DNA-driven dynamic assembly of MoS₂ nanosheets.

Area of Science:

• Materials Science
• Nanotechnology
• Biotechnology

Background:

• Controlling the assembly of molybdenum disulfide (MoS2) layers is crucial for advanced applications in optoelectronics, energy, and drug delivery.
• Existing methods for MoS2 superstructure formation often lack precise control over dynamic assembly and disassembly processes.

Purpose of the Study:

• To present a novel strategy for driving the assembly of MoS2 layers into static and dynamic superstructures using DNA hybridization.
• To demonstrate DNA-mediated control over the assembly and disassembly of MoS2 nanosheets in aqueous solutions.

Main Methods:

• Functionalization of MoS2 nanosheets with thiolated DNA strands.
• Assembly of MoS2 nanosheets into multilayered superstructures via complementary DNA hybridization.
• Triggering disassembly using pH-dependent i-motif formation and DNA strand displacement mechanisms.

Main Results:

• Successfully assembled MoS2 nanosheets into ordered superstructures using DNA linkers.
• Demonstrated controlled disassembly of MoS2 superstructures triggered by specific DNA-based mechanisms (i-motif formation and strand displacement).
• Validated the versatility of the DNA-driven approach for dynamic assembly and disassembly in aqueous environments.

Conclusions:

• DNA hybridization provides a versatile and effective platform for controlling the static and dynamic assembly of MoS2 nanosheets.
• The developed method offers precise control over superstructure formation and disassembly, paving the way for advanced MoS2-based devices.
• This DNA-based approach holds significant potential for applications requiring tunable nanomaterial assemblies, such as in optoelectronics and targeted drug delivery.