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Related Concept Videos

Preparation and Reactions of Thiols02:33

Preparation and Reactions of Thiols

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Thiols are prepared using the hydrosulfide anion as a nucleophile in a nucleophilic substitution reaction with alkyl halides. For instance, bromobutane reacts with sodium hydrosulfide to give butanethiol.
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Immunogold Electron Microscopy01:20

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Immunoelectron microscopy utilizes immunogold labeling of endogenous proteins with specific antibodies to detect and localize these proteins in cells and tissues. The procedure provides insights into the distribution and quantification of protein under different stimulation conditions offering clues about their functions. Conjugating highly electron-dense gold particles with primary or secondary antibodies allow antigen detection on and within cells, with high resolution and specificity.
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Luminophore Formation in Various Conformations of Bovine Serum Albumin by Binding of GoldIII
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Quantifying thiol-gold interactions towards the efficient strength control.

Yurui Xue1, Xun Li1, Hongbin Li2

  • 1State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, 2699 Qianjin Street, Changchun 130012, China.

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|July 8, 2014
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Summary
This summary is machine-generated.

Investigating thiol-gold interactions reveals that oxidized gold surfaces enhance contact stability. Individual thiol-gold contacts are more stable than those in self-assembled monolayers, offering insights for material design.

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Area of Science:

  • Surface science and nanotechnology
  • Materials chemistry

Background:

  • Thiol-gold interactions are fundamental for creating self-assembled monolayers (SAMs) used in various applications.
  • Understanding the stability of these interactions is crucial for optimizing SAM performance.

Purpose of the Study:

  • To quantify the stability of individual thiol-gold contacts.
  • To investigate the influence of surface oxidation, pH, and time on thiol-gold bond strength.
  • To compare the stability of isolated thiol-gold contacts versus those within SAMs.

Main Methods:

  • Utilized atomic force microscopy (AFM) to probe individual thiol-gold contacts.
  • Formed contacts using isolated single thiols and within SAMs on gold surfaces.
  • Experimentally varied environmental pH and interaction time.

Main Results:

  • Oxidized gold surfaces significantly enhance the stability of gold-thiol contacts.
  • Observed a shift in binding modes from coordinate to covalent bonds with changes in pH and time.
  • Found that isolated thiol-gold contacts exhibit greater stability than those in SAMs.

Conclusions:

  • The study elucidates mechanisms controlling thiol-gold contact strength.
  • Findings provide guidance for designing robust thiol-gold interfaces for practical applications.
  • Surface oxidation and environmental conditions are key factors in modulating thiol-gold interaction stability.