[ppt]powerpoint presentation - penn state college of earth …ryba/coursework/advanced powder... ·...
TRANSCRIPT
![Page 1: [PPT]PowerPoint Presentation - Penn State College of Earth …ryba/coursework/Advanced Powder... · Web viewMoS2 - crystalline Nanocrystals Nanocrystals MoS2 - crystalline stuff w](https://reader036.vdocuments.site/reader036/viewer/2022062909/5b016e667f8b9ab9598c5298/html5/thumbnails/1.jpg)
Nanocrystals
MoS2 - crystalline
![Page 2: [PPT]PowerPoint Presentation - Penn State College of Earth …ryba/coursework/Advanced Powder... · Web viewMoS2 - crystalline Nanocrystals Nanocrystals MoS2 - crystalline stuff w](https://reader036.vdocuments.site/reader036/viewer/2022062909/5b016e667f8b9ab9598c5298/html5/thumbnails/2.jpg)
Nanocrystals
MoS2 - crystalline
stuff w/ Li to get LiMoS2
![Page 3: [PPT]PowerPoint Presentation - Penn State College of Earth …ryba/coursework/Advanced Powder... · Web viewMoS2 - crystalline Nanocrystals Nanocrystals MoS2 - crystalline stuff w](https://reader036.vdocuments.site/reader036/viewer/2022062909/5b016e667f8b9ab9598c5298/html5/thumbnails/3.jpg)
Nanocrystals
MoS2 - crystalline
Severely disrupts structure
Local structure well-defined, poor long range order
stuff w/ Li to get LiMoS2
![Page 4: [PPT]PowerPoint Presentation - Penn State College of Earth …ryba/coursework/Advanced Powder... · Web viewMoS2 - crystalline Nanocrystals Nanocrystals MoS2 - crystalline stuff w](https://reader036.vdocuments.site/reader036/viewer/2022062909/5b016e667f8b9ab9598c5298/html5/thumbnails/4.jpg)
Nanocrystals
MoS2 - crystalline
Severely disrupts structure
Local structure well-defined, poor long range order
Use PDF
stuff w/ Li to get LiMoS2
![Page 5: [PPT]PowerPoint Presentation - Penn State College of Earth …ryba/coursework/Advanced Powder... · Web viewMoS2 - crystalline Nanocrystals Nanocrystals MoS2 - crystalline stuff w](https://reader036.vdocuments.site/reader036/viewer/2022062909/5b016e667f8b9ab9598c5298/html5/thumbnails/5.jpg)
Nanocrystals
Lots of structure, but broad peaks, overlap
PDF oscillations die out
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Nanocrystals
Best structure model for LiMoS2 (Li not shown, Mo dark)
MoS2
Mo-S trigonal prisms ––> distorted octahedra
![Page 7: [PPT]PowerPoint Presentation - Penn State College of Earth …ryba/coursework/Advanced Powder... · Web viewMoS2 - crystalline Nanocrystals Nanocrystals MoS2 - crystalline stuff w](https://reader036.vdocuments.site/reader036/viewer/2022062909/5b016e667f8b9ab9598c5298/html5/thumbnails/7.jpg)
Nanocrystals
LiMoO2 similar to LiMoS2
except not nanocrystallineStd crystal structure detn carried out "successfully"
"PDF test" applied(radial distrib fcn shown)
![Page 8: [PPT]PowerPoint Presentation - Penn State College of Earth …ryba/coursework/Advanced Powder... · Web viewMoS2 - crystalline Nanocrystals Nanocrystals MoS2 - crystalline stuff w](https://reader036.vdocuments.site/reader036/viewer/2022062909/5b016e667f8b9ab9598c5298/html5/thumbnails/8.jpg)
Nanocrystals
LiMoO2 similar to LiMoS2
except not nanocrystallineStd crystal structure detn carried out "successfully"
"PDF test" applied(radial distrib fcn shown)
Corrected structureMo-Mo bonding similar to Li MoS2
![Page 9: [PPT]PowerPoint Presentation - Penn State College of Earth …ryba/coursework/Advanced Powder... · Web viewMoS2 - crystalline Nanocrystals Nanocrystals MoS2 - crystalline stuff w](https://reader036.vdocuments.site/reader036/viewer/2022062909/5b016e667f8b9ab9598c5298/html5/thumbnails/9.jpg)
Nanocrystals
V2O5•nH2O xerogel
ribbon-like particles - approx. 100 Å wide x 1 longNo Bragg peaks - some sharp features + lots of diffuse scattering
![Page 10: [PPT]PowerPoint Presentation - Penn State College of Earth …ryba/coursework/Advanced Powder... · Web viewMoS2 - crystalline Nanocrystals Nanocrystals MoS2 - crystalline stuff w](https://reader036.vdocuments.site/reader036/viewer/2022062909/5b016e667f8b9ab9598c5298/html5/thumbnails/10.jpg)
Nanocrystals
V2O5•nH2O xerogel
ribbon-like particles - approx. 100 Å wide x 1 longNo Bragg peaks - some sharp features + lots of diffuse scattering
V2O5•nH2O xerogel
V2O5
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Nanocrystals
V2O5•nH2O xerogel
ribbon-like particles - approx. 100 Å wide x 1 longNo Bragg peaks - some sharp features + lots of diffuse scattering
V2O5•nH2O xerogel - VO5
bi-layers approx. 11.5 Å apart w/ H2Os in betwn
V2O5 - ordered single layers of VO5 units
Stacking disorder in VO5
bi-layersRibbons curled & tangled
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QCs
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QCs
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QCs
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QCs