In this manuscript, we demonstrate rapid decoration of titania nanotube (TiNT) with noble metals using electrochemical synthesis and its application as a hybrid metal-dielectric spacer and cavity material in surface plasmon-coupled emission (SPCE) platform. Using the metal-dielectric spacer architecture consisting of Pt decorated titania nanotubes, Pt@TiNT, we have achieved remarkable 104-fold fluorescence signal enhancement in the SPCE platform, owing to the combined effect of low plasmon loss of TiNT, increased local field excitation by Pt nanoparticles and increased activity of TiNT by Pt decoration. We have further carried out finite-difference time-domain (FDTD) simulation to compute the Purcell factor (PF) and correlated it with the enhancement obtained from SPCE experiments. Besides, we have also evaluated the effect of Au and Au–Pt decorated TiNT as a plasmonic substrate.

在这份手稿中，我们展示了使用电化学合成的贵金属快速装饰二氧化钛纳米管 (TiNT)及其在表面等离子体耦合发射 (SPCE) 平台中作为混合金属-介电间隔物和腔材料的应用。使用由 Pt 装饰的二氧化钛纳米管 Pt@TiNT 组成的金属-电介质间隔结构，我们在 SPCE 平台上实现了显着的 104 倍荧光信号增强，这是由于低TiNT 的等离子体损失，增加了 Pt 纳米粒子的局部场激发，并通过 Pt 装饰增加了 TiNT 的活性。我们进一步进行了有限差分时域 (FDTD) 模拟来计算珀塞尔因子 (PF) 并将其与从 SPCE 实验中获得的增强相关联。此外，我们还评估了 Au 和 Au-Pt 装饰的 TiNT 作为等离子体基底的效果。