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Orientation analysis

Improving the Stability and Monodispersity of Layered Cesium Lead Iodide Perovskite Thin Films by Tuning Crystallization Dynamics

Hadi, Atefe; Ryan, Bradley J.; Nelson, Rainie D.; Santra, Kalyan; Lin, Fang-Yi; Cochran, Eric W.; Panthani, Matthew G.

 ApplicationCharacterizationCustomer publicationsGIWAXSInorganic materialMaterialOrientation analysisRenewable energySurface structure and patternsTechnique

Improving the Stability and Monodispersity of Layered Cesium Lead Iodide Perovskite Thin Films by Tuning Crystallization Dynamics

Hadi, Atefe; Ryan, Bradley J.; Nelson, Rainie D.; Santra, Kalyan; Lin, Fang-Yi; Cochran, Eric W.; Panthani, Matthew G.

Assembling halide perovskites into layered structures holds promise for addressing chemical and phase stability challenges; however, several other challenges need to be addressed to create efficient and stable halide perovskite devices. Layered halide perovskites (LHPs) suffer from a broad distribution of layer thicknesses and band gaps within thin films. Reducing polydispersity…
Structure Evolution of Polyethylene in Sequential Biaxial Stretching along the First Tensile Direction

Chen, Qiang; Chen, Dandan; Kang, Jian; Cao, Ya; Chen, Jinyao

 (Natural) polymersApplicationCharacterizationCrystalline fractionCustomer publicationsMaterialOrientation analysisOtherPhase analysisPolymer researchSAXSTechnique

Structure Evolution of Polyethylene in Sequential Biaxial Stretching along the First Tensile Direction

Chen, Qiang; Chen, Dandan; Kang, Jian; Cao, Ya; Chen, Jinyao

Two linear low-density polyethylene samples (PE-A and PE-B), with similar melt index and molecular weight but different molecular structures, were used to explore the structural evolution during sequential biaxial stretching. Only PE-A could be successfully stretched into a film with the biaxial draw ratio of 6 × 6. The interlamellae…
Over 16% efficiency organic photovoltaic cells enabled by a chlorinated acceptor with increased open-circuit voltages

Cui, Yong; Yao, Huifeng; Zhang, Jianqi; Zhang, Tao; Wang, Yuming; Hong, Ling; Xian, Kaihu; Xu, Bowei; Zhang, Shaoqing; Peng, Jing; Wei, Zhixiang; Gao, Feng; Hou, Jianhui

 (Natural) polymersApplicationCharacteristic dimensionCharacterizationCustomer publicationsGIWAXSMaterialOrientation analysisRenewable energySurface structure and patternsTechnique

Over 16% efficiency organic photovoltaic cells enabled by a chlorinated acceptor with increased open-circuit voltages

Cui, Yong; Yao, Huifeng; Zhang, Jianqi; Zhang, Tao; Wang, Yuming; Hong, Ling; Xian, Kaihu; Xu, Bowei; Zhang, Shaoqing; Peng, Jing; Wei, Zhixiang; Gao, Feng; Hou, Jianhui

Broadening the optical absorption of organic photovoltaic (OPV) materials by enhancing the intramolecular push-pull effect is a general and effective method to improve the power conversion efficiencies of OPV cells. However, in terms of the electron acceptors, the most common molecular design strategy of halogenation usually results in down-shifted molecular…
TBAH/Urea/H2O solvent for room temperature wet-spinning of cellulose and optimization of drawing process

Zhang, Jingyu; Wang, Mengdie; Li, Wei; Wei, Wei; Li, Jinyang; Jiang, Man; Wang, Yong; Zhou, Zuowan

 (Natural) polymersApplicationCharacterizationCustomer publicationsFibersMaterialOrientation analysisPolymer researchSAXSTechnique

TBAH/Urea/H2O solvent for room temperature wet-spinning of cellulose and optimization of drawing process

Zhang, Jingyu; Wang, Mengdie; Li, Wei; Wei, Wei; Li, Jinyang; Jiang, Man; Wang, Yong; Zhou, Zuowan

TBAH(tetra-butylammonium hydroxide)/Urea/H2O solvent has been applied for the solvent wet-spinning of cellulose, due to its room temperature operation, good stability and spinnability of the cellulose solution, as well as the unconditional string of low DP (degree of polymerization) for dissolving cellulose. Most importantly, it is found that the stability of…
Construction of Dual Orientation Crystalline Structure in Poly(vinyl alcohol)/Graphene Oxide Nano-Composite Hydrogels and Reinforcing Mechanism

Meng, Yeqiao; Zhao, Xiaowen; Ye, Lin

 (Hydro)gels(Natural) polymersApplicationCharacterizationCompositesCrystalline fractionCustomer publicationsMaterialOrientation analysisPhase analysisPolymer researchSAXSTechnique

Construction of Dual Orientation Crystalline Structure in Poly(vinyl alcohol)/Graphene Oxide Nano-Composite Hydrogels and Reinforcing Mechanism

Meng, Yeqiao; Zhao, Xiaowen; Ye, Lin

Oriented poly(vinyl alcohol) (PVA)/graphene oxide (GO) nanocomposite hydrogels with different draw ratios were prepared by stretching during a freezing/thawing process. The PVA/GO samples with a draw ratio of 200% had significantly enhanced mechanical properties by formation of a microfibrillar structure, while the tensile strength and compressive modulus respectively reached as…
Effect of Irradiation and Detection of Long-Lived Polyenyl Radicals in Highly Crystalline Ultra-High Molar Mass Polyethylene (UHMMPE) Fibers

Forster, Amanda L.; Tsinas, Zois; Al-Sheikhly, Mohamad

 (Natural) polymersApplicationCharacterizationCustomer publicationsMaterialOrientation analysisPhase analysisPolymer researchTechniqueWAXS

Effect of Irradiation and Detection of Long-Lived Polyenyl Radicals in Highly Crystalline Ultra-High Molar Mass Polyethylene (UHMMPE) Fibers

Forster, Amanda L.; Tsinas, Zois; Al-Sheikhly, Mohamad

To improve properties such as thermal conductivity, low temperature thermal strain, and creep resistance of ultra-high molar mass polyethylene (UHMMPE) fibers, several researchers have previously undertaken efforts to crosslink these fibers using radiation. Ionizing radiation is commonly used to crosslink bulk UHMMPE in other applications, such as artificial joints. However,…
Characterization of poly(butylene succinate)/poly(lactic acid) blends with in-situ sub-micron fibers and intercalation structure manufacturing by volumetric pulsating elongation flow

Tan, Ling-cao; Qu, Jin-ping

 (Natural) polymersApplicationCharacterizationCustomer publicationsMaterialOrientation analysisPolymer researchSAXSTechnique

Characterization of poly(butylene succinate)/poly(lactic acid) blends with in-situ sub-micron fibers and intercalation structure manufacturing by volumetric pulsating elongation flow

Tan, Ling-cao; Qu, Jin-ping

In-situ fibrillation and intercalation structure are favoring to improve the properties of polymer blends. In this work poly(butylene succinate)/poly(lactic acid) blends containing such structures have been achieved via volume pulsating elongation flow instead of strong shear. The mechanical properties, crystallization properties and micromorphology of the extruders were well investigated. The…
Adding Symmetry: Cylindrically Confined Crystallization of Nylon-6

Yu, Shichen; Lai, Ziwei; Jinnai, Hiroshi; Zeng, Xingming; Ageishi, Masaki; Lotz, Bernard; Cheng, Stephen Z. D.; Zheng, Nan; Zhang, Shuailin; Feng, Xueyan; Cao, Yan

 (Natural) polymersApplicationCharacterizationCustomer publicationsMaterialOrientation analysisPolymer researchSAXSTechnique

Adding Symmetry: Cylindrically Confined Crystallization of Nylon-6

Yu, Shichen; Lai, Ziwei; Jinnai, Hiroshi; Zeng, Xingming; Ageishi, Masaki; Lotz, Bernard; Cheng, Stephen Z. D.; Zheng, Nan; Zhang, Shuailin; Feng, Xueyan; Cao, Yan

It has been known that twin symmetry occurs in small metal crystals and it could lead to ultrahigh mechanical properties. In this research, we first found out the formation of nanoscale twin crystals in polymers under cylindrical confinement. The nylon-6 nanorods are fabricated by infiltrating the melt into cylindrical nanopores…
A printed, recyclable, ultra-strong, and ultra-tough graphite structural material

Zhou, Yubing; Chen, Chaoji; Zhu, Shuze; Sui, Chao; Wang, Chao; Kuang, Yudi; Ray, Upamanyu; Liu, Dapeng; Brozena, Alexandra; Leiste, Ulrich H.; Quispe, Nelson; Guo, Hua; Vellore, Azhar; Bruck, Hugh A.; Martini, Ashlie; Foster, Bob; Lou, Jun; Li, Teng; Hu, Liangbing

 (Natural) polymersApplicationCharacterizationCompositesCustomer publicationsGISAXSMaterialOrientation analysisPolymer researchTechnique

A printed, recyclable, ultra-strong, and ultra-tough graphite structural material

Zhou, Yubing; Chen, Chaoji; Zhu, Shuze; Sui, Chao; Wang, Chao; Kuang, Yudi; Ray, Upamanyu; Liu, Dapeng; Brozena, Alexandra; Leiste, Ulrich H.; Quispe, Nelson; Guo, Hua; Vellore, Azhar; Bruck, Hugh A.; Martini, Ashlie; Foster, Bob; Lou, Jun; Li, Teng; Hu, Liangbing

The high mechanical performance of common structural materials (e.g., metals, alloys, and ceramics) originates from strong primary bonds (i.e., metallic, covalent, ionic) between constituent atoms. However, the large formation energy of primary bonds requires high temperatures in order to process these materials, resulting in significant manufacturing costs and a substantial…
Insight into shear-induced modification for improving processability of polymers: Effect of shear rate on the evolution of entanglement state

Fu, Jiaxin; Wang, Yingxiong; Shen, Kaizhi; Fu, Qiang; Zhang, Jie

 (Natural) polymersApplicationCharacteristic dimensionCharacterizationCustomer publicationsMaterialOrientation analysisPolymer researchSAXSTechnique

Insight into shear-induced modification for improving processability of polymers: Effect of shear rate on the evolution of entanglement state

Fu, Jiaxin; Wang, Yingxiong; Shen, Kaizhi; Fu, Qiang; Zhang, Jie

Many experimental results have revealed that the re-entanglement kinetics of disentangled polymers is much slower than that predicted by tube theory. This retarded recovery of fully entangled state is of practical significance that shear-induced modification may offer a way to improve processability for a polymer by reducing viscosity. This work…
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