Plasmon-mediated charge dynamics and photoactivity enhancement for Au-decorated ZnO nanocrystals

2018 ◽  
Vol 6 (10) ◽  
pp. 4286-4296 ◽  
Author(s):  
Yi-Hsuan Chiu ◽  
Kao-Der Chang ◽  
Yung-Jung Hsu
Keyword(s):  
Charge Transfer ◽  
Electromagnetic Response ◽  
Charge Dynamics ◽  
Zno Nanocrystals

Correlations among Au content, SPR-mediated charge transfer and electromagnetic response, and the resultant photoactivity enhancement for ZnO–Au nanocrystals were established.

Extracting molecular responses from ultrafast charge dynamics at material interfaces

2020 ◽  
Vol 8 (35) ◽  
pp. 12062-12067
Author(s):  
Chenglai Wang ◽  
Yingmin Li ◽  
Wei Xiong
Keyword(s):  
Molecular Dynamics ◽  
Charge Transfer ◽  
Material Interfaces ◽  
Interfacial Charge Transfer ◽  
Molecular Responses ◽  
Charge Dynamics ◽  
Transfer Processes ◽  
Interfacial Charge

A method is developed and applied to transient VSFG spectroscopy, to retrieve molecular dynamics in complex interfacial charge transfer processes.

Plasmons in Photocharged ZnO Nanocrystals Revealing the Nature of Charge Dynamics

2013 ◽  
Vol 4 (18) ◽  
pp. 3024-3030 ◽  
Author(s):  
Jacob A. Faucheaux ◽  
Prashant K. Jain
Keyword(s):  
Charge Dynamics ◽  
Zno Nanocrystals

Plasmon induced ultrafast injection of hot electrons in Au nanoislands grown on a CdS film

2017 ◽  
Vol 5 (3) ◽  
pp. 618-626 ◽  
Author(s):  
Alka Sharma ◽  
Chhavi Sharma ◽  
Biplab Bhattacharyya ◽  
Kaweri Gambhir ◽  
Mahesh Kumar ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Hot Electrons ◽  
Charge Transfer Transition ◽  
Interfacial Charge Transfer ◽  
Transition Phenomenon ◽  
Charge Dynamics ◽  
Cds Film ◽  
Interfacial Charge

The ultrafast charge dynamics demonstrated in the Au–CdS film supports the plasmon induced interfacial charge transfer transition phenomenon.

A TTF–TCNQ complex: an organic charge-transfer system with extraordinary electromagnetic response behavior

2021 ◽  
Vol 9 (9) ◽  
pp. 3316-3323
Author(s):  
Lipeng Wu ◽  
Fan Wu ◽  
Qinya Sun ◽  
Jiaoyan Shi ◽  
Aming Xie ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Electromagnetic Response ◽  
Transfer System ◽  
Response Behavior ◽  
Molecular Conductors

Charge-transfer based molecular conductors have attracted great attention in recent years, but have been rarely explored in the field of electromagnetic materials.

Excited State Charge Transfer in Dyads of ZnO Nanocrystals and Organic or Transition Metal Dyes

2010 ◽  
Vol 1260 ◽  
Author(s):  
Julia E. Saunders ◽  
Adam S. Huss ◽  
Jon Bohnsack ◽  
Kent R. Mann ◽  
David A. Blank ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Room Temperature ◽  
Surface Coverage ◽  
Dye Molecules ◽  
Electron Transfer Mechanism ◽  
Dye Sensitized ◽  
Zno Nanocrystals ◽  
Carboxylate Groups ◽  
Ft Ir ◽  
State Charge

AbstractTo better understand the specific charge transfer events that occur within a dye-sensitized solar cell (DSSC), we synthesized well-defined ZnO:dye dyads. The ZnO nanocrystals were synthesized following literature procedures from zinc acetate and a hydroxide source in ethanol. The absorption onset of the ZnO nanocrystals was observed using UV-vis measurements, from which estimated nanocrystal diameters were determined. At room temperature, the synthesis yielded nanocrystals ranging in diameter from 2-4 nm. Dispersions of ZnO nanocrystals in ethanol were mixed with solutions containing 5΄΄-phenyl-3΄,4΄-di(nbutyl)-[2,2΄:5΄,2΄΄] terthiophene-5-carboxylic acid. Using FT-IR and fluorescence spectroscopy, it was verified that the dye molecules were adsorbed to the ZnO surface via their carboxylate groups while the number of dye molecules adsorbed to the surface was quantified using a combination of techniques. Adsorption isotherms were employed to probe surface coverage of the dye onto the nanocrystals to yield an adsorption equilibrium constant of 1.5 ± 0.2 x 105 M-1. The ability of ZnO nanocrystals to quench the emission of the dye by an electron transfer mechanism was observed and elucidated using ultra-fast laser spectroscopy where the time-scale for electron injection from the dye to the ZnO was determined to be 5.5 ps.

Metal-Particle-Decorated ZnO Nanocrystals: Photocatalysis and Charge Dynamics

2016 ◽  
Vol 8 (48) ◽  
pp. 32754-32763 ◽  
Author(s):  
Wei-Hao Lin ◽  
Yi-Hsuan Chiu ◽  
Pao-Wen Shao ◽  
Yung-Jung Hsu
Keyword(s):  
Metal Particle ◽  
Charge Dynamics ◽  
Zno Nanocrystals

Room Temperature Ferromagnetism in Al-doped/Al2O3-doped ZnO Film

2009 ◽  
Vol 1201 ◽  
Author(s):  
Yuwei Ma ◽  
Jun Ding ◽  
Min Ran ◽  
Xue Lian Huang ◽  
Chee Mang Ng
Keyword(s):  
Magnetic Property ◽  
Charge Transfer ◽  
Saturation Magnetization ◽  
Amorphous Phase ◽  
Room Temperature ◽  
Room Temperature Ferromagnetism ◽  
Zno Films ◽  
Zno Film ◽  
Zno Nanocrystals ◽  
Doped Zno

AbstractIn this manuscript, we study the magnetic property of Al-doped/Al2O3-doped ZnO films. We found that metallic Al-doped ZnO film shows room temperature ferromagnetism (RTFM). RTFM is correlated with the interaction of Al metallic clusters and ZnO matrix. The charge transfer has been observed between metallic Al and ZnO matrix. Therefore, RTFM in metallic Al doped ZnO may be highly probable due to charge transfer between metallic Al clusters and ZnO matrix. For Al2O3-doped ZnO film (denoted as (Zn1-x, Alx)O), RTFM was found in (Zn1-x, Alx)O film with a certain Al concentration range (16 mol%<x<50 mol%). The saturation magnetization is maximized in (Zn0.70, Al0.30)O film. The mechanism of RTFM can be explained as the interaction of ZnO nanocrystals (NCs) embedded in the amorphous phase and defects surrounding them.

Probing charge dynamics in bare and dye-sensitized ZnO nanocrystals with time-resolved XPS

2016 ◽  
Author(s):  
Stefan Neppl ◽  
Johannes Mahl ◽  
Andrey Shavorskiy ◽  
Hendrik Bluhm ◽  
Oliver Gessner
Keyword(s):  
Time Resolved ◽  
Charge Dynamics ◽  
Dye Sensitized ◽  
Zno Nanocrystals

Study of charge transfer in FeTi

1983 ◽  
Vol 41 ◽  
pp. 296-297
Author(s):  
J. Taft∅
Keyword(s):  
Charge Transfer ◽  
Charge Distribution ◽  
Electron Scattering ◽  
Periodic System ◽  
Electron Distribution ◽  
Scattering Amplitude ◽  
Transition Elements ◽  
Hartree Fock ◽  
Cscl Structure ◽  
The Right

It is well known that for reflections corresponding to large interplanar spacings (i.e., sin θ/λ small), the electron scattering amplitude, f, is sensitive to the ionicity and to the charge distribution around the atoms. We have used this in order to obtain information about the charge distribution in FeTi, which is a candidate for storage of hydrogen. Our goal is to study the changes in electron distribution in the presence of hydrogen, and also the ionicity of hydrogen in metals, but so far our study has been limited to pure FeTi. FeTi has the CsCl structure and thus Fe and Ti scatter with a phase difference of π into the 100-ref lections. Because Fe (Z = 26) is higher in the periodic system than Ti (Z = 22), an immediate “guess” would be that Fe has a larger scattering amplitude than Ti. However, relativistic Hartree-Fock calculations show that the opposite is the case for the 100-reflection. An explanation for this may be sought in the stronger localization of the d-electrons of the first row transition elements when moving to the right in the periodic table. The tabulated difference between fTi (100) and ffe (100) is small, however, and based on the values of the scattering amplitude for isolated atoms, the kinematical intensity of the 100-reflection is only 5.10-4 of the intensity of the 200-reflection.

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