Au nanoparticles coated with chitosan

Akitoshi Tokumasu; Tomoya Inose; Noriko Yamauchi; Kouichi Nakashima; Masayuki Tokunaga; Chihiro Kato; Keiichiro Hatoyama; Takashi Kamei; Kohsuke Gonda; Yoshio Kobayashi

doi:10.1007/s00396-019-04524-3

Au nanoparticles coated with chitosan

Akitoshi Tokumasu, Tomoya Inose, Noriko Yamauchi, Kouichi Nakashima, Masayuki Tokunaga, Chihiro Kato, Keiichiro Hatoyama, Takashi Kamei, Kohsuke Gonda, Yoshio Kobayashi

Research output: Contribution to journal › Article › peer-review

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Abstract

This paper describes a method of coating metallic gold (Au) nanoparticles with chitosan (CS) shells in an aqueous solution. A colloidal solution of Au nanoparticles with a particle size of 16.5 ± 1.7 nm was prepared by reducing the Au ions (III) with sodium citrate in water at 80 °C. CS coating was achieved in an aqueous solution containing the Au nanoparticles by using CS as a shell source and sodium hydroxide as a pH adjuster at 25 °C. Ultraviolet-visible extinction spectroscopy and transmittance electron microscopy observation revealed that the Au nanoparticles were coated with CS shells. Additionally, the CS shell thickness could be varied in a range up to 2.2 nm by changing the CS concentration during the CS-coating process. [Figure not available: see fulltext.].

Original language	English
Pages (from-to)	1143-1148
Number of pages	6
Journal	Colloid and Polymer Science
Volume	297
Issue number	7-8
DOIs	https://doi.org/10.1007/s00396-019-04524-3
Publication status	Published - 2019 Aug 1

Keywords

Au
Chitosan
Core-shell
Nanoparticle

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10.1007/s00396-019-04524-3

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title = "Au nanoparticles coated with chitosan",

abstract = "This paper describes a method of coating metallic gold (Au) nanoparticles with chitosan (CS) shells in an aqueous solution. A colloidal solution of Au nanoparticles with a particle size of 16.5 ± 1.7 nm was prepared by reducing the Au ions (III) with sodium citrate in water at 80 °C. CS coating was achieved in an aqueous solution containing the Au nanoparticles by using CS as a shell source and sodium hydroxide as a pH adjuster at 25 °C. Ultraviolet-visible extinction spectroscopy and transmittance electron microscopy observation revealed that the Au nanoparticles were coated with CS shells. Additionally, the CS shell thickness could be varied in a range up to 2.2 nm by changing the CS concentration during the CS-coating process. [Figure not available: see fulltext.].",

keywords = "Au, Chitosan, Core-shell, Nanoparticle",

author = "Akitoshi Tokumasu and Tomoya Inose and Noriko Yamauchi and Kouichi Nakashima and Masayuki Tokunaga and Chihiro Kato and Keiichiro Hatoyama and Takashi Kamei and Kohsuke Gonda and Yoshio Kobayashi",

note = "Funding Information: Funding information This work was supported by JSPS KAKENHI Grant Numbers 24310085 and 16H05168. Publisher Copyright: {\textcopyright} 2019, Springer-Verlag GmbH Germany, part of Springer Nature.",

year = "2019",

month = aug,

day = "1",

doi = "10.1007/s00396-019-04524-3",

language = "English",

volume = "297",

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T1 - Au nanoparticles coated with chitosan

AU - Tokumasu, Akitoshi

AU - Inose, Tomoya

AU - Yamauchi, Noriko

AU - Nakashima, Kouichi

AU - Tokunaga, Masayuki

AU - Kato, Chihiro

AU - Hatoyama, Keiichiro

AU - Kamei, Takashi

AU - Gonda, Kohsuke

AU - Kobayashi, Yoshio

N1 - Funding Information: Funding information This work was supported by JSPS KAKENHI Grant Numbers 24310085 and 16H05168. Publisher Copyright: © 2019, Springer-Verlag GmbH Germany, part of Springer Nature.

PY - 2019/8/1

Y1 - 2019/8/1

N2 - This paper describes a method of coating metallic gold (Au) nanoparticles with chitosan (CS) shells in an aqueous solution. A colloidal solution of Au nanoparticles with a particle size of 16.5 ± 1.7 nm was prepared by reducing the Au ions (III) with sodium citrate in water at 80 °C. CS coating was achieved in an aqueous solution containing the Au nanoparticles by using CS as a shell source and sodium hydroxide as a pH adjuster at 25 °C. Ultraviolet-visible extinction spectroscopy and transmittance electron microscopy observation revealed that the Au nanoparticles were coated with CS shells. Additionally, the CS shell thickness could be varied in a range up to 2.2 nm by changing the CS concentration during the CS-coating process. [Figure not available: see fulltext.].

AB - This paper describes a method of coating metallic gold (Au) nanoparticles with chitosan (CS) shells in an aqueous solution. A colloidal solution of Au nanoparticles with a particle size of 16.5 ± 1.7 nm was prepared by reducing the Au ions (III) with sodium citrate in water at 80 °C. CS coating was achieved in an aqueous solution containing the Au nanoparticles by using CS as a shell source and sodium hydroxide as a pH adjuster at 25 °C. Ultraviolet-visible extinction spectroscopy and transmittance electron microscopy observation revealed that the Au nanoparticles were coated with CS shells. Additionally, the CS shell thickness could be varied in a range up to 2.2 nm by changing the CS concentration during the CS-coating process. [Figure not available: see fulltext.].

KW - Au

KW - Chitosan

KW - Core-shell

KW - Nanoparticle

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DO - 10.1007/s00396-019-04524-3

M3 - Article

AN - SCOPUS:85068238113

SN - 0303-402X

VL - 297

SP - 1143

EP - 1148

JO - Colloid and Polymer Science

JF - Colloid and Polymer Science

IS - 7-8

ER -

Au nanoparticles coated with chitosan

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Keywords

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