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Obliquely Deposited Gold Nanohelices on Lithography-Free Prepared Nanoseeded Surfaces
oleh: Yi-Jun Jen, Wei-Chih Liu, Chih-Yung Hsiao, Po-Cheng Lin, Chia-Liang Yu, Teh-Li Chan
| Format: | Article |
|---|---|
| Diterbitkan: | SpringerOpen 2017-08-01 |
Deskripsi
Abstract A substrate surface on which gold particles are distributed is prepared by annealing an ultra-thin gold film to enable glancing angle deposition. By cooling the substrate and controlling its spin rate, two spiral-like and one screw-like gold nanohelix arrays are grown upon the seeded surfaces. The mean helix radius and pitch length are reduced to 17 and 55 nm, respectively. The g-factor of the three nanohelix arrays is measured here and associated circular dichroism peak blue shifts occur as the gold helices shrink.