研究目的
To develop a novel flexible electrochemical sensor for sensitive detection of trans-resveratrol (TRA) molecules in red wines using laser-induced graphene (LIG) technique.
研究成果
The fabricated LIPG-based electrochemical sensor exhibits outstanding electrocatalytic performance towards TRA molecule, showing a good linear association within the concentration of TRA ranging from 0.2 to 50 μmol L?1. The sensor was successfully applied for the TRA evaluation in red wines, providing a promising analysis method for active compounds in food or environment samples.
研究不足
The detecting process of this sensor relies on the electrochemical reaction cell, and the volumes of the detecting solution are too large.
1：Experimental Design and Method Selection:
The study employed a direct laser-induced graphene (LIG) technique to transform commercial Kapton tape into three-dimensional (3D) porous graphene for the electrochemical sensor. A 'double layer' strategy (Kapton/polyimide) was used to obtain LIG with undamaged shape and excellent electrical properties.
2：Sample Selection and Data Sources:
TRA was obtained from Sigma-Aldrich. Red wines and grape samples were purchased for real sample analysis.
3：List of Experimental Equipment and Materials:
PI film and Kapton tape from Dupont TM, laser scribing micromachining system (Nano Pro-III), electrochemical workstation (CHI 760E), SEM (SU8010), Raman microscope system (LabRAM HR Evolution), HPLC system (Waters 2695).
4：5). Experimental Procedures and Operational Workflow:
4. Experimental Procedures and Operational Workflow: The LIPG electrode was fabricated using laser direct writing device. The electrode was activated by cyclic voltammetry in PBS. DPV response was recorded for TRA detection.
5：Data Analysis Methods:
The electrochemical behavior of TRA on the LIPG electrode was investigated. The effective electroactive area was calculated using the Randles–Sevcik equation.
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SEM
SU8010
Hitachi
Used to record the morphology of LIG.
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Kapton tape
Dupont TM
Used as a substrate for the laser-induced graphene (LIG) technique to create the electrochemical sensor.
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PI film
Dupont TM
Used in the 'double layer' strategy with Kapton tape to obtain LIG with undamaged shape and excellent electrical properties.
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laser scribing micromachining system
Nano Pro-III
Tianjin Jiayin Nanotechnology Co., Ltd.
Used for the laser-induced process to transform Kapton tape into three-dimensional (3D) porous graphene.
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electrochemical workstation
CHI 760E
Shanghai CH Instruments
Used for electrochemical analysis.
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Raman microscope system
LabRAM HR Evolution
Horiba Jobin Yvon
Used to measure Raman spectra of the LIG.
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HPLC system
Waters 2695
Used for the determination of TRA levels in red wines.
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