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Published on: November 14, 2018
Directed assembly of nanodiamond nitrogen-vacancy centers on a chemically modified patterned surface
Saleem G Rao1, Altaf Karim, Julian Schwartz
1Department of Physics, King Fahd University of Petroleum and Minerals , Dhahran 31261, Saudi Arabia.
Researchers developed a method to pattern nanodiamonds (NDs) with nitrogen-vacancy (NV) centers on gold surfaces. This technique uses surface wettability to create precise ND structures for advanced technologies.
Area of Science:
- Materials Science
- Nanotechnology
- Quantum Technologies
Background:
- Nitrogen-vacancy (NV) centers in nanodiamonds (NDs) offer unique optical and spin properties.
- Applications in photonics, quantum information, and sensing require precise nanoscale assembly of NDs.
Purpose of the Study:
- To develop a large-scale method for patterned assembly of NDs on a gold (Au) surface.
- To control ND arrangement using surface wettability.
Main Methods:
- Fabrication of hydrophobic and hydrophilic regions on an Au surface using self-assembled monolayers (SAMs).
- Assembly of NDs by evaporating a water droplet suspension onto the patterned SAM surface.
- Characterization of NV centers using photoluminescence imaging.
Main Results:
- Successful large-scale patterned assembly of NDs into dots, lines, and rectangles.
- Confirmation of optically active NV centers in the patterned structures.
- Demonstration that surface wettability is the primary factor in ND assembly.
Conclusions:
- The SAM-based wettability patterning method enables controlled nanoscale assembly of NDs.
- This technique is effective for creating functional ND structures for various applications.
- Surface wettability is a key parameter for directed nanodiamond assembly.
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