Rai Bebeto, Sarma Prasad V, Srinivasan Venkatesh, Shaijumon Manikoth M, Ramamurthy Sai Sathish
STAR Laboratory, Department of Chemistry, Sri Sathya Sai Institute of Higher Learning, Prasanthi Nilayam, Puttaparthi, Anantapur, Andhra Pradesh 515134, India.
School of Physics, Indian Institute of Science Education and Research Thiruvananthapuram, Maruthamala PO, Thiruvananthapuram, Kerala 695551, India.
Langmuir. 2021 Feb 9;37(5):1954-1960. doi: 10.1021/acs.langmuir.0c03465. Epub 2021 Jan 25.
Enhancement of fluorescence emission from single-photon quantum emitters on plasmonic nanomaterials using surface plasmon-coupled emission (SPCE) platforms has seen significant advancements. In parallel, there has also been an exponential rise in applications involving two-dimensional (2D) transition-metal dichalcogenides (TMDs) that exhibit unique exciton-plasmon interactions. Although both these Frontier research areas have impacted the development of sensor and sensing technologies, no study coalesces these two arenas for translational applications. In this work, we use thin WS nanosheets for realizing 1000-fold fluorescence enhancement on the SPCE platform. Structure-dependent fluorescence enhancement exhibited by WS provides new insight into the use of TMDs and exciton-plasmon coupling in SPCE substrates. Cellphone-based detection of the emitting dipole is another unique aspect of this work that presents a low-cost alternative in comparison with high-end detectors.
利用表面等离子体耦合发射（SPCE）平台增强等离子体纳米材料上单光子量子发射器的荧光发射已经取得了显著进展。与此同时，涉及二维（2D）过渡金属二卤化物（TMD）且表现出独特激子 - 等离子体相互作用的应用也呈指数级增长。尽管这两个前沿研究领域都对传感器和传感技术的发展产生了影响，但尚无研究将这两个领域结合用于转化应用。在这项工作中，我们使用薄的WS纳米片在SPCE平台上实现了1000倍的荧光增强。WS所展示的结构依赖性荧光增强为在SPCE基板中使用TMD和激子 - 等离子体耦合提供了新的见解。基于手机检测发射偶极子是这项工作的另一个独特之处，与高端探测器相比，它提供了一种低成本的替代方案。
