Figure 1. a) Representation of the activation of Au NP 1 through the electrochemically activated release of metal ions from an electrode. b) Initial rate (vinit) of HPNPP transphosphorylation as a function of the concentration of Cu2+ (red) or Cd2+ (green). The gray bar marks the difference in reactivity of Au NP 1 (vinit=8.6( 1.9) 10 10ms 1, background), Au NP 1·Cu2+ (vinit=7.7( 0.9) 10 9ms 1), Au NP 1·Cd2+ (vinit=2.0( 0.3) 10 9ms 1) when [TACN]/[M2+] ratio is 1:1. Conditions: [TACN]=20 mm, [HPNPP]=1 mm, [HEPES]=10 mm, pH 7.0, 25 8C.
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