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Organic X-Ray Image Sensors Using a Medium Bandgap Polymer Donor with Low Dark Current

Energy & Environmental materials 2024年第6期7卷 230-237页

作者： Jong-Woon Ha Seung Hun Eom Bo Kyung Cha Seyeong Song Hyeong Ju Eun Jong H.Kim Jong Mok Park BongSoo Kim Byoungwook Park Seo-Jin Ko Sung Cheol Yoon Changjin Lee In Hwan Jung Do-Hoon Hwang Department of Chemistry Chemistry Institute for Functional MaterialsPusan National UniversityBusan 46241Korea Division of Advanced Energy Materials Research Center Korea Research Institute of Chemical Technology(KRICT)Daejeon 34114Korea Electro-Medical Device Research Center Korea Electrotechnology Research Institute(KERI)Ansan 15588Korea Graduate School of Carbon Neutrality School of Energy and Chemical EngineeringUlsan National Institute of Science and Technology(UNIST)Ulsan 44919Korea Department of Molecular Science and Technology Ajou UniversitySuwon 16449Korea Research Center for Advanced Specialty Chemicals Korea Research Institute of Chemical TechnologyUlsan 44412Korea Department of Chemistry Ulsan National Institute of Science and Technology(UNIST)Ulsan 44919Korea Department of Organic and Nano Engineering Human-Tech Convergence ProgramHanyang University222 Wangsimni-roSeongdong-guSeoul 04763Korea

The development of portable X-ray detectors is necessary for diagnosing fractures in unconscious patients in emergency ***,this is quite challenging because of the heavy weight of the scintillator and silicon *** weight and thickness of X-ray detectors can be reduced by replacing the silicon layer with an organic *** study presents a novel bithienopyrroledione-based polymer donor that exhibits excellent photodetection properties even in a thick photoactive layer(~700 nm),owing to the symmetric backbone and highly soluble molecular structure of *** ability of bithienopyrroledione-based polymer donor to strongly suppress the dark current density(Jd~10−10 A cm^(−2))at a negative bias(−2.0 V)while maintaining high responsivity(R=0.29 A W−1)even at a thickness of 700 nm results in a maximum shot-noise-limited specific detectivity of D_(sh)^(*)=2.18×10^(13)Jones in the organic *** organic photodetectors are developed by slot-die coating for use in X-ray detectors,which exhibit D_(sh)^(*)=2.73×10^(12)Jones with clear rising(0.26 s)and falling(0.29 s)response times upon X-ray *** reliability is also proven by linear response of the X-ray detector,and the X-ray detection limit is 3 mA.

关键词： low dark current low detection limit organic photodetector printable X-ray

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Alkyl-thiophene-alkyl linkers to construct double-cable conjugated polymers for single-component organic solar cells

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Chinese Chemical Letters 2024年第1期35卷 542-546页

作者： Wenbin Lai Safakath Karuthedath Chengyi Xiao Lei Meng Frédéric Laquai Weiwei Li Yongfang Li Beijing National Laboratory for Molecular Sciences Key Laboratory of Organic SolidsInstitute of ChemistryChinese Academy of SciencesBeijing 100190China Beijing Advanced Innovation Center for Soft Matter Science and Engineering&State Key Laboratory of Organic-Inorganic Composites Beijing University of Chemical TechnologyBeijing 100029China King Abdullah University of Science and Technology(KAUST) KAUST Solar Center(KSC)Physical Sciences and Engineering Division(PSE)Material Science and Engineering Program(MSE)Thuwal 23955-6900Kingdom of Saudi Arabia University of Chinese Academy of Sciences Beijing 100049China Institute of Materials Research Tsinghua Shenzhen International Graduate SchoolTsinghua UniversityShenzhen 518055China

In this work,semirigid linkers of the alkyl-thiophene-alkyl structure are developed to construct double-cable *** alkyl units,propyl(C3H6),hexyl(C6H12),and dodecyl(C12H24),are applied as semirigid linkers,yielding three double-cable polymers:PBC6-T,PBC12-T,and PBC24-T,***12-T which uses C6H12-thiophene-C6H12 linkers is found to exhibit the best device efficiency of 5.56%,while PBC6-T and PBC24-T with shorter or longer linkers yield device efficiencies of only 2.65%and 1.09%in single-component organic solar cells(SCOSCs).Further studies reveal that PBC12-T exhibits higher crystallinity and improved charge transport,resulting in better *** work provides an approach to construct double-cable conjugated polymers with long alkyl linkers,and it shows the importance of the linker length for the photovoltaic performance of SCOSCs.

关键词： Double-cable conjugated polymer Single-component organic solar cell Crystallinity Semirigid linkers Alkyl-thiophene-alkyl

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Cytometry in the Short-Wave Infrared

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ACS Nano 2024年第28期18卷 18534-18547页

作者： Liu, Te-I Wang, Jhih-Shan Nguyen, Ai-Phuong Raabe, Marco Quiroz Reyes, Carlos Jose Lin, Chih-Hsin Lin, Ching-Wei Institute of Atomic and Molecular Sciences Academia Sinica Taipei City106319 Taiwan Department of Materials Science and Engineering National Taiwan University Taipei City106319 Taiwan Department of Physics University of Stuttgart Stuttgart70174 Germany Department of Chemistry National Tsing Hua University Hsinchu300044 Taiwan International Ph.D. Program in Biomedical Engineering Taipei Medical University New Taipei City235603 Taiwan Graduate Institute of Nanomedicine and Medical Engineering Taipei Medical University New Taipei City235603 Taiwan

Cytometry plays a crucial role in characterizing cell properties, but its restricted optical window (400-850 nm) limits the number of stained fluorophores that can be detected simultaneously and hampers the study and utilization of short-wave infrared (SWIR;900-1700 nm) fluorophores in cells. Here we introduce two SWIR-based methods to address these limitations: SWIR flow cytometry and SWIR image cytometry. We develop a quantification protocol for deducing cellular fluorophore mass. Both systems achieve a limit of detection of ∼0.1 fg cell-1 within a 30 min experimental time frame, using individualized, high-purity (6,5) single-wall carbon nanotubes as a model fluorophore and macrophage-like RAW264.7 as a model cell line. This high-sensitivity feature reveals that low-dose (6,5) serves as an antioxidant, and cell morphology and oxidative stress dose-dependently correlate with (6,5) uptake. Our SWIR cytometry holds immediate applicability for existing SWIR fluorophores and offers a solution to the issue of spectral overlapping in conventional cytometry. © 2024 The Authors. Published by American Chemical Society.

关键词： Oxygen

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Approach for enhancing sensitivity of tin-oxo cluster resist for high NA extreme UV lithography 41

Approach for enhancing sensitivity of tin-oxo cluster resist...

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Advances in Patterning materials and Processes XLI 2024

作者： Ku, Yejin Kim, Gayoung Kim, Min Seung Lee, Jin-Kyun Kim, Jiho Park, Byeong-Gyu Lee, Sangsul Lee, Seohyeon Jung, Byung Jun Lee, Changhyeon Kim, Hyunseok Hur, Su-Mi Koh, Chawon Nishi, Tsunehiro Kim, Hyun-Woo Program in Environment and Polymer Engineering Inha University Incheon22212 Korea Republic of Department of Polymer Science and Engineering Inha University Incheon22212 Korea Republic of Pohang Accelerator Laboratory Postech Pohang37673 Korea Republic of Department of Materials Science and Engineering University of Seoul Seoul02504 Korea Republic of Department of Polymer Engineering Graduate School Chonnam National University Gwangju61186 Korea Republic of School of Polymer Science and Engineering Chonnam National University Gwangju61186 Korea Republic of Department of Materials Science and Engineering Yonsei University Seoul03722 Korea Republic of Samsung Electronics Co. Ltd. Semiconductor R&d Center Gyeonggi-do 18448 Korea Republic of

ISBN: (纸本)9781510672208

High numerical aperture (NA) EUV lithography is considered as the most-promising candidate for next generation lithography protocol that will play a crucial role in meeting the demand on the enhanced semiconductor performance and productivity. While this technology enables the fabrication of sub-10 nm patterns, the increased NA has posed challenges, such as reduced depth of focus and narrower process margins. To overcome these hurdles, it is essential to apply thinner resist films while ensuring that the resulting small patterns maintain sufficient physical and chemical durability. Moreover, considering that thinner films absorb fewer photons, the resist molecular structure should be designed to compensate sensitivity burdens. Here, an approach has been proposed to enhance sensitivity by accelerating the solubility change of a well-known tinbased nanocluster resist. To accomplish this goal, it is important to increase not only the number of secondary electrons but also reaction sites and promote radical-based chemical reactions. We aimed at experimentally validating this concept by utilizing elements with high EUV absorbance and highly reactive functional groups with tin radicals. As a model resist, we chose a tin-oxo cage material consisting of a divalent cation containing 12 tin atoms and two counter anions. Our findings indicate that the introduction of unsaturated groups capable of building bridging bonds with radicals leads to fast solubility change at a lower exposure dose, thus enhancing sensitivity. This research offers a promising direction for the development of resists tailored for High NA EUV lithography. © COPYRIGHT SPIE. Downloading of the abstract is permitted for personal use only.

关键词： Tin

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Study of Machine Learning Techniques for Damage Identification in a Beam 10th

Study of Machine Learning Techniques for Damage Identifica...

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10th International Conference on Wave Mechanics and Vibrations, WMVC 2022

作者： da Silva Coelho, Jefferson de Sousa, Amanda Aryda Silva Rodrigues Machado, Marcela Rodrigues Dutkiewicz, Maciej Department of Mechanical Engineering University of Brasília Campus Universitário Darcy Ribeiro Faculdade de Tecnologia - Asa Norte DF Brasília Brazil Post-Graduate Program - Integrity of Engineering Materials University of Brasília Campus Universitário Darcy Ribeiro Faculdade de Tecnologia - Asa Norte DF Brasília70910-900 Brazil Faculty of Civil Environmental Engineering and Architecture University of Science and Technology Bydgoszcz85-796 Poland

ISBN: (纸本)9783031157578

Damage is defined as any change to the material, geometry or boundary condition that can modify the structure’s properties or response. In the past, damage identification was performed through periodical inspection, non-destructive testing/non-destructive evaluation, or visual observation. Structural health monitoring (SHM) has emerged to transition from offline damage identification to near real-time and online damage assessment. Hence, SHM is a damage detection strategy to monitor a structure for a period using a series of continuous measurement devices, which then collect the system’s characteristics and subsequently perform statistical analysis to assess the current circumstances and health of the structure. One of the first steps for the study of SHM is damage detection followed by monitoring. Machine Learning (ML) techniques can be used to develop viable algorithms to make potential predictions. ML algorithms are therefore providing the tools needed to enhance the capabilities of SHM systems and provide intelligent solutions to past challenges. Preliminary studies have reviewed that the extension of ML into SHM has dramatically increased the system’s capabilities, providing innovative solutions to different research challenges. This work conducts a study of the use of ML to identify damage in a beam and discuss the challenge of usage, performance and implementation of each technique. © 2023, The Author(s), under exclusive license to Springer Nature Switzerland AG.

关键词： Decision trees

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Unravelling the strong interplay for interfacial magnetic switching in metal-organic-based spintronics

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Journal of materials Chemistry C 2024年第11期12卷 3931-3942页

作者： Chen, Wan-Ting Yu, Li-Chung Lin, Jiu-Hua Cheng, Su Ling Shiu, Hung Wei Lai, Yu-Ling Chu, Ying-Hao Chin, Yi-Ying Wang, Jeng-Han Hsu, Yao-Jane National Synchrotron Radiation Research Center Hsinchu30076 Taiwan Graduate Program for Science and Technology of Accelerator Light Sources National Yang Ming Chiao Tung University Hsinchu30076 Taiwan Department of Materials Science and Engineering National Tsing Hua University Hsinchu30013 Taiwan Department of Chemistry National Taiwan Normal University Taipei11677 Taiwan Department of Photonics National Cheng Kung University Tainan70101 Taiwan Department of Physics National Chung Cheng University Chiayi62102 Taiwan

Organic semiconductors are promising building blocks for multifunctional spintronics. The spinterface plays a key role in affecting the magnetic properties of the performance of spin-based devices. Herein, we reveal the strong interfacial interplay affecting the magnetic switching at the interface of the synthetic paramagnetic tris(8-hydroxyquinoline)iron(iii) (Feq3) layer on the ferromagnetic surface. In combination with synchrotron-based analysis and density functional theory (DFT) calculations, we observed that the robust magnetic interactions of the Co/Feq3 system were strongly influenced by the interfacial reaction between Co and Feq3. As the charge transferred from the contacted Co to Feq3, the central iron was reduced from Fe(iii) to Fe(ii) and hybridized with the 8-hydroxyquinoline, causing spin polarization at the interface. The reduced central Fe(ii) exhibited apparent ferromagnetic ordering after contact with the ferromagnetic Co substrate. With increasing the Feq3 layer thickness, the central Fe reverted to its original Fe(iii) state, resulting in the disappearance of ferromagnetic ordering. The thickness dependence of the Feq3 layer on the magnetic response could be used to tune the spinterface properties and thus the interfacial magnetic interplay. These findings reveal the effect of the strong interfacial redox on the spinterface and open up a promising approach for the use of metal-organic materials in oragnic spintronic devices. © 2024 The Royal Society of Chemistry.

关键词： Organometallics

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On-Chip Perovskite Nanocrystal Laser Integrated with Long-Range Surface Plasmon Polariton Waveguide by Etching-Free Lithographic Patterning

On-Chip Perovskite Nanocrystal Laser Integrated with Long-Ra...

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2022 JSAP-Optica Joint Symposia, JSAP 2022

作者： Lee, Yang-Chun Lin, Hsin-Chang Lin, Cheng-Chieh Ho, Ya-Lun Xing, Di Chen, Mu-Hsin Lin, Bo-Wei Chen, Li-Yin Chen, Chun-Wei Delaunay, Jean-Jacques School of Engineering The University of Tokyo Japan Department of Photonics National Sun Yat-sen University Taiwan International Graduate Program of Molecular Science and Technology National Taiwan University Academia Sinica Taiwan Department of Materials Science and Engineering National Taiwan University Taiwan Molecular Science and Technology Program Taiwan International Graduate Program Academia Sinica Taiwan Department of Photonics National Yang Ming Chiao Tung University Taiwan Center of Atomic Initiative for New Materials National Taiwan University Taiwan

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Infrared Spectra Prediction for Diazo Groups Utilizing a Machine Learning Approach with Structural Attention Mechanism

arXiv

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arXiv 2024年

作者： Liu, Chengchun Mo, Fanyang School of Materials Science and Engineering Peking University Beijing100871 China -Preferred Program Peking University Shenzhen Graduate School Shenzhen518055 China

Infrared (IR) spectroscopy is a pivotal technique in chemical research for elucidating molecular structures and dynamics through vibrational and rotational transitions. However, the intricate molecular fingerprints characterized by unique vibrational and rotational patterns present substantial analytical challenges. Here, we present a machine learning approach employing a Structural Attention Mechanism tailored to enhance the prediction and interpretation of infrared spectra, particularly for diazo compounds. Our model distinguishes itself by honing in on chemical information proximal to functional groups, thereby significantly bolstering the accuracy, robustness, and interpretability of spectral predictions. This method not only demystifies the correlations between infrared spectral features and molecular structures but also offers a scalable and efficient paradigm for dissecting complex molecular interactions. Copyright © 2024, The Authors. All rights reserved.

关键词： Molecular structure

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In-plane Wilson loop for measurement of quantized non-Abelian Berry flux

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Physical Review B 2024年第19期109卷 195149-195149页

作者： Alexander C. Tyner Shouvik Sur Qunfei Zhou Danilo Puggioni Pierre Darancet James M. Rondinelli Pallab Goswami Graduate Program in Applied Physics Northwestern University Evanston Illinois 60208 USA Department of Physics and Astronomy Northwestern University Evanston Illinois 60208 USA Materials Research Science and Engineering Center Northwestern University Evanston Illinois 60208 USA Center for Nanoscale Materials Argonne National Laboratory Argonne Illinois 60439 USA Department of Materials Science and Engineering Northwestern University Evanston Illinois 60208 USA Northwestern Argonne Institute for Science and Engineering Evanston Illinois 60208 USA

Band topology of anomalous quantum Hall insulators can be precisely addressed by computing the Chern numbers of constituent nondegenerate bands, describing the presence of quantized, Abelian Berry flux through the two-dimensional Brillouin zone. Can Berry flux be captured for the SU(2) Berry connection of two-fold degenerate bands in spinful materials preserving space-inversion (P) and time-reversal (T) symmetries without detailed knowledge of underlying basis? We address this question by investigating the correspondence between a non-Abelian generalization of Stokes' theorem and the manifestly gauge-invariant eigenvalues of Wilson loops computed along in-plane contours which preserve the underlying crystalline symmetry. The importance of this correspondence is elucidated by performing natural number resolved classification of ab initio band structures of three-dimensional, Dirac materials. Our work underscores how identification of quantized Berry flux, both Abelian and non-Abelian, offers a unified framework for addressing first-order and higher-order topology of insulators and semimetals.

关键词： Electronic structure of atoms & molecules First-principles calculations Topological insulators

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Localization of a Crack in Moving Cylindrical Ferromagnetic Rods by Measuring the Fourier Coefficients of the Leakage Magnetic Flux

Localization of a Crack in Moving Cylindrical Ferromagnetic ...

引用

Magnetic Conference - Short Papers (INTERMAG Short Papers), IEEE International

作者： Kanta Shiku Masafumi Kuromizu Yuji Gotoh Takaaki Nara Graduate School of Information Science and Technology The University of Tokyo bunkyo-ku Japan Division of Materials Science and Production Engineering Graduate School of Engineering Oita University Oita Japan Intelligent Mechanical Systems Program Faculty of Science and Technology Oita University Oita Japan

ISBN: (数字)9798350362213

ISBN: (纸本)9798350362220

Electromagnetic nondestructive inspection for high-speed moving ferromagnetic materials is necessary for manufacturing efficiency. In this paper, we present a novel leakage magnetic flux (LMF) method to estimate the crack position in a moving cylindrical ferromagnetic rod. The method directly measures the first-order Fourier coefficients of the LMF moving with the crack by using only two coils with DC excitation. The location of a crack is estimated by the proposed method, as demonstrated for an S45C cylindrical rod.

关键词： Location awareness Coils Magnetic flux Inspection Ferromagnetic materials Manufacturing Electromagnetics

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