Kim Misuk, Kim Jiyoun, Ju Seongcheol, Kim Hyeonwoo, Jung Incheol, Jung Jong Hoon, Lee Gil Sun, Hong Young Ki, Park Dong Hyuk, Lee Kyu-Tae
Department of Physics, Inha University, Incheon 22212, Republic of Korea.
Department of Chemical Engineering, Program in Biomedical Science and Engineering, Inha University, Incheon 22212, Republic of Korea.
Nanomaterials (Basel). 2023 Feb 23;13(5):825. doi: 10.3390/nano13050825.
An enhancement of the local electric field at the metal/dielectric interface of hybrid materials due to the localized surface plasmon resonance (LSPR) phenomenon plays a particularly important role in versatile research fields resulting in a distinct modification of the electrical, as well as optical, properties of the hybrid material. In this paper, we succeeded in visually confirming the LSPR phenomenon in the crystalline tris(8-hydroxyquinoline) aluminum (Alq) micro-rod (MR) hybridized with silver (Ag) nanowire (NW) in the form of photoluminescence (PL) characteristics. Crystalline Alq MRs were prepared by a self-assembly method under the mixed solution of protic and aprotic polar solvents, which could be easily applied to fabricate hybrid Alq/Ag structures. The hybridization between the crystalline Alq MRs and Ag NWs was confirmed by the component analysis of the selected area electronic diffraction attached to high-resolution transmission electron microscope. Nanoscale and solid state PL experiments on the hybrid Alq/Ag structures using a lab-made laser confocal microscope exhibited a distinct enhancement of the PL intensity (approximately 26-fold), which also supported the LSPR effects between crystalline Alq MRs and Ag NWs.
由于局域表面等离子体共振（LSPR）现象，杂化材料金属/电介质界面处的局部电场增强，这在多个研究领域中发挥着特别重要的作用，导致杂化材料的电学和光学性质发生显著改变。在本文中，我们通过光致发光（PL）特性成功地直观证实了与银（Ag）纳米线（NW）杂交的结晶三（8 - 羟基喹啉）铝（Alq）微棒（MR）中的LSPR现象。结晶Alq MRs是在质子性和非质子性极性溶剂的混合溶液中通过自组装方法制备的，这种方法可以很容易地用于制造杂化Alq/Ag结构。通过高分辨率透射电子显微镜附带的选区电子衍射的成分分析证实了结晶Alq MRs和Ag NWs之间的杂交。使用实验室自制的激光共聚焦显微镜对杂化Alq/Ag结构进行的纳米级和固态PL实验显示PL强度有明显增强（约26倍），这也支持了结晶Alq MRs和Ag NWs之间的LSPR效应。
