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Self-assembly of a submonolayer of thiolated DNA and mercaptohexanol spacer, as well as the DNA hybridization, could be readily sensed by gold nanoislands deposited on a glass slide by transmission surface plasmon resonance (T-SPR) spectroscopy. The sensitivity of T-SPR dramatically increased by the functionalization of the complementary DNA by 11.7 ± 1.9 nm gold nanoparticles. This enhanced sensitivity is rationalized by the constructive interactions of the gold nanoisland and gold nanoparticle surface plasmon resonances.
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Hutter et al. (2003) studied this question.
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