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Functionalization of Single-walled Carbon Nanotubes with Thermo-reversible Block Copolymers and Characterization by Small-angle Neutron Scattering
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Active Bicomponent Nanoparticle Assembly with Temporal, Microstructural, and Functional Control.

Shikha Dhiman1, Akanksha Singh1, Subi J George1

  • 1Supramolecular Chemistry Laboratory, School of Advanced Materials (SAMat) and New Chemistry Unit, Jawaharlal Nehru Centre for Advanced Scientific Research (JNCASR), Jakkur, Bangalore, 560064, India.

Chemistry (Weinheim an Der Bergstrasse, Germany)
|July 23, 2020
PubMed
Summary
This summary is machine-generated.

Researchers created smart nanoparticle materials using two components that change structure with pH. This allows for control over their photocatalytic activity, paving the way for advanced functional materials.

Keywords:
fuel-drivenheterostructuresnonequilibrium processessupramolecular chemistrytransient

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Supramolecular Chemistry

Background:

  • Transient supramolecular self-assembly is key for developing programmable smart materials.
  • Single-component self-assembly has been extensively studied, but multicomponent systems offer greater complexity and functionality.
  • Predicting and controlling microstructures in multicomponent assemblies remains challenging.

Purpose of the Study:

  • To engineer active bicomponent nanoparticle assemblies with orthogonal pH responsiveness.
  • To achieve temporal control over microstructure formation (self-sorted vs. co-assembled).
  • To harness emergent transient photocatalytic activity linked to pH-induced structural changes.

Main Methods:

  • Utilized gold and cadmium selenide nanoparticles functionalized with pH-responsive groups.
  • Investigated the self-assembly behavior in response to varying pH conditions.
  • Characterized the resulting nanostructures and their photocatalytic performance.

Main Results:

  • Demonstrated the ability to control the microstructural organization of bicomponent nanoparticle assemblies.
  • Showcased pH-dependent transitions between self-sorted and co-assembled states.
  • Observed emergent transient photocatalytic activity modulated by temporal pH changes.

Conclusions:

  • Multicomponent nanoparticle self-assembly offers advanced control over structural and functional outcomes.
  • Temporally programmable smart materials can be achieved through pH-responsive assembly.
  • This approach enables the development of novel materials with tunable emergent properties.