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Sun, G.A.,Wang, X.L.,Wang, Y.D.,Woo, W.C.,Wang, H.,Liu, X.P.,Chen, B.,Fu, Y.Q.,Sheng, L.S.,Ren, Y. Elsevier Sequoia 2013 Materials science & engineering. properties, micro Vol.560 No.-
High-energy synchrotron X-ray diffraction technique was used to in-situ characterize microstructure, lattice strain, and phase transition behavior of a Ni<SUB>47</SUB>Ti<SUB>44</SUB>Nb<SUB>9</SUB> shape memory alloy. Phase transformation kinetics and deformation mechanisms were studied under a uniaxial tension at three testing temperatures, i.e., -70<SUP>o</SUP>C, 25<SUP>o</SUP>C, and 150<SUP>o</SUP>C. At a testing temperature of -70<SUP>o</SUP>C, a complicated phase transformation with four stages of micromechanical deformation was identified which is associated with changes of martensite substructures. At room temperature of 25<SUP>o</SUP>C, there was no stress-induced selection process of variants of B19' phases observed. Whereas at a testing temperature of 150<SUP>o</SUP>C, there was no any phase transformation observed. It is verified that β-Nb phase, an effective stabilizer for the austenite, delays the process of martensitic transformation and relaxes the strain energy without strengthening the matrix. This new finding is important to understand the relationship between the micromechanical deformation behavior and phase transformations in the Ni<SUB>47</SUB>Ti<SUB>44</SUB>Nb<SUB>9</SUB> SMA.
Wang, M.-Z.,Abe, K.,Abe, K.,Aihara, H.,Asano, Y.,Aulchenko, V.,Aushev, T.,Bahinipati, S.,Bakich, A.M.,Bedny, I.,Bitenc, U.,Bizjak, I.,Bozek, A.,Brax10d,ko, M.,Brodzicka, J.,Browder, T.E.,Chang, M.-C Elsevier 2005 Physics letters: B Vol.617 No.3
<P><B>Abstract</B></P><P>The angular distributions of the baryon–antibaryon low-mass enhancements seen in the charmless three-body baryonic <I>B</I> decays <SUP>B+</SUP>→pp¯<SUP>K+</SUP>, <SUP>B0</SUP>→pp¯KS0 and <SUP>B0</SUP>→pΛ¯<SUP>π−</SUP> are reported. A quark fragmentation interpretation is supported, while the gluonic resonance picture is disfavored. Searches for the <SUP>Θ+</SUP> and <SUP>Θ++</SUP> pentaquarks in the relevant decay modes and possible glueball states G with 2.2 GeV/<SUP>c2</SUP><<SUB>Mpp¯</SUB><2.4 GeV/<SUP>c2</SUP> in the pp¯ systems give null results. We set upper limits on the products of branching fractions, B(<SUP>B0</SUP>→<SUP>Θ+</SUP>p¯)B(<SUP>Θ+</SUP>→pKS0)<2.3×<SUP>10−7</SUP>, B(<SUP>B+</SUP>→<SUP>Θ++</SUP>p¯)B(<SUP>Θ++</SUP>→p<SUP>K+</SUP>)<9.1×<SUP>10−8</SUP>, and B(<SUP>B+</SUP>→G<SUP>K+</SUP>)B(G→pp¯)<4.1×<SUP>10−7</SUP> at the 90% confidence level. The analysis is based on a 140 fb<SUP>−1</SUP> data sample recorded on the ϒ(4S) resonance with the Belle detector at the KEKB asymmetric energy <SUP>e+</SUP><SUP>e−</SUP> collider.</P>
X. J. Chen,J. C. Xu,H. X. Jin,D. F. Jin,B. Hong,H. L. Ge,X. Q. Wang 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2017 NANO Vol.12 No.5
In this paper, ordered mesoporous SBA-15 silica was synthesized by the hydrothermal method, and then a series of CoFe2O4/SBA-15 nanocomposites were synthesized by a facile impregnation method. X-ray diffraction and N2 adsorption–desorption isotherms were used to characterize the microstructure and morphology of SBA-15 and CoFe2O4/SBA-15 nanocomposites. CoFe2O4 nanoparticles presented spinel phase structure and existed in the mesopores of SBA-15. The magnetic response of CoFe2O4/SBA-15 nanocomposites was characterized with vibrating sample magnetometer (VSM). The adsorption efficiency of CoFe2O4/SBA-15 nanocomposites for methylene blue increased firstly with the increasing CoFe2O4 content, and then decreased. Sample-2 (SBA-15: CoFe2O4 = 1: 0.1 in the precursor) not only presented the best adsorptive performance, but also could be separated and retrieved effectively by magnetic separation technique.
Measurement ofe+e−→π+π−ψ(2S)via initial state radiation at Belle
Wang, X. L.,Yuan, C. Z.,Shen, C. P.,Wang, P.,Abdesselam, A.,Adachi, I.,Aihara, H.,Al Said, S.,Arinstein, K.,Asner, D. M.,Ayad, R.,Bakich, A. M.,Bansal, V.,Bhuyan, B.,Bobrov, A.,Bonvicini, G.,Brax10d American Physical Society 2015 PHYSICAL REVIEW D - Vol.91 No.11
Wang, M.-Z.,Abe, K.,Abe, K.,Abe, T.,Adachi, I.,Aihara, H.,Asano, Y.,Aso, T.,Aulchenko, V.,Aushev, T.,Bakich, A. M.,Bay, A.,Bizjak, I.,Bondar, A.,Bozek, A.,Brax10d,ko, M.,Browder, T. E.,Chang, M.-C. American Physical Society 2004 Physical Review Letters Vol.92 No.13
<P>We report the first observation of a b-->u type charmless baryonic B decay, B+-->pppi(+), as well as b-->s type B0-->ppK0 and B+-->ppK(*+) decays. The analysis is based on a 78 fb(-1) data sample recorded on the Upsilon(4S) resonance with the Belle detector at KEKB. We find B(B+-->pppi(+))=(3.06(+0.73)(-0.62)+/-0.37)x10(-6), B(B0-->ppK0)=(1.88(+0.77)(-0.60)+/-0.23)x10(-6), and B(B+-->ppK(*+))=(10.3(+3.6+1.3)(-2.8-1.7))x10(-6). We also update B(B+-->ppK+)=(5.66(+0.67)(-0.57)+/-0.62)x10(-6) and present an upper limit on B(B0-->ppK(*0)) at the 90% confidence level. A common feature of the observed decay modes is threshold peaking in baryon pair invariant mass.</P>
Ren, X.Y.,Zhao, C.X.,Niu, C.Y.,Wang, J.Q.,Jia, Y.,Cho, J.H. North-Holland 2016 Physics letters. Section A. Vol.380 No.46
<P>As the analog of carbon allotropes, new three-dimensional (3D) boron nitride (BN) allotropes have attracted much attention of researchers due to their great importance in fundamental sciences and wide practical applications. Here, based on first-principles density-functional theory calculations, we predict two new stable BN allotropes: One is H-18-BN with the P (6) over bar m2 (D-3h(1)) symmetry containing eighteen atoms in the hexagonal unit cell and the other is Rh6-BN with the R (3) over barm (C-3v(5)) symmetry containing six atoms in the rhombohedral primitive unit cell. The dynamic stabilities of the two structures are examined through the phonon spectrum analysis as well as molecular dynamics simulations, whereas the mechanical properties are analyzed by elastic constants, bulk modulus and shear modulus. From the analysis of the enthalpy evolution with respect to pressure, we find that h-BN can be transformed into either H-18-BN or RH6-BN structure under a higher pressure of similar to 15 GPa. We also find that both the H-18-BN and Rh6-BN allotropes are brittle materials with indirect band gaps of 2.31 and 4.48 eV, respectively. The simulated XRD spectra provide detailed structural information of H-18-BN and Rh6-BN for future experimental examinations. Our findings not only greatly enrich the existing structural family of 3D-BN materials but also stimulate further experiments. (C) 2016 Elsevier B.V. All rights reserved.</P>
SYNTHESIS AND FIELD EMISSION PROPERTIES OF SnS_2 AND In-DOPED SnS_2 WITH HIERARCHICAL STRUCTURE
H. X. ZHONG,C. X. WANG 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2011 NANO Vol.6 No.5
A simple hydrothermal route was employed to prepare flower-like SnS_2 and In-doped SnS_2 by using biomolecular L-cysteine as sulfur source. The synthetic samples were characterized by X-ray diffraction, scanning electron microscopy, high resolution transmission electron microscopy, X-ray photoelectron spectroscopy and Raman spectroscopy in detail. Furthermore, the field emission from both the materials was investigated, it was found that both of them have excellent field emission properties, and the doped In has enhanced the field emission properties.
Updated cross section measurement ofe+e−→K+K−J/ψandKS0KS0J/ψvia initial state radiation at Belle
Shen, C. P.,Yuan, C. Z.,Wang, P.,Abdesselam, A.,Adachi, I.,Aihara, H.,Al Said, S.,Asner, D. M.,Aulchenko, V.,Aushev, T.,Ayad, R.,Bakich, A. M.,Bala, A.,Bobrov, A.,Bonvicini, G.,Bozek, A.,Brax10d,ko, American Physical Society 2014 PHYSICAL REVIEW D - Vol.89 No.7
Chen, P.,Tian, Q.,Baek, S.J.,Shang, X.L.,Park, A.,Liu, Z.C.,Yao, X.Q.,Wang, J.Z.,Wang, X.H.,Cheng, Y.,Peng, J.,Shen, A.G.,Hu, J.M. WILEY‐VCH Verlag 2011 Laser physics letters Vol.8 No.7
<P><B>Abstract</B></P><P>Early and differential diagnosis of Alzheimer's disease (AD) is a problem that puzzled many doctors. Reliable markers in easy‐assembling samples are of considerable clinical diagnostic value. In this work, laser Raman spectroscopy (LRS) was developed a new method that potentially allows early and differential diagnosis of AD from the platelet sample. Raman spectra of platelets isolated from different ages of AD transgenic mice and non‐transgenic controls were collected and analyzed. Multilayer perceptron networks (MLP) classification method was used to classify spectra and establish the diagnostic models. For differential diagnosis, spectra of platelets isolated from AD, Parkinson’s disease (PD) and vascular dementia (VD) mice were also discriminated. Two notable spectral differences at 740 and 1654 cm<SUP>–1</SUP> were revealed in the mean spectrum of platelets isolated from AD transgenic mice and the controls. MLP displayed a powerful ability in the classifying of early, advanced AD and the control group, and in differential diagnosis of PD and advanced AD, as well as VD and advanced AD. The results suggest that platelet detecting by LRS coupled with MLP analysis appears to be an easy and accurate method for early and differential diagnosis of AD. This technique could be rapidly promoted from laboratory to the hospital. (© 2011 by Astro Ltd., Published exclusively by WILEY‐VCH Verlag GmbH & Co. KGaA) (© 2011 by Astro Ltd., Published exclusively by WILEY‐VCH Verlag GmbH & Co. KGaA)</P>