Abstract:Two novel donor-acceptor (D-A) polymer acceptors based naphthalene diimide (NDI) and 2.2'-bithiophene, named P(NDI2THD-T2) and P(NDI2TOD-T2), were designed and synthesized as non-fullerene acceptors in polymer solar cells (PSCs). The thermal, optophysical, and electronic properties of these materials were systematically investigated. With the thiophene inserted to side chains, two polymers both show wide absorption varying from 350 to 900 nm in the visible and NIR spectrum and no red-shift from solution to film. Their LUMO/HOMO energy levels were -3.94/-5.41 and -3.93/-5.38 eV, respectively. In addition, this two polymers are amorphous since they have no peaks in DSC and possess high thermal stability. Photovoltaic performance with the configuration of ITO/PEDOT:PSS/PTB7-Th:acceptors/PDIN/Al exhibit a power conversion efficiency of 2.43% and 3.19%, as well as 2.73% and 4.75% after adding 3%DPE, respectively. By introducing the thiophen to side chains of polymers, we can make polymers of NDI contain their wide absorption and narrow bandgap at the same time change the aggregation of polymers, which can provide a promising way of donor design.

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	1. Side Chain Engineering of Naphthalenediimide-Bithiophene-Based Polymer Acceptors in All-Polymer Solar Cells
	Wu Xia,Chen Zhikuan
	Materials Science 21 May 2017
	Show/Hide Abstract \| Cite this paper︱Full-text: PDF (944K B)

	Abstract:Two novel donor-acceptor (D-A) polymer acceptors based naphthalene diimide (NDI) and 2.2'-bithiophene, named P(NDI2THD-T2) and P(NDI2TOD-T2), were designed and synthesized as non-fullerene acceptors in polymer solar cells (PSCs). The thermal, optophysical, and electronic properties of these materials were systematically investigated. With the thiophene inserted to side chains, two polymers both show wide absorption varying from 350 to 900 nm in the visible and NIR spectrum and no red-shift from solution to film. Their LUMO/HOMO energy levels were -3.94/-5.41 and -3.93/-5.38 eV, respectively. In addition, this two polymers are amorphous since they have no peaks in DSC and possess high thermal stability. Photovoltaic performance with the configuration of ITO/PEDOT:PSS/PTB7-Th:acceptors/PDIN/Al exhibit a power conversion efficiency of 2.43% and 3.19%, as well as 2.73% and 4.75% after adding 3%DPE, respectively. By introducing the thiophen to side chains of polymers, we can make polymers of NDI contain their wide absorption and narrow bandgap at the same time change the aggregation of polymers, which can provide a promising way of donor design.
	TO cite this article:Wu Xia,Chen Zhikuan. Side Chain Engineering of Naphthalenediimide-Bithiophene-Based Polymer Acceptors in All-Polymer Solar Cells[OL].[21 May 2017] http://www.paper.edu.cn/en_releasepaper/content/4734325


	2. Impact of Fluorine Atoms on Perylene Diimide Derivative for Fullerene-free Organic Photovoltaics
	Zhao Liang,Chen Zhikuan
	Materials Science 21 May 2017
	Show/Hide Abstract \| Cite this paper︱Full-text: PDF (536K B)

	Abstract:The incorporation of fluorine atoms in organic semiconducting materials has attracted much attentions recently due to its unique function to manipulate the molecular packing, film morphology and molecular energy levels. In this work, two perylenediimide(PDI) derivatives FPDI-CDTph and FPDI-CDTph2F were designed and synthesized to investigate the impact of fluorination on non-fullerene acceptors. Both FPDI-CDTph and FPDI-CDTph2F exhibited strong and broad absorption profiles, suitable lowest unoccupied molecular orbital (LUMO) and highest occupied molecular orbital (HOMO) energy levels, and good electron transport ability. Compared with FPDI-CDTph, the fluorinated acceptor (FPDI-CDTph2F) afforded an optimal bulk heterojunction morphology with an interconnected and nanoscale phase separated structure that allowed more efficient exciton dissociation and balanced charge transport. Consequently, organic solar cells based on FPDI-CDTph2F showed a much higher power conversion efficiency (PCE) of 6.03% than that of FPDI-CDTph based devices (4.10%) without any post-fabrication treatment.
	TO cite this article:Zhao Liang,Chen Zhikuan. Impact of Fluorine Atoms on Perylene Diimide Derivative for Fullerene-free Organic Photovoltaics[OL].[21 May 2017] http://www.paper.edu.cn/en_releasepaper/content/4734328

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	3. Lattice structure and mechanical behavior of DyGdYHoTbhigh-entropy alloy
	Liu Dajin,Zhang Mengdi,Zhou Zheng,Yu Pengfei,Li Gong
	Materials Science 16 May 2017
	Show/Hide Abstract \| Cite this paper︱Full-text: PDF (346K B)

	Abstract:A new kind of equiatomicDyGdYHoTb solid solution high entropy alloy (HEA) was synthesized by arc-melting. The hexagonal close packed (HCP) lattice structure of this HEA was revealed by X-ray diffraction (XRD) pattern. A series of disks, 2.0 mm in thickness and 10.0 mm in diameter, were applied to semi-constraint high pressure torsion (HPT) under a pressure of 5.0GPa with 0.0, 0.5, 2.5 and 5.0 turns, respectively. Vickers hardness (HV) of the twisteddisks, showing great relevance to the number of turns, complies well with the strain-hardening theory. Compression behavior of three samples, one as-cast, one just pressed under 5.0 GPa and one annealed at 1273K under 5.0GPa were researched.After different heat treatments, strengths of all these samples werequite limited and not very different from each other.
	TO cite this article:Liu Dajin,Zhang Mengdi,Zhou Zheng, et al. Lattice structure and mechanical behavior of DyGdYHoTbhigh-entropy alloy[OL].[16 May 2017] http://www.paper.edu.cn/en_releasepaper/content/4734058


	4. Nucleation rate of the Metallic Glass Melt
	Fan Jiantao,Cui Peng,Liu Dajin,Zhang Lijun,Zhang Mengdi,Zhou Zheng,Li Gong,Liu Riping
	Materials Science 16 May 2017
	Show/Hide Abstract \| Cite this paper︱Full-text: PDF (463K B)

	Abstract:The solidification and nucleation of Zr41Ti14Cu12.5Ni10Be22.5 undercooled melts triggered by Zr, Ti, Cu, and Ni clusters introduced by sputtering these pure metal targets is studied. Ananomalous solidification triggered by Zr-atomic clusters above the Zr41Ti14Cu12.5Ni10Be22.5 melting temperature of 140 K is observed. The nucleation in the undercooled Zr41Ti14Cu12.5Ni10Be22.5 is investigated by Monte Carlo simulations and analyzed by the classical nucleation theory. This Letter reveals an effective research method on investigating the instability of a MG liquid near the thermodynamic critical temperature.
	TO cite this article:Fan Jiantao,Cui Peng,Liu Dajin, et al. Nucleation rate of the Metallic Glass Melt[OL].[16 May 2017] http://www.paper.edu.cn/en_releasepaper/content/4732616


	5. First principles study on the electronic structure and the polarization characteristics of dielectric function of orthorhombic Ca2Ge
	Cen Weifu,Yang Yinye,Lv Lin
	Materials Science 11 May 2017
	Show/Hide Abstract \| Cite this paper︱Full-text: PDF (728K B)

	Abstract:The electronic structure，dielectric function and the polarization characteristics of orthorhombic Ca2Ge have been studied by density functional theory of the first-principles pseudo-potential method wave method. The results show that orthorhombic Ca2Ge was a direct band gap semiconductor with the band gap of 0.483eV. The valence bands of orthorhombic Ca2Ge were mainly composed of Ca 3d and Ge 4p, existed in s-p-d orbital hybridization and p-d orbital hy-bridization. The conduction bands of orthorhombic Ca2Ge were mainly composed of Ca 3d, inex-istence in orbital hybridization. The dielectric function of orthorhombic Ca2Ge existed in aeo-lotropism. In the direction of (100) and (001) the dielectric function were decreased and the elec-tron transition were increased by polarized. In the direction of (010) the dielectric function was increased by polarized. The calculation results show that polarization was promoted the electron transition, was an effective means for regulating the electron transition, was provided a theoretical reference to the study of Ca2Ge.
	TO cite this article:Cen Weifu,Yang Yinye,Lv Lin. First principles study on the electronic structure and the polarization characteristics of dielectric function of orthorhombic Ca2Ge[OL].[11 May 2017] http://www.paper.edu.cn/en_releasepaper/content/4729588


	6. Toughening of Inconel 625 alloy reinforced by WCp fabricated by electron beam melting
	LIU Chang,PENG Hui,GUO Hongbo
	Materials Science 04 May 2017
	Show/Hide Abstract \| Cite this paper︱Full-text: PDF (1974K B)

	Abstract:With the elevated addition of carbide reinforcements, the ductility of Ni-Based metal matrix composited dropped drastically. Samples fabricated by electron beam melt system, using blend of Inconel 625 and WC powders as raw materials are investigated. In order to find a method to maximize the toughness of such MMCs, several parameters are independently changed during the fabrication. As results, MMCs' ductilities are sensible to parameters such as the scan speed of electron beam. The variance of impact toughness can be up to 50% for MMCs with 30 wt% WC concentration. The sensitivity to parameters drops when the addtion of WC reinforcement increases. The scan speed largely determines the heat input and thus influences the form and the size of melt pool. It has subsequently impacts on the morphology and the types of secondary carbides, degree of dissolution of WC particles, and grain size and growth direction. All factors mentioned above interact, and determine the toughness of sample. The effect of Line offset is also inverstigated. With experimental results, a constructive advice based on an experimental optimized energy density for parameter setting of practical components with large scale was proposed.
	TO cite this article:LIU Chang,PENG Hui,GUO Hongbo. Toughening of Inconel 625 alloy reinforced by WCp fabricated by electron beam melting[OL].[ 4 May 2017] http://www.paper.edu.cn/en_releasepaper/content/4729869


	7. Three way catalysis performances of modified halloysite hybrid Pd-Rh loaded CeO2-ZrO2 microparticals
	OUYANG Jing,ZHAO Zai,YANG Huaming
	Materials Science 02 May 2017
	Show/Hide Abstract \| Cite this paper︱Full-text: PDF (963K B)

	Abstract:Halloysite hybrid cerium-zirconium solid solution (CZ-Hal) for three way catalyst was synthesized through co-precipitation method. The modified Hal hybrid CZ solid solutions was consisted of agglomerated nanoparticles with sizes in the range 100―200 nm, but the Hal mineral in the composite remained their tubular morphology. The CZ-Hal composite has larger BET surface area (130 m2/g compared to 71 m2/g) and more concentrated pore size distribution as well as the lowered reduction temperature, compared with the CZ solid solutions. The supported Pd-Rh/CZH showed optimized catalytic performances for CO and NOx (conversion up to 98%), and CnHm (70%) at light-off temperatures.
	TO cite this article:OUYANG Jing,ZHAO Zai,YANG Huaming. Three way catalysis performances of modified halloysite hybrid Pd-Rh loaded CeO2-ZrO2 microparticals[OL].[ 2 May 2017] http://www.paper.edu.cn/en_releasepaper/content/4729495


	8. The Preparation of Grafed Specific Aptamer Magnetic Nanoparticles and Separation of Lysozyme from Egg White
	Wang Hongsu,Luo Ruiping,Zhou Xinrui
	Materials Science 28 April 2017
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	Abstract:The Fe3O4 nanoparticle is prepared by chemical coprecipitation, then the lysozyme aptamers with aldehyde group are grafted onto the functional Fe3O4 nanoparticle by the specific reaction of aldehyde group and amino group. The Fe3O4 nanoparticle have many good characterisitic, such as great water dispersibility, large surface area. It can separate and purificate lysozyme from the egg white by electrostatic interaction. And the optimal experimental conditions are explored. The maximum adsorption capacity of Fe3O4 nanoparticle in lysozyme aqueous solution is 460mg/g, and 113 mg/g in egg white. After desorption of Fe3O4 nanoparticle the activity of lysozyme in eluent remains 89%. This method is simple, economic and could be expanded produced industry.
	TO cite this article:Wang Hongsu,Luo Ruiping,Zhou Xinrui. The Preparation of Grafed Specific Aptamer Magnetic Nanoparticles and Separation of Lysozyme from Egg White[OL].[28 April 2017] http://www.paper.edu.cn/en_releasepaper/content/4729101


	9. Electrical Control of Reflectance in La0.5Sr0.5CoO3/CeY2Fe5O12 Oxide Heterostructure
	ZHU Yinlong,BI Lei
	Materials Science 26 April 2017
	Show/Hide Abstract \| Cite this paper︱Full-text: PDF (530K B)

	Abstract:Electrically controlling materials' properties contributes to extending functions and applications of electronic devices due to introducing a new degree of freedom that can be manipulated by an electric field. Here, the electrical properties, magneto-optical effect, and electric field control of the reflectance in the La0.5Sr0.5CoO3/CeY2Fe5O12 oxide heterostructure have been experimentally investigated and demonstrated. By applying a voltage of ±5 V across the interface at room temperature, the reflectance of the heterostructure can be reversibly modulated by 0.12%. Simultaneously, the electrical resistance and capacitance of the structure were reversibly modified. Oxygen ion migration near the La0.5Sr0.5CoO3/CeY2Fe5O12 interface under the applied electric field is considered to be the mechanism of electric field controlled reflectance in this structure. This work based on electrochemical gating at oxygen level provides a new mechanism to electrically reconfigure the optical properties of magneto-optical devices for integrated photonic device applications.
	TO cite this article:ZHU Yinlong,BI Lei. Electrical Control of Reflectance in La0.5Sr0.5CoO3/CeY2Fe5O12 Oxide Heterostructure[OL].[26 April 2017] http://www.paper.edu.cn/en_releasepaper/content/4725815


	10. The Preparation of Hierarchically Porous Bioactive Glass and Immobilization of Lysozyme
	Wang Hongsu,Luo Ruiping,Zhou Xinrui
	Materials Science 24 April 2017
	Show/Hide Abstract \| Cite this paper︱Full-text: PDF (528K B)

	Abstract:Hierarchically porous bioactive glass (noted as YMBG) was prepared by pine pollen for lysozyme immobilization via intermolecular interactions. The morphology and pore diameter distribution of YMBG were characterized by scanning electron microscopy (SEM), transmitted electron microscopy (TEM) and nitrogen adsorption- desorption. FTIR , UV, fluorescence, and circular dichroism (CD) studies were showed that lysozyme maintained its original secondary structure in the process of lysozyme immobilization. And the optimal experimental conditions were explored. This material possessed a high lysozyme immobilized amount (648±5.1 mg/g support). In addition, it was found that the adsorption process was suitable for the Langmuir isothermal model. And the activity of immobilized lysozyme still kept about 52% of the original enzyme; the use of immobilized enzyme was distinguished, and the activity remained about 25% after using 4 times repeatedly.
	TO cite this article:Wang Hongsu,Luo Ruiping,Zhou Xinrui. The Preparation of Hierarchically Porous Bioactive Glass and Immobilization of Lysozyme[OL].[24 April 2017] http://www.paper.edu.cn/en_releasepaper/content/4727258

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