Design, Mechanisms, and Applications of DNA-Mediated Dynamically Reconfigurable Plasmonic Gold Nanostructures

Area of Science:

• Plasmonics and Nanomaterials Science
• Biomedical Engineering and Advanced Materials

Background:

• Static gold nanostructures (AuNSs) have limitations in dynamic applications.
• Reconfigurable AuNSs offer tunable responses to external stimuli, enabling new functionalities.
• The architecture of nanostructures is critical for their operational principles.

Purpose of the Study:

• To review the design and working principles of reconfigurable gold-based plasmonic nanostructures.
• To explore methods for controlling reconfigurability using DNA, chemical, and physical stimuli.
• To illustrate the utilization of these properties in bio-applications and functional hybrid materials.

Main Methods:

• Modulation of reconfigurable AuNSs using highly programmable DNA.
• Application of chemical stimuli (pH, metal ions) and physical stimuli (temperature, light) for actuation.
• Discussion of methods to control these stimuli for precise reconfigurability.

Main Results:

• Demonstration of dynamic response and cyclic switching functions in AuNSs.
• Identification of key design principles for achieving reconfigurability.
• Illustration of practical applications in advanced materials and biomedicine.

Conclusions:

• Reconfigurable AuNSs provide significant versatility over static counterparts.
• Programmable DNA and external stimuli are effective handles for controlling nanostructure reconfigurability.
• These dynamic nanostructures hold great promise for future innovations in materials science and biomedicine.