Recent developments in utilising yoctowells for investigations in nanospace.

Area of Science:

• Surface chemistry
• Nanotechnology
• Molecular engineering

Background:

• Yoctowells are novel surface-engineered systems with yoctolitre volumes for single-molecule studies.
• Their properties can be tuned via monolayer composition and post-functionalization, including electrostatic effects.

Purpose of the Study:

• To review the development of yoctowell chemistry.
• To explore applications in molecular separation, containment, manipulation, and interaction studies.
• To highlight the use of porphyrins for optical readout of molecular recognition.

Main Methods:

• Construction of rigid monolayers forming yoctolitre-volume cavities (yoctowells).
• Post-functionalization of yoctowells to tune properties and introduce specific interactions.
• Utilizing porphyrins for optical detection (absorption, emission) of molecular events.

Main Results:

• Demonstrated ability to separate, contain, and manipulate individual molecules within yoctowells.
• Showcased derivatization for substrate discrimination and molecular sorting.
• Established porphyrins as effective optical reporters for molecular recognition.

Conclusions:

• Yoctowell technology offers a powerful platform for single-molecule analysis and manipulation.
• Potential applications include molecular sorting in solid-state devices and fundamental studies of molecular interactions.
• Future advances will likely expand the utility and applications of yoctowell systems.