Related Experiment Video
Updated: Jun 30, 2025
12:03
Preparation of Mica and Silicon Substrates for DNA Origami Analysis and Experimentation
Published on: July 23, 2015
14.4K
Silver induced chirality controlled spin filtration observed in ss-DNA functionalized with MoS2
Abhinandan Kumar1, Subrata Majumder1
1Department of Physics, National Institute of Technology, Patna 800005, India.
The Journal of Chemical Physics
|March 22, 2024
Summary
Spin-selective electron transport through chiral poly-cytosine molecules was achieved. Silver ion interaction reversed spin polarization, enabling potential advances in spin-based electronics and bioanalytical systems.
Area of Science:
- Molecular electronics
- Spintronics
- Chiral materials science
Background:
- Chiral molecules exhibit strong spin-orbit coupling, leading to spin polarization.
- Electron spin manipulation is crucial for advanced electronic applications.
Purpose of the Study:
- To demonstrate controlled spin-selective electron transmission through chiral molecules.
- To investigate the effect of silver ions on spin polarization in poly-cytosine.
Main Methods:
- Utilizing quantum mechanical tunneling for electron transport.
- Functionalizing poly-cytosine with MoS2 flakes on ITO glass.
- Employing circular dichroism spectroscopy to confirm structural changes.
Main Results:
- Achieved controlled spin-selective electron transmission through 20 base-paired poly-cytosine.
- Observed a reversion in spin polarization upon silver ion interaction.
- Confirmed the formation of duplex structural motifs via circular dichroism.
Conclusions:
- Electron spin can be manipulated in chiral molecules using cations.
- This offers potential for spin-independent charge transport and bioanalytical systems.
- Highlights the role of molecular structure and ion coordination in spintronic phenomena.
