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Interface-Driven Multifunctionality in Two-Dimensional TiO2 Nanosheet/Poly(Dimercaptothiadiazole-Triazine) Hybrid

Anju Kumari1, Shobith M Shanbogh1, Iranna Udachyan2

  • 1Department of Physics, School of Applied Sciences, REVA University, Bengaluru 560064, India.

ACS Applied Materials & Interfaces
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Summary

Hybrid devices combining titanium dioxide nanosheets (TiO2-NS) and a polymer exhibit enhanced resistive switching and UV sensing. The interface engineering in these TiO2-NS/Poly(DMcT-CC) devices unlocks multifunctional electronic properties.

Keywords:
RRAMTiO2 nanosheetshybrid devicesimpedance spectroscopymultifunctionalresistive switching

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Electronics

Background:

  • Interface engineering is crucial for developing advanced electronic devices.
  • Multifunctional properties in hybrid nanostructures are highly sought after.
  • Titanium dioxide nanosheets (TiO2-NS) and poly(dimercaptothiadiazole-triazine) [Poly(DMcT-CC)] are promising materials.

Purpose of the Study:

  • To fabricate and characterize a hybrid TiO2-NS/Poly(DMcT-CC) device.
  • To investigate the interface-activated multifunctional properties, including resistive switching (RS) and UV sensing.
  • To demonstrate the potential of interface manipulation for novel electronic applications.

Main Methods:

  • Fabrication of hybrid devices via spin coating Poly(DMcT-CC) on TiO2-NS.
  • Characterization of resistive switching, negative differential resistance, diode behavior, and UV sensing.
  • Impedance spectroscopy to analyze interface properties.

Main Results:

  • The hybrid device exhibits significantly enhanced RS (four orders of magnitude) compared to pristine materials due to p-n junction formation.
  • Stable resistive random access memory characteristics were observed, with the interface acting as a carrier trapping center.
  • A threefold current increment was achieved for UV light sensing at 60 mV.

Conclusions:

  • The NS/polymer interface is key to the multifunctional properties of the hybrid device.
  • Interface engineering enables enhanced resistive switching and UV sensing capabilities.
  • This work highlights the potential of manipulating such interfaces for developing advanced hybrid electronic structures.