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Abstract | Cited by

We present a SERS-active gold nanostructure with built-in electromagnetic hotspots formed by densely packed gold nanoparticles on a gold nanorod. Cy3 labeled stimuli-responsive DNA motifs were introduced to the SERS-active nanostructure. The SERS signals can be switched ON and OFF reversibly in response to external stimuli (pH, metal ions or organic molecules).

Graphical abstract: A bumpy gold nanostructure exhibiting DNA-engineered stimuli-responsive SERS signals

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