AI Article Synopsis
- The study investigates the structural and optical characteristics of 20 nm gold nanoparticles in two types of liquid crystals: one that is aligned (planar oriented) and one that is not (planar degenerate).
- The aligned liquid crystal allows the gold nanoparticles to arrange themselves parallel to the liquid crystal’s axis, while in the unaligned liquid crystal, the nanoparticles are randomly dispersed.
- Results indicate that the aligned nanoparticles exhibit greater linear and nonlinear optical absorption, which is linked to enhanced plasmon coupling, showcasing the potential for using liquid crystals to improve nanoparticle assembly for advanced optical technologies.
Article Abstract
We report structural and nonlinear optical properties of 20 nm gold (Au) nanoparticles (NPs) that are dispersed in planar degenerate (non-oriented) and planar oriented nematic liquid crystals (LCs) (4'-Pentyl-4-biphenylcarbonitrile-5CB). Taking advantage of elastic forces in the planar oriented nematic LC, we aligned AuNPs parallel to the 5CB director axis. In the case of planar degenerate, 5CB is not aligned and has no preferred orientation, forcing the AuNPs to disperse randomly. Results show that the linear optical absorption coefficient for the planar oriented 5CB/AuNPs mixture is larger than the corresponding planar degenerate sample. The nonlinear absorption coefficients are greatly enhanced in planar oriented samples at relatively high concentrations which can be attributed to plasmon coupling between the aligned AuNPs. This study demonstrates the utility of LCs for developing the assembly of NPs with enhanced optical properties which may offer important insight and technological advancement for novel applications, including photonic nanomaterials and optoelectronic devices.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1088/1361-6528/acdc2b | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Enhancing Photovoltaically Preferred Orientation in Wide-Bandgap Perovskite for Efficient All-Perovskite Tandem Solar Cells.
Adv Mater
January 2025
School of Optoelectronic Science and Engineering & Collaborative Innovation Center of Suzhou Nano Science and Technology, Key Lab of Advanced Optical Manufacturing Technologies of Jiangsu Province & Key Lab of Modern Optical Technologies of Education Ministry of China, Soochow University, Suzhou, 215006, China.
Wide-bandgap perovskite solar cells (WBG PSCs) have promising applications in tandem devices yet suffer from low open-circuit voltages (Vs) and less stability. To address these issues, the study introduces multifunctional nicotinamide derivatives into WBG PSCs, leveraging the regulation on photovoltaically preferential orientation and optoelectronic properties via diverse functional groups, e.g.
View Article and Find Full Text PDFMulti-Planar Cervical Motion Dataset: IMU Measurements and Goniometer.
Sci Data
January 2025
Department of Anatomy and Anthropology, Faculty of Medical & Health Sciences, Tel- Aviv University, Tel-Aviv, 699780, Israel.
This data descriptor presents a comprehensive and replicable dataset and method for calculating the cervical range of motion (CROM) utilizing quaternion-based orientation analysis from Delsys inertial measurement unit (IMU) sensors. This study was conducted with 14 participants and analyzed 504 cervical movements in the Sagittal, Frontal and Horizontal planes. Validated against a Universal Goniometer and tested for reliability and reproducibility.
View Article and Find Full Text PDFCryo-EM structure and oligomerization of the human planar cell polarity core protein Vangl1.
Nat Commun
January 2025
Shanghai Institute of Precision Medicine, Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China.
Vangl is a planar cell polarity (PCP) core protein essential for aligned cell orientation along the epithelial plane perpendicular to the apical-basal direction, which is important for tissue morphogenesis, development and collective cell behavior. Mutations in Vangl are associated with developmental defects, including neural tube defects (NTDs), according to human cohort studies of sporadic and familial cases. The complex mechanisms underlying Vangl-mediated PCP signaling or Vangl-associated human congenital diseases have been hampered by the lack of molecular characterizations of Vangl.
View Article and Find Full Text PDFConstruction of Linear Tetramer-type Acceptors for High-efficiency and High-stability Organic Solar Cells.
Angew Chem Int Ed Engl
January 2025
Shanghai Jiao Tong University, School of Chemistry and Chemical Engineering, 800 Dongchuan Road, Minhang, Shanghai, shanghai, CHINA.
The photovoltaic conversion efficiency (PCE) of organic solar cells (OSCs) has exceeded 20%, which has met the requirements for commercialisation. In the current stage, the main focus is to balance the performance and stability. It has been shown that all-polymer formulation can improve device stability, however, PCE is not in satifsfaction, and the batch-to-batch variation leads to quality control issues.
View Article and Find Full Text PDFHigh-throughput Design of Single-atom Catalysts with Nonplanar and Triple Pyrrole-N Coordination for Highly Efficient H2O2 Electrosynthesis.
Angew Chem Int Ed Engl
December 2024
Tianjin University, School of Materials Science and Engineering, Bldg 31, Tianjin, CHINA.
Single-atom catalysts (SACs) with nonplanar configurations possess unique capabilities for tailoring the oxygen reduction reaction (ORR) catalytic performance compared with the ones with planar configurations, owing to the additional orbital rearrangement arising from the asymmetric coordination atoms. However, the systematic investigation of these nonplanar SACs has long been hindered by the difficulty in screening feasible nonplanar configurations and precisely controlling the coordination structures. Herein, we demonstrate a combined high-throughput screening and experimental verification of nonplanar SACs (ppy-MN3) for highly active and selective 2e- ORR electrocatalysis.
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!