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Quantification of DNA/SWCNT Solvation Differences by Aqueous Two-Phase Separation.

Yoona Yang, Akshaya Shankar, Thibault Aryaksama1

  • 1ESPCI , 10 Rue Vauquelin, 75005 Paris, France.

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Aqueous two-phase systems can separate DNA/carbon nanotube hybrids by chirality. This study quantifies their solubility and solvation free energy using two novel analytical approaches.

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Physical Chemistry

Background:

  • Single-walled carbon nanotubes (SWCNTs) are crucial nanomaterials with diverse applications.
  • Separating SWCNTs by chirality is essential for tailoring their properties.
  • DNA-coated SWCNTs can be separated using aqueous two-phase (ATP) systems.

Purpose of the Study:

  • To quantitatively analyze the partitioning of DNA/SWCNT hybrids in ATP systems.
  • To develop methods for quantifying dissolution properties like solvation free energy and solubility.
  • To establish a link between ATP partitioning and the fundamental physicochemical properties of DNA/SWCNT hybrids.

Main Methods:

  • Utilized an aqueous two-phase (ATP) system for separating DNA/SWCNT hybrids.
  • Developed a model to extract relative solvation free energy based on partitioning.
  • Analyzed hybrid partitioning to determine solubility parameters.

Main Results:

  • Demonstrated that ATP systems can effectively separate DNA/SWCNT hybrids based on chirality.
  • Successfully quantified relative solvation free energy for different DNA/SWCNT hybrids.
  • Extracted solubility parameters consistent with solvation free energy measurements.

Conclusions:

  • ATP systems offer a robust method for both separating and quantifying the solubility of DNA/SWCNT hybrids.
  • The developed analytical approaches provide reliable measures of solvation free energy and solubility.
  • This work advances the understanding of DNA/SWCNT interactions and their behavior in solution.