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Physical Characterization of Test GNR Batchesa
| GNR absorbance max (nm) |
length (nm) |
width (nm) |
aspect ratio |
zeta (mV) (before PEG) |
zeta (mV) (after PEG) |
|---|---|---|---|---|---|
| 661 | 43.6 ± 6.0 | 18.0 ± 2.1 | 2.4 | +14.6 | −2.5 |
| 698 | 44.5 ± 3.6 | 15.4 ± 1.7 | 2.9 | +26.4 | −0.1 |
| 756 | 41.4 ± 3.7 | 12.0 ± 1.7 | 3.5 | +29.3 | −8.9 |
The optical resonance of the GNRs becomes increasingly red-shifted as the aspect ratio increases. Exchanging the CTAB surfactant for PEG neutralizes the zeta potential for all three batches.
