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Utilization of Inexpensive Carbon-Based Substrates as Platforms for Sensing
Minh Tran1, Ahmad Fallatah2, Alison Whale3
1Department of Mechanical Engineering, Iowa State University, Ames, IA 50011, USA. mhtran@iastate.edu.
Sensors (Basel, Switzerland)
|August 1, 2018
Summary
Flexible gold-coated carbon cloth and paper enable portable Surface Enhanced Raman Spectroscopy (SERS) for detecting analytes like pesticides. This advancement offers improved analyte collection and portability for SERS applications.
Area of Science:
- Materials Science
- Analytical Chemistry
- Spectroscopy
Background:
- Gold (Au) is a key material for Surface Enhanced Raman Spectroscopy (SERS) due to its plasmonic properties, stability, and biocompatibility.
- Traditional SERS substrates use rigid materials like glass or silicon, limiting analyte collection and portability.
Purpose of the Study:
- To investigate flexible substrates, specifically carbon cloth and carbon paper, as alternatives for SERS applications.
- To develop a portable and efficient SERS platform by coating flexible substrates with gold nanostructures.
Main Methods:
- Flexible carbon cloth and carbon paper substrates were coated with gold nanostructures using electrodeposition.
- The performance of the flexible SERS substrates was evaluated using Rhodamine 6G as a model analyte.
- Detection capabilities were further assessed using the pesticide paraoxon on both the flexible substrates and a real sample (apple fruit).
Main Results:
- Successfully fabricated flexible SERS substrates by electrodepositing gold nanostructures onto carbon cloth and carbon paper.
- Demonstrated the effectiveness of these flexible substrates in detecting Rhodamine 6G.
- Achieved detection of the pesticide paraoxon on the flexible SERS substrates, including analysis of a real apple sample.
Conclusions:
- Flexible gold-coated carbon materials offer a promising alternative to rigid substrates for SERS.
- The developed flexible SERS substrates enhance analyte collection efficiency and portability.
- This technology has potential applications in portable sensing and detection of various analytes, including pesticides.
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