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. Author manuscript; available in PMC: 2021 Jul 16.
Published in final edited form as: J Phys Chem B. 2021 Feb 16;125(7):1746–1754. doi: 10.1021/acs.jpcb.0c09723

Table 3.

Interprobe Separation, Average Hybridization Time (τsim), Percentage of Hybridization at Each Probea, and Fraction of 2D Hybridization (γ) for Multiprobe Simulations on the CH3− and COO−-SAMsb

hybridizing probe (%)
separation (nm) τsim (μs) 1 2 3 4 5 γ
CH3-SAM 5.0 22.6 ± 0.7 23 23 26 26 2 0.13
10.0 14.4 ± 0.1 22 20 27 23 7 0.20
15.0 15.7 ± 0.4 21 13 24 27 14 0.24
COO−-SAM 5.0 20.6 ± 0.4 15 30 29 24 2 0.03
10.0 15.4 ± 0.2 23 19 28 26 4 0.03
15.0 16.1 ± 0.5 15 19 24 22 20 0.04
a

Labeled 1–5; see Figure 1b.

b

Probes 1–4 are the outer probes of the cluster and should be energetically and sterically equivalent for incoming targets. Probe 5 is at the center of the cluster and shows greatly reduced accessibility dependent on the probe separation.