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  1. Article ; Online: Molecular-weight effects of a homopolymer on the AB- and ABC-stacks of perforations in block copolymer/homopolymer films.

    Sun, Ya-Sen / Liao, Yin-Ping / Hung, Hsiang-Ho / Chiang, Pei-Hsuan / Su, Chun-Jen

    Soft matter

    2024  Volume 20, Issue 3, Page(s) 609–620

    Abstract: We have demonstrated the molecular-weight effects of adding homopolystyrene (hPS) on the evolution of perforated layers and double gyroids in polystyrene- ...

    Abstract We have demonstrated the molecular-weight effects of adding homopolystyrene (hPS) on the evolution of perforated layers and double gyroids in polystyrene-
    Language English
    Publishing date 2024-01-17
    Publishing country England
    Document type Journal Article
    ZDB-ID 2191476-X
    ISSN 1744-6848 ; 1744-683X
    ISSN (online) 1744-6848
    ISSN 1744-683X
    DOI 10.1039/d3sm01249b
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Photoredox C-H functionalization leads the site-selective phenylalanine bioconjugation.

    Weng, Yue / Su, Chun-Jen / Jiang, Haoyang / Chiang, Chien-Wei

    Scientific reports

    2022  Volume 12, Issue 1, Page(s) 18994

    Abstract: Site-selectively chemical bioconjugation of peptides and proteins can improve the therapeutic exploration of modified protein drugs. Only 3.8% natural abundance of phenylalanine in protein and nearly 90% of proteins contain at least one phenylalanine ... ...

    Abstract Site-selectively chemical bioconjugation of peptides and proteins can improve the therapeutic exploration of modified protein drugs. Only 3.8% natural abundance of phenylalanine in protein and nearly 90% of proteins contain at least one phenylalanine residue in their sequenced, showing the potential in biopharmaceutical utility of the phenylalanine bioconjugation. However, the covalent bioconjugation of native phenylalanine is one of the most challenging problems in protein modification. Herein, an approach to protein modification is described that relies on a photoredox method for the site-selective bioconjugation of phenylalanine. This methodology has been validated on peptides as well as protein insulin using a straightforward and mild condition. In addition, based on characterization by near-UV CD spectroscopy and small angle X-ray scattering (SAXS), this pyrazole labeling approach permitted the insulin hexamer to completely dissociate into the monomeric form, thus making it a potential candidate for use as rapid-acting insulin for the treatment of diabetes.
    MeSH term(s) Phenylalanine/chemistry ; Scattering, Small Angle ; X-Ray Diffraction ; Proteins/chemistry ; Peptides/chemistry ; Insulin/chemistry
    Chemical Substances Phenylalanine (47E5O17Y3R) ; Proteins ; Peptides ; Insulin
    Language English
    Publishing date 2022-11-08
    Publishing country England
    Document type Journal Article
    ZDB-ID 2615211-3
    ISSN 2045-2322 ; 2045-2322
    ISSN (online) 2045-2322
    ISSN 2045-2322
    DOI 10.1038/s41598-022-23481-6
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Nanoarchitectonics of Nanocellulose Filament Electrodes by Femtosecond Pulse Laser Deposition of ZnO and

    Nguyen, Duong Tuan Anh / Wang, Ling / Imae, Toyoko / Su, Chun-Jen / Jeng, U-Ser / Rojas, Orlando J

    ACS applied materials & interfaces

    2024  Volume 16, Issue 17, Page(s) 22532–22546

    Abstract: Electroactive filament electrodes were synthesized by wet-spinning of cellulose nanofibrils (CNF) followed by femtosecond pulse laser deposition of ZnO (CNF@ZnO). A layer of conducting conjugated polymers was further adsorbed ... ...

    Abstract Electroactive filament electrodes were synthesized by wet-spinning of cellulose nanofibrils (CNF) followed by femtosecond pulse laser deposition of ZnO (CNF@ZnO). A layer of conducting conjugated polymers was further adsorbed by
    Language English
    Publishing date 2024-04-17
    Publishing country United States
    Document type Journal Article
    ISSN 1944-8252
    ISSN (online) 1944-8252
    DOI 10.1021/acsami.4c02780
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  4. Article ; Online: Stretchable and biodegradable chitosan-polyurethane-cellulose nanofiber composites as anisotropic materials

    Shih, Yu-Feng / Lin, Shih-Ho / Xu, Junpeng / Su, Chun-Jen / Huang, Chih-Feng / Hsu, Shan-Hui

    International Journal of Biological Macromolecules. 2023 Mar., v. 230 p.123116-

    2023  

    Abstract: Chitosan is a naturally derived biodegradable polymer with abundancy, sustainability, and ease of chemical modification. Polyurethanes are a family of elastic biocompatible polymers, and composites of polyurethanes have versatile properties and ... ...

    Abstract Chitosan is a naturally derived biodegradable polymer with abundancy, sustainability, and ease of chemical modification. Polyurethanes are a family of elastic biocompatible polymers, and composites of polyurethanes have versatile properties and applications. Chitosan-polyurethane composites were recently developed but had insufficient strength and limited stretchability. In the current study, cellulose nanofibers (CNFs) were integrated in chitosan-polyurethane composites to prepare stretchable and anisotropic materials. A biodegradable polyurethane was first synthesized, end-capped with aldehyde to become dialdehyde polyurethane (DP) nanoparticles, and added with CNFs to prepare the DP-CNF composite crosslinker (DPF). The waterborne DPF crosslinker was then blended with chitosan solution to make polyurethane-CNF-chitosan (DPFC) composites. After blending, DPFC may form hydrogel in ~33 min at room temperature, which confirmed crosslinking. Composite films cast and dried from the blends showed good elongation (~420.2 %) at 60 °C. Anisotropic films were then generated by tension annealing with pre-strain. The annealed films with 200 % pre-strain exhibited large elastic anisotropy with ~4.9 anisotropic ratio. In situ SAXS/WAXS analyses unveiled that rearrangement and alignment of the microstructure during tension annealing accounted for the anisotropy. The anisotropic composite films had the ability to orient the growth of neural stem cells and showed the potential for biomimetic and tissue engineering applications.
    Keywords aldehydes ; ambient temperature ; anisotropy ; biodegradability ; biomimetics ; cellulose nanofibers ; chitosan ; crosslinking ; hydrogels ; microstructure ; nanoparticles ; polyurethanes ; Cellulose nanofiber ; Polyurethane ; Stretchable films ; In situ SAXS/WAXS
    Language English
    Dates of publication 2023-03
    Publishing place Elsevier B.V.
    Document type Article ; Online
    ZDB-ID 282732-3
    ISSN 1879-0003 ; 0141-8130
    ISSN (online) 1879-0003
    ISSN 0141-8130
    DOI 10.1016/j.ijbiomac.2022.123116
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  5. Article ; Online: Fostering the Dense Packing of Halide Perovskite Quantum Dots through Binary-Disperse Mixing.

    Li, Shiang / Wang, Ziqi / Li, Yuhao / Su, Chun-Jen / Fu, Yuang / Wang, Yi / Lu, Xinhui

    ACS nano

    2023  Volume 17, Issue 20, Page(s) 20634–20642

    Abstract: Due to their versatile applications, perovskite quantum dot (PQD)-based optoelectrical devices have garnered significant research attention. However, the fundamental packing behavior of PQDs in thin films and its impact on the device performance remain ... ...

    Abstract Due to their versatile applications, perovskite quantum dot (PQD)-based optoelectrical devices have garnered significant research attention. However, the fundamental packing behavior of PQDs in thin films and its impact on the device performance remain relatively unexplored. Drawing inspiration from theoretical models concerning packing density with size mixtures, this study presents an effective strategy, namely, binary-disperse mixing, aimed at enhancing the packing density of PQD films. Comprehensive grazing-incidence small-angle X-ray characterization suggested that the PQD film consists of three phases: two monosize phases and one binary mixing phase. The volume fraction and population of the binary-size phase can be tuned by mixing an appropriate amount of large and small PQDs. Furthermore, we performed multi-length-scale all-atom and coarse-grained molecular dynamics simulations to elucidate the distribution and conformation of organic surface ligands, highlighting their influence on PQD packing. Notably, the mixing of two PQDs of different sizes promotes closer face-to-face contact. The densely packed binary-disperse film exhibited largely suppressed trap-assisted recombination, much longer carrier lifetime, and thereby improved power conversion efficiency. Hence, this study provides fundamental understanding of the packing mechanism of perovskite quantum dots and highlights the significance of packing density for PQD-based solar cells.
    Language English
    Publishing date 2023-10-03
    Publishing country United States
    Document type Journal Article
    ISSN 1936-086X
    ISSN (online) 1936-086X
    DOI 10.1021/acsnano.3c07688
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Controllable Black-to-Yellow Phase Transition by Tuning the Lattice Symmetry in Perovskite Quantum Dots.

    Li, Yuhao / Qin, Minchao / Wang, Yunfan / Li, Shiang / Qin, Zhaotong / Tsang, Sai-Wing / Su, Chun-Jen / Ke, Yubin / Lu, Xinhui

    Small (Weinheim an der Bergstrasse, Germany)

    2023  Volume 19, Issue 47, Page(s) e2303885

    Abstract: The black-to-yellow phase transition in perovskite quantum dots (QDs) is more complex than in bulk perovskites, regarding the role of surface energy. Here, with the assistance of in situ grazing-incidence wide-angle and small-angle X-ray scattering ( ... ...

    Abstract The black-to-yellow phase transition in perovskite quantum dots (QDs) is more complex than in bulk perovskites, regarding the role of surface energy. Here, with the assistance of in situ grazing-incidence wide-angle and small-angle X-ray scattering (GIWAXS/GISAXS), distinct phase behaviors of cesium lead iodide (CsPbI
    Language English
    Publishing date 2023-07-26
    Publishing country Germany
    Document type Journal Article
    ZDB-ID 2168935-0
    ISSN 1613-6829 ; 1613-6810
    ISSN (online) 1613-6829
    ISSN 1613-6810
    DOI 10.1002/smll.202303885
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  7. Article ; Online: Stretchable and biodegradable chitosan-polyurethane-cellulose nanofiber composites as anisotropic materials.

    Shih, Yu-Feng / Lin, Shih-Ho / Xu, Junpeng / Su, Chun-Jen / Huang, Chih-Feng / Hsu, Shan-Hui

    International journal of biological macromolecules

    2023  Volume 230, Page(s) 123116

    Abstract: Chitosan is a naturally derived biodegradable polymer with abundancy, sustainability, and ease of chemical modification. Polyurethanes are a family of elastic biocompatible polymers, and composites of polyurethanes have versatile properties and ... ...

    Abstract Chitosan is a naturally derived biodegradable polymer with abundancy, sustainability, and ease of chemical modification. Polyurethanes are a family of elastic biocompatible polymers, and composites of polyurethanes have versatile properties and applications. Chitosan-polyurethane composites were recently developed but had insufficient strength and limited stretchability. In the current study, cellulose nanofibers (CNFs) were integrated in chitosan-polyurethane composites to prepare stretchable and anisotropic materials. A biodegradable polyurethane was first synthesized, end-capped with aldehyde to become dialdehyde polyurethane (DP) nanoparticles, and added with CNFs to prepare the DP-CNF composite crosslinker (DPF). The waterborne DPF crosslinker was then blended with chitosan solution to make polyurethane-CNF-chitosan (DPFC) composites. After blending, DPFC may form hydrogel in ~33 min at room temperature, which confirmed crosslinking. Composite films cast and dried from the blends showed good elongation (~420.2 %) at 60 °C. Anisotropic films were then generated by tension annealing with pre-strain. The annealed films with 200 % pre-strain exhibited large elastic anisotropy with ~4.9 anisotropic ratio. In situ SAXS/WAXS analyses unveiled that rearrangement and alignment of the microstructure during tension annealing accounted for the anisotropy. The anisotropic composite films had the ability to orient the growth of neural stem cells and showed the potential for biomimetic and tissue engineering applications.
    MeSH term(s) Nanofibers/chemistry ; Chitosan/chemistry ; Cellulose/chemistry ; Polyurethanes/chemistry ; Anisotropy ; Scattering, Small Angle ; X-Ray Diffraction ; Polymers
    Chemical Substances Chitosan (9012-76-4) ; Cellulose (9004-34-6) ; Polyurethanes ; Polymers
    Language English
    Publishing date 2023-01-03
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 282732-3
    ISSN 1879-0003 ; 0141-8130
    ISSN (online) 1879-0003
    ISSN 0141-8130
    DOI 10.1016/j.ijbiomac.2022.123116
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    In stock of ZB MED Cologne/Königswinter

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  8. Article ; Online: Arrayed Pt Single Atoms via Phosphotungstic Acids Intercalated in Silicate Nanochannels for Efficient Hydrogen Evolution Reactions.

    Chang, Je-Wei / Su, Kuan-Hsuan / Pao, Chih-Wen / Tsai, Jin-Jia / Su, Chun-Jen / Chen, Jeng-Lung / Lyu, Lian-Ming / Kuo, Chun-Hong / Su, An-Chung / Yang, Hsiao-Ching / Lai, Ying-Huang / Jeng, U-Ser

    ACS nano

    2024  Volume 18, Issue 2, Page(s) 1611–1620

    Abstract: Single-atom catalysts, known for their high activity, have garnered significant interest. Currently, single-atom catalysts were prepared mainly on 2D substrates with random distribution. Here, we report a strategy for preparing arrayed single Pt ( ... ...

    Abstract Single-atom catalysts, known for their high activity, have garnered significant interest. Currently, single-atom catalysts were prepared mainly on 2D substrates with random distribution. Here, we report a strategy for preparing arrayed single Pt (Pt
    Language English
    Publishing date 2024-01-02
    Publishing country United States
    Document type Journal Article
    ISSN 1936-086X
    ISSN (online) 1936-086X
    DOI 10.1021/acsnano.3c09656
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: iso-BAI Guided Surface Recrystallization for Over 14% Tin Halide Perovskite Solar Cells.

    Chan, Pok Fung / Qin, Minchao / Su, Chun-Jen / Ye, Liping / Wang, Xuezhou / Wang, Yunfan / Guan, Xin / Lu, Zhen / Li, Gang / Ngai, To / Tsang, Sai Wing / Zhao, Ni / Lu, Xinhui

    Advanced science (Weinheim, Baden-Wurttemberg, Germany)

    2024  , Page(s) e2309668

    Abstract: Tin-based perovskite solar cells (PSCs) are promising environmentally friendly alternatives to their lead-based counterparts, yet they currently suffer from much lower device performance. Due to variations in the chemical properties of lead (II) and tin ( ...

    Abstract Tin-based perovskite solar cells (PSCs) are promising environmentally friendly alternatives to their lead-based counterparts, yet they currently suffer from much lower device performance. Due to variations in the chemical properties of lead (II) and tin (II) ions, similar treatments may yield distinct effects resulting from differences in underlying mechanisms. In this work, a surface treatment on tin-based perovskite is conducted with a commonly employed ligand, iso-butylammonium iodide (iso-BAI). Unlike the passivation effects previously observed in lead-based perovskites, such treatment leads to the recrystallization of the surface, driven by the higher solubility of tin-based perovskite in common solvents. By carefully designing the solvent composition, the perovskite surface is effectively modified while preserving the integrity of the bulk. The treatment led to enhanced surface crystallinity, reduced surface strain and defects, and improved charge transport. Consequently, the best-performing power conversion efficiency of FASnI
    Language English
    Publishing date 2024-03-27
    Publishing country Germany
    Document type Journal Article
    ZDB-ID 2808093-2
    ISSN 2198-3844 ; 2198-3844
    ISSN (online) 2198-3844
    ISSN 2198-3844
    DOI 10.1002/advs.202309668
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  10. Article ; Online: Complex Dispersion of Detonation Nanodiamond Revealed by Machine Learning Assisted Cryo-TEM and Coarse-Grained Molecular Dynamics Simulations.

    Kuschnerus, Inga C / Wen, Haotian / Ruan, Juanfang / Zeng, Xinrui / Su, Chun-Jen / Jeng, U-Ser / Opletal, George / Barnard, Amanda S / Liu, Ming / Nishikawa, Masahiro / Chang, Shery L Y

    ACS nanoscience Au

    2023  Volume 3, Issue 3, Page(s) 211–221

    Abstract: Understanding the polydispersity of nanoparticles is crucial for establishing the efficacy and safety of their role as drug delivery carriers in biomedical applications. Detonation nanodiamonds (DNDs), 3-5 nm diamond nanoparticles synthesized through ... ...

    Abstract Understanding the polydispersity of nanoparticles is crucial for establishing the efficacy and safety of their role as drug delivery carriers in biomedical applications. Detonation nanodiamonds (DNDs), 3-5 nm diamond nanoparticles synthesized through detonation process, have attracted great interest for drug delivery due to their colloidal stability in water and their biocompatibility. More recent studies have challenged the consensus that DNDs are monodispersed after their fabrication, with their aggregate formation poorly understood. Here, we present a novel characterization method of combining machine learning with direct cryo-transmission electron microscopy imaging to characterize the unique colloidal behavior of DNDs. Together with small-angle X-ray scattering and mesoscale simulations we show and explain the clear differences in the aggregation behavior between positively and negatively charged DNDs. Our new method can be applied to other complex particle systems, which builds essential knowledge for the safe implementation of nanoparticles in drug delivery.
    Language English
    Publishing date 2023-04-05
    Publishing country United States
    Document type Journal Article
    ISSN 2694-2496
    ISSN (online) 2694-2496
    DOI 10.1021/acsnanoscienceau.2c00055
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