Table 1. Spectral, Sensing, and Morphological Properties for Each Particle Typea.
| particle type (w/vendor-specified dimensions) | av initial peak location (nm) | av plasmon line width (nm) | av SH-PEG2k peak shift (nm) | av measd length (nm) | av measd width (nm) | av measd aspect ratio |
|---|---|---|---|---|---|---|
| GNS (50 nm) | 554.1 ± 9.3 (1.7%CV) | 54.6 ± 11.4 (20.9%CV) | 2.1 ± 0.9 (42.9%CV) | 46.1 ± 3.2 (6.9%CV) | 44.1 ± 3.1 (7.1%CV) | 1.1 ± 0.1 (9.1%CV) |
| N = 49 | N = 49 | N = 21 | N = 30 | N = 30 | N = 30 | |
| (λmsLSPR – λabs = 25.1 nm) | ||||||
| GNR (60 × 40 nm) | 577.7 ± 11.1 (1.9%CV) | 61.7 ± 5.7 (9.2%CV) | 2.7 ± 0.7 (25.8%CV) | 59.1 ± 8.7 (14.8%CV) | 40.1 ± 2.8(7.1%CV) | 1.5 ± 0.2 (13.3%CV) |
| N = 36 | N = 36 | N = 18 | N = 33 | N = 33 | N = 33 | |
| (λmsLSPR – λabs = 12.7 nm) | ||||||
| GNR (57 × 25 nm) | 615.1 ± 12.9(2.1%CV) | 58.7 ± 3.5 (5.9%CV) | 4.5 ± 0.9 (20.0%CV) | 50.9 ± 4.7 (9.3%CV) | 26.0 ± 1.7 (6.6%CV) | 2.0 ± 0.1 (5.0%CV) |
| N = 44 | N = 44 | N = 26 | N = 21 | N = 21 | N = 21 | |
| (λmsLSPR – λabs = 11.1 nm) | ||||||
| GNR (75 × 25 nm) | 689.8 ± 34.0 (4.9%CV) | 56.5 ± 2.5 (4.5%CV) | 6.2 ± 0.8 (12.9%CV) | 75.0 ± 6.3 (8.4%CV) | 27.8 ± 1.2 (4.4%CV) | 2.7 ± 0.3 (11.1%CV) |
| N = 32 | N = 32 | N = 16 | N = 29 | N = 29 | N = 29 | |
| (λmsLSPR – λabs = 0.8 nm) | ||||||
| GNR (87 × 25 nm) | 765.7 ± 42.6 (5.6%CV) | 64.5 ± 6.3 (9.8%CV) | 3.5 ± 1.2 (34.3%CV) | 103.3 ± 11.3 (10.9%CV) | 32.0 ± 2.9 (9.0%CV) | 3.3 ± 0.5 (15.2%CV) |
| N = 39 | N = 39 | N = 9 | N = 35 | N = 35 | N = 35 | |
| (λmsLSPR – λabs = –29.3 nm) | ||||||
| GNBP (105 × 35 nm) | 778.3 ± 33.8 (4.3%CV) | 63.9 ± 5.0 (7.8%CV) | 9.2 ± 0.9 (9.8%CV) | 96.8 ± 2.4 (2.5%CV) | 32.7 ± 1.4 (4.4%CV) | 3.0 ± 0.1 (3.3%CV) |
| N = 12 | N = 12 | N = 12 | N = 25 | N = 25 | N = 25 | |
| (λmsLSPR – λabs = –8.7 nm) | ||||||
| GNBP (100 × 30 mn nm) | 754.4 ± 26.9 (3.6%CV) | 66.9 ± 6.0 (9.0%CV) | 10.2 ± 1.6 (15.7%CV) | 77.3 ± 7.5 (9.7%CV) | 29.8 ± 3.5 (11.6%CV) | 2.6 ± 0.4 (15.4%CV) |
| N = 64 | N = 64 | N = 11 | N = 40 | N = 40 | N = 40 | |
| (λmsLSPR – λabs = –0.2 nm) | ||||||
| aged GNBP (100 × 30 nm)* | 806.5 ± 20.0 (2.5%CV) | 77.4 ± 9.3 (12.0%CV) | 3.7 ± 4.0 (108.1%CV) | 125.9 ± 6.8 (5.4%CV) | 42.8 ± 3.4 (7.9%CV) | 3.0 ± 0.2 (6.7%CV) |
| N = 37 | N = 37 | N = 8 | N = 64 | N = 64 | N = 64 | |
| (λmsLSPR – λabs = –10.5 nm) |
a
The average value, standard deviation, and percent coefficient of variation (% CV) are shown for the single-particle data. Lengths, widths, and aspect ratios were collected for morphologically intact nanoparticles.