Article
Polymer Science
Yongzhi Ren, Weihua Li
Summary: The annihilation of typical individual defects in hexagonal cylinder-forming block copolymers is investigated using the self-consistent field theory (SCFT) in conjunction with the string method. The results show that new cylindrical domains are created via either a nucleation-like process or a fission-like process, whereas excessive domains are eliminated via a fusion-like or evaporation-like process.
Article
Polymer Science
Junying Yang, Qingshu Dong, Meijiao Liu, Weihua Li
Summary: This study investigates the self-assembly of cylinder-forming block copolymers under confinement and finds that the common phase sequence can only be maintained when the cylinder phase is not close to the boundaries of its phase region. Short B-blocks cause packing frustration and result in distortion of structures.
Article
Physics, Fluids & Plasmas
Laureano Ortellado, Daniel A. Vega, Leopoldo R. Gomez
Summary: Molecular dynamics simulations show that the shock compression of diblock copolymers can lead to a decrease in the lamellae period, favoring the mixing of polymer blocks and resulting in less segregated phases or even melting into an isotropic phase after the passage of the shock.
Article
Polymer Science
Jun Yuan, Xiang Liu, Yingying Wang, Guangjian Zeng, Gang Li, Xue-Hui Dong, Tao Wen
Summary: This study investigates the self-assembly behavior of chiral block copolymers under one-dimensional spatial confinement, revealing the formation of chiral nanostructures and the influence of shape and topology on self-assembly.
Article
Nanoscience & Nanotechnology
Tatiana Morozova, Nicolas A. Garcia, Jean-Louis Barrat, Gustavo S. Luengo, Fabien Leonforte
Summary: This study investigates the adsorption of hydrophilic flexible homopolymers on a substrate representing the surface of the hair using coarse-grained molecular dynamics simulations. The research examines the impact of polymer chain length and concentration on adsorbed structures, as well as the stability of these structures under a linear shear flow. The work aims to develop models of complex macromolecules interacting with realistic biological surfaces for the development of more ecofriendly industrial products.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Multidisciplinary
Seong Won Kim, Sangsik Park, Siyoung Lee, Daegun Kim, Giwon Lee, Jonghyun Son, Kilwon Cho
Summary: Researchers have successfully developed a stretchable high-performance organic semiconductor thin film by patterning and pinning a polymer semiconductor solution on an elastomeric substrate. This thin film exhibits superior stretchability and charge transport performance, making it suitable for applications in soft electronics.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Nanoscience & Nanotechnology
Hak Dong Cho, Juwon Lee, Deuk Young Kim, Sung Yun Chung, Jong-Kwon Lee
Summary: High-quality Bi2Se3 thin films with topological insulating properties are grown on a patterned sapphire substrate (PSS), showing enhanced light absorption and high crystallinity. The fabricated IR conversion device using Bi2Se3/PSS heterostructure exhibits excellent performance and high reliability. The enhanced device performance of Bi2Se3/PSS is confirmed by increased absorption spectra and improved light absorption distribution.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Review
Biochemistry & Molecular Biology
Yaning Gao, Chenchen Gao, Yirong Fan, Hui Sun, Jianzhong Du
Summary: This Review highlights the recent advances in the design principles, synthetic strategies, and biomedical applications of multicompartment polymersomes (MCPs). Different compartmentalization types and synthesis methods are discussed. Moreover, the diverse applications of MCPs in various fields are emphasized. Future perspectives for controlled synthesis and applications of MCPs are proposed.
Article
Mechanics
Chengxi Zhao, Zhao Zhang, Ting Si
Summary: The instability and dewetting of bounded liquid films at the nanoscale are found to be strongly influenced by thermal fluctuations. This study investigates the fluctuation-driven instability on a chemically heterogeneous substrate using a stochastic lubrication equation and molecular dynamics. The results show that slip and intermolecular forces enhance the fluctuation-driven instability, with the latter becoming dominant towards the final rupture. Additionally, the study suggests that a heterogeneous substrate can be approximated as a homogeneous one using effective slip lengths and Hamaker constants for the intermolecular forces, while the gradients of slip and intermolecular forces due to heterogeneity have little effect on the instability.
Article
Chemistry, Physical
Debjyoti Bhattacharya, Devon C. Kleeblatt, Antonia Statt, Wesley F. Reinhart
Summary: Self-assembly of dilute sequence-defined macromolecules is a complex phenomenon with a dependence on the sequence. In this study, supervised machine learning was used to accurately predict the morphology of aggregates formed by these macromolecules. High-throughput screening was also demonstrated to identify suitable sequences for self-assembly.
Article
Polymer Science
Ying Xu, Jun Yang, Zong-Fa Liu, Zhi-Ping Zhou, Zhao-Peng Liang, Tong-Fan Hao, Yi-Jing Nie
Summary: The study found that the volume fraction of beads of different blocks in asymmetric diblock copolymers is a key factor controlling the formation of stereocomplex crystallites, and the stereocomplex content can be regulated by adjusting the difference between the contents of beads of different blocks.
CHINESE JOURNAL OF POLYMER SCIENCE
(2021)
Article
Nanoscience & Nanotechnology
Tzyy-Jiann Wang, Nazar Riswana Barveen, Zhe-Yuan Liu, Ching-Hsiang Chen, Mei-Hua Chou
Summary: A high-performance flexible SERS substrate was fabricated using a simple drop and peel-off technique for ultrasensitive detection of pesticides. The substrate showed excellent detection sensitivity and stability, making it a promising tool for practical implementation of in-situ SERS detection on curved fruit/vegetable surfaces.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Multidisciplinary
Jade Poisson, Alexander M. Polgar, Michele Fromel, Christian W. Pester, Zachary M. Hudson
Summary: An oxygen-tolerant approach has been introduced for preparing surface-tethered polymer films of organic semiconductors directly from electrode substrates. The PET-RAFT method was used to prepare multiblock polymer architectures resembling multi-layer OLEDs, and the preparation of TADF and TAF trilayer OLED architectures was described. The surface-initiated (SI)-PET-RAFT approach allows enhanced control over layer thickness and spatial resolution in polymer brush patterning at low cost utilizing direct photomasking and a digital micromirror device.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Materials Science, Multidisciplinary
Lina Grineviciute, Tania Moein, Molong Han, Soon Hock Ng, Vijayakumar Anand, Tomas Katkus, Meguya Ryu, Junko Morikawa, Mark J. Tobin, Jitraporn Vongsvivut, Tomas Tolenis, Saulius Juodkazis
Summary: This study has demonstrated the deposition of 3D columnar micro-films/coatings on pre-patterned surfaces with sub-micrometer periodic patterns. Four-angle polarisation analysis was conducted on thin Si and SiO2 films deposited via glancing angle deposition (GLAD) using synchrotron infrared microspectroscopy. The research confirmed the angular dependence of absorbance and proposed the use of patterned SiO2 substrate coated by columnar SiO2 for retardance control in UV-visible applications.
OPTICAL MATERIALS EXPRESS
(2022)
Article
Chemistry, Multidisciplinary
Shaofei Song, Hang Zhou, Ian Manners, Mitchell A. Winnik
Summary: The study demonstrates that BCPs with polydisperse corona chains can lead to a broad range of uniform structures in a single pot via a single heating-cooling-aging process, potentially opening doors to useful applications.
Article
Polymer Science
Javier Diaz, Marco Pinna, Andrei V. Zvelindovsky, Ignacio Pagonabarraga
Article
Polymer Science
Javier Diaz, Marco Pinna, Andrei Zvelindovsky, Ignacio Pagonabarraga, Roy Shenhar
Article
Polymer Science
Javier Diaz, Marco Pinna, Andrei V. Zvelindovsky, Ignacio Pagonabarraga
Summary: This paper presents a parallel computational method using coarray Fortran for large systems of block copolymer melts and nanocomposites, achieving satisfactory strong scaling up to 512 cores but with a drop in performance up to 4096 cores. The parallel cell dynamic simulations scheme shows no drawbacks over MPI, providing an example of the simplicity of the coarray approach. The hybrid algorithm can achieve previously unavailable system sizes.
MACROMOLECULAR THEORY AND SIMULATIONS
(2021)
Article
Multidisciplinary Sciences
Javier Diaz, Marco Pinna, Andrei Zvelindovsky, Ignacio Pagonabarraga
Summary: This study uses 2D and 3D mesoscopic simulations to explore the phase behavior of block copolymer/nanoparticle systems, finding that the anisotropic ordered nanoparticles can enhance the lamellar phase of block copolymers and induce a phase transition. Anisotropic nanoparticles within circular-forming block copolymers lead to a competition between nematic colloidal ordering and hexagonally ordered mesophases.
ADVANCED THEORY AND SIMULATIONS
(2022)
Article
Polymer Science
Javier Diaz, Marco Pinna, Cullen Breen, Andrei Zvelindovsky, Ignacio Pagonabarraga
Summary: Block copolymer melts can control the location of nanoparticles through self-assembly into ordered nanoscopic structures, and thin films provide additional control due to confinement and surface selectivity. Mesoscopic simulations show that nanoparticles can modify the phase behavior and orientation of block copolymer nanocomposites under confinement, segregating towards specific regions of the block copolymer structure. Moreover, nanoparticles are found located in specific features of the block copolymer morphology and can induce phase transitions away from the perforated lamellar morphology.
Review
Polymer Science
Javier Diaz, Marco Pinna, Andrei V. Zvelindovsky, Ignacio Pagonabarraga
Summary: Block copolymer melts are excellent for positioning colloidal nanoparticles at the nanoscale and have wide applications in lithography. They can self-assemble into ordered structures where nanoparticles segregate based on polymer-particle interactions, size, and shape. The combination of the time-dependent Ginzburg-Landau model and Brownian dynamics provides an efficient mesoscopic model for studying block copolymer nanocomposites. This review focuses on recent developments and applications of this model.
Article
Chemistry, Physical
Javier Diaz, Marco Pinna, Andrei Zvelindovsky, Ignacio Pagonabarraga
Summary: Block copolymer nanocomposites with anisotropic nanoparticles can form complex structures with aligned nanoparticles. These anisotropic nanoparticles can induce a phase transition from sphere to cylinder by modifying the morphology of the block copolymer. Additionally, controlling the orientation of the nanoparticles can further control the global orientation of the block copolymer.
Article
Chemistry, Physical
Javier Diaz, Marco Pinna, Andrei Zvelindovsky, Ignacio Pagonabarraga
Article
Chemistry, Physical
Javier Diaz, Marco Pinna, Andrei Zvelindovsky, Ignacio Pagonabarraga
Article
Computer Science, Information Systems
Inayatullah Soomro, Israr Ahmed, Syed Baqer Shah, Abdul Majid, Raza Muhammad, Abdul Hameed, Ghulam Abas, Andrie Zvelindovsky, Marco Pinna, Waqar Ahmed
INTERNATIONAL JOURNAL OF COMPUTER SCIENCE AND NETWORK SECURITY
(2019)
