Computer Simulation of Singlet Fission in Single Crystalline Pentacene by Functional Mode Vibronic Theory

2017 ◽  
Vol 121 (21) ◽  
pp. 11159-11165 ◽  
Author(s):  
Justin E. Elenewski ◽  
Ulyana S. Cubeta ◽  
Edward Ko ◽  
Hanning Chen
Keyword(s):  
Computer Simulation ◽  
Singlet Fission ◽  
Single Crystalline ◽  
Functional Mode

Anisotropic Geminate and Non-Geminate Recombination of Triplet Excitons in Singlet Fission of Single Crystalline Hexacene

2020 ◽  
Vol 11 (4) ◽  
pp. 1261-1267 ◽  
Author(s):  
Jian Han ◽  
Qing Xie ◽  
Jun Luo ◽  
Gang-Hua Deng ◽  
Yuqin Qian ◽  
...  
Keyword(s):  
Geminate Recombination ◽  
Singlet Fission ◽  
Single Crystalline ◽  
Triplet Excitons

scholarly journals Anisotropic Singlet Fission in Single Crystalline Hexacene

iScience ◽  
2019 ◽  
Vol 19 ◽  
pp. 1079-1089 ◽  
Author(s):  
Dezheng Sun ◽  
Gang-Hua Deng ◽  
Bolei Xu ◽  
Enshi Xu ◽  
Xia Li ◽  
...  
Keyword(s):  
Singlet Fission ◽  
Single Crystalline

Functional Mode Singlet Fission Theory

2017 ◽  
Vol 121 (8) ◽  
pp. 4130-4138 ◽  
Author(s):  
Justin E. Elenewski ◽  
Ulyana S. Cubeta ◽  
Edward Ko ◽  
Hanning Chen
Keyword(s):  
Singlet Fission ◽  
Functional Mode

Singlet Fission Driven by Anisotropic Vibronic Coupling in Single-Crystalline Pentacene

2021 ◽  
pp. 3142-3150
Author(s):  
Gang-Hua Deng ◽  
Yuqin Qian ◽  
Xia Li ◽  
Tong Zhang ◽  
Wei Jiang ◽  
...  
Keyword(s):  
Vibronic Coupling ◽  
Singlet Fission ◽  
Single Crystalline

“Preparation of Single Crystalline Gold Films for ED Studies”

1972 ◽  
Vol 30 ◽  
pp. 634-635
Author(s):  
Joseph D. C. Peng
Keyword(s):  
Crystal Morphology ◽  
Diffraction Theory ◽  
Scattering Matrix ◽  
Vacuum Evaporation ◽  
Gold Films ◽  
Matrix Formulation ◽  
Silver Films ◽  
Single Crystalline ◽  
Grating Pattern ◽  
Stacking Disorder

The relative intensities of the ED spots in a cross-grating pattern can be calculated using N-beam electron diffraction theory. The scattering matrix formulation of N-beam ED theory has been previously applied to imperfect microcrystals of gold containing stacking disorder (coherent twinning) in the (111) crystal plane. In the present experiment an effort has been made to grow single-crystalline, defect-free (111) gold films of a uniform and accurately know thickness using vacuum evaporation techniques. These represent stringent conditions to be met experimentally; however, if a meaningful comparison is to be made between theory and experiment, these factors must be carefully controlled. It is well-known that crystal morphology, perfection, and orientation each have pronounced effects on relative intensities in single crystals.The double evaporation method first suggested by Pashley was employed with some modifications. Oriented silver films of a thickness of about 1500Å were first grown by vacuum evaporation on freshly cleaved mica, with the substrate temperature at 285° C during evaporation with the deposition rate at 500-800Å/sec.

Characterization of Modulated Structure Through Structure Images and their Computer Simulation

1990 ◽  
Vol 48 (1) ◽  
pp. 70-71
Author(s):  
Kiyomichi Nakai ◽  
Yusuke Isobe ◽  
Chiken Kinoshita ◽  
Kazutoshi Shinohara
Keyword(s):  
Computer Simulation ◽  
High Resolution ◽  
Spherical Aberration ◽  
High Resolution Electron Microscopy ◽  
Basic Mechanism ◽  
Objective Lens ◽  
Specimen Thickness ◽  
Transmitted Beam ◽  
Modulated Structure ◽  
Resolution Electron

Induced spinodal decomposition under electron irradiation in a Ni-Au alloy has been investigated with respect to its basic mechanism and confirmed to be caused by the relaxation of coherent strain associated with modulated structure. Modulation of white-dots on structure images of modulated structure due to high-resolution electron microscopy is reduced with irradiation. In this paper the atom arrangement of the modulated structure is confirmed with computer simulation on the structure images, and the relaxation of the coherent strain is concluded to be due to the reduction of phase-modulation.Structure images of three-dimensional modulated structure along <100> were taken with the JEM-4000EX high-resolution electron microscope at the HVEM Laboratory, Kyushu University. The transmitted beam and four 200 reflections with their satellites from the modulated structure in an fee Ni-30.0at%Au alloy under illumination of 400keV electrons were used for the structure images under a condition of the spherical aberration constant of the objective lens, Cs = 1mm, the divergence of the beam, α = 3 × 10-4 rad, underfocus, Δf ≃ -50nm and specimen thickness, t ≃ 15nm. The CIHRTEM code was used for the simulation of the structure image.

Averting robo-bees: why free-flying robotic bees are a bad idea

2019 ◽  
Vol 3 (6) ◽  
pp. 723-729
Author(s):  
Roslyn Gleadow ◽  
Jim Hanan ◽  
Alan Dorin
Keyword(s):  
Climate Change ◽  
Computer Simulation ◽  
Food Security ◽  
European Countries ◽  
Plant Interactions ◽  
Plant Insect Interactions ◽  
Native Habitat ◽  
Insect Pollinators ◽  
Insect Interactions

Food security and the sustainability of native ecosystems depends on plant-insect interactions in countless ways. Recently reported rapid and immense declines in insect numbers due to climate change, the use of pesticides and herbicides, the introduction of agricultural monocultures, and the destruction of insect native habitat, are all potential contributors to this grave situation. Some researchers are working towards a future where natural insect pollinators might be replaced with free-flying robotic bees, an ecologically problematic proposal. We argue instead that creating environments that are friendly to bees and exploring the use of other species for pollination and bio-control, particularly in non-European countries, are more ecologically sound approaches. The computer simulation of insect-plant interactions is a far more measured application of technology that may assist in managing, or averting, ‘Insect Armageddon' from both practical and ethical viewpoints.

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