Radiation induced synthesis of gold/iron-oxide composite nanoparticles using high-energy electron beam

Seino, Satoshi; Kinoshita, Takuya; Nakagawa, Takashi; Kojima, Takao; Taniguci, Ryoichi; Okuda, Shuichi; Yamamoto, Takao A.

doi:10.1007/s11051-007-9334-3

Cited by 79 publications

(36 citation statements)

References 14 publications

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“…A range of methods are used to coat nanoparticles with Au, either as a core-shell model [171] or as composite gold/ iron-oxide nanoparticles [152]. Microcarriers incorporating gold surfaces include electrodeposited nanowires [121] and our own magnetic barcodes-both polymer-encapsulated [68] and electrodeposited [127].…”

Section: Thiol and Disulphide Sam Functionalisation Of Goldmentioning

confidence: 99%

Magnetic biosensor technologies for medical applications: a review

Llandro

Palfreyman

Ionescu

et al. 2010

Med Biol Eng Comput

204

117

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In this review we discuss conventional methods of performing biological assays and molecular identification and highlight their advantages and limitations. An alternative approach based on magnetic nanotechnology is then presented. Firstly, magnetic carriers are introduced and their biocompatibility and functionalisation discussed, with spotlights on functionalisation via self assembled monolayers and on methods of reducing nonspecific binding. In addition an introduction is provided to the basic physical concepts behind the various types of sensors used to detect magnetic labels. Finally, progress in the field of magnetic biosensors and the outlook for the future are discussed.

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Section: Thiol and Disulphide Sam Functionalisation Of Goldmentioning

confidence: 99%

Magnetic biosensor technologies for medical applications: a review

Llandro

Palfreyman

Ionescu

et al. 2010

Med Biol Eng Comput

204

117

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“…Large network aggregates were formed when the NPs was applied to detect HBV DNA molecules. Seino et al [260] synthesized iron oxide/gold NPs using high-energy electron beam. Ȗ-Fe 2 O 3 NPs (26 nm) were dispersed in an aqueous solution containing HAuCl 4 , 2-propanil and PVA, and then closed up in a glass vial.…”

Section: Goldmentioning

confidence: 99%

Recent advances in surface engineering of superparamagnetic iron oxide nanoparticles for biomedical applications

Mahmoudi

Simchi

Imani

2010

JICS

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Superparamagnetic iron oxide nanoparticles (SPIONs) are promising materials for various biomedical applications including targeted drug delivery and imaging, hyperthermia, magneto-transfections, gene therapy, stem cell tracking, molecular/cellular tracking, magnetic separation technologies (e.g. rapid DNA sequencing), and detection of liver and lymph node metastases. The most recent applications for SPIONs for early detection of inflammatory, cancer, diabetes and atherosclerosis have also increased their popularity in academia. In order to increase the efficacy of SPIONs in the desired applications, especial surface coating/characteristics are required. The aim of this article is to review the surface properties of magnetic nanoparticles upon synthesis and the surface engineering by different coatings. The biological aspects, cytotoxicity, and health risks are addressed. Special emphasis is given to organic and inorganic-based coatings due to their determinant role in biocompatibility or toxicity of the final particles.

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“…The mechanism and procedure of this radiochemical method have been described elsewhere. [4,15,16] Hexachloroplatinic acid hexahydrate (H 2 PtCl 6 ¢6H 2 O, Wako Pure Chemical Industries) was used as the Pt precursor, and pure water (15 MV¢cm) produced by Direct-Q system (Millipore) was used as the solvent. Aqueous 50-mL solutions that contained 0.5 mM H 2 PtCl 6 were prepared in 100-mL glass vials.…”

Section: Synthesis Of Pàpt/cmentioning

confidence: 99%

Influence of pH on performance of sodium phosphinate for decreasing the particle size

Ohkubo

Seino

Nakagawa

et al. 2016

Journal of Experimental Nanoscience

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To clarify the influence of pH on performance of sodium phosphinate (NaPH 2 O 2 ) for decreasing particle size of Pt nanoparticles, carbonsupported Pt nanoparticles that contained phosphorus (PÀPt/C) were synthesised by an electron-beam irradiation reduction method (EBIRM) under four different pH conditions (pH D 3, 6, 9, and 12) and under five different NaPH 2 O 2 concentrations (0.0, 0.5, 1.0, 3.0, and 5.0 mM). The relationship among pH, NaPH 2 O 2 concentration, average particle size of Pt nanoparticle, and Pt loading weight was investigated in this study. The average particle size of Pt nanoparticles was in the range of 0.8À3.4 nm and lower in the order; pH12 > pH3 > pH6 > pH9; for example, under the same NaPH 2 O 2 concentrations of 3.0 mM, the particle size of PÀPt/C prepared at pH D 12 and pH D 9 was 1.5 and 0.8 nm, respectively. In addition, Pt loading weight was also lower in the order; pH12 > pH3 > pH6 > pH9. In summary, these results indicated that the pH in the precursor solution affected the performance of NaPH 2 O 2 . These findings would be useful for controlling the particle size of monometallic Pt and Pt-based bimetallic nanoparticles supported on carbon particles for fuel cell applications.

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Radiation induced synthesis of gold/iron-oxide composite nanoparticles using high-energy electron beam

Cited by 79 publications

References 14 publications

Magnetic biosensor technologies for medical applications: a review

Magnetic biosensor technologies for medical applications: a review

Recent advances in surface engineering of superparamagnetic iron oxide nanoparticles for biomedical applications

Influence of pH on performance of sodium phosphinate for decreasing the particle size

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