illustrate selective heating fig3 c shows the a 260 with the rfmf on and off for a fixed concentration of m as n was added a 260 on and off values increased linearly but the difference aa 260 remained constant samples of increasing concentration of m showed u03b4a 260 increasing with the concentration not shown these experiments indicated that induction heating of a nanocrystal on m is sufficiently localized in that n is unaffected a third test of selectivity of rfmf dehybridization was evident in the purification of gold linked x from unlabeled x where a fraction of gold linked oligomers increased with successive dehybridization by rfmf fig3 d shows the fluorescence spectra of a sample after one and two rfmf dehybridizations each normalized to thermal dehybridization by 70 u00b0 c which provided the total amount of oligomers present the percentage of molecules dehybridized by rfmf increased with the second cycle indicating that the rfmf preferentially dehybridizes oligomers linked with gold nanocrystals these experiments showed that induction heating of the nanocrystal is sufficiently localized such that surrounding molecules are not substantially affected these experiments also demonstrate the use of inductive coupling to a covalently bound nanocrystal antenna to reversibly dehybridize double stranded dna on the time scale of seconds permitting a switch like control in solution furthermore induction heating.