Characteristic dimension

ApplicationCharacteristic dimensionCharacterizationCustomer publicationsInorganic materialsMaterialMetalsSAXSTechnique

Ambient synthesis of nanomaterials by in situ heterogeneous metal/ligand reactions

S. Chang, Boyce; Thomas, Brijith; Chen, Jiahao; D. Tevis, Ian; Karanja, Paul; Çınar, Simge; Venkatesh, Amrit; J. Rossini, Aaron; M. Thuo, Martin

Coordination polymers are ideal synthons in creating high aspect ratio nanostructures, however, conventional synthetic methods are often restricted to batch-wise and costly processes. Herein, we demonstrate a non-traditional, frugal approach to synthesize 1D coordination polymers by in situ etching of zerovalent metal particle precursors. This procedure is denoted as the…
12 March 2021
(Natural) polymersApplicationCharacteristic dimensionCharacterizationCustomer publicationsMaterialPolymer researchSAXSSelf-assembled materialTechnique

CO2-Triggered and temperature-switchable crystallization-driven self-assembly of a semicrystalline block copolymer in aqueous medium

Zhu, Rui; Luo, Xinjie; Feng, Yujun; Billon, Laurent

The synthesis of a semicrystalline block copolymer comprising a hydrophilic poly(acrylic acid) (PAA) pure block and an amphiphilic poly(acrylic acid)-r-poly(octadecyl acrylate) (PAA-r-PODA) random block by nitroxide-mediated polymerization (NMP) is reported. The aggregation behavior of the copolymer in aqueous medium was studied by using a MicroCal VP differential scanning calorimeter (VP-DSC)…
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 dimensionCharacterizationCrystalline fractionCustomer publicationsGISAXSGIWAXSMaterialRenewable energySurface structure and patternsTechniqueThin films

Revisiting the Role of Graphene Quantum Dots in Ternary Organic Solar Cells: Insights into the Nanostructure Reconstruction and Effective Förster Resonance Energy Transfer

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

Recent studies have introduced the graphene quantum dot (GQD) as a third material for the bulk-heterojunction polymer:fullerene solar cell (PSC) to improve light conversion efficiency. Although exciton generation/dissociation and carrier transport in the GQD-incorporated light-absorbing layer are strongly influenced by the ternary component, detailed analysis on the role of GQD…
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
ApplicationCharacteristic dimensionCharacterizationCustomer publicationsMaterialNanoparticles & colloidsOtherParticle interactionsPorous materialSAXSShapeSizeSurfactantsTechnique

A solvent-free porous liquid comprising hollow nanorod–polymer surfactant conjugates

Kumar, Raj; Dhasaiyan, Prabhu; Naveenkumar, Parinamipura M.; Sharma, Kamendra P.

Liquids having permanent porosity can offer significant processing advantages over their solid counterparts. This has recently led to tremendous activity towards the design and development of intrinsic pores in the liquid phase, predominantly for studies involving gas sequestration. We show here the development of a solvent-free mesoporous liquid material based…
12 March 2021
ApplicationCharacteristic dimensionCharacterizationCustomer publicationsInorganic materialInorganic materialsMaterialTechniqueTemperatureWAXS

Solidification and melting phase change behavior of eutectic gallium-indium-tin

Koh, Amanda; Hwang, Wonseok; Y. Zavalij, Peter; Chun, Seth; Slipher, Geoffrey; Mrozek, Randy

The room-temperature liquid metal alloy of gallium, indium, and tin (galinstan) has been studied as a deformable conductive element for stretchable electronics and soft robotics. While these applications are predicated on the soft and conformable behavior of galinstan, little work has been done to understand the solidification of the liquid…
12 March 2021
(Natural) polymersApplicationCharacteristic dimensionCharacterizationCustomer publicationsMaterialPolymer researchSAXSTechnique

Multilayered assembly of poly(vinylidene fluoride) and poly(methyl methacrylate) for achieving multi-shape memory effects

Ji, Xiaoying; Chen, Dayong; Zheng, Yu; Shen, Jiabin; Guo, Shaoyun; Harkin-Jones, Eileen

The alternately-organized poly(vinylidene fluoride) (PVDF)/poly(methyl methacrylate) (PMMA) multilayer materials were prepared through layer-multiplying coextrusion. With the multiplication of layers, the thickness of each layer was reduced in proportion and the layer interfaces were enriched generating a broader and more continuous thermal transition temperature (Ttrans) from PVDF to PMMA layers…
12 March 2021
(Natural) polymersApplicationCharacteristic dimensionCharacterizationCustomer publicationsMaterialRenewable energySAXSTechnique

Effect of Phosphaphenanthrene Skeleton in Sulfonated Polyimides for Proton Exchange Membrane Application

Mandal, Arun Kumar; Bisoi, Soumendu; Banerjee, Susanta

Sulfonic acid groups containing aromatic polyimides are of great interest as polymer electrolyte membranes owing to their high thermal and mechanical stability, strong resistance to fuel crossover, excellent film-forming ability, and high proton conductivity. However, these polymers generally experience reduced oxidative permanence. To alleviate the problems associated with the oxidative…
12 March 2021