The organic salt, (H2Bpy)(cda)2, was synthesized by the reaction of sodium car- bamyldicyanomethanide, 4,4-bipyridyl and manganese(II) perchlorate in water solution. The crystal belongs to monoclinic, space group C2/c...The organic salt, (H2Bpy)(cda)2, was synthesized by the reaction of sodium car- bamyldicyanomethanide, 4,4-bipyridyl and manganese(II) perchlorate in water solution. The crystal belongs to monoclinic, space group C2/c with a = 20.333(7), b = 6.177(2), c = 15.566(5) ? b = 116.860(5), V = 1744(1) ?, Z = 4, C18H14N8O2 (Mr = 374.37), Dc = 1.426 g/cm3, F(000) = 776, m = 0.100 mm-1 and l = 0.71073 ? The structure was refined to R = 0.0560 and wR = 0.1072 for 590 observed reflections (I > 2s(I)). Two nitrogen atoms of the 4,4?bipyridyl molecule bonded to two hydrogen ions, resulting this neutral molecule into a divalent cation. Through the interaction of colorless H2bpy cation and colorless cda anion the red neutral organic salt was formed.展开更多
200keV Hg ions were implanted in potassium titanyl phosphate (KTiOPO4 or KTP) at different angles of 0°，45°,60°and 75°,The lateral spread of Hg ions in KTP was measured by Rutherford backscatterin...200keV Hg ions were implanted in potassium titanyl phosphate (KTiOPO4 or KTP) at different angles of 0°，45°,60°and 75°,The lateral spread of Hg ions in KTP was measured by Rutherford backscattering of 2.1 MeV He ions.The obtained results are compared with the transport of ions in matter(TRIM'89) prediction.The lateral spread is found in a good agreement with TRIM'89 prediction.展开更多
The optical parameters for three samples of intrinsic, doped Si and doped Mg (Al x Ga 1- x ) y In 1- y P prepared by the MOCVD on GaAs substrate were measured by using ellipsometry and were calc...The optical parameters for three samples of intrinsic, doped Si and doped Mg (Al x Ga 1- x ) y In 1- y P prepared by the MOCVD on GaAs substrate were measured by using ellipsometry and were calculated by the two-layer absorption film model. The results obtained were discussed. The grown rates and thickness of oxidic layer on the intrinsic (Al x Ga 1- x ) y In 1- y P surface exposed in the atmosphere were studied. A linear dependence of oxidic layer thickness on the time was obtained.展开更多
A simple setup for the measurement of transmission loss in polymer thin film optical waveguides is described. A new electro-optic polymer film has been prepared. The transmission loss of the film is measured before an...A simple setup for the measurement of transmission loss in polymer thin film optical waveguides is described. A new electro-optic polymer film has been prepared. The transmission loss of the film is measured before and after corona poling. And the loss is determined to be 1.84 dB/cm and 2.14 dB/cm, respectively.展开更多
The recent research work on domain structures and their dynamics in fenoelastic and ferroelectric crystals by white-beam synchrotron radiation topography is summarized.The real-time imaging,fine-beam Laue diffraction,...The recent research work on domain structures and their dynamics in fenoelastic and ferroelectric crystals by white-beam synchrotron radiation topography is summarized.The real-time imaging,fine-beam Laue diffraction,and anomalous-scattering topography were carried out to the study of the domain structures and phase transition in the ferroelastic NdP5O14 and LaP5O14,and ferroelectric KTa1-xNbxO3,(Ba0.25Sr0.75)0.9(K0.5Na0.5)0.2Nb2O6,and KTiOPO4 crystals.Some preliminary results are presented and discussed.展开更多
In-situ white-beam synchrotron radiation topographic observations under an electric field have been made on KTiOPO4 family crystals.The investigation shows a strong enhancement of diffracted intensity of hkl reflectio...In-situ white-beam synchrotron radiation topographic observations under an electric field have been made on KTiOPO4 family crystals.The investigation shows a strong enhancement of diffracted intensity of hkl reflections(l≠0) and the topographic extinction contrast,when the field is applied along the polar axis.Doped and undoped samples with grown-in defects are studied in detail.It is believed that the movement of K^+ ions driven by the field leads to a local accumulation of charges and the lattice distortion.All the field-related phenomena appear to be related to the one-dimensional ionic conductance.展开更多
基金This work was supported by the National Natural Science Foundation of China (20271043) and the Natural Science Foundation of Shandong province(y2002B10)
文摘The organic salt, (H2Bpy)(cda)2, was synthesized by the reaction of sodium car- bamyldicyanomethanide, 4,4-bipyridyl and manganese(II) perchlorate in water solution. The crystal belongs to monoclinic, space group C2/c with a = 20.333(7), b = 6.177(2), c = 15.566(5) ? b = 116.860(5), V = 1744(1) ?, Z = 4, C18H14N8O2 (Mr = 374.37), Dc = 1.426 g/cm3, F(000) = 776, m = 0.100 mm-1 and l = 0.71073 ? The structure was refined to R = 0.0560 and wR = 0.1072 for 590 observed reflections (I > 2s(I)). Two nitrogen atoms of the 4,4?bipyridyl molecule bonded to two hydrogen ions, resulting this neutral molecule into a divalent cation. Through the interaction of colorless H2bpy cation and colorless cda anion the red neutral organic salt was formed.
基金Supported by National Natural Science Fundation of China
文摘200keV Hg ions were implanted in potassium titanyl phosphate (KTiOPO4 or KTP) at different angles of 0°，45°,60°and 75°,The lateral spread of Hg ions in KTP was measured by Rutherford backscattering of 2.1 MeV He ions.The obtained results are compared with the transport of ions in matter(TRIM'89) prediction.The lateral spread is found in a good agreement with TRIM'89 prediction.
文摘The optical parameters for three samples of intrinsic, doped Si and doped Mg (Al x Ga 1- x ) y In 1- y P prepared by the MOCVD on GaAs substrate were measured by using ellipsometry and were calculated by the two-layer absorption film model. The results obtained were discussed. The grown rates and thickness of oxidic layer on the intrinsic (Al x Ga 1- x ) y In 1- y P surface exposed in the atmosphere were studied. A linear dependence of oxidic layer thickness on the time was obtained.
文摘A simple setup for the measurement of transmission loss in polymer thin film optical waveguides is described. A new electro-optic polymer film has been prepared. The transmission loss of the film is measured before and after corona poling. And the loss is determined to be 1.84 dB/cm and 2.14 dB/cm, respectively.
文摘The recent research work on domain structures and their dynamics in fenoelastic and ferroelectric crystals by white-beam synchrotron radiation topography is summarized.The real-time imaging,fine-beam Laue diffraction,and anomalous-scattering topography were carried out to the study of the domain structures and phase transition in the ferroelastic NdP5O14 and LaP5O14,and ferroelectric KTa1-xNbxO3,(Ba0.25Sr0.75)0.9(K0.5Na0.5)0.2Nb2O6,and KTiOPO4 crystals.Some preliminary results are presented and discussed.
文摘In-situ white-beam synchrotron radiation topographic observations under an electric field have been made on KTiOPO4 family crystals.The investigation shows a strong enhancement of diffracted intensity of hkl reflections(l≠0) and the topographic extinction contrast,when the field is applied along the polar axis.Doped and undoped samples with grown-in defects are studied in detail.It is believed that the movement of K^+ ions driven by the field leads to a local accumulation of charges and the lattice distortion.All the field-related phenomena appear to be related to the one-dimensional ionic conductance.
