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Volumn 122, Issue 38, 2000, Pages 9071-9077

Colloidal Au-enhanced surface plasmon resonance for ultrasensitive detection of DNA hybridization

Author keywords

[No Author keywords available]

Indexed keywords

GOLD; NANOPARTICLE; OLIGONUCLEOTIDE;

EID: 0034721456     PISSN: 00027863     EISSN: None     Source Type: Journal    
DOI: 10.1021/ja001215b     Document Type: Article
Times cited : (1007)

References (71)
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    • note
    • Adding untagged DNA probes (S3), with sequence complementary to the other half of S2, caused an indiscernible angle shift (data not shown). This is not unexpected since the mass change is relatively small, and biomolecules usually have low dielectric constants. 47
  • 47
    • 0343603203 scopus 로고    scopus 로고
    • note
    • Refractive index of protein is approximately 1.45-1.46, while bulk Au is 0.167 + 3.44i. 48
  • 48
    • 0342298289 scopus 로고    scopus 로고
    • (accessed March 1999)
    • http://corndog.chem.wisc.edu/fresnel/fcform.html (accessed March 1999).
  • 49
    • 0343167792 scopus 로고    scopus 로고
    • note
    • Note that a broadening in curve C can also be perceived. This may be attributed to a slight perturbation of the alkanethiol monolayer upon heating the surface. 50,51 However, no discernible particle coverage decrease was observed on the AFM image of the control surface (exposed to the conjugates in the absence of the linking oligos) after increasing the surface temperature. Presumably, the loss of Au particles, i.e., the SPR angle shift, caused by surface perturbation from temperature elevation was negligible.
  • 57
    • 0342298285 scopus 로고    scopus 로고
    • note
    • Surface coverage was obtained by manually counting the number of Au particles present on the captured AFM images. The nonspecific-adsorption was then calculated as the ratio of the number of nonspecifically adsorbed particles to that of the surface with the linking oligonucleotides.
  • 59
    • 0342733278 scopus 로고    scopus 로고
    • (accessed January 2000)
    • http://www.bioimage.com (accessed January 2000).
  • 62
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    • note
    • Note that a 10 nM concentration of oligonucleotides has been detected by the Corn group via imaging SPR under different conditions.
  • 63
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    • Personal communication
    • Corn, R. M. Personal communication.
    • Corn, R.M.1
  • 67
    • 0343167789 scopus 로고    scopus 로고
    • note
    • 2 detection limit can be expected for 45 nm diameter particles. 24 This theoretically corresponds to ∼60 copies of DNA detectable at 50 μm diameter spot size, 68 assuming 100% hybridization efficiency.
  • 68
    • 0342733276 scopus 로고    scopus 로고
    • note
    • The capability of surface plasmon microscopy to detect surface features at sizes much smaller than 50 μm has been widely demonstrated. 69,70


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.