Article
Chemistry, Physical
Achille Francone, Santos Merino, Aritz Retolaza, Jorge Ramiro, Sofia A. Alves, Joana Vieira de Castro, Nuno M. Neves, Ainara Arana, Jose M. Marimon, Clivia M. Sotomayor Torres, Nikolaos Kehagias
Summary: The development of antimicrobial surfaces is crucial in addressing current health crises such as the COVID-19 pandemic and antibiotic-resistant diseases. By introducing physical modifications to surfaces rather than relying on chemical agents, antibacterial properties can be enhanced to effectively combat bacterial attachment.
SURFACES AND INTERFACES
(2021)
Article
Chemistry, Physical
Ting Hu, Zhi Xing, Lu Huang, Dengxue Li, Xiangchuan Meng, Xiaotian Hu, Yiwang Chen
Summary: To address the limitations of two-dimensional perovskites in photovoltaic applications, a strategy for developing high-quality patterned 2D perovskites was proposed. The patterned films showed improved light absorption and interfacial contact, leading to enhanced efficiencies and stability of the solar cells.
CHEMISTRY OF MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Dong Hyun Kim, Jin Young Oh, Da-Bin Yang, Dong Wook Lee, Jonghoon Won, Jong In Jang, Hae-Chang Jeong, Dae-Shik Seo
Summary: A nanostructured composite of UV-curable polymer and TaO was successfully fabricated and analyzed using AFM, XRD, FTIR, and XPS. Increasing the content of UV-curable polymers in the composite enabled successful networking with TaO and transfer. The composite films showed excellent nanostructure transfer and thermal stability, as well as improved C-V characteristics compared to rubbed polyimide LC cells. Therefore, these nanostructured composites have great potential for LC devices.
JOURNAL OF NANOPARTICLE RESEARCH
(2023)
Article
Nanoscience & Nanotechnology
Minwook Park, Jongyoon Kim, Won-Jin Yoon, Seok-In Lim, Minwoo Rim, Youngjae Wi, Junhwa Jang, Mintaek Oh, Ji-Hoon Lee, Kwang-Un Jeong
Summary: Chemically functionalized organic-inorganic hybrid nanoparticles have been proposed for automatic liquid crystal (LC) alignment, but the challenge lies in achieving well-balanced self-assembly without wasting materials and causing harmful aggregation. In this paper, a promising homeotropic alignment (HA) nanosurfactant (C60D) with distinct molecular segments in LC affinity is introduced, which enables automatic construction of the HA nanolayer on the surface and guides the good alignment of LC molecules. The system exhibits exceptional material efficiency (0.01 wt %) and a reliable electro-optical switching modulator using C60D has been demonstrated. The developed HA-guide C60D nanosurfactant provides a way for LCD application and serves as a useful guideline for designing nanomaterials.
ACS APPLIED NANO MATERIALS
(2023)
Article
Engineering, Electrical & Electronic
Chia-Rong Sheu, Tse-Jen Wang, Chun-Hung Lin
Summary: This study demonstrates the fabrication of periodically unidirectional nano-wedges using nanoimprint lithography to improve LC alignments and optical performance in sandwiched LC cells. The experiment results show that nano-wedge structures can achieve better LC alignments and fewer disclination lines than nanorectangles in the cells.
MICRO AND NANO ENGINEERING
(2021)
Article
Chemistry, Physical
Dong Wook Lee, Dong Hyun Kim, Jin Young Oh, Yang Liu, Dae-Shik Seo
Summary: A convenient aligning method using nanoimprint lithography was introduced in this study, which utilized sol-gel-processed bismuth gallium oxide thin films one-dimensionally nanopatterned by polydimethylsiloxane molds for liquid crystal alignment. Experimental results show that this method achieved good results in LCD alignment.
APPLIED SURFACE SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
Seung-Rak Son, Jongil An, Jin-Wook Choi, Soyern Kim, Jisung Park, Jun Hyup Lee
Summary: This study presents a novel method utilizing alkylated graphene oxide for achieving homeotropic alignment of nematic liquid crystals, resulting in initial homeotropic orientation with excellent alignment ability and optical performance.
MATERIALS TODAY COMMUNICATIONS
(2021)
Article
Chemistry, Applied
Armen Tchobanian, Frederik Ceyssens, Mar Condor Salgado, Hans Van Oosterwyck, Pedro Fardim
Summary: The study synthesised dextran palmitates with a multipurpose functionality to modulate surface energy through surface chemistry and to be patterned, and produced films by spin coating and patterned by thermal nanoimprint lithography. These moderately hydrophobic films performed well in cell culture and guided multicellular arrangements on specific topographies after patterning.
CARBOHYDRATE POLYMERS
(2021)
Article
Nanoscience & Nanotechnology
Pengfei Cheng, Ronald Kampmann, Dong Wang, Stefan Sinzinger, Peter Schaaf
Summary: The study successfully fabricated high-quality, homogeneous arrays of inverted Si nanopyramids and Si nanopillars by precisely controlling the etching time and path. Experimental investigation of the optical properties indicates that the reflections of these Si nanostructures are mainly determined by their aspect ratio and period. Furthermore, visible-light scattering patterns on inverted Si nanopyramids and Si nanopillars can be precisely controlled by the nanostructures.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Analytical
Kihyeun Kim, Ki Joong Lee, Na Rae Jo, Eun-Jung Jo, Yong-Beom Shin, Min-Gon Kim
Summary: This study demonstrates a fabrication strategy for wafer-scale LSPR substrates using reproducible and high-throughput techniques. The LSPR substrates are fabricated by nanoimprint lithography, wet-etching, and thin film deposition, and are applied for label-free detection of biomolecule binding events.
Article
Chemistry, Physical
Federico Caimi, Giovanni Nava, Raouf Barboza, Noel A. Clark, Eva Korblova, David M. Walba, Tommaso Bellini, Liana Lucchetti
Summary: The article investigates the surface alignment of the ferroelectric nematic phase and finds specific behaviors and factors that affect the alignment, such as orientation, defects, and electric field response.
Article
Engineering, Electrical & Electronic
Ran Zhang, Da Huang, Yuanyi Fan, Xiao Liu, Ze Liu, Jinkui Chu
Summary: This study proposes a new method for fabricating nanochannels using nanoimprint lithography, with silicon nitride as a bonding layer to achieve efficient bonding between nanochannels and PDMS microchannels. Experimental results show that the fabricated nanochannels have high accuracy and strength, meeting the expected quality of fabrication.
JOURNAL OF MICROMECHANICS AND MICROENGINEERING
(2021)
Article
Materials Science, Multidisciplinary
Dayang Lin, Jinbo Liu, Ross Haroldson, Jiyoung Moon, Zhitong Li, Anvar Zakhidov, Wenchuang Hu, Qing Gu
Summary: This study overcomes the challenge of achieving high responsivity and fast speed simultaneously in metal-semiconductor-metal (MSM) perovskite photodetectors (PSPDs) by using a directly patterned nanograting methylammonium lead iodide (MAPbI3) film and interdigitated indium tin oxide (ITO) electrodes. The PSPDs exhibit excellent optoelectronic properties and maintain good photocurrent performance after 20 days of air exposure.
ADVANCED OPTICAL MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
Yang Liu, Shining Gao, He Lv, Dong Hyun Kim, Jianhua Shang, Yongfang Zhang, Yanan Liu, Dae-Shik Seo
Summary: Liquid crystals (LCs) are of great interest for electro-optical devices, and the alignment of LCs is crucial for their performance. Researchers have developed nanotips made of MoS(2) and Ti3C2T x MXene to modulate the switching of LCs. These nanotips penetrate the hybrid alignment layers, roughen the surface, and decrease the surface energy, leading to accelerated rewriting speed of optical data. The combination of nanotips and surface plasmon-polaritons (SPP) substantially reduces the operating voltage and response time of LC devices, showing promising applications for both traditional LC devices and optical rewritable LC devices.
ACS APPLIED NANO MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Kunpeng Ruan, Xuetao Shi, Yali Zhang, Yongqiang Guo, Xiao Zhong, Junwei Gu
Summary: The positive liquid crystals, 4'-heptyl-4-biphenylcarbonitrile (7CB), are used to functionalize carbon nanotubes (LC-CNT) and fabricate thermally conductive LC-CNT/LC-PI composite films through the oriented alignment of LC-CNT within the LC-PI matrix. The resulting composite films exhibit significantly improved thermal conductivity and mechanical properties compared to the intrinsically thermally conductive LC-PI films and CNT/LC-PI composite films.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Hae-Chang Jeong, Ju Hwan Lee, Dong Hyum Kim, Dong Wook Lee, Jeong Min Han, Byeong-Yun Oh, Tae Wan Kim, Dae-Shik Seo
Article
Polymer Science
Ju Hwan Lee, Hae-Chang Jeong, Jonghoon Won, Byeong-Yun Oh, Dong Hyun Kim, Dong Wook Lee, Yang Liu, Dae-Shik Seo
Article
Materials Science, Multidisciplinary
Ju Hwan Lee, Jonghoon Won, Hae-Chang Jeong, Dong Hyun Kim, Dong Wook Lee, Byeong-Yun Oh, Jeong-Min Han, Tae Wan Kim, Dae-Shik Seo
Article
Chemistry, Multidisciplinary
Ju Hwan Lee, Jonghoon Won, Hae-Chang Jeong, Dong Hyun Kim, Dong Wook Lee, Jeong-Min Han, Byeong-Yun Oh, Dae-Shik Seo
Article
Materials Science, Multidisciplinary
Hae-Chang Jeong, Jonghoon Won, Ju Hwan Lee, Dong Hyun Kim, Dong Wook Lee, Byeong-Yun Oh, Jeong-Min Han, Dae-Shik Seo
Article
Engineering, Electrical & Electronic
Ju Hwan Lee, Jonghoon Won, Hae-Chang Jeong, Dong Hyun Kim, Dong Wook Lee, In Ho Song, Byeong-Yun Oh, Jeong-Min Han, Dai-Hyun Kim, Dae-Shik Seo
JOURNAL OF THE SOCIETY FOR INFORMATION DISPLAY
(2019)
Article
Optics
Hae-Chang Jeong, Ju Hwan Lee, Jonghoon Won, Byeong Yun Oh, Dong Hyun Kim, Dong Wook Lee, In Ho Song, Yang Liu, Dae-Shik Seo
Article
Chemistry, Multidisciplinary
Jong Hoon Won, Ju Hwan Lee, Dong Hyum Kim, Dong Wook Lee, Dae-Hyun Kim, Hae-Chang Jeong, Byeong-Yun Oh, Jeong Min Han, Dae-Shik Seo
Article
Physics, Multidisciplinary
Byeong-Yun Oh, Yong Seob Park
JOURNAL OF THE KOREAN PHYSICAL SOCIETY
(2019)
Article
Chemistry, Physical
Myungwoo Son, Sang-Soo Chee, So-Young Kim, Wonki Lee, Yong Hyun Kim, Byoung-Yun Oh, Jun Yeon Hwang, Byoung Hun Lee, Moon-Ho Ham
Article
Chemistry, Multidisciplinary
Jonghoon Won, Hae-Chang Jeong, Ju Hwan Lee, Dong Hyun Kim, Dong Wook Lee, Byeong-Yun Oh, Yang Liu, Dae-Shik Seo
Article
Materials Science, Multidisciplinary
Se-Hoon Choi, Jin-Ah Kim, Sang-Yeon Lee, Kuck-Jin Hwang, Se-Yeong Park, Eun-Song Ji, Hong-Gyu Park
Summary: Combining rubbing process with an atmospheric plasma process improves liquid crystal alignment and electro-optical characteristics, resulting in lower driving voltage and more effective switching voltage. The thermal stability and alignment characteristics of LC displays treated using this combined method are superior to those treated with atmospheric plasma-only process. This study suggests a more efficient route to manufacturing high-performance LC displays.
Article
Materials Science, Ceramics
Jin-Ah Kim, Se-Hoon Choi, Hong-Gyu Park
Summary: We investigate the effect of varying solution-derived zinc oxide (ZnO) concentrations on liquid crystal (LC) alignment after treatment with atmospheric plasma. Uniform alignment of the LC alignment layer is crucial for high-performance displays. The combination of atmospheric plasma and inorganic alignment layer introduces a new efficient manufacturing process with potential applications in various fields. By analyzing the surface modification, LC alignment, and electro-optical characteristics, we find that increasing the ZnO concentration enhances the pretilt angle and dipole moment between LC molecules, leading to improved driving voltage and rapid response time (<20 ms) in the samples. Optimal process conditions for manufacturing ZnO alignment films are determined using the rubbing-atmospheric pressure plasma coprocessing technique.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2023)
Article
Materials Science, Ceramics
Myung-Gyun Baek, Sang-Seok Yun, Jin-Sa Kim, Hong-Gyu Park, Sang-Geon Park
Summary: In this study, the deposition of trimethoxy(propyl)silane as a self-assembled monolayer on the ITO substrate surface in OLEDs was investigated. The research focused on the changes in surface characteristics with variations in deposition time and temperature.
JOURNAL OF CERAMIC PROCESSING RESEARCH
(2022)
Article
Materials Science, Multidisciplinary
Hae-Chang Jeong, Jonghoon Won, Ju Hwan Lee, Dong Hyun Kim, Dong Wook Lee, Yun-Gun Lee, Byeong Yun Oh, Jeong Min Han, Dae-Shik Seo
ECS JOURNAL OF SOLID STATE SCIENCE AND TECHNOLOGY
(2019)
Article
Chemistry, Physical
Yiping Yin, Zhe Wang, Hua Zou
Summary: This study presents a novel method for preparing dimpled polymer-silica nanocomposite particles using interfacial swelling-based seeded polymerization. The optimized conditions allow for a relatively high percentage of dimpled particles to be achieved.
Article
Chemistry, Physical
Brenden D. Hoehn, Elizabeth A. Kellstedt, Marc A. Hillmyer
Summary: Porous materials with nanometer-scale pores have important applications as nanoporous membranes. In this study, ABA triblock copolymers were used as precursors to produce nanoporous polymeric membranes (NPMs) in thin film form by degrading the end blocks. Polycyclooctene (PCOE) NPMs with tunable pore sizes were successfully prepared using solvent casting technique. Oxygen plasma etching was employed to improve the surface porosity and hydrophilicity of the membranes. This study provides a straightforward method to produce tough NPMs with high porosity and hydrophilic surface properties.
Article
Chemistry, Physical
Vladislav S. Petrovskii, Stepan I. Zholudev, Igor I. Potemkin
Summary: This article investigates the behavior of linear and ring polypeptide chains in aqueous solution and explores the properties of the complexes formed by these chains with oppositely charged surfactants. The results demonstrate that the complexes of linear supercharged unfolded polypeptides and the corresponding surfactants exhibit impressive adhesive properties.
Article
Chemistry, Physical
Merve Cevik, Serkan Dikici
Summary: Cardiovascular diseases are a leading cause of death globally, and vascular grafts are a promising treatment option. This study focuses on tissue-engineered vascular grafts (TEVGs) using decellularized parsley stems as a potential biomaterial. The decellularized parsley stems showed suitable properties for TEVGs, providing a suitable environment for human endothelial cells to form a pseudo endothelium. This study showcases the potential of using parsley stems for TEVGs.
Article
Chemistry, Physical
Gustavo A. Vasquez-Montoya, Tadej Emersic, Noe Atzin, Antonio Tavera-Vazquez, Ali Mozaffari, Rui Zhang, Orlando Guzman, Alexey Snezhko, Paul F. Nealey, Juan J. de Pablo
Summary: The optical properties of liquid crystals are typically controlled by electric fields. In this study, we investigate the effects of microfluidic flows and acoustic fields on the molecular orientation and optical response of nematic liquid crystals. We identify several previously unknown structures and explain them through calculations and simulations. These findings hold promise for the development of new systems combining sound, flow, and confinement.
Article
Chemistry, Physical
Xinjun Wu, Xin Guan, Shushu Chen, Jiangpeng Jia, Chongyi Chen, Jiawei Zhang, Chuanzhuang Zhao
Summary: This research presents a novel shape memory hydrogel with a remodelable permanent shape and programmable cold-induced shape recovery behavior. The hydrogel is prepared using specific treatment methods to achieve shape fixation by heating and shape recovery by cooling. Additionally, deformable devices can be obtained by assembling hydrogel blocks with different concentrations.
Article
Chemistry, Physical
Rebecca Hengsbach, Gerhard Fink, Ulrich Simon
Summary: This study examines the properties of DNA functionalized pNipmam microgels and pure pNipmam microgels at different concentrations of sodium chloride and in PBS solutions using temperature dependent H-1-NMR measurements. The results show that DNA modification affects the volume phase transition temperature and the addition of salt and PBS further enhances this effect.
Article
Chemistry, Physical
Ningyi Li, Junhong Li, Lijingting Qing, Shicheng Ma, Yao Li, Baohui Li
Summary: This paper investigates the self-assembly behavior of colloids with competing interactions under spherical confinement and finds that different ordered structures can be formed under different sized spherical confinements. Moreover, more perforated structures are formed in smaller spheres.
