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1. chinaXiv:201705.00242 [pdf]

Improving thermal and mechanical properties of epoxy composites by using functionalized graphene

Pan, LL [Pan, Lulu][ 1 ]; Ban, JF [Ban, Jianfeng][ 3 ]; Lu, SR [Lu, Shaorong][ 1 ]; Chen, GX [Chen, Guoxin][ 2 ]; Yang, J [Yang, Jin][ 1 ]; Luo, QY [Luo, Qiyun][ 1 ]; Wu, LY [Wu, Linyan][ 1 ]; Yu, JH [Yu, Jinhong][ 1,2 ]
Subjects: Materials Science >> Materials Science (General)

Perylene tetracarboxylic anhydride (PTCDA) was reacted with 6-aminocaproic acid to form the corresponding perylene bisimide (PBI). PBI was used as the foundation for oligomerisation of glycidol in a ring-opening reaction of glycidol leading to a hyper branched, water-soluble glycidol derivative of perylene (PBI-HPG). PBI-HPG was bound to the reduced graphene oxide via p–p stacking resulting in a compound termed PBI-HPG/RGO. The structure and morphology of PBI-HPG/RGO were investigated by infrared spectroscopy (FT-IR), wide angle X-ray diffractometry (WAXD), transmission electron microscopy (TEM), atomic force microscopy (AFM) and X-ray photoelectron spectroscopy (XPS). PBI- HPG/RGO was blended at different loadings in order to improve the thermal and mechanical properties of epoxy composites. The maximum Tg of the epoxy composites was about 20 C and the decomposition temperature (Td) was 26 C higher than that of neat epoxy. The incorporation of PBI- HPG/RGO yields a material with an impact strength of 39.6 kJ m 2 and a tensile strength at 0.7 wt%. It increased by 50.8% and 62.3%, respectively, compared to the neat epoxy.

submitted time 2017-05-09 Hits15866Downloads1212 Comment 0

2. chinaXiv:201705.00507 [pdf]

Carbon nanofiber bridged two-dimensional titanium carbide as a superior anode for lithium-ion batteries

Lin, ZY [Lin, Zongyuan][ 1 ]; Sun, DF [Sun, Dongfei][ 1 ]; Huang, Q [Huang, Qing][ 2 ]; Yang, J [Yang, Jun][ 1 ]; Barsoum, MW [Barsoum, Michel W.][ 3,4 ]; Yan, XB [Yan, Xingbin][ 1 ]
Subjects: Physics >> General Physics: Statistical and Quantum Mechanics, Quantum Information, etc.

MXenes, a novel family of two-dimensional metal carbides, are receiving intense attention for lithium-ion batteries (LIBs) and super- capacitors because they have high volumetric capacitance exceeding all carbon materials. However, serious interlayer stacking exists in MXene particles, which greatly decreases the electrical conductivity in the bulk and hinders the accessibility of interlayers to electrolyte ions. Thus, multi-stacked MXene particles exhibit low capacitance and poor rate capability. Herein, we report an effective strategy to directly improve the electrochemical performance of multi-stacked MXene (Ti3C2Tx) particles as LIB anode materials. It was successfully realized by growing conductive “carbon nanofiber (CNF) bridges” within the gaps of each Ti3C2Tx particle as well as the outside. With the help of these CNFs, the as-prepared Ti3C2/CNF particles exhibited signifi- cantly improved reversible capacity compared with pure Ti3C2Tx particles. More remarkably, even at an ultrahigh rate of 100 C, the capacity of Ti3C2/CNF hybrid particles was just slightly lower than that of pure Ti3C2Tx particles at 1 C, and there was no capacity decay after 2900 cycles at 100 C, demonstrating excellent rate capability and superior long-term stability at the ultrahigh rate.

submitted time 2017-05-02 Hits1039Downloads551 Comment 0

3. chinaXiv:201704.00100 [pdf]

The electrochemical self-assembly of hierarchical dendritic Bi2Se3 nanostructures

Han, C; Yang, J; Yan, C; Li, Y; Liu, FY; Jiang, LX; Ye, JC; Liu, YX
Subjects: Physics >> General Physics: Statistical and Quantum Mechanics, Quantum Information, etc.

Bismuth selenide (Bi2Se3) has proven to be an important material in thermoelectric and topological insulator applications. We report here a simple electrochemical self-assembly route for the preparation of well-defined hierarchical dendritic Bi2Se3 nanost

submitted time 2017-04-06 Hits1413Downloads780 Comment 0

4. chinaXiv:201612.00461 [pdf]

Dark matter in the MSSM and its singlet extension


We briefly review the supersymetric explanation for the cosmic dark matter. Although the neutralino in the minimal supersymmetric model (MSSM), the next-to-minimal supersymmetric model (NMSSM) and the nearly minimal supersymmetric model (nMSSM) can natura

submitted time 2016-12-28 Hits1431Downloads837 Comment 0

5. chinaXiv:201612.00391 [pdf]

Strong supersymmetric quantum effects on top quark production at the Fermilab Tevatron

Li,C; Zhou,H; Zhu,Y; Yang,J

The supersymmetric QCD corrections to top quark pair production by qq ? anni- hilation in pp ? collisions are calculated in the minimal supersymmetric model. We consider effects of the mixing of the scalar top quarks on the corrections to the total tt ?production cross section at the Fermilab Tevatron. We found that such correction is less sensitive to squark mass and gluino mass than in no-mixing case, and in both cases the corrections can exceed 10% even if we consider the recent CDF limit on squark and gluino masses.

submitted time 2016-12-28 Hits1495Downloads828 Comment 0

6. chinaXiv:201612.00389 [pdf]

Yukawa corrections to top pair production in photon-photon collision

Li,C; Yang,J; Zhu,Y; Zhou,H

The O(αmt 2/mW 2)O(αmt 2/mW 2)O(\alpha m_t~2/m_W~2) Yukawa corrections to top pair production in photon-photon collision are calculated in the standard model (SM), the general two-Higgs-doublet model (2HDM) as well as the minimal supersymmetric model (MSS

submitted time 2016-12-28 Hits1391Downloads761 Comment 0

7. chinaXiv:201612.00385 [pdf]

Dimension-six CP conserving operators of the third family quarks and their effects on collider observables

Whisnant,K; Yang,J; Young,B; Zhang,X

We list all possible dimension-six CP-conserving SUc(3)×SUL(2)×UY(1)SUc(3)×SUL(2)×UY(1)SU_c(3)\times SU_L(2) \times U_Y(1) invariant operators involving the third-family quarks which could be generated by new physics at a higher scale. Expressions for the

submitted time 2016-12-28 Hits1518Downloads819 Comment 0

8. chinaXiv:201612.00382 [pdf]

Supersymmetric QCD corrections to single top quark production at the Fermilab Tevatron

Li,C; Oakes,RJ; Yang,J; Zhou,H

We evaluate the supersymmetric QCD corrections to single top quark production via qq?′→tb?qq?′→tb?q \bar q'\to t \bar b at the Fermilab Tevatron in the minimal supersymmetric model. We find that within the allowed range of squark and gluino masses the sup

submitted time 2016-12-28 Hits1611Downloads904 Comment 0

9. chinaXiv:201612.00379 [pdf]

Top quark at the upgraded Tevatron to probe new physics

Yang,J; Datta,A; Hosch,M; Li,C; Oakes,R; Whisnant,K; Young,B; Zhang,X

This talk is a brief review of the recent studies on probing new physics through single top quark processes and probing exotic top quark decays at the upgraded Tevatron.

submitted time 2016-12-28 Hits1834Downloads925 Comment 0

10. chinaXiv:201612.00378 [pdf]

Effective CP violating operators of the tau lepton and some of their phenomenologies

Huang,T; Yang,J; Young,B; Zhang,X

The dimension-six CP-violating SU_L(2)\times U_Y(1) invariant operators involving the tau lepton are studied. The constraints from the available experimental data on tau dipole moments are derived. Under the current constraints, the induced CP-violating e

submitted time 2016-12-28 Hits1632Downloads902 Comment 0

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