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Magnetic and Thermal-sensitive PolyN-isopropylacrylamide-based Microgels for Magnetically Triggered Controlled Release

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All-polymeric control of nanoferronics.

Beibei Xu¹, Huashan Li², Asha Hall³

¹Department of Mechanical Engineering and Temple Materials Institute, Temple University, Philadelphia, PA 19122, USA.

Science Advances

|January 30, 2016

Summary

Researchers discovered multiferroicity in new all-organic nanoferronics. These crystalline polymers exhibit coexisting magnetic and electric orders, paving the way for flexible electronic devices.

Keywords:

Self-assembly and charge transfer crystalline structures magnetoelectrics

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Published on: February 5, 2022

Area of Science:

Materials Science
Organic Electronics
Nanotechnology

Background:

Developing light and flexible nanoferronics requires materials with coexisting magnetic and electric orders.
Crystalline charge-transfer complexes are a key area of research for achieving multiferroicity.

Purpose of the Study:

To report the first example of multiferroicity in centimeter-sized crystalline polymeric charge-transfer superstructures.
To investigate the charge order-driven ferroic mechanism and its dependence on molecular self-organization.

Main Methods:

Growth of crystalline polymeric charge-transfer superstructures at the liquid-air interface.
Controlled synthesis based on the regioregularity of the polymeric chain.
Analysis of spontaneous and hysteretic polarization and magnetization.

Main Results:

Demonstration of multiferroicity in centimeter-sized all-organic crystalline polymeric charge-transfer superstructures.
Identification of a charge order-driven ferroic mechanism responsible for coexisting polarization and magnetization.
Correlation between charge transfer, molecular packing, and ferroic properties.

Conclusions:

This work presents a novel coupling mechanism for magnetic and electric ordering in organic materials.
A new class of emerging all-organic nanoferronics has been created.
The findings offer a pathway toward the development of advanced flexible electronic devices.