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Advances in nanomaterials for radiation protection in the aerospace industry: a systematic review.
Nanotechnology
December 2024
CCTS/DFQM, UFSCar - Campus Sorocaba, Rod. João Leme dos Santos km 110 - SP-264 Bairro do Itinga - Sorocaba CEP 18052-780, Sorocaba, 18052-780, BRAZIL.
Nanomaterials stand out for their exceptional properties and innovative potential, especially in applications that protect against space radiation. They offer an innovative approach to this challenge, demonstrating notable properties of radiation absorption and scattering, as well as flexibility and lightness for the development of protective clothing and equipment. This review details the use of polymeric materials, such as polyimides (PIs), which are efficient at attenuating ultraviolet (UV) radiation and atomic oxygen (AO).
View Article and Find Full Text PDFPropagation of Orientation Across Lengthscales in Sheared Self-Assembling Hierarchical Suspensions via Rheo-PLI-SAXS.
Adv Sci (Weinh)
December 2024
Department of Industrial and Materials Science, Division of Engineering Materials, Chalmers University of Technology, Gothenburg, SE-412 96, Sweden.
Simultaneous rheological, polarized light imaging, and small-angle X-ray scattering experiments (Rheo-PLI-SAXS) are developed, thereby providing unprecedented level of insight into the multiscale orientation of hierarchical systems in simple shear. Notably, it is observed that mesoscale alignment in the flow direction does not develop simultaneously across nano-micro lengthscales in sheared suspensions of rod-like chiral-nematic (meso) phase forming cellulose nanocrystals. Rather, with increasing shear rate, orientation is observed first at mesoscale and then extends to the nanoscale, with influencing factors being the aggregation state of the hierarchy and concentration.
View Article and Find Full Text PDFQuantifying Long-Time Hydrogen-Deuterium Exchange of Bovine Serum Albumin with Hydrogen-Deuterium Exchange Small-Angle Neutron Scattering.
J Phys Chem B
December 2024
Center for Neutron Science, Department of Chemical and Biomolecular Engineering, College of Engineering, University of Delaware, Newark, Delaware 19711, United States.
Hydrogen-deuterium exchange (HDX) measured by small-angle neutron scattering (HDX-SANS) is used to measure HDX in bovine serum albumin (BSA) under different temperatures and formulation conditions. HDX-SANS measurements are performed at 40, 50, and 60 °C in DO after storing proteins at 4 °C for 1 week to pre-exchange the readily accessible hydrogens. This enables us to probe the long-time HDX of protons at the core of the BSA proteins, which is more challenging for solvent molecules to access.
View Article and Find Full Text PDFMultiscale Analyses of Strain-Enhanced Charge Transport in Conjugated Polymers.
ACS Nano
November 2024
Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), Pohang 37673, Republic of Korea.
Article Synopsis
- The study focuses on improving the properties of semiconducting polymers for flexible and wearable electronics, particularly diketopyrrolopyrrole (DPP)-based polymers.
- By adjusting the molecular design of donor moieties, researchers enhanced the mechanical strength and charge transport capabilities of these polymers, with DPP-4T showing remarkable flexibility and strain resilience.
- Key findings include that the strain-induced changes in polymer structure enable better charge transport by reducing energy barriers, which is essential for maintaining reliable electronic performance under mechanical stress.
Depth-dependent study of time-reversal symmetry-breaking in the kagome superconductor AVSb.
Nat Commun
October 2024
Laboratory for Muon Spin Spectroscopy, PSI Center for Neutron and Muon Sciences, Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland.
The breaking of time-reversal symmetry (TRS) in the normal state of kagome superconductors AVSb stands out as a significant feature, but its tunability is unexplored. Using low-energy muon spin rotation and local field numerical analysis, we study TRS breaking as a function of depth in single crystals of RbVSb (with charge order) and Cs(VTa)Sb (without charge order). In the bulk of RbVSb (>33 nm from the surface), we observed an increase in the internal magnetic field width in the charge-ordered state.
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