Category

Technique

ApplicationCatalystsCharacterizationCustomer publicationsMaterialPhase analysisPorous materialRenewable energySAXSTechnique

Influence of Iron Salt Anions on Formation and Oxygen Reduction Activity of Fe/N-Doped Mesoporous Carbon Fuel Cell Catalysts

Fretz, Samuel J.; Janson, Caroline; Rosas-Arbelaez, Walter; Palmqvist, Anders E. C.

Doping carbon materials with transition metal ions can greatly expand their utility, given these metal ions’ unique catalytic activity, for example, in oxygen reduction in proton exchange membrane fuel cells. Unlike main group dopants, a counter anion to the metal cation must be selected and this choice has hitherto received…
12 March 2021
ApplicationCharacterizationCustomer publicationsGIWAXSInorganic materialInorganic materialsMaterialOtherOtherTechnique

Emergence of lead halide perovskite colloidal dispersions through aggregation and fragmentation: insights from the nanoscale to the mesoscale

Pratap, Shambhavi; Keller, Elisabeth; Müller-Buschbaum, Peter

The structural and optoelectronic properties of mixed halide perovskite colloidal precursor dispersions are investigated. With increasing concentration, we observe four stages of growing structures, which affect the thin film morphology: (I) nanoparticles, (II) increasing size of nanoparticles, (III) formation of large aggregates/complex clusters and (IV) fragmentation of large…
12 March 2021
(Natural) polymersApplicationCharacterizationCustomer publicationsMaterialParticle interactionsPolymer researchSAXSShapeSizeTechnique

Revisiting the Dissolution of Cellulose in NaOH as “Seen” by X-rays

Martin-Bertelsen, Birte; Andersson, Erika; Köhnke, Tobias; Hedlund, Artur; Stigsson, Lars; Olsson, Ulf

Cotton production is reaching a global limit, leading to a growing demand for bio-based textile fibers produced by other means. Textile fibers based on regenerated cellulose from wood holds great potential, but in order to produce fibers, the components need to be dissolved in suitable solvents. Furthermore, the dissolution process…
12 March 2021
ApplicationCharacterizationCustomer publicationsMaterialPhase analysisPorous materialRenewable energySAXSTechnique

Novel S-doped ordered mesoporous carbon nanospheres toward advanced lithium metal anodes

Zhang, Fei; Liu, Xiaoyan; Yang, Menghua; Cao, Xiaoqing; Huang, Xingyu; Tian, Yue; Zhang, Fang; Li, Hexing

Lithium metal anode has been considered as an ideal anode for the next generation lithium batteries owing to its high energy density. However, its practical application is still limited by the low Coulombic efficiency and poor safety performance due to the lithium dendrites caused by uncontrollable lithium deposition and unstable…
12 March 2021
ApplicationCharacterizationCompositesCustomer publicationsFractal dimensionMaterialOtherSAXSTechnique

Identifying the Superstability Landscapes of Clay–Carbon Nanosheet Suspensions

Kumar, Sanjay; Harikrishnan, G.

Using a combination of several experiments, we identify the landscapes of the widely reported superstability of suspensions formed by codispersion of nanosheets of clay and carbon. Primarily, two distinct, abrupt transitions within this superstability are observed. This observation made on a series of model laponite–graphene oxide superstable two-dimensional sheet suspensions…
12 March 2021
(Natural) polymersApplicationCharacteristic dimensionCharacterizationCompositesCustomer publicationsMaterialNanoparticles & colloidsParticle interactionsParticle size and size distributionPolymer researchSAXSShapeSizeTechnique

Effects of Hairy Nanoparticles on Polymer Crystallization Kinetics

Jimenez, Andrew M.; Krauskopf, Alejandro A.; Pérez-Camargo, Ricardo A.; Zhao, Dan; Pribyl, Julia; Jestin, Jacques; Benicewicz, Brian C.; Müller, Alejandro J.; Kumar, Sanat K.

We previously showed that nanoparticles (NPs) could be ordered into structures by using the growth rate of polymer crystals as the control variable. In particular, for slow enough spherulitic growth fronts, the NPs grafted with amorphous polymer chains are selectively moved into the interlamellar, interfibrillar, and interspherulitic zones of a…
12 March 2021
(Natural) polymersApplicationCharacterizationCustomer publicationsMaterialOtherRenewable energySAXSTechniqueTemperature

An “interaction-mediating” strategy towards enhanced solubility and redox properties of organics for aqueous flow batteries

Huang, Zhifeng; Kay, Christopher W. M.; Kuttich, Björn; Rauber, Daniel; Kraus, Tobias; Li, Hongjiao; Kim, Sangwon; Chen, Ruiyong

Aqueous redox flow batteries using electroactive organic materials are currently attracting significant attention. However, the influence of supporting electrolytes on the aqueous solubility, electrochemical reversibility and chemical stability of the organic components has rarely been investigated. Here, a new electrolyte design strategy towards enhanced solubility and chemical stability of…
12 March 2021
ApplicationCatalystsCharacterizationCustomer publicationsInorganic materialInorganic materialsMaterialOtherTechniqueWAXS

Synthesis, Modular Composition, and Electrochemical Properties of Lamellar Iron Sulfides

Horwitz, Noah E.; Shevchenko, Elena V.; Park, Jehee; Lee, Eungje; Xie, Jiaze; Filatov, Alexander S.; Anderson, John

Transition metal chalcogenides with layered structures have emerged as promising materials for energy storage, catalysis, and electronics, among other areas. We have identified a new layered phase of iron sulfide containing interlayer solvated cations. We present an optimized synthesis for the Li+-containing material from an Fe(III) xanthate complex. Structure and…
12 March 2021
(Natural) polymersApplicationCharacterizationCustomer publicationsMaterialOtherPhase analysisPolymer researchTechniqueWAXS

Facile treatment to fine-tune cellulose crystals in cellulose-silk biocomposites through hydrogen peroxide

Love, Stacy A.; Popov, Elizabeth; Rybacki, Karleena; Hu, Xiao; Salas-de la Cruz, David

The modulation of structural fibrous protein and polysaccharide biopolymers for the design of biomaterials is still relatively challenging due to the non-trivial nature of the transformation from a biopolymer's native state to a more usable form. To gain insight into the nature of the molecular interaction between silk and cellulose…
12 March 2021
ApplicationCharacterizationCustomer publicationsMaterialPorous materialRenewable energySAXSSizeTechnique

Application of Experimental Design to Hydrogen Storage: Optimisation of Lignin-Derived Carbons

Rowlandson, Jemma L.; Coombs OBrien, James; Edler, Karen J.; Tian, Mi; Ting, Valeska P.

Lignin is a significant by-product of the paper pulping and biofuel industries. Upgrading lignin to a high-value product is essential for the economic viability of biorefineries for bioethanol production and environmentally benign pulping processes. In this work, the feasibility of lignin-derived activated carbons for hydrogen storage was studied using a…
12 March 2021