Abstract
The surface plasmon resonance (SPR) technique is a powerful method to detect chemical molecules. Fluorescent spectroscopy is a subject of great interest in the field of material science and biology. Recently, some optical sensors, based on plasmonic properties of nanomaterial, were introduced to enhance the investigation of the interaction of molecular while detecting the low concentration of molecular. The surface plasmon-coupled emission (SPCE) technique is a merit and accurate method to evaluate the interaction of nanomaterials and molecular. SPCE is based on fluorescence properties of interest molecule, and the surface plasmon enhances the fluorescence signal. According to SPR theory, the condition of excitation of fluorophore could be used in obtaining the SPCE signal. SPCE can be used to detect toxic chemicals and investigate the human molecular. In this review, the theory, experimental setup, condition of SPCE, and role of metal nanoparticles in SPCE were reviewed. In the end, the application of SPCE was presented for detection and monitoring the chemical material, heavy metal, and biologic molecules.
Highlights
Surface plasmon resonance (SPR) is a unique phenomenon due to its charge density oscillation at the interface of metal and dielectric medium
This means that the electrons transfer between two singlet states during 10−8 s (0.1 ns) with the radiation process defined by radiative decay parameter (Figure 1)
The Surface plasmon-coupled emission (SPCE) response depends on fluorophore emission and the fluorescence emission enhancement is a subject of great interest in sensor and biosensing with high sensitivity
Summary
Surface plasmon resonance (SPR) is a unique phenomenon due to its charge density oscillation at the interface of metal and dielectric medium. Surface plasmon can excite the fluorophores, such as nanomaterial and quantum dots [3]. This technique is based on highly sensitive sensors, probes, and new devices for the detection and interaction of molecules with fluorophores. On the other hand, when the molecules bind to fluorophores, there will be a shift in the energy in the fluorescence spectrum or the surface plasmon wave. This is the basis of detection of chemical low-concentrations and investigations of biomolecular interaction. The plasmonic and fluorescence properties of nanomaterial, SPR theory, the concept of SPCE, and the sensor application of SPCE using nanomaterial are presented
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