Boosting Hot Electron-Driven Photocatalysis through Anisotropic Plasmonic Nanoparticles with Hot Spots in Au–TiO<sub>2</sub> Nanoarchitectures

Sousa‐Castillo, Ana; Comesaña‐Hermo, Miguel; Rodríguez‐González, Benito; Pérez‐Lorenzo, Moisés; Wang, Zhiming; Kong, Xiang‐Tian; Govorov, Alexander O.; Correa‐Duarte, Miguel A.

doi:10.1021/acs.jpcc.6b02370

Cited by 212 publications

(296 citation statements)

References 45 publications

Supporting

Mentioning

291

Contrasting

Order By: Relevance

“…Sousa-Castillo et al compared gold nanospheres, nanorods, and nanostars in Au-TiO 2 nanostructures, both experimentally and theoretically. [46] Both results showed that the catalytic efficiency of these architectures strongly depends on the EM field enhancement of the plasmonic components, which was proportional to their degree of anisotropy. Among the shapes studied, Au nanostars exhibited the most intensive local fields around their spikes, leading to the highest photocatalytic performance.…”

Section: Wwwadvopticalmatdementioning

confidence: 94%

Hot‐Electron‐Mediated Photochemical Reactions: Principles, Recent Advances, and Challenges

Kim

Lin

Son

et al. 2017

Advanced Optical Materials

154

116

View full text Add to dashboard Cite

Hot electron chemistry has drawn tremendous attention from applications related to materials, energy, sensing, and catalysis. The plasmon‐induced generation of hot electrons and their transfer behavior are very important for understanding plasmonic‐enhanced applications and for achieving practically useful efficiency. From a plasmonic perspective, well‐designed plasmonic structures that can manipulate surface plasmons are able to enhance the efficiencies of hot electron‐based processes. This progress report summarizes the recent experimental and theoretical advances on the hot electron effect, emphasizing the crucial role of surface plasmons that are highly designable by using metal nanostructures. In particular, recent breakthroughs in the emerging fields of heterogeneous catalysis based on the hot electron effect are highlighted. Important design principles, mechanisms, and concepts, as well as challenges and perspectives, are illustrated and discussed.

show abstract

Section: Wwwadvopticalmatdementioning

confidence: 94%

Hot‐Electron‐Mediated Photochemical Reactions: Principles, Recent Advances, and Challenges

Kim

Lin

Son

et al. 2017

Advanced Optical Materials

154

116

View full text Add to dashboard Cite

show abstract

“…68 Therefore it is anticipated that Au nanostars give higher activity in PICS-based photocatalysis than nanorods and nanospheres. 68 …”

Section: Details Of Picsmentioning

confidence: 99%

Plasmon-induced charge separation: chemistry and wide applications

2017

View full text Add to dashboard Cite

show abstract

“…In this paper, we demonstrate very large CD signals in the HE generation, which can in turn induce chemical reactions. 32,[50][51][52][53] In fact, we predict and propose polarization-sensitive photochemistry with very large asymmetry g-factors, in the order of 0.15-0.6 (15-60%). Such giant g-factors are only possible for chiral plasmonic systems with very strong absorption resonances and strong plasmonic near-field interactions.…”

Section: Introductionmentioning

confidence: 99%

Chiral Plasmonic Nanocrystals for Generation of Hot Electrons: Toward Polarization-Sensitive Photochemistry

et al. 2019

Self Cite

View full text Add to dashboard Cite

The use of biomaterials -with techniques such as DNA-directed assembly or biodirected synthesis -can surpass top-down fabrication techniques in creating plasmonic superstructures, in terms of spatial resolution, range of functionality and fabrication speed.Particularly, by enabling a very precise placement of nanoparticles in a bio-assembled complex or a controlled bio-directed shaping of single nanoparticles, plasmonic nanocrystals can show remarkably strong circular dichroism (CD) signals. Here we show that chiral bio-plasmonic assemblies can enable polarization-sensitive photochemistry based on the generation of energetic (hot) electrons. It is now established that hot plasmonic electrons can induce surface photochemistry or even reshape plasmonic nanocrystals. Here we show that merging chiral plasmonic nanocrystal systems and the hot-election generation effect offers unique possibilities in photochemistry -such as polarization-sensitive photochemistry promoting nonchiral molecular reactions, chiral photo-induced growth of a colloid at the atomic level and chiral photochemical destruction of chiral nanocrystals. In contrast, for chiral molecular systems the equivalent of the described effects is challenging to be observed because molecular species exhibit typically very small CD signals. Moreover, we compare our findings with traditional chiral photochemistry at the molecular level, identifying new, different regimes for chiral photochemistry with possibilities that are unique for plasmonic colloidal systems. In this study, we bring together the concept of hot-electron generation and the field of chiral colloidal plasmonics. Using chiral plasmonic nanorod complexes as a model system, we demonstrate remarkably strong CD in both optical extinction and generation rates of hot electrons. Studying the regime of steady-state excitation, we discuss the influence of geometrical and material parameters on the chiral effects involved in the generation of hot electrons. Optical chirality and the chiral hot-electron response in the nanorod dimers result from complex inter-particle interactions, which can appear in the weak coupling 3 regime or in the form of Rabi splitting. Regarding practical applications, our study suggests interesting opportunities in polarization-sensitive photochemistry, chiral recognition or separation, and in promoting chiral crystal growth at the nanoscale.

show abstract

Boosting Hot Electron-Driven Photocatalysis through Anisotropic Plasmonic Nanoparticles with Hot Spots in Au–TiO₂ Nanoarchitectures

Cited by 212 publications

References 45 publications

Hot‐Electron‐Mediated Photochemical Reactions: Principles, Recent Advances, and Challenges

Hot‐Electron‐Mediated Photochemical Reactions: Principles, Recent Advances, and Challenges

Plasmon-induced charge separation: chemistry and wide applications

Chiral Plasmonic Nanocrystals for Generation of Hot Electrons: Toward Polarization-Sensitive Photochemistry

Contact Info

Product

Resources

About

Boosting Hot Electron-Driven Photocatalysis through Anisotropic Plasmonic Nanoparticles with Hot Spots in Au–TiO2 Nanoarchitectures

Cited by 212 publications

References 45 publications

Hot‐Electron‐Mediated Photochemical Reactions: Principles, Recent Advances, and Challenges

Hot‐Electron‐Mediated Photochemical Reactions: Principles, Recent Advances, and Challenges

Plasmon-induced charge separation: chemistry and wide applications

Chiral Plasmonic Nanocrystals for Generation of Hot Electrons: Toward Polarization-Sensitive Photochemistry

Contact Info

Product

Resources

About

Boosting Hot Electron-Driven Photocatalysis through Anisotropic Plasmonic Nanoparticles with Hot Spots in Au–TiO₂ Nanoarchitectures