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The theory of catalytically perfect enzymes was first proposed by W.J. Albery and J. R. Knowles in 1976. These enzymes catalyze biochemical reactions at high-speed. Their catalytic efficiency values range from 108-109 M-1s-1. These enzymes are also called 'diffusion-controlled' as the only rate-limiting step in the catalysis is that of the substrate diffusion into the active site. Examples include triose phosphate isomerase, fumarase, and superoxide dismutase.
 
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Reduction of Benzene to Cyclohexane: Catalytic Hydrogenation01:28

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Reduction of Alkenes: Catalytic Hydrogenation02:13

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Alkenes undergo reduction by the addition of molecular hydrogen to give alkanes. Because the process generally occurs in the presence of a transition-metal catalyst, the reaction is called catalytic hydrogenation.
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Protein Complex Assembly02:41

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Reduction of Alkynes to cis-Alkenes: Catalytic Hydrogenation02:24

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Introduction
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Multiscale Structures Aggregated by Imprinted Nanofibers for Functional Surfaces
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Multiscale Plasma-Catalytic On-Surface Assembly.

Hugo Hartl1, Jennifer MacLeod1, Anthony P O'Mullane1

  • 1School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology (QUT), 2 George Street, Brisbane, QLD, 4000, Australia.

Small (Weinheim an Der Bergstrasse, Germany)
|August 22, 2019
PubMed
Summary
This summary is machine-generated.

Researchers developed a new scalable method for surface modification using plasma-assisted nucleation and self-assembly. This technique allows for precise control of materials at the atomic to nanoscale level under atmospheric conditions.

Keywords:
catalysisnanoassemblyon-surface synthesisplasma nanoscience

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Area of Science:

  • Nanoscience and nanotechnology
  • Materials science
  • Surface chemistry

Background:

  • Controlled surface modification is crucial for creating materials with specific functions.
  • Current methods often involve complex, energy-intensive processes, limiting their widespread application.
  • There is a need for scalable and efficient techniques for nanoscale surface engineering.

Purpose of the Study:

  • To introduce a novel concept for enhanced surface control.
  • To develop a method for fabricating bespoke materials with targeted functionalities.
  • To enable scalable surface modification at atmospheric pressures.

Main Methods:

  • Plasma-assisted nucleation
  • Self-assembly at atomic to nanoscales
  • Atmospheric pressure processing

Main Results:

  • Demonstrated a scalable approach for surface modification.
  • Achieved control over material properties at the atomic and nanoscale.
  • The method operates effectively under atmospheric pressure conditions.

Conclusions:

  • Plasma-assisted nucleation and self-assembly offers a promising route for advanced surface engineering.
  • This technique overcomes limitations of current methods in terms of precision, energy, and scalability.
  • The approach is suitable for fabricating tailored nanomaterials and surfaces.