scholarly journals Electrochemical modulation of plasmon-induced charge separation behaviour at Au–TiO2 photocathodes

2019 ◽  
Vol 18 (7) ◽  
pp. 1727-1731 ◽  
Author(s):  
Kazutaka Akiyoshi ◽  
Tetsu Tatsuma
Keyword(s):  
Particle Size ◽  
Charge Separation ◽  
Enhancement Factor ◽  
Induced Charge

Photocathodic currents of ITO/Au/TiO2 electrodes based on plasmon-induced charge separation were enhanced by applying negative potentials, and the enhancement factor was increased as the particle size was decreased.

Plasmon-Induced Charge Separation and Recombination Dynamics in Gold−TiO2 Nanoparticle Systems: Dependence on TiO2 Particle Size

2009 ◽  
Vol 113 (16) ◽  
pp. 6454-6462 ◽  
Author(s):  
Luchao Du ◽  
Akihiro Furube ◽  
Kazuhiro Yamamoto ◽  
Kohjiro Hara ◽  
Ryuzi Katoh ◽  
...  
Keyword(s):  
Particle Size ◽  
Charge Separation ◽  
Tio2 Particle ◽  
Tio2 Nanoparticle ◽  
Induced Charge ◽  
Recombination Dynamics

Effects of particle size and annealing on plasmon-induced charge separation at self-assembled gold nanoparticle arrays

2018 ◽  
Vol 20 (5) ◽  
pp. 3735-3740 ◽  
Author(s):  
Kun-Che Kao ◽  
Hiroyasu Nishi ◽  
Tetsu Tatsuma
Keyword(s):  
Particle Size ◽  
Gold Nanoparticle ◽  
Quantum Efficiency ◽  
Charge Separation ◽  
Internal Quantum Efficiency ◽  
Au Nanoparticle ◽  
Nanoparticle Array ◽  
Nanoparticle Arrays ◽  
Induced Charge ◽  
Interface Mode

The internal quantum efficiency of plasmon-induced charge separation of a Au nanoparticle array on TiO2 without interparticle coupling increases with decreasing particle size. The efficiency is also improved by the enhancement of a plasmonic interface mode.

scholarly journals Controlling the oxidation state of molybdenum oxide nanoparticles prepared by ionic liquid/metal sputtering to enhance plasmon-induced charge separation

RSC Advances ◽  
2020 ◽  
Vol 10 (48) ◽  
pp. 28516-28522 ◽  
Author(s):  
Kazutaka Akiyoshi ◽  
Tatsuya Kameyama ◽  
Takahisa Yamamoto ◽  
Susumu Kuwabata ◽  
Tetsu Tatsuma ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Liquid Metal ◽  
Oxidation State ◽  
Molybdenum Oxide ◽  
Charge Separation ◽  
Room Temperature ◽  
Room Temperature Ionic Liquid ◽  
Oxide Nanoparticles ◽  
Induced Charge ◽  
Molybdenum Oxide Nanoparticles

MoOx NPs, prepared by sputtering Mo metal on a room-temperature ionic liquid (RTIL) followed by heating in air, produced anodic photocurrents with the excitation of their LSPR peak.

Hydrogen evolution from water based on plasmon-induced charge separation at a TiO2/Au/NiO/Pt system

2017 ◽  
Vol 19 (46) ◽  
pp. 31429-31435 ◽  
Author(s):  
Kun-Che Kao ◽  
Yoshinori Kuroiwa ◽  
Hiroyasu Nishi ◽  
Tetsu Tatsuma
Keyword(s):  
Hydrogen Evolution ◽  
Methanol Oxidation ◽  
Charge Separation ◽  
Au Nanoparticles ◽  
System P ◽  
Water Based ◽  
Induced Charge

Plasmonic Au nanoparticles inject electrons into TiO2 and reduce water to hydrogen at a Pt cathode. Positive charges left in the Au nanoparticles are extracted by NiO and used for methanol oxidation.

scholarly journals Creation of Hybrid Photoactive Inorganic/Organic Interface Assemblies of Cadmium Oxide mixtures (CdO2/CdO)/Poly-2,2-Bithiophene; Optical and Photoelectrochemical Investigations

2017 ◽  
Vol 9 (4) ◽  
pp. 71
Author(s):  
Kasem K. Kasem ◽  
Henry Worley ◽  
Ashley Lovins
Keyword(s):  
Charge Separation ◽  
Cadmium Oxide ◽  
Equilibrium Mixture ◽  
Organic Polymer ◽  
Aqueous Electrolytes ◽  
Charge Generation ◽  
Transfer Processes ◽  
Organic Interfaces ◽  
Band Alignments ◽  
Induced Charge

Nanoparticles of cadmium peroxide (CdO2) were immobilized in poly 2,2 bithiophene (PBTh) to build photoactive inorganic/organic interfaces (I/O/I). Studies indicated that the CdO2 initially immobilized in the organic polymer partially decomposed to a low band gap CdO. Therefore we refer to this mixture as CdO2/CdO. The CdO2/CdO/PBTh assemblies were subjected to optical and photoelectrochemical investigations in aqueous electrolytes containing acetate, nitrate, or phosphate. The equilibrium mixture of CdO2/CdO influenced the optical conductivity and dielectric contents of the assemblies. Furthermore, O2 played an important role in the charge separation and transfer processes. The effects of an applied magnetic field were investigated and reported. The results were explained on the basis of formation of hybrid sub-bands due to band alignments between the assembly components. The photo-induced charge generation of PBTh was improved by occlusion of CdO2 in the polymer as was evident by the greater photocurrent generated by CdO2/CdO/PBTh than that generated by PBTh.

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