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Related Concept Videos

IR and UV–Vis Spectroscopy of Aldehydes and Ketones01:29

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Infrared spectroscopy, also known as vibrational spectroscopy, is mainly used to determine the types of bonds and functional groups in molecules. In aldehydes and ketones, the carbonyl (C=O) bond shows an absorption around 1710 cm-1. The C=O bond vibration of an aldehyde occurs at lower frequencies than that of a ketone. In addition to the C=O absorption in an aldehyde, the aldehydic C–H bond also gives two peaks in the 2700–2800 cm-1 range. This absorption, coupled with the...
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NMR Spectroscopy and Mass Spectrometry of Aldehydes and Ketones01:15

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In aldehydes, the hydrogen atom connected to the carbonyl carbon helps distinguish aldehydes from other carbonyl compounds using ¹H NMR spectroscopy. The closeness of aldehydic hydrogen to the electrophilic carbonyl carbon highly deshields the hydrogen atom causing its signal to appear around 10 ppm in the ¹H NMR spectra. α hydrogens split the aldehydic proton signal, which helps identify the number of α hydrogens in the molecule. For instance, one α hydrogen creates a...
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A Label-free Technique for the Spatio-temporal Imaging of Single Cell Secretions
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An Ultrasensitive Plasmonic Nanosensor for Aldehydes.

Meng Li, Lei Shi1, Tao Xie

  • 1Shanghai Qingpu Water Authority , 35 Xidayingangyi Road, Shanghai, 201799, P. R. China.

ACS Sensors
|July 21, 2017
PubMed
Summary

This study presents a novel gold-silver core-shell nanoparticle sensor for detecting glucose. The ultrasensitive plasmonic nanosensor demonstrates high specificity and anti-interference, showing promise for clinical blood glucose monitoring.

Keywords:
anti-interferenceglucose sensornanoparticlesplasmonicultrasensitive

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Rapid Nanoprobe Signal Enhancement by In Situ Gold Nanoparticle Synthesis
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Area of Science:

  • Nanotechnology
  • Analytical Chemistry
  • Biomedical Sensing

Background:

  • Glucose detection is crucial, requiring sensitive and interference-resistant biosensors.
  • Aldehyde compounds, including glucose, react with Tollens' reagent.
  • Gold nanoparticles can serve as a core for novel nanostructures.

Purpose of the Study:

  • To develop a highly sensitive and specific plasmonic nanosensor for aldehyde detection.
  • To utilize the formation of gold-silver core-shell nanoparticles for sensing applications.
  • To evaluate the sensor's performance in detecting blood glucose in biological samples.

Main Methods:

  • Formation of gold-silver (Au@Ag) core-shell nanoparticles via reduction of silver ions on gold nanoparticle surfaces.
  • Utilizing the reaction between glucose and Tollens' reagent to induce nanoparticle transformation.
  • Employing in situ surface plasmon resonance scattering spectra for detection and analysis.

Main Results:

  • Successfully synthesized Au@Ag core-shell nanoparticles, leading to a direct wavelength shift.
  • Developed a plasmonic nanosensor with excellent sensitivity and specificity for aldehyde detection.
  • Demonstrated successful application of the sensor for detecting blood glucose in mouse serum with good anti-interference ability.

Conclusions:

  • The developed Au@Ag core-shell nanoparticle-based plasmonic nanosensor offers a sensitive and specific method for aldehyde detection.
  • The sensor shows significant potential for accurate and reliable blood glucose monitoring in clinical settings.
  • This approach provides a promising foundation for future advancements in biosensing technology.