Enhanced Near-Infrared\nFluorescence Emission near\na Graphene–Metal Hybrid Structure

Plasmon resonance plays an important role in improving\nthe detection\nof biomolecules, and it is one of the focuses of research to use metal\nplasmon resonance to achieve fluorescence enhancement and to improve\ndetection sensitivity. However, the problems of nondynamic tuning\nand fluorescence quenching of metal plasmon resonance need to be solved.\nGraphene surface plasmon resonance can be dynamically controlled,\nand the graphene adsorption of fluorescent molecules can avoid fluorescence\nquenching and greatly improve the fluorescence emission intensity.\nThe graphene-metal hybrid structure designed in this work can solve\nthe above two problems well, and the plasmon resonance can improve\nthe fluorescence emission efficiency of molecules on the surface of\ngraphene and improve the sensitivity of biological detection. At the\nsame time, graphene nanoribbons in our hybrid structure do not require\npatterning, which greatly lowers the threshold for graphene application\nin biosensing.