Misc.

Jul, 2005

SPR sensor chip for detection of small molecules using molecularly imprinted polymer with embedded gold nanoparticles

ANALYTICAL CHEMISTRY
  • J Matsui
  • ,
  • K Akamatsu
  • ,
  • N Hara
  • ,
  • D Miyoshi
  • ,
  • H Nawafune
  • ,
  • K Tamaki
  • ,
  • N Sugimoto

Volume
77
Number
13
First page
4282
Last page
4285
Language
English
Publishing type
DOI
10.1021/ac050227i
Publisher
AMER CHEMICAL SOC

Molecularly imprinted polymer gel with embedded gold nanoparticle was prepared on a gold substrate of a chip for a surface plasmon resonance (SPR) sensor for fabricating an SPR sensor sensitive to a low molecular weight analyte. The sensing is based on swelling of the imprinted polymer gel that is triggered by an analyte binding event within the polymer gel. The swelling causes greater distance between the gold nanoparticles and substrate, shifting a dip of an SPR curve to a higher SPR angle. The polymer synthesis was conducted by radical polymerization of a mixture of acrylic acid, N-isopropylacrylamide, N,N'-methylenebisacrylamide, and gold nanoparticles in the presence of dopamine as model template species on a sensor chip coated with allyl mercaptan. The modified sensor chip showed an increasing SPR angle in response to dopamine concentration, which agrees with the expected sensing mechanism. Furthermore, the gold nanoparticles were shown to be effective for enhancing the signal intensity (the change of SPR angle) by comparison with a sensor chip immobilizing no gold nanoparticles. The analyte binding process and the consequent swelling appeared to be reversible, allowing one the repeated use of the presented sensor chip.

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Link information
DOI
https://doi.org/10.1021/ac050227i
CiNii Articles
http://ci.nii.ac.jp/naid/80017394212
PubMed
https://www.ncbi.nlm.nih.gov/pubmed/15987138
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000230270800069&DestApp=WOS_CPL
ID information
  • DOI : 10.1021/ac050227i
  • ISSN : 0003-2700
  • CiNii Articles ID : 80017394212
  • Pubmed ID : 15987138
  • Web of Science ID : WOS:000230270800069

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