Abstract
4. Continuous synthesis of gold nanoparticles in micro- and millifluidic systems
Highlights
4.1.1 Applications of gold nanoparticlesGold nanomaterials have been a topic of intense investigation in the last few decades owing to their unique optical, chemical, biological and catalytic properties
Unlike many chemical synthesis processes that only benefit from the improved residence time distribution (RTD), mixing efficiency, heat transfer and control afforded by milli- and microfluidic devices, the synthesis of particles in flow systems is much more complex due to the potential for reactor surface interactions
4.4.2.2 Reactor fouling/interfacial absorption Fouling often creates complications in milli- and microfluidic flow systems used for synthesizing particles
Summary
Gold nanomaterials have been a topic of intense investigation in the last few decades owing to their unique optical, chemical, biological and catalytic properties This is due to some attractive physical characteristics, which are determined by physical parameters such as particle size, morphology, surface, crystallinity and composition. If analyte molecules bind to Au NPs either directly or via some linker ligands, the local refractive index changes and the plasmon absorption shifts to longer wavelengths The former results in colour change, which makes NPs attractive for colorimetric sensors, while the latter can be detected both by LSPR extinction or the angle of reflected light and are exploited in other plasmonic sensors [5, 10]. In addition to the above optical properties, Au NPs demonstrate catalytic properties, which can be tuned by particle size, surface functionality and intraparticle separation Such properties are exploited in various electrochemical and electrocatalytic sensors. Selectivity to desired products can increase or decrease with nanoparticle size, depending on the particular reaction [37, 38]
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have