Recently, researcher Yang liangbao and others of liu jinhuai research group of intelligent institute introduced up-conversion luminescent materials into surface-enhanced Raman spectroscopy (SERS) research, and realized the SERS detection with high sensitivity under long wavelength and low energy laser, which was of great significance to the application of SERS technology in practical detection. The results have been published in materials chemistry A and analysts of the royal society of chemistry.
In recent years, SERS technology has attracted much attention due to its ability to conduct non-destructive and highly sensitive fingerprint identification and detection, which has been widely applied in various basic research fields. However, how to develop a SERS base so that it can be better applied to practical detection and monitoring research is still a great challenge.
To solve the above problems, Dr. Honglin liu and other researchers synthesized the up-conversion material and noble metal composite materials NaYF4:Yb, [email protected] and NaYF4:Yb, [email protected]@ag through a simple method. Using up-conversion materials NaYF4:Yb and Er, the near-infrared light was converted to commonly used visible light to achieve super-sensitive SERS detection and surface plasma-catalyzed reaction under near-infrared laser, and the mechanism of highly sensitive detection of compound SERS substrate under near-infrared laser was clarified through a series of comparative experiments. The researchers obtained another compound SERS substrate (NaYF4:Yb,Tm @[email protected]) by changing the luminescence center of the up-conversion material, and successfully realized the photocatalytic degradation of titanium dioxide under non-ultraviolet light. Meanwhile, SERS technology was used to monitor the photodegradation reaction process of each photocatalyst under different wavelength monochrome laser, which provided direct evidence for NaYF4:Yb,Tm @[email protected] photocatalytic degradation reaction under non-ultraviolet light, and also provided a new direction for SERS application.
The research was supported by the national key scientific instrument and equipment development task, the national key scientific research program nanometer project and the national natural science foundation of China.
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