7LiNMR STUDY ON SURFACE IONIC DIFFUSION IN NANOCRYSTALLINELiNbO3

Yao Yu, Min Gu (), Lili Zhang, Tong B. Tang, Zhaosheng Li and Tao Yu
Additional contact information
Yao Yu: National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing 210093, P. R. China
Min Gu: National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing 210093, P. R. China
Lili Zhang: National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing 210093, P. R. China
Tong B. Tang: Department of Physics, Hong Kong Baptist University, Kowloon, Hong Kong SAR, P. R. China
Zhaosheng Li: Ecomaterials and Renewable Energy Research Center, National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing 210093, P. R. China
Tao Yu: Ecomaterials and Renewable Energy Research Center, National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing 210093, P. R. China

Surface Review and Letters (SRL), 2007, vol. 14, issue 04, 583-586

Abstract: By a wet chemical method we have prepared nano-LiNbO3with different crystallite sizes. Their7LiNMR spectra each show, on top of a broad band accompanied by two satellites, a sharp central peak whose strength decreases with growing grain size. On the other hand, for a given sample and as temperature rises, the separation between the two satellites gets wider, but the sharp peak gets narrower. From the satellite splitting we may estimate the molar ratio[Li]/[Nb]inside the nanocrystals, and this ratio is seen to be nearer to unity in a sample of smaller grain size. The sharp peak, indiscernible in bulk (mono- or microcrystalline)LiNbO3, is attributed toLiions in the disproportionally large surface regions of our samples. The narrowness of its linewidth arises from the fast diffusion of these ions caused by high oxygen deficiency on the surface.

Keywords: NanocrystallineLiNbO3; quadrupole splitting; motional narrowing; diffusion (search for similar items in EconPapers)
Date: 2007
References: View complete reference list from CitEc
Citations:

Downloads: (external link)
http://www.worldscientific.com/doi/abs/10.1142/S0218625X07009888
Access to full text is restricted to subscribers

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:wsi:srlxxx:v:14:y:2007:i:04:n:s0218625x07009888

Ordering information: This journal article can be ordered from

DOI: 10.1142/S0218625X07009888

Access Statistics for this article

Surface Review and Letters (SRL) is currently edited by S Y Tong

More articles in Surface Review and Letters (SRL) from World Scientific Publishing Co. Pte. Ltd.
Bibliographic data for series maintained by Tai Tone Lim ().