Article
Chemistry, Physical
Ofer Burg, Rajashekharayya A. Sanguramath, Elisheva Michman, Noga Eren, Inna Popov, Roy Shenhar
Summary: Alternating metallic nanostructures have hybrid properties, useful for photonics and catalysis. Block copolymer films serve as versatile templates for creating periodic nanowire arrays. By controlling the penetration depth of metal precursors, different layers of copolymer cylinders can be impregnated with different metals. This leads to the formation of nanowires with alternating compositions and periodic arrangement on substrates after plasma etching.
Article
Chemistry, Multidisciplinary
James J. J. Race, Alex Heyam, Matthew A. A. Wiebe, J. Diego-Garcia Hernandez, Charlotte E. E. Ellis, Shixing Lei, Ian Manners, Andrew S. S. Weller
Summary: An amphiphilic block copolymer of polyphos-phinoborane has been synthesized using a mechanism-led strategy and its self-assembly behavior has been studied.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Mingchao Ma, Runze Liu, Tingyu Su, Zehao Sun, Caroline A. Ross
Summary: Infiltration of metal precursor solution into P2VP microdomains reduces solvent vapor uptake, locking the morphology. Metal content in P2VP, such as Pt, increases with precursor and acid concentrations. Metal is then exfiltrated using a complexing solution, restoring solvent uptake and unlocking the morphology. The reversible locking and unlocking of block copolymer microdomain morphologies expand their utility for nanofabrication processes.
Article
Polymer Science
Dmitrii Ludin, Sergey D. Zaitsev, Alexey Markin, Ivan D. Grishin, Semen S. Sologubov, Tatyana A. Kovylina, Igor L. Fedushkin
Summary: A novel approach was developed to synthesize polylactide hybrid block copolymers with vinyl monomers using triethylborane and various p-quinones, showcasing the effectiveness of reversible-deactivation radical polymerization in improving thermal stability of the synthesized block copolymers.
POLYMER INTERNATIONAL
(2022)
Article
Nanoscience & Nanotechnology
Zhihan Liu, Yi-Xin Liu, Yuliang Yang, Jianfeng Li
Summary: This study attempts to solve the inverse design problem of guiding templates for directed self-assembly (DSA) patterns using machine learning methods. By treating it as a multi-label classification task, the study shows that templates can be predicted without forward simulations. Different neural network (NN) models, including a 32-layer CNN with 8 residual blocks, were trained using simulated pattern samples generated by self-consistent field theory calculations. The best model achieved an accuracy of 97.1% in predicting the template for simulated patterns, demonstrating excellent generalization ability.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Daniel M. Loh, Matthew Nava, Daniel G. Nocera
Summary: The use of conductive polypyrrole-silicon nanowire devices for intracellular delivery shows comparable kinetics to solution-based methods, but with significantly less cargo loading required. This hybrid polymer-semiconductor platform extends existing intracellular delivery methods and connects electrical signaling from artificial systems to biological molecular transduction.
Article
Materials Science, Coatings & Films
Pierre Giovanni Mani-Gonzalez, Caitlin McFeely, Matthew Snelgrove, Kyle Shiel, Jesus Alfredo Hernandez Marquez, Robert O'Connor
Summary: Vapor phase infiltration (VPI) is a bottom-up process that involves the infiltration of polymers with atomic layer deposition compatible precursors. By combining different receptive and rejecting polymers, complex nanopatterns can be created, offering a route to area selective deposition. The successful incorporation of titanium into polymer films was demonstrated through XPS analysis and VPI treatments without breaking vacuum.
JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A
(2021)
Article
Chemistry, Multidisciplinary
Tandra Ghoshal, Ramsankar Senthamaraikannan, Matthew T. Shaw, Ross Lundy, Andrew Selkirk, Michael A. Morris
Summary: The study demonstrated the fabrication of sub-20 nm gate-all-around silicon nanowire field effect transistor structures using self-assembly techniques with a block-copolymer-assisted hard mask approach. This involved creating nanopatterned Si feature arrays on a topographically patterned substrate, achieving dot and line nano-patterns through a thermo-solvent approach utilizing polystyrene-b-poly-(ethylene oxide) block copolymers.
Article
Nanoscience & Nanotechnology
Fei Yu, R. Paxton Thedford, Konrad R. Hedderick, Guillaume Freychet, Mikhail Zhernenkov, Lara A. Estroff, Katja C. Nowack, Sol M. Gruner, Ulrich B. Wiesner
Summary: Recent developments in quantum materials have shown promise in revolutionizing energy and information technologies. By utilizing block copolymers and niobia sol precursors, we successfully prepared mesoporous niobium carbonitride thin film superconductors through a scalable solution processing approach. This cost-effective and scalable method holds great potential for integration into existing microelectronics processing, combining the capabilities of soft matter self-assembly with quantum materials.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Materials Science, Multidisciplinary
Ze-Qi Li, Ping Guo, Yi-Ge Zhou
Summary: Dip-pen nanolithography is a scanning probe lithography technique that can write inks directly on a surface with high resolution. It has enabled a wide range of applications in synthesizing nanomaterials and various other fields over the past two decades.
ADVANCED MATERIALS TECHNOLOGIES
(2021)
Article
Chemistry, Physical
Trevor B. Demille, Robert D. Neal, Arin S. Preston, Zijuan Liang, Allen G. Oliver, Robert A. Hughes, Svetlana Neretina
Summary: This study demonstrates a novel liquid-phase seed-mediated synthesis method for fabricating arrays of gold nanoplates directly on substrate surfaces with high precision in position and orientation, resulting in highly faceted structures with a plasmonic response. The technique advances the integration of single-crystal nanomaterials with wafer-based technologies and provides leading-edge capabilities in defining large-area arrays of plasmonic structures.
Article
Polymer Science
Dimitrios Selianitis, Stergios Pispas
Summary: We synthesized a new series of thermo- and pH-responsive hyperbranched copolymers and studied their self-assembly in aqueous media. The copolymers showed the formation of nano-aggregates responsive to changes in temperature and pH. Encapsulation experiments with a hydrophobic drug also showed promising results. These hyperbranched copolymers have potential as nanocarrier systems for medicinal applications.
Article
Chemistry, Multidisciplinary
Anthony Keyes, Huong Dau, Krzysztof Matyjaszewski, Eva Harth
Summary: A new orthogonal radical/spin coupling technique has been identified in this study, which enables living insertion and controlled radical polymerization of polyolefins. This technique shows broad tolerance for different radical/spin traps and can be used for the synthesis of polyolefin-polyvinyl block copolymers with various segments.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Chemistry, Multidisciplinary
Martyna Michalska, Sophia K. Laney, Tao Li, Manish K. Tiwari, Ivan P. Parkin, Ioannis Papakonstantinou
Summary: By utilizing a versatile fabrication process and controlling the height and diameter of a hard mask, tailored silicon nanostructures can be achieved. The method is scalable and highly controllable, enabling uniform patterning of a 6-inch wafer.
Article
Polymer Science
Isaac Shin, Kyu Hyo Han, Seung Keun Cha, Sang Ouk Kim, Myungeun Seo
Summary: In this study, a functional block copolymer PMATA-b-PS was synthesized and used as a template for patterning Ag nanoarrays. The experiment successfully demonstrated the fabrication of Ag nanoparticle arrays through selective association with PMATA cylinders and removal of the organic polymer layer.
Article
Chemistry, Multidisciplinary
Ye Chan Kim, So Youn Kim
Summary: A highly aligned single-grain 2D nanoarray over a large area has been produced using self-directed assembly in block copolymer thin films. This method eliminates the need for expensive lithographic techniques and is suitable for large-scale nanopatterning.
Article
Chemistry, Multidisciplinary
Gyeong Min Choi, Minji Park, Yul Hui Shim, So Youn Kim, Mina Namvari, Heon Sang Lee
Summary: The study introduces a simple method for mass production of 3D microtubes made of graphene oxide (GO) while preserving their 2D properties by rolling up GO sheets with shear force. GO mesotubes are formed by shear flow in aluminum-glass parallel plates, with redox reaction playing a vital role in their formation. The high yield of 94% is achieved at an initial pH of 2.2, with no re-stacking of GO sheets in the tube wall, demonstrating potential applications in soft robotics, e-skins, and visible light sensors.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Chemistry, Physical
Sol Mi Oh, Chae Han Lee, So Youn Kim
Summary: Studies have shown that processing conditions may have a greater impact on particle dispersion and properties of polymer nanocomposites than intrinsic parameters. Different preparation pathways can result in varied particle structures, with these nonequilibrium effects persisting over time and determining the long-term stability of particle dispersion.
Article
Chemistry, Physical
Myung-Jin Baek, Jieun Choi, Tae-Ung Wi, Hyeong Yong Lim, Min Hoon Myung, Chanoong Lim, Jinsu Sung, Jeong-Sun Park, Ju Hyun Park, Yul Hui Shim, Jaehyun Park, Seok Ju Kang, Youngsik Kim, So Youn Kim, Sang Kyu Kwak, Hyun-Wook Lee, Dong Woog Lee
Summary: In this study, the adhesion stability of the electrocatalyst/current collector interface is significantly enhanced by using synthesized catechol-derivative hydrophilic binders, whereas catalyst desorption and carbon corrosion are effectively prevented. The study also reveals insights into how polymeric binders impact the adhesion mechanism and battery performance of SAB based on their functional groups.
JOURNAL OF MATERIALS CHEMISTRY A
(2022)
Correction
Chemistry, Multidisciplinary
Gyeong Min Choi, Minji Park, Yul Hui Shim, So Youn Kim, Mina Namvari, Heon Sang Lee
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Seong Eun Kim, Dong Hyup Kim, So Youn Kim
Summary: A precise interface control is essential for successful nanopatterning, and frustrated interfacial self-assembly (FISA) of block copolymers (BCPs) provides a simple method to achieve highly aligned and perpendicularly oriented sub-10-nm BCP patterns.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Dong Hyup Kim, So Youn Kim
Summary: This study introduces a directed self-assembly strategy to control the pattern direction of strand morphology by gradual morphology transition, and successfully fabricates highly aligned nanostrand arrays in a large area. In addition, a method for density-doubled metal nanowire fabrication and hierarchical BCP nanopatterning using the aligned nanostrand array as a template is demonstrated.
ADVANCED MATERIALS INTERFACES
(2022)
Article
Materials Science, Biomaterials
Jie Ying Teoh, Suhwan Jeon, Bora Yim, Hae Min Yang, Yunseo Hwang, Juhui Kim, Su-Kyoung Lee, Eunyoung Park, Tae Yeon Kong, So Youn Kim, Yongdoo Park, Young Gyu Kim, Jongseong Kim, Dongwon Yoo
Summary: The study demonstrates that by tuning the physical properties of nanoscale hydrogel matrix, the sensitivity of MPB-based SPR sensors can be modulated for effectively detecting PD-1Ab within specific concentration ranges.
ACS BIOMATERIALS SCIENCE & ENGINEERING
(2022)
Article
Nanoscience & Nanotechnology
Sol Mi Oh, So Youn Kim
Summary: Controlling the nanoparticle interface is critical in determining the structure and property of polymer nano composites (PNCs). In addition, the processing condition of PNCs, specifically the type of the initial solvent, plays an important role in their properties. The size of nanoparticles (NPs) also affects the microstructures and rheological properties of PNCs.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Physical
Yul Hui Shim, So Youn Kim
Summary: This study investigates the in-situ analysis of structural deformation for 2D colloidal liquid crystals, focusing on the reorientation of the liquid crystal under oscillatory shear. The results show that the addition of polymers can effectively control the macroscopic alignment of the liquid crystal. This research is of great significance for understanding and controlling the microstructure and physical properties of 2D colloidal liquid crystals.
Article
Chemistry, Multidisciplinary
Ye Chan Kim, Russell J. Composto, Karen I. Winey
Summary: Precise control of nanoparticles at interfaces can be achieved by tuning the pH of buffer solution to selectively adsorb nanoparticles according to size using a polymer brush. A facile polymer brush preparation method was developed using a symmetric PS-b-P2VP block copolymer deposited on a grafted polystyrene layer. The pH of the buffer solution was used to tailor the interactions between citrate-coated AuNPs and the P2VP block, resulting in size selectivity for nanoparticle adsorption.
Article
Chemistry, Physical
Yul Hui Shim, Eun Ho Cho, So Youn Kim
Summary: This study investigates the relationship between the microstructure and rheological properties of graphene oxide (GO) suspensions, and provides guidelines for tuning the rheological properties of 2D colloids.
Article
Polymer Science
Na Kyung Kwon, Taewon Kim, Seunghan Yun, Hyunhong Kim, Hyun-Wook Lee, Jongnam Park, So Youn Kim
Summary: The researchers introduced PNCs as CPEs, using a low molecular weight poly(ethylene glycol) matrix and dopamine-modified silica nanoparticles. The PNCs showed high ionic conductivity and shear modulus at room temperature. The study found that densely interconnected supramolecular particle networks effectively addressed the low ionic conductivity issues associated with CPEs.
Article
Chemistry, Physical
Molly K. Shave, Yitian Zhou, Jiwon Kim, Ye Chan Kim, Jaime Hutchison, Denis Bendejacq, Mark Goulian, Jonghoon Choi, Russell J. Composto, Daeyeon Lee
Summary: This study presents a microfluidic approach to evaluate the effectiveness of an antifouling surface treatment using sulfobetaine silane (SBS) in facilitating bacteria detachment under shear. The results demonstrate that significantly fewer bacteria remain on the SBS-functionalized surfaces when exposed to shear rates ranging from 10(4) to 10(5) s(-1), showing the potential of sulfobetaine as effective antifouling coatings.
