Journal
CHEMICAL COMMUNICATIONS
Volume 50, Issue 41, Pages 5480-5483Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4cc01335b
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Funding
- National 973 Basic Research Program [2012CB933800]
- National Natural Science Foundation of China [21327902, 21035002, 21275070, 21275071, 21205059]
- National Science Fund for Creative Research Groups [21121091]
- Program for New Century Excellent Talents in University [NCET-11-0237]
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Spectral shift of localized plasmon resonance scattering of guanine-rich DNA modified single Au nanoparticles is observed under a dark field microscope equipped with a spectrometer. The spectra continuously red-shift with the conformational change of the guanine-rich DNA upon associating with K+, hemin and the biocatalytic growth of the polymer. The scattering spectrum of single nanoparticles is proved to be sensitive both to a subtle conformational change and the biocatalysis process. 20mMK(+) or 100 mu MH2O2 can trigger a detectable peak shift. The present study paves a new and efficient way to extract chemical information from micro/nanospace.
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