chemical approach is robustly scaled for the large-scale production of nanoparticles of tunable shape and size by using different synthesis conditions.…”

Section: Introductionmentioning

confidence: 99%

Rapid Synthesis of Gold Nanoparticles from Quercus incana and Their Antimicrobial Potential against Human Pathogens

et al. 2017

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Abstract:In current study, bioreduction of tetrachloroauric acid (HAuCl 4 ·3H 2 O) was carried out using leaves extract of Quercus incana for nanoparticle synthesis. The nanoparticles were characterized by ultraviolet visible spectrum (UV), Fourier-transform infrared (FT-IR), and transmission electron microscopy (TEM) analysis. The gold nanoparticles (GNPs) were generally clumpy agglomerates of polydispersed particles, with an average size in the range 5.5-10 nm. The Gas chromatography-mass spectrometry (GC-MS) qualitative analysis and FT-IR data supported the presence of bioactive compounds, which are responsible for the metal reduction and nanoparticles stabilization. The biocompatibility of synthesized GNPs was evaluated via antibacterial activity by using human bacterial pathogens. The results showed that synthesized GNPs showed enhanced antibacterial activity against all bacterial pathogens.

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“…Nanoparticle synthesis using physical and chemical processes are routinely utilized to synthesize metal nanoparticles, which allow one to obtain particles with the desired characteristics (Tsuji et al, 2003). However, both these methods are usually expensive, laborintensive, and are potentially hazardous to the environment and living organisms (Narayana and Sakthivel, 2010).…”

Section: Introductionmentioning

confidence: 99%