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Surface Enhanced Raman Spectroscopy Detection of Biomolecules Using EBL Fabricated Nanostructured Substrates
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Atomically Thin TaSe2 Film as a High-Performance Substrate for Surface-Enhanced Raman Scattering.

Yuancai Ge1, Fei Wang2, Ying Yang1

  • 1School of Biomedical Engineering, School of Ophthalmology and Optometry, Wenzhou Medical University, Xueyuan Road 270, Wenzhou, 325027, China.

Small (Weinheim an Der Bergstrasse, Germany)
|March 5, 2022
PubMed
Summary
This summary is machine-generated.

Atomically thin tantalum diselenide (TaSe2) nanosheets demonstrate exceptional surface-enhanced Raman scattering (SERS) for detecting molecules like rhodamine 6G. This 2D material shows promise for sensitive clinical diagnostics, including bilirubin detection for jaundice.

Keywords:
2D materialsTaSe 2clinical diagnosissurface-enhanced Raman spectroscopy

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Spectroscopy

Background:

  • Surface-enhanced Raman scattering (SERS) is a powerful technique for molecular detection.
  • Atomically thin 2D materials offer unique properties for SERS substrates.
  • Tantalum diselenide (TaSe2) has not been previously explored for SERS applications.

Purpose of the Study:

  • To synthesize and characterize atomically thin TaSe2 nanosheets.
  • To investigate the SERS performance of TaSe2 for detecting Raman-active molecules.
  • To elucidate the mechanism behind TaSe2's SERS enhancement and explore its diagnostic potential.

Main Methods:

  • Synthesis of 2-3 layer TaSe2 nanosheets (2.5 cm diameter).
  • Characterization using spectrum analysis.
  • Theoretical investigation using density functional theory (DFT).
  • Detection of rhodamine 6G and bilirubin in biological samples.

Main Results:

  • Achieved a limit of detection of 10^-10 M for rhodamine 6G.
  • Identified large adsorption energy and high electron density near the Fermi level as key to chemical enhancement.
  • Demonstrated sensitive detection of bilirubin in serum and urine samples.

Conclusions:

  • Atomically thin TaSe2 exhibits excellent SERS performance.
  • The mechanism involves significant chemical enhancement due to electronic properties.
  • TaSe2-based SERS substrates hold potential for clinical diagnostics, such as jaundice detection in newborns.