scholarly journals 1P234 Orientational Properties of New Bicelle Composed of Un-, and Saturated Phosphatidylcholine as Studied by Solid State NMR Spectroscopy(Biol & Artifi memb.:Structure & Property,The 48th Annual Meeting of the Biophysical Society of Japan)

2010 ◽  
Vol 50 (supplement2) ◽  
pp. S60
Author(s):  
naoko uekama ◽  
katsuyuki nishimura
Keyword(s):  
Solid State ◽  
Nmr Spectroscopy ◽  
Annual Meeting ◽  
Solid State Nmr ◽  
Structure Property ◽  
Solid State Nmr Spectroscopy ◽  
Biophysical Society

scholarly journals Polar surface structure of oxide nanocrystals revealed with solid-state NMR spectroscopy

2019 ◽  
Vol 10 (1) ◽  
Author(s):  
Junchao Chen ◽  
Xin-Ping Wu ◽  
Michael A. Hope ◽  
Kun Qian ◽  
David M. Halat ◽  
...  
Keyword(s):  
Solid State ◽  
Nmr Spectroscopy ◽  
Surface Structure ◽  
Solid State Nmr ◽  
Structural Information ◽  
Structure Property ◽  
Surface Polarity ◽  
Low Contrast ◽  
Polar Surface ◽  
Solid State Nmr Spectroscopy

AbstractCompared to nanomaterials exposing nonpolar facets, polar-faceted nanocrystals often exhibit unexpected and interesting properties. The electrostatic instability arising from the intrinsic dipole moments of polar facets, however, leads to different surface configurations in many cases, making it challenging to extract detailed structural information and develop structure-property relations. The widely used electron microscopy techniques are limited because the volumes sampled may not be representative, and they provide little chemical bonding information with low contrast of light elements. With ceria nanocubes exposing (100) facets as an example, here we show that the polar surface structure of oxide nanocrystals can be investigated by applying 17O and 1H solid-state NMR spectroscopy and dynamic nuclear polarization, combined with DFT calculations. Both CeO4-termination reconstructions and hydroxyls are present for surface polarity compensation and their concentrations can be quantified. These results open up new possibilities for investigating the structure and properties of oxide nanostructures with polar facets.

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