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Spin-dependent electrified protein interfaces for probing the CISS effect
Ritu Gupta1, Hariharan V Chinnasamy2, Dipak Sahu3
1Department of Chemistry, Indian Institute of Technology Kanpur, Uttar Pradesh 208016, India.
The Journal of Chemical Physics
|July 13, 2023
Summary
Researchers created bio-spintronic devices using Rvb2 protein, demonstrating significant spin-selective electron transport. This breakthrough enables biomolecules in electronic components for potential biomedical applications.
Area of Science:
- Spintronics and molecular electronics
- Biophysics and biomaterials science
Background:
- Bio-spinterfaces offer novel spintronic studies but face challenges due to biomolecule sensitivity during fabrication.
- Chirality-induced spin selectivity (CIS) reveals spin-dependent electron transport through chiral molecules.
Purpose of the Study:
- To fabricate bio-spintronic devices using Ustilago maydis Rvb2 protein.
- To investigate spin-selective electron transport through the Rvb2 protein.
Main Methods:
- Fabrication of a Ni/Rvb2 protein/indium tin oxide device.
- Measurement of spin-selective electron transmission under varying magnetic configurations.
- Utilizing the Rvb2 protein, an ATP-dependent DNA helicase, as a biomolecular component.
Main Results:
- Demonstrated spin-selective electron transmission through the Rvb2 protein.
- Achieved 30% spin polarization at a low bias of +0.5 V.
- Showcased the feasibility of integrating biomolecules into devices without vacuum deposition for top contacts.
Conclusions:
- Biomolecules, like Rvb2 protein, can facilitate spin-selective electron transport.
- The study highlights the potential of bio-spinterfaces for advancing spintronics.
- Findings suggest future applications in biomedical devices utilizing protein-based spin transport.
