材料期刊网

OPTICAL PROPERTIES OF GeO 2 AND Ge NANOCRYSTALS

Y.H.Zhou 1) , Y.Y.Feng 2) and H.Y.Lu 2) 1)Department of Physics Nanjing Normal University , Nanjing 210097 , China 2)Physics and Ch寁O P T I C A L P R O P E R T I E S O F Ge O2 A N D Ge N A N O C R Y S T A L S Y. H. Zhou1) , Y. Y. Feng2) and H. Y. Lu2)1) Department of Physics Nanjing Normal University , Nanjing 210097 , China2) Physics and Chemical Centralab Nanjing Normal University , Nanjing 210097 , China

金属学报(英文版)

he co m pound m aterial of n m size particles Ge O2 Si O2 w as synthesied through hydrolysis of Si( O C2 H4) and Ge Cl4 . A heat treatm ent w as carried out for the sa m ples at 100 ～1200 ℃in air . Its optical property w as deter mined by U V Vis spectur m . We have found that theabsorption edge of spectru m shifted progressively to longer w avelengths . The quantu m size ef fect of nanocrystals appears because crystals gro w and energy of optical band gap reduces d ueto the influence of te m perature . By the analysis of X ray diffraction w e have observed theprocess in w hich the structure of particles changed fro m disorder into order .

关键词: nano m aterial , null