Content:
Gold nanoparticles (AuNPs) incorporated into the stimuli-responsive polymeric matrix play an increasingly important role in the 'smart' optical devices. To date, a myriad of methods in developing the 'smart' plasmonic systems, mainly focus on the reversible aggregation of responsive molecule functionalized AuNPs. In the few available reports, gold nanoparticles assemblies are designed to allow reversibility (dispersion↔aggregation) in respond to temperature changes, since it is an appealing way to bring the constituent particles into close proximity, giving rise to the shift of the LSPR (localized surface plasmon resonance) frequency. While others involve pH or light-induced ligands so that the nanoassemblies are photosensitive to the stimuli. The irregular macroscopic aggregates are mainly discussed in the existing plasmonic platforms but their configurations are not well defined structure, which make it difficult to interpret bulk measurements in terms of the optical response of single nanostructure. We are now focusing on the assembly of AuNPs into arrays of asymmetric nanostructures, such as core-satellites. The temperature-responsive polymers with lower critical solution temperature (LCST), upper critical solution temperature (UCST), and LCST-co-UCST was used to link and modulate the gap distance between the particles. It permits optical shifts over a wide wavelength ranges and reversible control the optical properties by altering the stimuli, which may allow these systems to become candidates for temperature-sensitive nanosensor.
Note:
Dissertation University of New South Wales. Chemistry 2017
Language:
English
