The formation of zigzags, chevrons, Y-junctions, and line segments is demonstrated in thin films formed from cylindrical morphology silicon-containing conformationally asymmetric rod-coil diblock copolymers and triblock terpolymers under solvent annealing. Directed self-assembly of the block copolymers within trenches yields well-ordered cylindrical microdomains oriented either parallel or transverse to the sidewalls depending on the chemical functionalization of the sidewalls, and the location and structure of concentric bends in the cylinders is determined by the shape of the trenches. The innate etching contrast, the spontaneous sharp bends and junctions, and the range of demonstrated periodicity and line/space ratios make these conformationally asymmetric rod-coil polymers attractive for nanoscale pattern generation.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1021/acsami.0c22177 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Rare Earth Complex-Based Functional Materials: From Molecular Design and Performance Regulation to Unique Applications.
Acc Chem Res
January 2025
State Key Laboratory of Applied Organic Chemistry, Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China.
ConspectusRare earth (RE) elements, due to their unique electronic structures, exhibit excellent optical, electrical, and magnetic properties and thus have found widespread applications in the fields of electronics, optics, and biomedicine. A significant advancement in the use of RE elements is the formation of RE complexes. RE complexes, created by the coordination of RE ions with organic ligands, not only offer high molecular design flexibility but also incorporate features such as a broad absorption band and efficient energy transfer of organic ligands.
View Article and Find Full Text PDF2,3:6,7‒Naphthalenediimide-based Chiral Triangular Macrocycle: Self-Assembled Helix, Outer π-surface Directed Co-assembly and Circularly Polarized Luminescence.
Angew Chem Int Ed Engl
January 2025
Institute of Chemistry, CAS, Laboratory of Colloid and Interface Scie, Zhong Guancun, 100080, Beijing, CHINA.
Here, we report the synthesis and self-assembly of a novel chiral 2,3:6,7‒naphthalenediimide-based triangular macrocycle (NDI-∆) and their chiroptical properties. The enantiomeric NDI-∆ is synthesized by condensation of (RR) or (SS)-trans-1,2-cyclohexanediamine and 2,3,6,7-naphthalenetetracarboxylic 2,3:6,7-dianhydride, in which the chirality of the macrocycles is controlled by the diamine. With the rigid outer π-surface, the macrocycle showed unique chiroptical properties and self-assembly modes.
View Article and Find Full Text PDFDevelopment of a microbiome for phenolic metabolism based on a domestication approach from lab to industrial application.
Commun Biol
December 2024
Tianjin Key Laboratory of Industrial Biological Systems and Process Engineering, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, 300308, China.
Despite a lot of efforts devoted to construct efficient microbiomes, there are still major obstacles to moving from the lab to industrial applications due to the inapplicability of existing technologies or limited understanding of microbiome variation regularity. Here we show a domestication strategy to cultivate an effciient and resilient functional microbiome for addressing phenolic wastewater challenges, which involves directional domestication in shaker, laboratory water test in small-scale, gas test in pilot scale, water test in pilot scale, and engineering application in industrial scale. The domestication process includes the transition from water to gas, which provided complex transient environment for screening of a more adaptable and robust microbiome, thereby mitigating the performance disparities encountered when transitioning from laboratory experimentation to industrial engineering applications.
View Article and Find Full Text PDFHighly Sensitive Low-Frequency Acoustic Sensor Based on Functionalized Graphene Oxide.
Small
December 2024
State Key Laboratory of Precision Measurement Technology and Instruments, School of Precision Instruments and Optoelectronics Engineering, Tianjin University, Tianjin, 300072, China.
Developing miniaturized low-frequency acoustic sensors with high sensitivity is crucial for diverse applications, including geological monitoring and aerospace exploration. However, the performance of low-frequency acoustic sensor is constrained by the limited mechanical robustness of traditional sensing films at nanoscale thickness. Here, a functionalized graphene oxide (GO)-based Fabry-Perot (FP) low-frequency sensor is proposed, with characteristics of compact size, resistance to electromagnetic interference high-sensitivity low minimum detectable pressure (MDP), and a high signal-to-noise ratio (SNR).
View Article and Find Full Text PDFNanostructured Hydrogels of Carboxylated Cellulose Nanocrystals Crosslinked by Calcium Ions.
Gels
November 2024
Physics Department, Lomonosov Moscow State University, 119991 Moscow, Russia.
Bio-based eco-friendly cellulose nanocrystals (CNCs) gain an increasing interest for diverse applications. We report the results of an investigation of hydrogels spontaneously formed by the self-assembly of carboxylated CNCs in the presence of CaCl using several complementary techniques: rheometry, isothermal titration calorimetry, FTIR-spectroscopy, cryo-electron microscopy, cryo-electron tomography, and polarized optical microscopy. Increasing CaCl concentration was shown to induce a strong increase in the storage modulus of CNC hydrogels accompanied by the growth of CNC aggregates included in the network.
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!