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Many interesting properties of 2D materials and their assembled structures are strongly dependent on the lateral size and size distribution of 2D materials. Accordingly, effective size separation of polydisperse 2D sheets is critical for desirable applications. Here, we introduce flow field-flow fractionation (FlFFF) for a wide-range size fractionation of graphene oxide (GO) up to 100 μm. Two different separation mechanisms are identified for FlFFF, including normal mode and steric/hyperlayer mode, to size fractionate wide size-distributed GOs while employing a crossflow field for either diffusion or size-controlled migration of GO. Obviously, the 2D GO sheet reveals size separation behavior distinctive from typical spherical particles arising from its innate planar geometry. We also investigate 2D sheet size-dependent mechanical and electrical properties of three different graphene fibers produced from size-fractionated GOs. This FlFFF-based size selection methodology can be used as a generic approach for effective wide-range size separation for 2D materials, including rGO, TMDs, and MXene.
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http://dx.doi.org/10.1021/acsnano.2c01402 | DOI Listing |
Behav Res Methods
September 2025
Department of Psychology, National Taiwan University, Taipei City, Taiwan.
g is a design-comparable effect size that has been recommended by the What Works Clearinghouse since 2020 to assess an intervention effect in single-case studies and for meta-analyses. Yet, no research has systematically studied how g's performance could be impacted by its non-convergence, and how g's non-convergence and performance could be improved by increasing the case size (m) and measurement size (N). This study expanded on the work of Pustejovsky et al.
View Article and Find Full Text PDFTop Curr Chem (Cham)
September 2025
Center for Advanced Materials Research, Research Institute of Sciences and Engineering, University of Sharjah, 27272, Sharjah, United Arab Emirates.
Controlling the size of gold nanoparticles (AuNPs) has been critical in diagnostics, biomolecular sensing, targeted therapy, wastewater treatment, catalysis, and sensing applications. Ultrasmall AuNPs (uAuNPs), with sizes Ranging from 2 to 5 nm, and gold nanoclusters (AuNCs), with sizes less than 2 nm, are often dealt with interchangeably in the literature, making it challenging to review them separately. Although they are grouped in our discussion, their chemical and physical properties differ significantly, partly due to their electronic properties.
View Article and Find Full Text PDFmSphere
September 2025
Department of Biology, Johns Hopkins University, Baltimore, Maryland, USA.
Oxidative stress induces a wide range of cellular damage, often causing disease and cell death. While many organisms are susceptible to the effects of oxidative stress, haloarchaea have adapted to be highly resistant. Several aspects of the haloarchaeal oxidative stress response have been characterized; however, little is known about the impacts of oxidative stress at the translation level.
View Article and Find Full Text PDFACS Nano
September 2025
State Key Laboratory of Materials-Oriented Chemical Engineering, National Engineering Research Center for Special Separation Membrane, Nanjing Tech University, Nanjing 210009, China.
Airborne pathogens and pollution control typically necessitate multiple membranes, each specializing in efficient aerosol filtration, moisture regulation, or antimicrobial protection. Integrating all these functions into a single membrane is highly advantageous but remains inherently challenging due to material incompatibility and inevitable performance trade-offs. Here, we present a photoactive Janus nanofibrous membrane for highly efficient air purification, engineered via sequential electrospinning.
View Article and Find Full Text PDFCureus
August 2025
Department of Neurological Surgery, ProMedica Toledo Hospital, Toledo, USA.
Spontaneous intracranial hypotension (SIH) is caused by cerebrospinal fluid leak and has an incidence of approximately five per 100,000 person-years. SIH leads to a range of clinical symptoms, from debilitating postural headaches to subdural hematomas (SDHs). The pathophysiology of the disease is not fully understood, but has garnered interest in recent years.
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