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Updated: Feb 25, 2026
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Probing the Structure and Dynamics of Interfacial Water with Scanning Tunneling Microscopy and Spectroscopy
Published on: May 27, 2018
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Hydrotrope induced structural modifications in CTAB/butanol/water/isooctane reverse micellar systems
Vaishali Sethi1, Jayanti Mishra, Arpan Bhattacharyya
1Department of Chemistry, Indian Institute of Technology, Hauz Khas, New Delhi-110016, India.
Physical Chemistry Chemical Physics : PCCP
|August 10, 2017
Summary
Researchers modified reverse micellar nanotemplates using sodium salicylate and water loading. They controlled nanostructure shape from cylinders to ellipsoids, enabling tunable soft templates for nanomaterial fabrication.
Area of Science:
- Materials Science
- Colloid and Surface Chemistry
- Nanotechnology
Background:
- Designing nanostructures with specific morphologies requires advanced synthetic methods.
- Reverse micellar nanotemplates offer a versatile platform for nanoscale structure control.
Purpose of the Study:
- To investigate structural modifications in cationic surfactant (CTAB/butanol/water/isooctane) reverse micellar nanotemplates.
- To understand the influence of hydrotrope (sodium salicylate) concentration and water loading (Wx) on micellar structure.
Main Methods:
- Synchrotron small-angle X-ray scattering (SAXS) to probe micellar structure and transitions.
- Proton Nuclear Magnetic Resonance (¹H NMR) to investigate hydrotrope location and interactions.
- Application of Polymer Reference Interaction Site (PRISM) and Macroion models to describe inter-micellar interactions.
Main Results:
- Structural transitions from 1D cylinders to prolate ellipsoids were achieved by tuning the water-to-surfactant ratio.
- Hydrotrope concentration effectively modulated the growth of micellar droplets.
- Inter-micellar interactions were modeled by PRISM at low water content and by the Macroion model at high water loadings.
Conclusions:
- The study demonstrates the ability to control and tune the shape of reverse micellar droplets (cylindrical/ellipsoidal).
- These tunable soft templates hold significant promise for the fabrication of complex nanostructures.
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