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Macroscopic Gold Cluster Helical Tendrils.
J Am Chem Soc
January 2025
Henan Key Laboratory of Crystalline Molecular Functional Materials, College of Chemistry, Zhengzhou University, Zhengzhou 450001, P. R. China.
Handedness-controllable macroscopic helices are needed for understanding the chirality transfer through scales and design of high-performance devices. Bottom-up self-assembly rarely affords macroscopic helical superstructures because of accumulating disorder that is difficult to avoid during hierarchical self-assembly. Here, we demonstrate that tetragold clusters can assemble into macroscopic helices at the centimeter scale.
View Article and Find Full Text PDFSub-5 nm Silicon Nanopore Sensors: Scalable Fabrication via Self-Limiting Metal-Assisted Chemical Etching.
ACS Appl Mater Interfaces
January 2025
Division of Micro and Nanosystems, KTH Royal Institute of Technology, Malvinas väg 10, Stockholm 100 44, Sweden.
Solid-state nanopores offer unique possibilities for biomolecule sensing; however, scalable production of sub-5 nm pores with precise diameter control remains a manufacturing challenge. In this work, we developed a scalable method to fabricate sub-5 nm nanopores in silicon (Si) nanomembranes through metal-assisted chemical etching (MACE) using gold nanoparticles. Notably, we present a previously unreported self-limiting effect that enables sub-5 nm nanopore formation from both 10 and 40 nm nanoparticles in the 12 nm thick monocrystalline device layer of a silicon-on-insulator substrate.
View Article and Find Full Text PDFA novel ,,-coordinated organofluoroboron probe for amyloid detection: insight from experiment and theory.
Chem Commun (Camb)
January 2025
Faculty of Chemistry, Wroclaw University of Science and Technology, Wybrzeże Wyspiańskiego 27, 50-370 Wrocław, Poland.
This work presents the results of photophysical studies for a newly synthesized BF-based organoboron dye of D-A-D topology. The one- and two-photon properties of the dye are compared with the D-A parent compound and commercially available amyloid marker: methoxy-X04. We demonstrate that the new dye exhibits better optical properties upon binding to amyloids than methoxy-X04, including emission above 600 nm, higher values of 2PA cross section, broader excitation range and higher increment of emission intensity upon binding to amyloids.
View Article and Find Full Text PDFChallenges and Opportunities of Vision Screening and Refractive Error Management for Underserved Children in the United States.
J Binocul Vis Ocul Motil
January 2025
Wilmer Eye Institute, Johns Hopkins School of Medicine, Baltimore, Maryland.
Uncorrected refractive error is a key cause of childhood visual impairment in the United States. As pediatric vision issues are often asymptomatic, vision screenings are essential to identify children's eye problems. Despite the importance of vision for children's health, well-being, and academic achievement, challenges remain in ensuring that children have equitable access to vision screenings and follow-up eye care.
View Article and Find Full Text PDFThe Correlation Between Gender, Age, Curvature, and Symptom-related Changes in C6 and C7 Slope in 10,000 Subjects.
Spine (Phila Pa 1976)
January 2025
school of Life Sciences, Beijing University of Chinese Medicine, Beijing, P.R. China.
Study Design: A cross-sectional analysis of 10,000 cervical spine X-rays.
Objective: This study investigates the variations in C6S and C7S across demographic factors (gender, age, cervical curvature, symptoms) and explores their correlation. Additionally, machine learning models are applied to improve the accuracy of C7S prediction.
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