Search results for: Xin-Jun Wang

Items from 1 to 20 out of 31 results

article

Spin filter type transformation in Sn-phthalocyanine

Chen-Chen Zhao, Shi-Hua Tan, Xiao-Fang Peng, Xin-Jun Wang, more

Organic Electronics > 2017 > 43 > C > 47-54

We have investigated the electronic transport properties of Sn-phthalocyanine (SnPc) by using nonequilibrium Green's functions in combination with the density functional theory. The results show that, the spin-up/spin-down PDOS peak at 0.74 eV of SnPc will firstly move toward to the Fermi level and then be away from the Feimi level as the Sn atom is pulled out. A transform from spin-down filter to...

article

Half-metallicity and high spin-filtering effect of magnetic atoms embedded zigzag 6, 6, 12-graphyne nanoribbon

Chen-Chen Zhao, Shi-Hua Tan, Yan-Hong Zhou, Rong-Ji Wang, more

Carbon > 2017 > 113 > C > 170-175

We investigate the effects of embedded magnetic atoms on the edge states and spin-dependent transport properties of zigzag 6, 6, 12-graphyne nanoribbon (6, 6, 12-Z GYNRs) using non-equilibrium Greens functions combined with density-function theory. The results show that spin splitting occurs when doping magnetic atoms in the natural “holes” of the 6, 6, 12-Z GYNRs. Particularly, the half-metallicity...

article

Thermal conductance in graphene nanoribbons modulated by defects and alternating boron-nitride structures

Xiao-Fang Peng, Xin Zhou, Shi-Hua Tan, Xin-Jun Wang, more

Carbon > 2017 > 113 > C > 334-339

The thermal transport properties of phonons in zigzag graphene nanoribbon (ZGNR) modulated by defect and alternating boron-nitride structure (BNS) are studied by nonequilibrium Greens function (NEGF) formalism combined with first-principles calculations of density-functional theory with local density approximation. Our calculations show that the thermal conductance in ZGNR with BNS is higher than...

article

Optical properties of a metallic nanoparticle array covered by a reduced cytochrome c molecule layer

Yu-Xiang Peng, Kai-Jun Wang, Xin-Min Zhang, Ying Wang, more

Optical and Quantum Electronics > 2016 > 48 > 12 > 1-11

We investigate the optical properties of a metallic nanoparticle array covered by a reduced cytochrome (Cyt) c molecule layer by using the finite-difference time-domain method . As the wavelength of the surface plasmon resonance of metallic nanoparticle array matches with that of the absorption peak of reduced Cyt c molecules, a pronounced spectral dip forms in extinction spectrum due to the plasmon...

article

Tunable ballistic thermal conductance of electrons in strained graphene nanoribbons

Xiao-Fang Peng, Ke-Qiu Chen, Xin-Jun Wang, Shi-Hua Tan

Carbon > 2016 > 100 > C > 36-41

The thermal transport properties of electrons in graphene nanoribbon (GNR) subjected to strain fields are studied by non-equilibrium Green's function approach. The results show that the stretching of the carbon–carbon bond in strained GNR can enhance the ballistic thermal conductance of electrons. The enhancement originates from that the change of C–C bond length can modulate the nearest-neighbour...

article

Plasmon Resonances in a Periodic Square Coaxial Hole Array in a Graphene Sheet

Kai-Jun Wang, Yu-Xiang Peng, Lei Wang, Meng-Dong He, more

Plasmonics > 2016 > 11 > 4 > 1129-1137

We present a computational study of the plasmon resonances in a periodic square coaxial hole array in a graphene sheet, which consists of a square hole array and a square strip array. According to charge oscillation picture, we find that a new plasmon mode, which locates on the edges of square hole along the polarization direction of incident light, emerges in our proposed structure. Two hybridized...

article

Plasmon Resonances in a Stacked Pair of Periodic Graphene Hole Arrays

Kai-Jun Wang, Meng-Dong He, Wang-Guo Ma, Lei Wang, more

Plasmonics > 2015 > 10 > 6 > 1695-1702

In this paper, we investigate the plasmon resonances in a stacked pair of periodic graphene hole arrays by using charge oscillation picture. It is found that the plasmon resonances can be controlled by changing the longitudinal interval G between two arrays, and the lateral displacements L _x and L _y, which are parallel and perpendicular to the polarization direction of the incident light, respectively...

article

A tunable bistable device based on a coupled quantum dot–metallic nanoparticle nanosystem

Jian-Bo Li, Shan Liang, Meng-Dong He, Li-Qun Chen, more

Applied Physics B > 2015 > 120 > 1 > 161-166

We theoretically propose a scheme of a tunable bistable device based on a coupled semiconductor quantum dot–metal nanoparticle nanosystem in the simultaneous presence of a strong pump laser and a weak probe laser with different frequencies. The results show that it is easy to turn on or off the optical bistable effect in such system by switching the polarization direction of the pump field, and the...

article

Evaluation of TAZ expression and its effect on tumor invasion and metastasis in human glioma

Pei-Dong Li, Xin-Jun Wang, Qiao Shan, Yue-Hui Wu, more

Asian Pacific Journal of Tropical Medicine > 2014 > 7 > 10 > 757-760

To evaluate the expression of TAZ and its role in tumor invasion and metastasis in human glioma. The expression of TAZ protein was measured in 48 samples of surgically resected human glioma and 13 samples of normal brain tissues using immunohistochemistry. TAZ was knocked down by a retrovirus-mediated TAZ shRNA in a glioma cell line, SNB19. Transwell cell migration and invasion assays were used...

article

Thermal conductance associated with six types of vibration modes in quantum wire modulated with quantum dot

Xiao-Fang Peng, Xin-Jun Wang, Li-Qun Chen, Jian-Bo Li, more

Physics Letters A > 2014 > 378 > 30-31 > 2195-2200

We study the ballistic phonon transport and thermal conductance of six low-lying vibration modes in quantum wire modulated with quantum dot at low temperatures. A comparative analysis is made among the six vibrational modes. The results show that the transmission rates of the six vibrational modes relative to reduced frequency display periodic or quasi-periodic oscillatory behavior. Among the four...

article

Diesel Engine PT Pump Fault Diagnosis based on the Characteristics of its Fuel Pressure

Xin-jun Wang, Yan-ping Cai, Xu-ze Lin

IERI Procedia > 2014 > 7 > Complete > 84-89

In order to solve the problem that the diesel engine PT fuel system is unable to field maintain, developed a portable signal acquisition and analysis system for diesel engine PT fuel system. Firstly, the PT pump work Principle was analyzed, and the PT pump failure mapping relation between reason and failure phenomenon was analyzed; Secondly, the diesel engine PT pump failure fuel pressure characteristics...

article

Two proton-conductive hybrids based on 2-(3-pyridyl)benzimidazole molecules and Keggin-type heteropolyacids

Mei-Lin Wei, Yu-Xia Wang, Xin-Jun Wang

Journal of Solid State Chemistry > 2014 > 209 > Complete > 29-36

Two proton-conductive organic/inorganic complexes were constructed by Keggin-type heteropolyacids and 2-(3-pyridyl)benzimidazole molecules. Single-crystal X-ray diffraction analyses revealed that two complexes crystallized in the monoclinic space group P2 ₁ /c, exhibited different unit cell parameters, and presented different hydrogen-bonded networks constructed by 2-(3-pyridyl)benzimidazole...

article

Controllable electromagnetic transmission based on metallic nanoslit with a microcavity

Xin-Jun Wang, Meng-Dong He, Wang-Guo Ma, Jian-Qiang Liu

Optical and Quantum Electronics > 2014 > 46 > 11 > 1425-1433

In this paper, we explore the electromagnetic transmission through a vertical metallic nanoslit with a horizontal microcavity. The introduction of microcavity gives rise to the changes of slit transmission spectrum in the number and amplitude of transmission peak and dip, owing to the electromagnetic coupling between slit and microcavity. The transmission through the slit with microcavity strongly...

article

Ballistic thermal transport in multi-terminal graphene junctions

Xiao-Fang Peng, Chun Xiong, Xin-Jun Wang, Li-Qun Chen, more

Computational Materials Science > 2013 > 77 > Complete > 440-444

Ballistic thermal transport properties in Y-branch three-terminal and H-branch four-terminal graphene junctions are systematically investigated by using nonequilibrium Green’s function method. A comparative analysis for the Y-branch and H-branch quantum structure models is made. The results show that the increased junction in H-branch four-terminal graphene junctions can obviously reduce the thermal...

article

Enhanced low-temperature thermal conductance by quantum dot made of material with high sound velocity in a three-dimensional semiconductor nanowire

Xin-Jun Wang, Xiao-Fang Peng

Physica B: Physics of Condensed Matter > 2013 > 411 > Complete > 48-51

We investigate ballistic phonon transport and thermal conductance in a three-dimensional semiconductor nanowire modulated with different materials in a single quantum dot using elastic wave continuum model. In general, the acoustic discontinuities at such system cause the decrease of the thermal conductance. However, at very low temperatures, the material with higher sound velocity in quantum dot...

article

Efficient directional excitation of surface plasmon polaritons by partial dielectric filling slit structure

Meng-Dong He, Jian-Qiang Liu, Kai-Jun Wang, Xin-Jun Wang, more

Optics Communications > 2012 > 285 > 21-22 > 4588-4592

In this paper, we investigate the excitation of surface plasmon polariton (SPP) in the metallic slit partly filled with dielectric by using the finite-difference time-domain method. It is found that the slit structure displays high asymmetry in the field distribution and SPP excitation due to the difference in matching degree of SPP wavevector on the two sides of slit exit. At certain incident wavelengths,...

article

Dechlorination of p,p′-DDTs coupled with sulfate reduction by novel sulfate-reducing bacterium Clostridium sp. BXM

Peng Bao, Zheng-Yi Hu, Xin-Jun Wang, Jian Chen, more

Environmental Pollution > 2012 > 162 > Complete > 303-310

A novel non-dsrAB (without dissimilatory sulfite reductase genes) sulfate-reducing bacterium (SRB) Clostridium sp. BXM was isolated from a paddy soil. Incubation experiments were then performed to investigate the formation of reduced sulfur compounds (RSC) by Clostridium sp. BXM, and RSC-induced dechlorination of p,p′-DDT in culture medium and soil solution. The RSCs produced were 5.8mM and 4.5mM...

article

High expression of TGF-β1 in the vaginal incisional margin predicts poor prognosis in patients with stage Ib-IIa cervical squamous cell carcinoma

Dong-Mei Fan, Xin-Jun Wang, Tao He, Yan Wang, more

Molecular Biology Reports > 2012 > 39 > 4 > 3925-3931

This study evaluated the relationship between altered cytoplasmic expression of TGF-β1 in tissues of the vaginal incisional margin and vaginal cancer recurrence in patients with stage Ib-IIa cervical squamous cell carcinoma (CSCC). This paper also discusses the prognostic value of TGF-β1 expression at these locations. We found that TGF-β1 expression in the vaginal margin had a close association with...

article

Using stable lead isotopes to trace heavy metal contamination sources in sediments of Xiangjiang and Lishui Rivers in China

Guo-Xin Sun, Xin-Jun Wang, Qin-Hong Hu

Environmental Pollution > 2011 > 159 > 12 > 3406-3410

Lead isotopes and heavy metal concentrations were measured in two sediment cores sampled in estuaries of Xiangjiang and Lishui Rivers in Hunan province, China. The presence of anthropogenic contribution was observed in both sediments, especially in Xiangjiang sediment. In the Xiangjiang sediment, the lower ²⁰⁶ Pb/ ²⁰⁷ Pb and higher ²⁰⁸ Pb/ ²⁰⁶ Pb ratio, than natural...

chapter

Activating eco-city in China: The system engineering for cities' green transition

Xin Jun Wang, Po-Han Hsu, Rui Zhou, Hai-long Su

2011 5th International Association for China Planning Conference > 1 - 7

2011 5th International Association for China Planning Conference (IACP 2011)

The development of eco-city in China turns to a phenomenon recently, and some sample projects have been scheduled in the nationwide. Nevertheless, the planning of eco-city focuses on static construction with green technologies; in this study, the planning and operation of eco-city will be regarded as a complex system engineering that requires collaboration of systems from various categories and considerations...

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INFONA - science communication portal

Search results for: Xin-Jun Wang

Spin filter type transformation in Sn-phthalocyanine

Half-metallicity and high spin-filtering effect of magnetic atoms embedded zigzag 6, 6, 12-graphyne nanoribbon

Thermal conductance in graphene nanoribbons modulated by defects and alternating boron-nitride structures

Optical properties of a metallic nanoparticle array covered by a reduced cytochrome c molecule layer

Tunable ballistic thermal conductance of electrons in strained graphene nanoribbons

Plasmon Resonances in a Periodic Square Coaxial Hole Array in a Graphene Sheet

Plasmon Resonances in a Stacked Pair of Periodic Graphene Hole Arrays

A tunable bistable device based on a coupled quantum dot–metallic nanoparticle nanosystem

Evaluation of TAZ expression and its effect on tumor invasion and metastasis in human glioma

Thermal conductance associated with six types of vibration modes in quantum wire modulated with quantum dot

Diesel Engine PT Pump Fault Diagnosis based on the Characteristics of its Fuel Pressure

Two proton-conductive hybrids based on 2-(3-pyridyl)benzimidazole molecules and Keggin-type heteropolyacids

Controllable electromagnetic transmission based on metallic nanoslit with a microcavity

Ballistic thermal transport in multi-terminal graphene junctions

Enhanced low-temperature thermal conductance by quantum dot made of material with high sound velocity in a three-dimensional semiconductor nanowire

Efficient directional excitation of surface plasmon polaritons by partial dielectric filling slit structure

Dechlorination of p,p′-DDTs coupled with sulfate reduction by novel sulfate-reducing bacterium Clostridium sp. BXM

High expression of TGF-β1 in the vaginal incisional margin predicts poor prognosis in patients with stage Ib-IIa cervical squamous cell carcinoma

Using stable lead isotopes to trace heavy metal contamination sources in sediments of Xiangjiang and Lishui Rivers in China

Activating eco-city in China: The system engineering for cities' green transition

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