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Area of Science:

  • Nanomaterials Science
  • Biomedical Engineering
  • Analytical Chemistry

Background:

  • Two-dimensional layered nanomaterials like WS2 and MoS2 are used in biosensors.
  • Current biosensors primarily use single-stranded DNA (ssDNA) as probe biomolecules.
  • Novel probe biomolecules are needed to expand biosensor capabilities.

Purpose of the Study:

  • To develop novel WS2- and MoS2-based biosensing platforms using peptides as probe biomolecules.
  • To investigate the interaction of WS2 and MoS2 nanosheets with amino acids and peptides.
  • To establish a sensitive and specific assay for collagen detection.

Main Methods:

  • Construction of WS2 and MoS2 based biosensing platforms with Arg-rich peptide probes.
  • Demonstration of fluorescence quenching by WS2 and MoS2 nanosheets.
  • Observation of fluorescence recovery upon hybridization with target collagen peptide sequence.

Main Results:

  • WS2 and MoS2 nanosheets exhibit distinct adsorption for Arg-rich peptides, quenching their fluorescence.
  • Collagen peptide detection via fluorescence recovery with high specificity.
  • WS2-based platform shows sensitive, specific detection of collagen biomarkers in complex biological fluids.

Conclusions:

  • WS2 and MoS2 based biosensors can be successfully developed using non-ssDNA peptide probes.
  • This approach opens opportunities for novel multifunctional biosensing platforms.
  • Potential for wide-ranging applications in the biomedical field.