Synthesis and characterization of gold nanodogbones by the seeded mediated growth method

Huang, Chien Jung; Chiu, Pin Hsiang; Wang, Yeong-Her; Meen, Teen Hang; Yang, Cheng Fu

doi:10.1088/0957-4484/18/39/395603

Cited by 31 publications

(19 citation statements)

References 40 publications

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“…An amorphous structure was observed from both Ti and Zr specimens. Au showed a strong and sharp (111) peak of face‐centered cubic (FCC)‐structured gold crystals originating from sputter‐deposited gold, indicating that highly oriented gold grows on the substrate with spatter deposition.…”

Section: Resultsmentioning

confidence: 99%

Differences in the calcification of preosteoblast cultured on sputter‐deposited titanium, zirconium, and gold

Chen

Nagai

Tsutsumi

et al. 2015

J Biomedical Materials Res

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In this study, osteogenic differentiation and calcification of preosteoblast (MC3T3-E1) cultured on sputter-deposited titanium (Ti), zirconium (Zr), and gold (Au) on cover glasses were evaluated to understand the differences in bone formation ability among these three metals; these metals show the same high corrosion resistance, but Ti and Zr are covered by surface passive oxide film while Au is not covered by the oxide film. Ti and Zr promoted cellular proliferation without osteogenic differentiation. Cells cultured on Ti and Zr expressed higher levels of Runx2, Col1α1, and Akp2 at an earlier stage, which indicated faster promotion of osteogenic differentiation, as compared to those cultured on Au. Moreover, after 21 days of culture, the Bglap1 and Ifitm5 expression peaks in cells cultured on Ti and Zr were higher than those in cells cultured on Au, which indicated faster promotion of calcification. Cells cultured on Ti showed an advantage in osteogenic differentiation at an early stage, while cells on Zr showed better calcification promotion with a long-term culture. The amount of extracellular calcified deposits was in good agreement with the gene expression results. On the other hand, the intracellular calcium content of cells on Au specimens was higher than that of cells on Ti and Zr specimens. The results indicate that preosteoblasts on Ti and Zr showed faster osteogenic differentiation and calcification than those on Au, whereas Au improved the intracellular calcium content. © 2015 Wiley Periodicals, Inc. J Biomed Mater Res Part A: 104A: 639-651, 2016.

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Section: Resultsmentioning

confidence: 99%

Differences in the calcification of preosteoblast cultured on sputter‐deposited titanium, zirconium, and gold

Chen

Nagai

Tsutsumi

et al. 2015

J Biomedical Materials Res

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“…7 8 While great advances have been made in the bottom-up wet chemical synthesis of short gold * Author to whom correspondence should be addressed. nanorods (aspect ratio < ∼6, length < ∼100 nm and longitudinal surface plasmon [LSP] wavelength < ∼1000 nm) in the last decade, [37][38][39][40][41][42][43][44][45][46][47][48][49][50][51][52] the fabrication of ultra-long gold nanorods through a wet chemical route still remains as a big challenge. One common method to achieve high AR gold nanorods is the use of a more stable cationic surfactant system instead of traditional cetyltrimethylammonium bromide (CTAB) in a seed-mediated approach.…”

Section: Introductionmentioning

confidence: 99%

Luminescent Silicon Nanoparticles Formed in Solution

Wei

Ji²,

Shen³

2008

j nanosci nanotechnol

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This review focuses on the preparation of Si nanoparticles by wet-chemical routes. The methods described include dispersion from porous silicon, etching and surface functionalization of Si/SiO2 powders and direct chemical reaction of Si precursors. Photoluminescence of silicon nanoparticles can be tuned to cover the whole visible spectrum depending on particle size. The excitonic origin or nature of PL has been generally accepted. Some researchers observed exciton recombination across the direct band-gap, i.e., gamma-gamma transitions, while others evidenced indirect nature of excitonic radiative recombination, which becomes direct in very small particles of 1-2 nm. A large redshift of photoluminescence from these small silicon nanoparticles has been explained by a localized surface states model. Others argue that no localized states are found in the band-gap if a complete oxide shell is formed, and the photoluminescence redshift is due to modification of band-edge states.

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“…Spherical AuNP dispersions exhibited a characteristic Plasmon absorption band at 500–575 nm as measured by UV–vis spectrophotometer. These absorption values have dependency on AuNPs size and crystal structure . The absorption wavelength values are given in Table and indicated AuNP diameters to be between 5.0 and 10.0 nm (Fig.…”

Section: Resultsmentioning

confidence: 96%

Preparation of Cross‐Linked Micelles from Glycidyl Methacrylate Based Block Copolymers and Their Usages as Nanoreactors in the Preparation of Gold Nanoparticles

Koçak

Solmaz

Dikmen

et al. 2017

J. Polym. Sci. Part A: Polym. Chem.

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This study reports the synthesis of poly(ethylene glycol)methyl ether‐block‐poly(glycidyl methacrylate) (MPEG‐b‐PGMA) diblock, and poly(ethylene glycol)methyl ether‐block‐poly(glycidyl methacrylate)‐block‐poly(methyl methacrylate) (MPEG‐b‐PGMA‐b‐PMMA) triblock copolymers via atom transfer radical polymerization and their self‐assembly behaviors in aqueous media by using acetone as cosolvent. These block copolymers formed near monodisperse core–shell micelles having cross‐linkable cores. Two types of cross‐linked micelles, namely spherical MPEG‐b‐PGMA core cross‐linked (CCL) micelles and MPEG‐b‐PGMA‐b‐PMMA interlayer cross‐linked (ILCL) micelles, were also successfully prepared from these block copolymers by using various bifunctional cross‐linkers such as hexamethylenediamine (HMDA), ethylenediamine (EDA), and 2‐aminoethanethiol (AET). Cross‐linking was successfully carried out via ring‐opening reactions of epoxy residues of hydrophobic‐cores with primary amine or thiol groups of bifunctional cross‐linkers. Finally, these cross‐linked micelles were successfully used as nanoreactors in the synthesis of gold nanoparticles (AuNPs) in aqueous media. Both CCL and ILCL micelles were found to be good stabilizers for AuNPs in aqueous media. Both CCL‐ and ILCL‐stabilized AuNP dispersions were stable for a long time without any size changes and flocculation at room temperature. These cross‐linked stabilized AuNPs exhibited good catalytic activities in the reduction of p‐nitrophenol. © 2017 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2018, 56, 514–526.

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Synthesis and characterization of gold nanodogbones by the seeded mediated growth method

Cited by 31 publications

References 40 publications

Differences in the calcification of preosteoblast cultured on sputter‐deposited titanium, zirconium, and gold

Differences in the calcification of preosteoblast cultured on sputter‐deposited titanium, zirconium, and gold

Luminescent Silicon Nanoparticles Formed in Solution

Preparation of Cross‐Linked Micelles from Glycidyl Methacrylate Based Block Copolymers and Their Usages as Nanoreactors in the Preparation of Gold Nanoparticles

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