AI Article Synopsis
- Dissipative particle dynamics simulations were used to investigate how block copolymers self-assemble on templates with hexagonally and rectangularly arranged posts.
- The study found that the arrangement of the posts significantly affects the resulting polymer morphologies, with hexagonal templates leading to bending alignments.
- By adjusting the spacing between posts in rectangular templates, different mesh-shaped structures can be created, offering insights for designing materials on a nanometer scale through directed self-assembly techniques.
Article Abstract
Dissipative particle dynamics simulations are employed to study the self-assembly of block copolymers on a template modified with ordered posts. Templates with hexagonally arranged and rectangularly arranged posts are both studied. For the systems with hexagonally arranged posts, morphologies with bending alignments are seen most often. We find that the different kinds of patterns, which can be directly observed in experiments, are substantially induced by the pattern of the bottom layer. In the simulations with a template modified with rectangularly arranged posts, by finely adjusting the distances between neighboring posts in both x and y directions, mesh-shaped structures with different angles between the bottom and the sub-bottom layers can be obtained. These results shed light on the better design of lithographically patterned materials on the scale of 10 nm via the directed self-assembly of BCPs by templating.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1039/c5cp05449d | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Unveiling the Mystery of Precision Catalysis: Dual-Atom Catalysts Stealing the Spotlight.
Small
December 2024
College of Electronic and Optical Engineering & College of Flexible Electronics (Future Technology) & State Key Laboratory of Organic Electronics and Information Displays, Nanjing University of Posts and Telecommunications (NJUPT), Nanjing, 210023, P. R. China.
In the era of atomic manufacturing, the precise manipulation of atomic structures to engineer highly active catalytic sites has become a central focus in catalysis research. Dual-atom catalysts (DACs) have garnered significant attention for their superior activity, selectivity, and stability compared to single-atom catalysts (SACs). However, a comprehensive review that integrates geometric and electronic factors influencing DAC performance remains limited.
View Article and Find Full Text PDFLiquid/Liquid Interfacial Assembly of Poly(methyl methacrylate)-Grafted Nanoparticles into Superlattice Monolayers and Their Application as Floating Gates for High Performance Memory.
ACS Appl Mater Interfaces
December 2024
Key Laboratory of Materials Chemistry for Energy Conversion and Storage of Ministry of Education (HUST), State Key Laboratory of Materials Processing and Die & Mold Technology, and Hubei Key Laboratory of Materials Chemistry and Service Failure, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology (HUST), Wuhan 430074, China.
Polymer/gold nanoparticle (AuNP) composites have been utilized as floating gates to enhance the performance of memory devices. However, these devices typically exhibit a low ON/OFF drain current ratio (/) and unstable charge trapping, attributed to the poorly defined arrangement of AuNPs within the composite floating gate. To address these limitations, this study employs poly(methyl methacrylate)-grafted AuNPs (Au@PMMA) as building blocks for the fabrication of monolayered superlattice films with a highly ordered structure via liquid/liquid interfacial assembly.
View Article and Find Full Text PDFContent analysis of marketing features in US nicotine pouch ads from 2021 to 2023.
Tob Control
December 2024
Department of Health, Behavior and Society, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA.
Article Synopsis
- Nicotine pouches have gained popularity since their 2016 US debut, raising concerns about their appeal to youth and non-nicotine users, prompting a study on advertising trends from 2021 to 2023.
- The analysis covered 2,147 ads across various platforms and revealed that 84.6% were on social media, with Zyn being the most prominent brand, and most ads promoting flavored products, particularly fruit and mint.
- Findings indicated a decline in terms linking nicotine pouches to tobacco products, while convenience claims increased, suggesting a need for further research on how these marketing strategies impact perceptions and use, especially among youth.
Anesthetic challenges in pediatric robot-assisted surgeries.
Saudi J Anaesth
October 2024
Department of Anaesthesia and Pain Management, Max Super Speciality Hospital, Saket, New Delhi, India.
With the advent of minimally invasive surgeries, robot-assisted techniques have gained popularity because they overcome various shortcomings of standard laparoscopic surgeries. Despite the associated costs and limitations among the pediatric population, surgeon comfort due to the ergonomic design, in combination with enhanced three-dimensional high-fidelity imaging and tissue handling, may offer better surgical and postoperative outcomes. However, robotic surgeries require innovations with regard to patient positioning and the overall arrangement of operative equipment and personnel.
View Article and Find Full Text PDFMEMS-metasurface-enabled mode-switchable vortex lasers.
Sci Adv
November 2024
Centre for Nano Optics, University of Southern Denmark, Campusvej 55, Odense M DK-5230, Denmark.
Compared to conventional lasers limited to generating static modes, mode-switchable lasers equipped with adjustable optics significantly enhance the flexibility and versatility of coherent light sources. However, most current approaches to achieving mode-switchable lasers depend on conventional, i.e.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!