Article
Nanoscience & Nanotechnology
Eun Goo Lee, Yong Jun Gong, Sung-Eun Lee, Hyun-Jae Na, Changik Im, Heebae Kim, Youn Sang Kim
Summary: By incorporating polyaniline (PANI) into metal oxide matrix, the electrical characteristics and stability of metal oxide thin-film transistors (TFTs) can be significantly improved.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Multidisciplinary
Dehong Zhou, Chentong Liao, Shaoqian Peng, Xiaopeng Xu, Yuanyuan Guo, Jianlong Xia, Huifeng Meng, Liyang Yu, Ruipeng Li, Qiang Peng
Summary: Three high-performance polymer acceptors with different fluorine atoms were developed to fine-tune their optoelectronic properties. The crystallization behavior and miscibility between acceptor and donor were improved, enabling efficient charge separation and transport and achieving higher power conversion efficiency and fill factor in the resulting devices.
Article
Chemistry, Physical
Terek Li, Yuhang Huang, Jia Xi Mary Chen, Yu-Chen Sun, Omid Aghababaei, Zia Saadatnia, Hani E. Naguib
Summary: The synthesis of conductive polymer aerogels with controlled geometry and improved electrical conductivity and thermoelectric output has been achieved through a combination of 3D printing and tertiary doping process. This opens up new opportunities for enhancing the performance of conductive polymers without relying on additives.
Article
Chemistry, Multidisciplinary
Rui Zheng, Zhi-Hua Fu, Wei-Hua Deng, Yingyi Wen, Ai-Qian Wu, Xiao-Liang Ye, Gang Xu
Summary: This study demonstrates a novel self-limiting and self-repairing thin-film growth mechanism, which achieves high-quality MOF thin films with preferred in-plane orientations at the bottom. This is very helpful for optimizing the LBL-LPE method, understanding the growth cycle-dependent properties of MOF thin films, and inspiring investigations of biomimetic self-repairing materials.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Chemistry, Multidisciplinary
Wendong Liu, Zhihui Lei, Wenkui Xing, Jiacheng Xiong, Yingyue Zhang, Peng Tao, Wen Shang, Benwei Fu, Chengyi Song, Tao Deng
Summary: In this paper, multiresponsive actuators based on asymmetric design of graphene-conjugated poly(3,4-ethylene dioxythiophene): poly(styrenesulfonate)(PEDOT:PSS) gradient films have been developed using a simple drop casting method. These graphene-based actuators exhibit reversible bending behavior under multiple stimuli and have demonstrated potential applications in flexible electronics and energy harvesting/storage devices, as well as soft robotics, artificial muscles, wearable electronics, and smart sensors.
Article
Nanoscience & Nanotechnology
Saiyin Hou, Haiqi Chen, Dong Lv, Wei Li, Xuelei Liu, Qiang Zhang, Xinhong Yu, Yanchun Han
Summary: Inkjet-printed conductive polymer PEDOT:PSS films have been developed as stretchable transparent electrodes in optoelectronic devices. By printing a formulated ink containing PEDOT:PSS, formamide, d-sorbitol, sodium dodecyl benzene sulfonate, and ethylene glycol, a uniform film with high conductivity and mechanical performance is achieved. The film shows a high conductivity of 1050 S/cm, sheet resistance of less than 145 omega/sq, and can maintain stability even after 200 cycles of stretching at 55% strain. The enhanced conductivity is due to the conformational transition of the backbone through secondary doping and post-treatment with formamide, as well as the removal of excess PSS components after phase separation.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Multidisciplinary Sciences
Yong-Rae Jang, Robin Jeong, Hak-Sung Kim, Simon S. Park
Summary: This study utilized a hybrid copper ink and nickel electroplating to achieve the preparation of copper printed electrodes with improved solderability through various experiments and analytical methods. The research found that by using techniques such as masking and nickel electroplating, the solder strength and conductivity of the printed electrodes could be significantly improved.
SCIENTIFIC REPORTS
(2021)
Article
Chemistry, Multidisciplinary
Qiang Wu, Wei Wang, Yao Wu, Zeng Chen, Jie Guo, Rui Sun, Jing Guo, Yang (Michael) Yang, Jie Min
Summary: In this study, a high-efficiency PBDB-T/PYT all-organic solar cell was successfully fabricated using a special LbL deposition technique, achieving an efficiency of 15.17% through synergistic control of additive dosages. It was found that this synergistic control of additive dosages was also confirmed in other photovoltaic systems.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Review
Chemistry, Multidisciplinary
Shisong Nie, Zaifang Li, Yuyuan Yao, Yingzhi Jin
Summary: PEDOT, the most popularly used conductive polymer, is favored for its high conductivity, stability, transparency, and easy processing. Its synthesis methods, including chemical polymerization, electrochemical polymerization, and transition metal-mediated coupling polymerization, play a crucial role in determining its properties and applications. Future research directions to acquire high-quality PEDOT are also discussed in this review.
FRONTIERS IN CHEMISTRY
(2021)
Article
Chemistry, Analytical
Kiwon Park
Summary: This study developed a bracelet-type wearable sensor to detect four motions of the forearm using a conductive layer on a polymer film, achieving high accuracy in motion detection.
Article
Polymer Science
Junpeng Xu, Chih-Yu Fu, Yu-Liang Tsai, Chui-Wei Wong, Shan-hui Hsu
Summary: Conductive thin films with thermoresponsive, hydrophilic, strain sensing, and biocompatible properties were successfully synthesized in this study. The mechanical properties of the thin films were significantly enhanced by heat treatment, and they showed great potential for applications in neural stem cell culture.
Article
Chemistry, Multidisciplinary
Beate Krause, Petra Poetschke
Summary: This study investigates the addition of polyethylene glycol (PEG) as an n-dopant during the melt-mixing of conductive composites, achieving a change in the sign of the Seebeck coefficient from positive to negative for three different polymer types. The maximal power factors vary depending on the polymer used.
Article
Materials Science, Multidisciplinary
Lixin Liu, Xiaojing Zhang, Han Ma, Zhigang Shen
Summary: In this study, p-type doped graphene was achieved through liquid phase reaction and used to prepare high-performance graphene-based conductive inks. The ink exhibited good conductivity and mechanical properties for flexible electronics applications.
SCIENCE CHINA-MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Jiayi Li, Dong Xiang, Peng Su, Chunxia Zhao, Hui Li, Zhenyu Li, Bin Wang, Ping Wang, Yuntao Li, Yuanpeng Wu
Summary: In this study, a high-performance flexible strain sensor was fabricated by biaxial stretching using a double-layer structure of conductive polymer composites (CPCs). The results showed that the double-layer structure design improved the processability of the CPCs during biaxial stretching. The biaxial stretching process reorganized the conductive pathway, reducing the electrical conductivity of the CPCs while improving the sensing performance of the sensors through enhanced dispersion and planar orientation of carbon nanotubes (CNTs).
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Siyi Luo, Zhen Xu, Fei Zhong, Hui Li, Lidong Chen
Summary: This review article revisits the fundamental principles and characterization methods of charge transfer mechanisms in molecular doping of organic semiconductors. It highlights the key points for the formation of integer charge transfer (ICT) and charge transfer complex (CTC) from both molecular structure and process engineering aspects. The strategies to improve the proportion of ICT are discussed, and the challenges and perspectives for future developments in molecular doping of polymer semiconductors are provided.
CHINESE CHEMICAL LETTERS
(2024)
Article
Materials Science, Multidisciplinary
Neng Hu, Lei Shi, Shangchao Ji, Weijia Wang, Lin Lei, Huiqing Fan, Peter Mueller-Buschbaum, Qi Zhong
Summary: An adhesive and visualized hydrogel-based detector is designed to monitor the solar radiation dose required for plant growth by the discoloration of methylene blue (MB) under sunshine. The hybrid hydrogels prepared from photoinitiated polymerization on the graphitic carbon nitride (g-C3N4) surface and polypropylene (PP) fabrics as a substrate enable better photodegradation capability and improved mechanical properties of the hydrogel-based detector. By pasting the detector on the leaf of a plant, the radiation dose can be accurately traced from the change in color to ensure sufficient radiation for plant growth and avoid burn to the leaves under sunlight.
ADVANCED ENGINEERING MATERIALS
(2023)
Article
Polymer Science
Julija Reitenbach, Christina Geiger, Peixi Wang, Apostolos Vagias, Robert Cubitt, Dirk Schanzenbach, Andre Laschewsky, Christine M. Papadakis, Peter Mueller-Buschbaum
Summary: The swelling behavior of PNIPMAM thin films containing magnesium salts in water vapor is investigated for their potential applications as nanodevices. In situ time-of-flight neutron reflectometry is used to probe the extent and kinetics of the swelling ratio and water content. In situ Fourier-transform infrared (FTIR) spectroscopy and two-dimensional FTIR correlation analysis are utilized to study the solvation events and enhance the sensitivity of PNIPMAM thin films. The addition of Mg(ClO4)2 or Mg(NO3)2 results in higher water uptake and thickness gain in the swollen state, with Mg(NO3)2 showing the highest relative water uptake.
Article
Nanoscience & Nanotechnology
Nianci Guan, Guo Wu, Jian Wang, Yaqi Bao, Wei Hui, Zhaoqi Deng, Lei Gu, Xingyu Gao, Jing Zhang, Peter Muller-Buschbaum, Lin Song
Summary: Polymerized ionic liquid additives improve the efficiency and stability of perovskite solar cells. By incorporating the polymeric ILs into perovskite films and solar cells, the problems of aggregation and evaporation can be overcome, and the crystallization behavior of perovskite films and charge-carrier transport can be improved, resulting in highly efficient and stable solar cells.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Nanoscience & Nanotechnology
Hongmei Zhu, Qingqian Wang, Kun Sun, Wei Chen, Jun Tang, Junjie Hao, Zhaojin Wang, Jiayun Sun, Wallace C. H. Choy, Peter Muller-Buschbaum, Xiao Wei Sun, Dan Wu, Kai Wang
Summary: The chirality of 2D chiral perovskite films has been significantly enhanced by a solvent modulation strategy, leading to the formation of CPL-active materials. By creating chiral perovskite/quantum dot composites, an increase in the CPL intensity was observed, attributed to the generation and transportation of spin-polarized charge carriers as well as the enlarged lattice distortion of the chiral perovskite films achieved through solvent modulation. This approach provides an effective way to construct CPL-active materials.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Lucas Stieglitz, Christina Geiger, Paula F. F. Grossmann, Moritz Kraenzlein, Katia Rodewald, Peter Mueller-Buschbaum, Bernhard Rieger
Summary: This work presents the fiber spinning of tailored isotactic polypropylene (iPP) by melt spinning and melt drawing, obtaining fibers with an adjustable diameter of 40-400 µm. The crystallinity of the fibers is increased through thermal annealing and analyzed using differential scanning calorimetry (DSC) and wide angle X-ray scattering (WAXS). Comparing the mechanical performance, ultra-high molecular weight iPP (UHMW-iPP) fibers exhibit superior tensile strength (up to 400 MPa) compared to commercially available fibers (approximately 50 MPa). However, UHMW-iPP has a limited timeframe for extrusion, after which extrusion rupture occurs likely due to increased melt viscosity.
Review
Energy & Fuels
Kun Sun, Peter Mueller-Buschbaum
Summary: This article reviews the effects of moisture on halide perovskite films, including the degradation mechanism and methods to enhance stability. The benefits of incorporating a certain amount of water into perovskite films are discussed, as well as the moisture-induced structural degradation and decomposition process. The methods to enhance moisture stability, particularly 3D/2D heterostructures, are also highlighted.
Editorial Material
Multidisciplinary Sciences
Peter Mueller-Buschbaum
NATIONAL SCIENCE REVIEW
(2023)
Article
Chemistry, Multidisciplinary
Leon Katzenmeier, Manuel Goesswein, Leif Carstensen, Johannes Sterzinger, Michael Ederer, Peter Mueller-Buschbaum, Alessio Gagliardi, Aliaksandr S. Bandarenka
Summary: The interface between metallic lithium and solid-state electrolytes is investigated to understand the charge and mass transport mechanisms and the underlying mechanisms of charge accumulation. This is crucial for developing high-performance solid-state batteries.
COMMUNICATIONS CHEMISTRY
(2023)
Article
Nanoscience & Nanotechnology
Anna Lena Oechsle, Tobias Schoener, Lewin Deville, Tianxiao Xiao, Ting Tian, Apostolos Vagias, Sigrid Bernstorff, Peter Mueller-Buschbaum
Summary: The influence of humidity on the resistance properties of post-treated PEDOT:PSS films was investigated. It was found that elevated humidity increased the resistance of reference samples without post-treatment, while the post-treated samples showed a reverse behavior. Morphological changes in the film, such as increased PEDOT domain distances, were observed with in situ GISAXS measurements. This led to a deterioration in interdomain hole transport and a rise in resistance. Additionally, EIS measurements revealed additional contributions of ionic charge carriers in the post-treated PEDOT:PSS films.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Nanoscience & Nanotechnology
Zheng Fang, Huawei Xu, Qiang Xu, LiuBang Meng, Nan Lu, Renhong Li, Peter Mueller-Buschbaum, Qi Zhong
Summary: Inspired by the transpiration in tree stem, a multi-scale micro-nano channel structure was formed by directional freezing, redox polymerization, and nanoparticles-induced porosity in a hybrid P(AAm/DA)-Ag/MgO hydrogel coating cross-linked on microfiber-based polyurethane. This structure significantly increased the specific surface area and enabled efficient formaldehyde removal by the hydrogels and degradation by the Ag/MgO nanoparticles. The cross-linked hybrid hydrogel coating on polyurethane also demonstrated good anti-bacterial capability.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Shahidul Alam, Haya Aldosari, Christopher E. Petoukhoff, Tomas Vary, Wejdan Althobaiti, Maryam Alqurashi, Hua Tang, Jafar I. Khan, Vojtech Nadazdy, Peter Mueller-Buschbaum, Gregory C. Welch, Frederic Laquai
Summary: This study investigates the thermally-induced degradation of organic photovoltaic devices and its effect on their optical properties, photophysics, and morphology. The results show that the degradation limits the open-circuit voltage and fill factor of the devices, while the short-circuit current density is only slightly affected. Energy-resolved electrochemical impedance spectroscopy measurements reveal a higher energy barrier for charge transfer in the degraded samples. Furthermore, the study finds that field-dependent charge generation significantly limits device performance.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Physical
Frank Hartmann, Martin Bitsch, Bart-Jan Niebuur, Marcus Koch, Tobias Kraus, Christian Dietz, Robert W. Stark, Christopher R. Everett, Peter Mueller-Buschbaum, Oliver Janka, Markus Gallei
Summary: This study synthesized a high-molecular-weight polystyrene-b-poly(methyl methacrylate) block copolymer as a soft matrix to fabricate nanocomposites containing magnetic nanoparticles. The influence of different ratios of PMMA-coated FePt nanoparticles on the self-assembled morphology was investigated. Statistical analysis revealed that the particles mainly self-assembled inside the PMMA phase at low particle concentrations, while higher particle ratios had a negative effect on the morphology. The magnetic addressability of the nanoparticles inside the nanocomposite films was confirmed using bimodal magnetic force microscopy.
Article
Materials Science, Multidisciplinary
Manuel A. Reus, Ahmed Krifa, Quinten A. Akkerman, Alexander Biewald, Zehua Xu, David P. Kosbahn, Christian L. Weindl, Jochen Feldmann, Achim Hartschuh, Peter Mueller-Buschbaum
Summary: Printing the active layer of (Cs:FA)PbI3-based nanocrystal solar cells using slot-die coating technique improves the processability and charge transport, and shows a proof-of-concept feasibility for solar cell applications with a median power conversion efficiency of 6.39%.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Engineering, Environmental
Suo Tu, Ting Tian, Apostolos Vagias, Linus F. Huber, Liangzhen Liu, Suzhe Liang, Roland A. Fischer, Sigrid Bernstorff, Peter Mueller-Buschbaum
Summary: This study achieves highly tailorable conduction of PEDOT:PSS by regulating the electronic and ionic contribution using additive engineering. By investigating the charge transport mechanisms and their correlations with morphological alterations, the conductivity evolution of the materials under different humidity conditions is revealed.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Polymer Science
Anna Lena Oechsle, Tobias Schoener, Christina Geiger, Suo Tu, Peixi Wang, Robert Cubitt, Peter Mueller-Buschbaum
Summary: The conductivity properties of the conductive polymer blend PEDOT:PSS are investigated under the influences of ionic liquid treatment and ambient humidity. The results show that the ionic conductivity of the IL-treated PEDOT:PSS films is enhanced by the intake of water molecules, while the electronic conductivity of all PEDOT:PSS films decreases with increasing humidity.
