Plasmonic photocatalysis

Structure–Property–Performance Relationships of Dielectric Cu2O Nanoparticles for Mie Resonance-Enhanced Dye Sensitization

“…Recently, it has been demonstrated that plasmonic Mie resonances of metal nanostructures, such as silver (Ag) and gold (Au) can be used to enhance the light absorption efficiency of dye molecules in the DSP and photovoltaic systems. − The plasmonic metal nanostructures (PMNs) under Mie resonance conditions can exhibit very high absorption cross-sectional values that are up to 5 orders of magnitude higher than those of dye molecules. − Therefore, a PMN (e.g., Ag and Au) can harvest a large fraction of the incident light and transfer the energy into the nearby dye molecules and enhance their light absorption efficiency via a number of pathways, including the nanoantenna effect and plasmon-induced resonance energy transfer (Figure b). − These plasmonic Mie resonance-mediated effects are utilized to enhance the rate of dye sensitization in DSP systems. However, these PMN-based DSP systems also possess inherent challenges, such as compatibility issues with conventional semiconductor manufacturing, high material costs, and issues of commercialization with increasing complexity due to the need for both metals and semiconductors.…”

Cupric Oxide Mie Resonators

“…Hence, they enable trace-level/single molecule spectroscopy, − ultrasensitive light detection, , biosensing, and heat transfer. , In recent years, the development of optical antennas has mainly relied on plasmonic metal nanostructures (PMNs). Numerous applications of PMNs have been demonstrated, such as sensors, nano-, and micro-optical devices, photocatalysis, − and photovoltaics. − PMNs exhibit high extinction cross sections due to localized surface plasmon resonance (LSPR). ,− The LSPR frequency is sensitive to dielectric function and geometry (shape and size) of the nanostructure as well as the physical environment and EM coupling between neighboring nanostructures and substrates. , However, plasmonic resonators suffer from absorption losses inherent to metals at visible frequencies …”

Tuning Catalytic Activity and Selectivity in Photocatalysis on Mie-Resonant Cuprous Oxide Particles: Distinguishing Electromagnetic Field Enhancement Effect from the Heating Effect

“…The PMNs (e.g., Ag, Au, and Cu) exhibit an optical phenomenon called plasmonic Mie resonance that is typically in the visible and infrared regions of the electromagnetic spectrum. 2,3,21,22 At plasmonic Mie resonance frequencies, there is a significant enhancement in the light−matter interaction, resulting in the generation of high electric fields as well as absorption (i.e., excited electron−hole pairs) and scattering in/from the nanostructures. 2,3 Numerous reports in the past decade have shown that the energetic charge carriers created in the PMNs can be utilized to control and tune the catalytic activity.…”

“…27−34 The main reason for this issue is that most of the temperature measurements reported on the plasmonic Mie resonator catalysts are based on macroscopic and ensemble measurements. 2,3 To alleviate this issue, local temperature measurement using a nanothermometry technique on a single particle level is desired. 2,3 Another major limiting factor of plasmonic Mie resonancemediated photocatalysis is that the excited charge carriers generated in the PMNs are short-lived with lifetimes on the order of 10s of femtoseconds (fs) to picoseconds (ps) due to the short electron mean free path in metals.…”