研究目的
To develop a hydrogel coated fibre grating-based pH sensor for biomedical applications, utilizing Graphene Oxide (GO) to enhance the bonding between the coating and the fibre, and to compare two methods of GO deposition (evaporation and co-electroplating) for their effectiveness in sensor sensitivity and durability.
研究成果
The study successfully developed a hydrogel-coated FBG-based pH sensor with enhanced bonding using GO. The evaporated GO method provided higher sensitivity but weaker bonding, whereas the co-electroplated method offered stronger bonding but lower sensitivity. The findings suggest a trade-off between sensitivity and durability in sensor design.
研究不足
The hydrogel degrades under extreme pH conditions (above 10.0 and below 5.0), limiting the sensor's operational range. The evaporated GO method, while more sensitive, results in weaker bonding to the fibre compared to the co-electroplated method.
1：Experimental Design and Method Selection:
The study involved the development of a pH sensor using a Fibre Bragg Grating (FBG) coated with hydrogel and GO. Two GO deposition methods were compared: evaporation and co-electroplating with copper.
2：Sample Selection and Data Sources:
FBG sensors were used as the base substrate. GO was synthesized using a modified Hummers method.
3：List of Experimental Equipment and Materials:
Equipment included an ultrasonic bath, oven, SEM (Tescan Vega 3 LMU), and an interrogator system (Micron Optics SM125). Materials included graphite, sodium alginate, calcium chloride, and copper plates.
4：5). Materials included graphite, sodium alginate, calcium chloride, and copper plates. Experimental Procedures and Operational Workflow:
4. Experimental Procedures and Operational Workflow: The FBG sensors were coated with GO using either evaporation or co-electroplating, followed by hydrogel coating. The sensors were then tested for pH sensitivity.
5：Data Analysis Methods:
The sensitivity of the sensors was measured by monitoring the Bragg wavelength shift in response to pH changes.
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