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¹³C NMR: ¹H–¹³C Decoupling01:04

¹³C NMR: ¹H–¹³C Decoupling

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The probability of having two carbon-13 atoms next to each other is negligible because of the low natural abundance of carbon-13. Consequently, peak splitting due to carbon-carbon spin-spin coupling is not observed in spectra. However, protons up to three sigma bonds away split the carbon signal according to the n+1 rule, resulting in complicated spectra.
A broadband decoupling technique is used to simplify these complex, sometimes overlapping, signals. Broadband decoupling relies on a...
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Sugar Molecules Detection via C2N Transistor-Based Sensor: First Principles Modeling.

Asma Wasfi1, Sarah Awwad2, Mousa Hussein1

  • 1Department of Electrical and Communication Engineering, College of Engineering, United Arab Emirates University, Al Ain P.O. Box 15551, United Arab Emirates.

Nanomaterials (Basel, Switzerland)
|February 25, 2023
PubMed
Summary
This summary is machine-generated.

A novel field effect transistor (FET) using nitrogenated holey graphene (C2N) accurately detects sugar molecules like glucose. This C2N transistor offers a promising new method for diabetes monitoring and food quality assessment.

Keywords:
C2Nfirst-principlesglucose sensornitrogenated holey graphenenon-equilibrium green’s function (NEGF)

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Area of Science:

  • Materials Science and Nanotechnology
  • Sensor Technology
  • Computational Chemistry

Background:

  • Accurate, real-time detection of sugar molecules is crucial for diabetes management and food quality control.
  • Existing methods may lack the sensitivity or speed required for continuous monitoring.
  • Two-dimensional materials offer unique electronic properties for advanced sensor applications.

Purpose of the Study:

  • To design and test a field effect transistor (FET) sensor based on two-dimensional nitrogenated holey graphene (C2N).
  • To evaluate the sensor's capability for real-time identification of sugar molecules (xylose, fructose, glucose).
  • To investigate the potential of C2N-based sensors for blood glucose monitoring and food quality analysis.

Main Methods:

  • Fabrication of a FET device utilizing a C2N monolayer as the channel between gold electrodes.
  • Implementation of a gate electrode beneath the C2N channel to modulate electronic properties.
  • Application of Density Functional Theory (DFT) combined with Non-Equilibrium Green's Function (NEGF) calculations to study electronic characteristics.

Main Results:

  • The C2N FET exhibited distinct electronic transport characteristics for different sugar molecules.
  • Analysis of work function, density of states, electrical current, and transmission spectrum revealed unique signatures for xylose, fructose, and glucose.
  • The sensor demonstrated high accuracy in differentiating and detecting the target sugar molecules.

Conclusions:

  • The developed C2N transistor-based sensor shows significant promise for accurate and real-time sugar molecule detection.
  • The unique electronic properties of C2N make it a suitable material for advanced glucose sensors and food quality evaluation tools.
  • This work highlights the potential of C2N FETs as a novel platform for sensitive and selective biosensing applications.