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Ultrasensitive Detection of Biomarkers by Using a Molecular Imprinting Based Capacitive Biosensor
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Hydrogen bonding sewing interface.

Zhenxing Cao1,2, Zhigong Song3, Fengzhi Liang2

  • 1Department of Materials Engineering, Changshu Institute of Technology 99 Nansanhuan Rd. Changshu Jiangsu 215500 P. R. China.

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|May 6, 2022
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Summary
This summary is machine-generated.

Measuring weak interfacial sliding resistance (ISR) is challenging. This study precisely quantifies ISR from hydrogen bonding and van der Waals forces, revealing hydrogen bonds significantly enhance interfacial strength.

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Mechanical Engineering

Background:

  • Quantifying strong forces from covalent bonds is straightforward.
  • Weak interfacial sliding resistance (ISR) from hydrogen bonding or van der Waals (vdW) forces is difficult to measure accurately.
  • Understanding interfacial interactions is crucial for material performance.

Purpose of the Study:

  • To precisely quantify and distinguish interfacial interactions between carbon fibers and substrates.
  • To measure ISR governed by hydrogen bonding versus vdW forces.
  • To explore the potential of hydrogen bonding in enhancing interfacial strength.

Main Methods:

  • Development and utilization of an in-house nanomechanical testing system.
  • Precise measurement of interfacial sliding resistance (ISR).
  • Distinguishing interactions based on hydrogen bonding and vdW forces.

Main Results:

  • The ISR for vdW-dominated interfaces was measured at 3.55 ± 0.50 μN mm⁻¹.
  • The ISR significantly increased to 157.86 ± 44.18 μN mm⁻¹ when hydrogen bonding bridged the interface.
  • Hydrogen bonding demonstrated a substantially greater contribution to interfacial strength compared to vdW forces.

Conclusions:

  • Hydrogen bonding is a powerful mechanism for enhancing interfacial strength, significantly outperforming vdW forces.
  • The findings provide critical insights for engineering interfacial interactions in composite materials.
  • This research paves the way for improved mechanical performance in various structures by optimizing interfacial properties.