Fabrication of novel chitosan nanofiber/gold nanoparticles composite towards improved performance for a cholesterol sensor
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作者:
Gomathi, Palanisamy
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Kyungpook Natl Univ, Dept Text Syst Engn, Taegu 702701, South KoreaKyungpook Natl Univ, Dept Text Syst Engn, Taegu 702701, South Korea
Gomathi, Palanisamy
[1
]
Ragupathy, Dhanusuraman
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Kyungpook Natl Univ, Dept Chem Engn, Taegu 702701, South KoreaKyungpook Natl Univ, Dept Text Syst Engn, Taegu 702701, South Korea
Ragupathy, Dhanusuraman
[2
]
Choi, Jin Hyun
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Kyungpook Natl Univ, Dept Adv Organ Mat Sci & Engn, Taegu 702701, South KoreaKyungpook Natl Univ, Dept Text Syst Engn, Taegu 702701, South Korea
Choi, Jin Hyun
[3
]
Yeum, Jeong Hyun
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Kyungpook Natl Univ, Dept Adv Organ Mat Sci & Engn, Taegu 702701, South KoreaKyungpook Natl Univ, Dept Text Syst Engn, Taegu 702701, South Korea
Yeum, Jeong Hyun
[3
]
Lee, Soo Chool
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Kyungpook Natl Univ, Dept Chem Engn, Taegu 702701, South KoreaKyungpook Natl Univ, Dept Text Syst Engn, Taegu 702701, South Korea
Lee, Soo Chool
[2
]
Kim, Jae Chang
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Kyungpook Natl Univ, Dept Chem Engn, Taegu 702701, South KoreaKyungpook Natl Univ, Dept Text Syst Engn, Taegu 702701, South Korea
Kim, Jae Chang
[2
]
Lee, Sang Hak
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Kyungpook Natl Univ, Dept Chem, Taegu 702701, South KoreaKyungpook Natl Univ, Dept Text Syst Engn, Taegu 702701, South Korea
Lee, Sang Hak
[4
]
Do Ghim, Han
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Kyungpook Natl Univ, Dept Text Syst Engn, Taegu 702701, South Korea
Kyungpook Natl Univ, Dept Adv Organ Mat Sci & Engn, Taegu 702701, South KoreaKyungpook Natl Univ, Dept Text Syst Engn, Taegu 702701, South Korea
Do Ghim, Han
[1
,3
]
机构:
[1] Kyungpook Natl Univ, Dept Text Syst Engn, Taegu 702701, South Korea
[2] Kyungpook Natl Univ, Dept Chem Engn, Taegu 702701, South Korea
[3] Kyungpook Natl Univ, Dept Adv Organ Mat Sci & Engn, Taegu 702701, South Korea
[4] Kyungpook Natl Univ, Dept Chem, Taegu 702701, South Korea
A novel amperometric cholesterol biosensor was fabricated by the immobilization of ChOx (cholesterol oxidase) onto the chitosan nanofibers/gold nanoparticles (designated as CSNFs/AuNPs) composite network (NW). The fabrication involves preparation of chitosan nanofibers (CSNFs) and subsequent electrochemical loading of gold nanoparticles (AuNPs). Field emission scanning electron microscopy (FE-SEM) was used to investigate the morphology of CSNFs (sizes in the range of similar to 50-100 nm) and spherical AuNPs. Cyclic voltammetry, hydrodynamic voltammetry and amperometry were used to examine the performance of CSNF-AuNPs/ChOx biosensor. The CSNF-AuNPs/ChOx biosensor exhibited a wide linear response to cholesterol (concentration range of 1-45 mu M), good sensitivity (1.02 mu A/mu M). low response time (similar to 5 s) and excellent long term stability. The combined existence of AuNPs within CSNFs NW provides the excellent performance of the biosensor towards the electrochemical detection of cholesterol. (C) 2010 Elsevier B.V. All rights reserved.
机构:
Kyungpook Natl Univ, Dept Chem, Grad Sch, Taegu 702701, South Korea
Nano Pract Applicat Ctr, Taegu 704801, South KoreaKyungpook Natl Univ, Dept Chem, Grad Sch, Taegu 702701, South Korea
Lee, Kwang-Pill
Ragupathy, Dhanusuraman
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Kyungpook Natl Univ, Dept Chem, Grad Sch, Taegu 702701, South KoreaKyungpook Natl Univ, Dept Chem, Grad Sch, Taegu 702701, South Korea
机构:
Kyungpook Natl Univ, Dept Chem, Grad Sch, Taegu 702701, South Korea
Nano Pract Applicat Ctr, Taegu 704801, South KoreaKyungpook Natl Univ, Dept Chem, Grad Sch, Taegu 702701, South Korea
Lee, Kwang-Pill
Ragupathy, Dhanusuraman
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Kyungpook Natl Univ, Dept Chem, Grad Sch, Taegu 702701, South KoreaKyungpook Natl Univ, Dept Chem, Grad Sch, Taegu 702701, South Korea