| Title |
Photoluminescence of rhodamine from nano-confinement inside 3D sculptured coatings |
| Authors |
Grinevičiūtė, Lina ; Huang, Hsin-Hui ; Mu, Haoran ; McMahon-Puce, William ; Chon, James W. M ; Juodkazis, Saulius ; Clayton, Andrew H. A |
| DOI |
10.3390/nano16050296 |
| Full Text |
|
| Is Part of |
Nanomaterials.. MDPI. 2026, vol. 16, is. 5, art. no. 296, p. 1-14.. ISSN 2079-4991 |
| Keywords [eng] |
3D sculptured coatings ; glancing-angle deposition (GLAD) ; fluorescence-lifetime imaging microscopy (FLIM) |
| Abstract [eng] |
The effect of the confinement of fluorophores (rhodamine 6G) in nano-cavities of porous 3D sculptured coatings made by glancing-angle deposition (GLAD) was investigated by fluorescence-lifetime imaging microscopy (FLIM). Shortening of fluorescence/ photoluminescence lifetime by ∼10% was observed from the dye-permeated (in liquid) structure; however, there was no rotational hindrance of dye molecules. When dried, a strong rotational hindrance 89% was observed for the orientation along the ordinary optical axis (slow-axis), and the hindrance was smaller than 57% for the extraordinary direction (fast axis). Light-intensity distribution inside the nano-structure with a form birefringence was numerically modeled using plane-wave illumination and a dipole source. Nanoscale localization of light intensity due to dipole nature I∼1/radius6 and boundary conditions for E-field allows efficient energy deposition inside the region of lower refractive index (nanogaps). |
| Published |
MDPI |
| Type |
Journal article |
| Language |
English |
| Publication date |
2026 |
| CC license |
|
