研究目的
Designing and fabricating a low-cost flexible pressure sensor using laser scribed GO/RGO periodic structure for electronic skin applications.
研究成果
The fabricated pressure sensor based on periodic structure of GO-rGO demonstrates acceptable response in the range of 1.5–40 kPa, making it suitable for electronic skin applications. The low-cost fabrication technique shows potential for further development in flexible electronics.
研究不足
The sensor's pressure detection limit is up to 40 kPa, beyond which no significant change in resistance is observed. The fabrication technique, while simple and low-cost, may have limitations in terms of scalability and uniformity for large-scale production.
1：Experimental Design and Method Selection:
The sensor was designed using computational modelling through Finite Element Method (FEM) in the COMSOL environment. The fabrication involved a low-cost direct laser writing technique utilizing the laser diode of a DVD drive’s pickup head.
2：Sample Selection and Data Sources:
Graphene oxide (GO) solution was prepared using modified Hummer’s method. Kapton tape was used as the substrate for the sensor.
3：List of Experimental Equipment and Materials:
DVD light scribe drive (SUZUKI SL-188) with IR laser (788 nm) and 5 mW power, transmission electron microscope (TEM)(Philips CM30), scanning electron microscopy (SEM) (MIRA3 TESCAN), X-ray diffraction (XRD) and UV–Visible spectrum of GO sheets were obtained by STOE (STADI P) instrument and PerkinElmer UV–Vis spectrophotometer respectively, Raman spectra were recorded using a dispersive Raman, Thermonicolet (Almega, USA) equipped with a 780 nm(NIR) laser (100–3100 cm?1 Raman shift).
4：Experimental Procedures and Operational Workflow:
The GO layer was deposited on Kapton tape, patterned by laser irradiation, and characterized structurally and functionally.
5：Data Analysis Methods:
The performance of the sensor was evaluated by measuring the electric current in response to applied pressure.
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UV–Vis spectrophotometer
PerkinElmer UV–Vis
PerkinElmer
Obtained the UV–Vis absorption spectrum of GO sheets.
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Raman spectrometer
Thermonicolet (Almega, USA)
Thermonicolet
Recorded the Raman spectra of GO nanosheets.
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potentiostat/galvanostat system
PGSTAT 302N
Autolab
Performed electrical tests (voltage, current and resistance measurement).
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DVD light scribe drive
SUZUKI SL-188
SUZUKI
Used for patterning the sensor by laser irradiation.
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transmission electron microscope
Philips CM30
Philips
Investigated the morphology of GO nanosheets.
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scanning electron microscopy
MIRA3 TESCAN
TESCAN
Used to verify the nanostructure of the surface.
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X-ray diffraction
STOE (STADI P)
STOE
Obtained the XRD spectrum of GO sheets.
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atomic force microscopy
DME DS95 series
DME
Verified the topography of the surface.
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