Article
Materials Science, Multidisciplinary
Rui Qiao, Haoran Xu, Shaonan Chen, Sheng Chen, Hang Luo, Dou Zhang
Summary: Dielectric polymers are crucial in modern electronic and electrical applications due to their easy processing, lightweight, and high breakdown strength. By combining different polymer advantages, the dielectric polymer blending method is a feasible option to address the issue of high ε(r) and breakdown strength in dielectric homopolymers. Experimental results showed the significant impact of n-type semiconductive polymer on the dielectric and energy storage properties of PPDI/PVTC blends.
ACS APPLIED POLYMER MATERIALS
(2021)
Article
Engineering, Chemical
D. Nocita, Z. Wu, L. Hollingbery, C. Kay, S. Morris, B. Haworth, G. Critchlow
Summary: The aim of this study was to improve the surface hydrophilicity of LDPE and PE-b-PMA copolymer blends. By engineering high concentrations of the dispersed PE-b-PMA phase, an increase in surface free energy was successfully achieved.
INTERNATIONAL JOURNAL OF ADHESION AND ADHESIVES
(2021)
Article
Chemistry, Multidisciplinary
Abdul Khayum Mohammed, Ayesha A. Al Khoori, Matthew A. Addicoat, Sabu Varghese, Israa Othman, Maguy Abi Jaoude, Kyriaki Polychronopoulou, Maria Baias, Mohammad Abu Haija, Dinesh Shetty
Summary: Ordered open organic frameworks membranes are ideal candidates for flow-assisted molecular separations. This work introduces a novel concept of functional switchability of three-dimensional covalent organic framework (3D-COF) membranes through a simple solvent-influenced fragmentation method, which enables the membranes to have distinct physicochemical properties.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Engineering, Chemical
Rifan Hardian, Abdulaziz Alammar, Tibor Holtzl, Gyorgy Szekely
Summary: Membrane technologies have shown promise as an energy-efficient alternative for separation processes in various industries. This study focuses on the fabrication of oil and solvent-resistant nanofiltration membranes using cellulose and chitosan blends. The membranes exhibited outstanding separation performance and chemical stability, even in harsh solvents. By adjusting the cellulose-chitosan ratio, the molecular sieving properties of the membranes could be fine-tuned. The membranes also showed biodegradation potential, contributing to the sustainable lifecycle of membranes.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Chemistry, Physical
Haitao Liao, Xuejiao Tang, Yalun Zhao, Li Chen, Chao Weng, Ping Shen
Summary: Subtle modification of the electron-withdrawing end group of small-molecule acceptors (SMAs) plays a crucial role in regulating their structure, optoelectronic properties, and device performance. In this study, we developed two SMAs based on indacenodithieno[3,2-b]thiophene by employing hybrid dihalogenated 1,1-dicyanomethylene-3-indanone as end groups. The effects of hybrid dihalogenated end groups on solubility, photoelectrochemical properties, morphology, and device performance were comprehensively investigated. The results showed that hybrid dihalogenation improved the absorption ability and elevated the lowest unoccupied molecular orbitals of the corresponding SMAs, leading to increased short-circuit current density and open-circuit voltage. Furthermore, the solubility of the SMAs in nonhalogenated solvents was improved, enabling the fabrication of devices with environmentally friendly solvents. Polymer solar cells based on these SMAs demonstrated enhanced power conversion efficiency compared to their counterparts, highlighting the feasibility of using hybrid dihalogenation to improve the performance of PSCs fabricated with eco-friendly solvents and additives.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Polymer Science
Tianhang Zhou, Jurek Schneider, Zhenghao Wu, Florian Mueller-Plathe
Summary: Our study reveals that in strongly incompatible systems, regular multiblock copolymers show better compatibilization performance compared to symmetric diblock copolymers at the same areal concentration. Additionally, for unsymmetric diblock copolymers in strongly incompatible systems, the length of the shortest block is a more important determinant for the compatibilization efficiency than the ratio of block lengths.
Article
Polymer Science
Chaoyue Zhao, Hui Huang, Lihong Wang, Guoping Zhang, Guanyu Lu, Han Yu, Guanghao Lu, Yulai Han, Mingxia Qiu, Shunpu Li, Guangye Zhang
Summary: In this study, the sequential processing (SqP) method was applied to improve the electron mobility and charge carrier transport balance in all-polymer solar cells (all-PSCs) based on polymerized small-molecule acceptors (PSMA). Through film-depth-dependent light absorption spectroscopy, the absorption and exciton generation rate in the device's vertical direction were analyzed, and the effects of increased electron mobility on device performance were discussed.
Article
Chemistry, Multidisciplinary
Guowei Deng, Hongyu Chen, Jiexue Wang, Kexiang Chen, Lu Li, Shilu Zhang, Kang Sun, Zhonghui Li, Jun Liu
Summary: This study developed a series of PTT agents based on D-pi-A-type chromophores with different electron-donating groups to optimize their photothermal performance. PTA-2-cRGD exhibited superior photothermal properties and complete tumor eradication without recurrence in vivo. The improved photothermal performance of PTA-2-cRGD also enhanced the photoacoustic signal, which was utilized for tumor diagnosis in vivo.
MATERIALS CHEMISTRY FRONTIERS
(2022)
Article
Polymer Science
Dongle Liu, Zicheng Ding, Yin Wu, Shengzhong Frank Liu, Yanchun Han, Kui Zhao
Summary: The study systematically examined the influences of different solvents on the blend of conjugated polymers and elastomers in terms of film morphology, phase purity and phase separation, as well as mechanical and electrical properties. By gaining insights into molecular aggregation and thin-film morphology, it provides valuable information for the development of high-performance stretchable electronics.
Article
Chemistry, Physical
Jingwei Xue, Hafiz Bilal Naveed, Heng Zhao, Baojun Lin, Yilin Wang, Qinglian Zhu, Baohua Wu, Zhaozhao Bi, Xiaobo Zhou, Chao Zhao, Ke Zhou, Wei Ma
Summary: This study investigates the influence of component miscibility and film formation kinetics on film morphology during processing with different solvents. It is found that good miscibility helps maintain the desired morphology, while poor miscibility leads to phase separation and decreased average power conversion efficiency.
JOURNAL OF MATERIALS CHEMISTRY A
(2022)
Article
Polymer Science
Xiaoxue Wu, Tiantian Song, Zizhen Wei, Lei Shen, Hanqiu Jiang, Yubin Ke, Chunyong He, Hua Yang, Weichao Shi
Summary: Studies have shown that even a small amount of lithium salt can significantly enhance the liquid-liquid phase separation of PEO/PS blends, with the effect of electrostatic interaction increasing with temperature.
Article
Chemistry, Physical
Chaoyue Zhao, Ruijie Ma, Yiwen Hou, Liangxiang Zhu, Xinhui Zou, Wenzhao Xiong, Huawei Hu, Lihong Wang, Han Yu, Yajie Wang, Guoping Zhang, Jicheng Yi, Lu Chen, Dan Wu, Tao Yang, Gang Li, Mingxia Qiu, He Yan, Shunpu Li, Guangye Zhang
Summary: All-polymer solar cells (all-PSCs) with superior stability have potential for industrial production. The efficiency of all-PSCs has been improved by using polymerized small molecule acceptor (PSMA), but high efficiency often requires the use of volatile solvent chloroform (CF). This study explores the use of sequential processing (SqP) with toluene as the solvent to improve electron mobility and stability of all-PSCs, achieving a record efficiency of 18.1% for all-PSCs prepared using non-halogen solvents.
ADVANCED ENERGY MATERIALS
(2023)
Review
Polymer Science
Aref Abbasi Moud
Summary: In this brief overview, we discussed the applications of confocal laser scanning microscopy and Raman imaging spectroscopy in studying polymer blends. The results show that these techniques can be used to evaluate various components and properties of polymer mixes.
Article
Nanoscience & Nanotechnology
Dusan Mrdenovic, Daniel Abbott, Victor Mougel, Weitao Su, Naresh Kumar, Renato Zenobi
Summary: This article introduces a sensitive nanoanalytical method, combining TERS, AFM, confocal Raman spectroscopy, and XPS, to determine the phase separation in polymer blend films. The study reveals the vertical phase separation at the top ca. 20 nm of the blend surface and lateral phase separation in the bulk.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Physical
Harsh D. Patel, Naveen K. Acharya
Summary: In this study, polymer blend membranes with graphene oxide (GO) were prepared by the solution cast method and their structure and properties were characterized. The experimental results showed that the addition of GO nanofillers could enhance the hydrogen gas permeability and selectivity of the blend membranes, indicating their potential application in hydrogen purification.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Review
Engineering, Electrical & Electronic
Ziyang Zhang, Kyeiwaa Asare-Yeboah, Sheng Bi, Zhengran He
Summary: This article reviews the challenges of crystal misorientation and mobility variation in solution-processed organic semiconductors and discusses how poly(alpha-methyl styrene) (P alpha MS) can be used as an additive to improve crystallization and charge transport in organic electronic devices. The study highlights the versatility of P alpha MS in enhancing the performance of various organic semiconductors.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Materials Science, Multidisciplinary
Zhengran He, Kyeiwaa Asare-Yeboah, Ziyang Zhang, Sheng Bi
Summary: Organic electronics is a rapidly developing field, and this article reviews different methods for controlling organic semiconductor crystallization, thin-film morphology, and crystal orientations. By utilizing external force-based, additive-based, and binary solvent-based techniques, the performance of organic semiconductors can be effectively improved.
ORGANIC ELECTRONICS
(2022)
Article
Materials Science, Multidisciplinary
Mariappan Parans Paranthaman, Nathan Peroutka-Bigus, Kristina R. Larsen, Kruttika S. Phadke, Tina Summers, Merlin Theodore, Dale K. Hensley, Alan M. Levine, Richard J. Lee, Bryan H. Bellaire
Summary: The application of antimicrobial coatings to masks and respirators can reduce the transmission of SARS-CoV-2 and make them suitable for repeated use.
MATERIALS TODAY ADVANCES
(2022)
Review
Materials Science, Multidisciplinary
Zhengran He, Ziyang Zhang, Kyeiwaa Asare-Yeboah, Sheng Bi
Summary: Recent studies have shown significant advancements in charge carrier mobilities in solution processed, small molecular organic semiconductors, paving the way for their promising applications in organic electronic devices. However, the in-solution crystallization of these semiconductors poses challenges such as crystal misorientation, grain boundary, and mobility variation. This article discusses the effects of these issues on charge transport and explores the use of solvent exchange methods to mitigate these challenges, highlighting the benefits in optimizing the semiconductor morphology. The study demonstrates that solvent exchange-based crystallization methods can effectively modulate supramolecular aggregation, improve semiconductor alignment, and enhance charge transport, offering insights for high performance organic electronic applications.
ELECTRONIC MATERIALS LETTERS
(2022)
Article
Chemistry, Physical
Sheng Bi, Wenlin Jin, Xu Han, Xuguang Cao, Zhengran He, Kyeiwaa Asare-Yeboah, Chengming Jiang
Summary: Flexible pressure sensitive electronic skins have significant potential for motion detection and medical health applications. In this study, an integrated piezo electrochromic based tactile sensing display (PETSD) was developed. It can accurately track the movement of a finger or a pen tip in real time and has a low response time and high color contrast. The PETSD system shows remarkable durability and cycle stability, making it suitable for various applications.
Article
Chemistry, Multidisciplinary
Li Sun, Tianyu Li, Jiajian Zhou, Wenhao Li, Zhongming Wu, Ruikun Niu, Jinxiang Cheng, Kyeiwaa Asare-Yeboah, Zhengran He
Summary: In this paper, a binary solvent method using green solvents was demonstrated to control crystal alignment and charge transport in organic semiconductors. The toluene/n-amyl acetate binary solvent showed significant improvement in grain width and orientation of 6,13-bis(triisopropylsilylethynyl) pentacene crystals. UV-visible spectroscopy and X-ray diffraction confirmed enhanced intrachain interactions, charge transport, and film crystallinity. Thin film transistors were successfully fabricated to assess the charge transport properties. This study highlights the potential of the binary green solvent method in advancing organic electronic applications.
Article
Materials Science, Multidisciplinary
Sheng Bi, Xu Han, Qiangqiang Chen, Buhan Gao, Luhua Chen, Zhengran He, Chengming Jiang
Summary: Flexible self-power triboelectric nanogenerators (TENGs) based on porous wood have ultralarge folding curvature and extreme high stability, making them ideal for real-time body motion monitoring. The output power of the porous wood-based TENG is more than 200% higher than that of natural wood, and it has rapid degradation and reliable repeatability and stability.
ADVANCED MATERIALS TECHNOLOGIES
(2023)
Article
Chemistry, Physical
Xu Han, Kyeiwaa Asare-Yeboah, Zhengran He, Chengming Jiang, Sheng Bi
Summary: As high-voltage output and fast response devices, triboelectric nanogenerators (TENGs) are widely used for sensors with fast and high-sensitivity performance. The contact charging principle of TENGs is further discussed based on mosaic charging and residual charge theories. The experimental results show that wavy TENGs have excellent output properties compared to those of TENGs with flat structures, such as longer charging and discharging times and more complex waveforms. Our work provides new prospects for application in various sensors of interactive wearable systems, intelligent robots, and optoelectronic devices based on TENGs.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Biochemical Research Methods
He Zhao, Kailash Shrestha, Dale K. Hensley, B. Jill Venton
Summary: Carbon nanospikes (CNSs) are a new nanomaterial that enhances the sensitivity for dopamine detection. In this study, CNS-modified electrodes (CNSMEs) were evaluated for the detection of adenosine, hydrogen peroxide ( H2O2), and histamine. The results showed that CNSMEs had higher signals compared to conventional electrodes (CFMEs), with increased sensitivity for adenosine (4.8 times), H2O2 (1.5 times), and histamine (2 times). CNSMEs also promoted the formation of secondary products for adenosine and histamine, allowing differentiation from analytes with similar oxidation potentials. CNSs selectively enhanced the sensitivity for adenosine and histamine compared to H2O2. The use of CNSMEs in brain slices and tissue measurements showed high selectivity and low fouling.
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
(2023)
Article
Engineering, Electrical & Electronic
Yuan Qin, Ming Xiao, Ruizhe Zhang, Qingyun Xie, Tomas Palacios, Boyan Wang, Yunwei Ma, Ivan Kravchenko, Dayrl P. Briggs, Dale K. Hensley, Bernadeta R. Srijanto, Yuhao Zhang
Summary: This work presents the fabrication of quasi-vertical GaN Schottky barrier diodes (SBDs) on a 6-inch Si substrate with a record-breaking breakdown voltage (BV) of over 1 kV. The novel use of a deep mesa in quasi-vertical devices allows for a self-aligned edge termination, and the mesa sidewall is covered by p-type nickel oxide (NiO) to reduce the surface field. The device exhibits a parallel-plane junction electric field of 2.8 MV/cm, along with low turn-on voltage and specific on-resistance. Additionally, it demonstrates excellent overvoltage robustness under continuous stress.
IEEE ELECTRON DEVICE LETTERS
(2023)
Article
Chemistry, Physical
Xu Han, Kyeiwaa Asare-Yeboah, Zhengran He, Chengming Jiang, Sheng Bi
Summary: Triboelectric nanogenerators (TENGs) are widely used as high-voltage output and fast response devices in sensors with fast and high-sensitivity performance. The contact charging principle of TENGs is further discussed based on mosaic charging and residual charge theories. By researching the waveform in depth, our work will provide new prospects for application in various sensors of interactive wearable systems, intelligent robots, and optoelectronic devices based on TENGs.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Review
Materials Science, Multidisciplinary
Zhengran He, Ziyang Zhang, Kyeiwaa Asare-Yeboah, Sheng Bi
Summary: Solution processed, flexible electronics has gained significant research attention in recent years for its promising applications in semiconductor device fabrication. Binary solvents play a crucial role in determining the crystallization and electrical performance of organic semiconductors. This article provides a comprehensive review on the effect of engineering binary solvents on the crystallization process and highlights the potential of solvent optimization for improving charge transport in flexible electronic devices.
MATERIALS ADVANCES
(2023)
Article
Multidisciplinary Sciences
Zening Liu, Jong K. Keum, Tianyu Li, Jihua Chen, Kunlun Hong, Yangyang Wang, Bobby G. Sumpter, Rigoberto Advincula, Rajeev Kumar
Summary: In this study, the conformational hypotheses of polyzwitterions (PZs) in dilute aqueous solutions are tested by investigating the effects of added salt on the gyration and hydrodynamic radii of poly(sulfobetaine methacrylate). The results reveal the importance of salt in affecting the net charge and conformations of PZs, with the observations of antipolyelectrolyte and polyelectrolyte effects.
Proceedings Paper
Engineering, Electrical & Electronic
Xinyun Yan, Shang Shi, Xiaohu Xu, Zhengran He, Xiaofeng Zhou, Chishe Wang, Zhiyi Lu
Summary: With the development of deep learning, computer vision has been widely used in road damage detection. This paper introduces an automatic detection system for road damages based on the YOLOv5s algorithm, and achieves good detection results through experimental tests on the FocusCrack dataset.
2022 IEEE 96TH VEHICULAR TECHNOLOGY CONFERENCE (VTC2022-FALL)
(2022)
Proceedings Paper
Engineering, Electrical & Electronic
Yunxiao Shi, Xixi Zhang, Zhengran He, Jie Yang
Summary: The application of deep learning in network intrusion detection has shown remarkable results, particularly in malicious traffic classification tasks. However, designing the model architecture requires professional knowledge and effort. This paper introduces a model that utilizes DARTS to search for optimal architecture in the field of malicious traffic classification. Simulation results demonstrate that this method achieves optimal classification accuracy with lower parameters, without manual architecture engineering.
2022 IEEE 96TH VEHICULAR TECHNOLOGY CONFERENCE (VTC2022-FALL)
(2022)
