Category

Orientation analysis

(Natural) polymersApplicationCharacteristic dimensionCharacterizationCompositesCustomer publicationsMaterialOrientation analysisPolymer researchSAXSTechnique

Nanofiller Dispersion, Morphology, Mechanical Behavior, and Electrical Properties of Nanostructured Styrene-Butadiene-Based Triblock Copolymer/CNT Composites

Staudinger, Ulrike; Satapathy, Bhabani K.; Jehnichen, Dieter

A nanostructured linear triblock copolymer based on styrene and butadiene with lamellar morphology is filled with multiwalled carbon nanotubes (MWCNTs) of up to 1 wt% by melt compounding. This study deals with the dispersability of the MWCNTs within the nanostructured matrix and its consequent impact on block copolymer (BCP) morphology,…
12 March 2021
ApplicationCharacterizationCustomer publicationsInorganic materialsOrientation analysisTechniqueWAXS

Macroscopic interpretation of nano-scale scattering data in clay

Birmpilis, G.; Ahmadi-Naghadeh, R.; Dijkstra, J.

The potential of X-ray scattering measurements for monitoring changes on the nano-scale in fine-grained materials in their natural wet state is demonstrated with a series of feasibility tests on well-controlled kaolin samples – that is, water content, pH and loading history. The results indicate that subtle changes on the nanometric…
12 March 2021
(Natural) polymersApplicationCharacterizationCustomer publicationsGIWAXSMaterialOrientation analysisOtherSurface structure and patternsTechniqueThin films

Highly Ordered Semiconducting Polymer Arrays for Sensitive Photodetectors

Wei, Xiao; Gao, Hanfei; Feng, Jiangang; Pi, Yueyang; Zhang, Bo; Zhai, Yu; Wen, Wen; He, Mingqian; Matthews, James R.; Wang, Hongxiang; Li, Yang; Jiang, Shimei; Jiang, Lei; Wu, Yuchen

Semiconducting conjugated polymers possess attractive optoelectronic properties and low-cost solution processability and are inherently mechanically flexible. However, the device performance is susceptible to the fabrication methods because of the relatively weak intermolecular interaction of the polymers and their inherent conformational and energetic disorder. An efficient fabrication technique…
12 March 2021
(Natural) polymersApplicationCharacteristic dimensionCharacterizationCustomer publicationsGIWAXSMaterialOrientation analysisRenewable energySurface structure and patternsTechniqueThin films

Overcoming the energy loss in asymmetrical non-fullerene acceptor-based polymer solar cells by halogenation of polymer donors

Fan, Qunping; Liu, Tao; Gao, Wei; Xiao, Yiqun; Wu, Jingnan; Su, Wenyan; Guo, Xia; Lu, Xinhui; Yang, Chuluo; Yan, He; Zhang, Maojie; Li, Yongfang

To achieve efficient polymer solar cells (PSCs), it is important to overcome the energy loss (Eloss) from the optical bandgap to the open-circuit voltage (Voc) of the device by properly matching donor/acceptor (D/A) photovoltaic materials. Here, we develop efficient PSCs based on the absorption complementary pairs of halogenated polymer donors…
12 March 2021
ApplicationCharacterizationCustomer publicationsLiquid crystalsMaterialOrientation analysisOtherPhase analysisSAXSTechniqueWAXS

Tunable circularly polarized luminescence from molecular assemblies of chiral AIEgens

Song, Fengyan; Cheng, Yanhua; Liu, Qiuming; Qiu, Zijie; Lam, Jacky W. Y.; Lin, Liangbin; Yang, Fafu; Tang, Ben Zhong

Circularly polarized luminescence (CPL) is important to chiral photonic technologies. In molecular systems, besides their intrinsic chemical structures, architectures of molecular assemblies at the mesoscopic scale also account for the final macroscopic CPL properties. Herein, tunable CPL responses can be induced through architectural regulation of these molecular assemblies in suspension…
12 March 2021
ApplicationCharacteristic dimensionCharacterizationCustomer publicationsFractal dimensionGISAXSGIWAXSMaterialOrientation analysisRenewable energyTechniqueThin films

Enhanced gas barrier property of stacking-controlled reduced graphene oxide films for encapsulation of polymer solar cells

Sung, Sae Jin; Park, Jisoo; Cho, Young Shik; Gihm, Se Hoon; Yang, Seung Jae; Park, Chong Rae

Compact stacking of building blocks is essential in order to utilize the impermeable nature of reduced graphene oxide (rGO) for encapsulating barriers in organic electronics. To obtain the desired accumulation characteristic, rGO films were fabricated via spraying process using phase-controlled graphene oxide (GO) dispersion. The rGO laminate prepared from the…
12 March 2021
(Natural) polymersApplicationCharacteristic dimensionCharacterizationCustomer publicationsMaterialNanoparticles & colloidsOrientation analysisParticlesSAXSTechnique

Polymer-Induced Modification of Cellulose Nanocrystal Assemblies in Aqueous Suspensions

Cohen, Neta; Ochbaum, Guy; Levi-Kalisman, Yael; Bitton, Ronit; Yerushalmi-Rozen, Rachel

The effect of adsorbing, nonionic polymers on the phase behavior of cellulose nanocrystals (CNCs) is of interest for design and preparation of functional hybrids. CNC assembly into a chiral nematic phase (N*) was investigated in the presence of highly hydrated poly(vinyl alcohol) (HPVA), low hydrated PVA (LPVA), and poly(vinylpyrrolidone) (PVP).…
12 March 2021
(Natural) polymersApplicationCharacterizationCustomer publicationsGIWAXSMaterialOrientation analysisRenewable energySurface structure and patternsTechniqueThin films

Surface modification of ZnO electron transport layers with glycine for efficient inverted non-fullerene polymer solar cells

Zhu, Xiaoqian; Guo, Bing; Fang, Jin; Zhai, Tianshu; Wang, Yanan; Li, Guangwei; Zhang, Jianqi; Wei, Zhixiang; Duhm, Steffen; Guo, Xia; Zhang, Maojie; Li, Yongfang

Interfacial engineering is crucial to improve the photovoltaic performance of polymer solar cells (PSCs). In this study, we demonstrate efficient inverted non-fullerene PSCs with ZnO modified by nontoxic glycine (Gly) as the electron transport layer (ETL). With the modification of Gly, work function of the ETL interlayer was decreased from…
12 March 2021
(Natural) polymersApplicationCharacterizationCustomer publicationsMaterialOrientation analysisPolymer researchSAXSTechnique

Pore formation and evolution mechanism during biaxial stretching of β-iPP used for lithium-ion batteries separator

Ding, Lei; Xu, Ruizhang; Pu, Lian; Yang, Feng; Wu, Tong; Xiang, Ming

The morphological evolution and pore formation mechanism of different kinds of ?-iPP spherulites during biaxial stretching were analyzed. The smaller radial-growth spherulite deforms heterogeneous, causing a faster reduction in ?-crystal content and higher orientation degree during longitudinal stretching, while the bigger spherulite derived from the hedrites deformed more homogeneous due…
12 March 2021
(Natural) polymersApplicationCharacterizationCustomer publicationsGIWAXSMaterialOrientation analysisRenewable energyTechniqueThin films

Brønsted acid mediated covalent organic framework membranes for efficient molecular separation

Wang, Hongjian; Chen, Long; Yang, Hao; Wang, Meidi; Yang, Leixin; Du, Haiyan; Cao, Chenliang; Ren, Yanxiong; Wu, Yingzhen; Pan, Fusheng; Jiang, Zhongyi

Covalent organic frameworks (COFs) hold great promise in molecular separation. However, since the aperture size of most COFs is in the range of 0.8–4.9 nm, constructing COF membranes with a smaller aperture size is thus in urgent demand yet remains a grand challenge. In this study, a Brønsted acid mediated…
12 March 2021