Related Experiment Video
Updated: Jun 2, 2026
09:29
Utilization of Plasmonic and Photonic Crystal Nanostructures for Enhanced Micro- and Nanoparticle Manipulation
Published on: September 27, 2011
Photochemically and electrochemically triggered Au nanoparticles "sponges".
Dora Balogh1, Ran Tel-Vered, Ronit Freeman
1The Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem, Jerusalem 91904, Israel.
Journal of the American Chemical Society
|April 13, 2011
Summary
This study presents a smart material that changes surface wettability and controls molecular uptake and release using light or electricity. This innovation offers new possibilities for drug delivery and microfluidic applications.
Area of Science:
- Materials Science
- Nanotechnology
- Surface Chemistry
Background:
- Stimuli-responsive "smart" materials are crucial for advanced applications like drug delivery and microfluidics.
- Controlled surface wettability and substrate uptake/release are key functionalities for these materials.
Purpose of the Study:
- To develop a novel composite "sponge" material capable of stimuli-triggered wettability and molecular binding/release.
- To investigate the use of photoisomerizable molecules and molecular imprinting for creating responsive recognition sites.
- To demonstrate the integration of photonic and electrical triggers for precise control over material functions.
Main Methods:
- Electropolymerization of gold nanoparticles (Au NPs) functionalized with nitrospiropyran/nitromerocyanine on a gold electrode.
- Incorporation of molecularly imprinted sites for selective binding of N,N -bis(3-sulfonatopropyl)-4,4 -bipyridinium (PVS).
- Utilizing CdSe/ZnS quantum dots as photonic labels to monitor uptake and release dynamics.
Main Results:
- The composite material exhibited four distinct states controlled by photonic and/or electrical signals.
- Demonstrated tunable binding and release capacities for PVS.
- Achieved controlled surface wettability transitions.
- Successfully monitored PVS uptake and release using quantum dot fluorescence.
Conclusions:
- The developed smart material offers precise control over surface wettability and molecular interactions.
- The system provides a versatile platform for applications in drug delivery and microfluidics.
- The combination of molecular imprinting and photoisomerizable molecules enables sophisticated stimuli-responsive behavior.
