TY - GEN A1 - Li, Siyang A1 - Lok, Tow-Jie A1 - Ngo, Shi-Han A1 - Xue, Yaoting A1 - Miao, Zhikun A1 - Feng, Tao A1 - Wang, Lei A1 - Wong, Jie-Wei A1 - Low, Jiatee A1 - Lim, Kai-Yi A1 - Woon, Min-Rou A1 - Neffe, Axel T. A1 - Wong, Tuck-Whye A1 - Li, Tiefeng A1 - Yang, Xuxu A1 - Yang, Wei T1 - A water-recyclable, robust, and self-healing sugar-based supramolecular network enabled by Maillard-analogous initialization of polymerization T2 - Materials horizons N2 - Crosslinked functional polymers exhibit exceptional mechanical and chemical properties critical for applications spanning biomedical engineering, advanced adhesives, and self-healing materials. However, challenges in recycling, either due to irreversible crosslinks or, in the case of covalent adaptable networks (CANs), limited solid-state plasticity that typically requires catalysts, significantly restrict sustainability. To address these limitations, we present a novel water-mediated polymerization strategy inspired by the radical-generating mechanism of the Maillard reaction, utilizing maltose as both an initiator and a functional side group in a simple, catalyst-free, aqueous reaction with acrylamide (AAm). This mild, one-pot reaction occurs below 100 °C, forming adaptively functionalized supramolecular networks (AFSNs) that form supramolecular networks through hydrogen bonding and display dynamic imine linkages to the maltose side chains supporting self-healing and re-shaping. These elastomers are characterized by impressive mechanical strength (up to 5 MPa tensile strength), high elongation (up to 1000%), notable fracture energy (36 kJ m−2), robust adhesive performance (up to 4.8 MPa), and rapid self-healing capability at room temperature. Crucially, the elastomer's supramolecular network can be fully and repeatedly dissolved and reprocessed using only water, preserving mechanical integrity without chemical degradation. This sustainable approach provides a practical solution for synthesizing and recycling high-performance crosslinked materials while eliminating environmental hazards, guiding the future development of green polymer chemistry and functional material design. KW - Recycling KW - biobased polymer KW - self-healing KW - Maillard Y1 - 2026 U6 - https://doi.org/10.1039/D5MH01828E SN - 2051-6347 VL - 13 IS - 1 SP - 219 EP - 232 PB - Royal Society of Chemistry (RSC) CY - Cambridge ER - TY - JOUR A1 - Fong, Mun‐Oon A1 - Chen, Xiangping A1 - Wong, Jie‐Wei A1 - Lok, Tow‐Jie A1 - Li, Siyang A1 - Low, Jia Tee A1 - Nordin, Nur Syahirra A1 - Miao, Zhikun A1 - Hu, Qiannan A1 - Neffe, Axel T. A1 - Wong, Tuck‐Whye A1 - Li, Tiefeng A1 - Yang, Wei T1 - Multifunctional Roles of Iron Oxide Nanoparticles in a Reversible Shape‐Memory Composite JF - Advanced Functional Materials N2 - The utilization of functional fillers in the development of composite materials has come a long way since its advent to improve physical, chemical, or mechanical properties of the base material. However, the heterogenous roles contributed by a single type of filler remain uncommon in this field. Here the endowment of various modifications to a 1,8‐octanediol/1,12‐dodecanedioic acid/citric acid (OD/DDA/CA) matrix through the incorporation of iron oxide nanoparticles (IONPs) is reported. Owing to the relaxation and hysteresis loss behaviors of IONPs when exposed to an alternating magnetic field (AMF), the composites demonstrate a magnetothermal response. Similarly, the excitation and relaxation of electrons in IONPs under near‐infrared light (NIR) enable photothermic‐responsiveness. In combination, two findings nurtured an observed shape‐memory effect when the samples are under actuation by these indirect stimuli, where a shape recovery ratio (≥98%) and reversible strain (≤7%) are recorded. Moreover, the catalytic role of IONPs aided transesterification in the covalent network, demonstrated by successful repeated cycles of shape reconfiguration of the samples. This work highlights the prospectives of multifunctional composite fillers in the exploration of bio‐derived composite smart materials. KW - Shape-Memory Polymer KW - Composite KW - Iron Oxide Nanoparticle KW - bio-based Y1 - 2024 U6 - https://doi.org/10.1002/adfm.202418409 SN - 1616-301X PB - Wiley ER - TY - GEN A1 - Bär, Marcus A1 - Schubert, Björn-Arvid A1 - Marsen, Björn A1 - Wilks, Regan G. A1 - Pookpanratana, Sujitra A1 - Blum, Monika A1 - Krause, Stefan A1 - Unold, Thomas A1 - Yang, Wan Li A1 - Weinhardt, Lothar A1 - Heske, Clemens A1 - Schock, Hans-Werner T1 - Cliff-like conduction band offset and KCN-induced recombination barrier enhancement at the CdS/Cu2ZnSnS4 thin-film solar cell heterojunction N2 - The electronic structure of the CdS/Cu2ZnSnS4 (CZTS) heterojunction was investigated by direct and inverse photoemission. The effects of a KCN etch of the CZTS absorber prior to CdS deposition on the band alignment at the respective interface were studied. We find a “cliff”-like conduction band offset at the CdS/CZTS interface independent of absorber pretreatment and a significant etch-induced enhancement of the energetic barrier for charge carrier recombination across the CdS/CZTS interface. KW - kesterite KW - thin-film solar cells KW - energy band alignment Y1 - 2011 ER - TY - GEN A1 - Sullivan, J. T. A1 - Wilks, Regan G. A1 - Winkler, M. T. A1 - Weinhardt, Lothar A1 - Recht, D. A1 - Said, A. J. A1 - Newman, B. K. A1 - Zhang, Y. A1 - Blum, Monika A1 - Krause, S. A1 - Yang, Wan Li A1 - Heske, Clemens A1 - Aziz, M. J. A1 - Bär, Marcus A1 - Buonassisi, T. T1 - Soft x-ray emission spectroscopy studies of the electronic structure of silicon supersaturated with sulfur N2 - We apply soft x-ray emission spectroscopy (XES) to measure the electronic structure of crystalline silicon supersaturated with sulfur (up to 0.7 at. %), a candidate intermediate-band solar cell material. Si L2,3 emission features are observed above the conventional Si valence band maximum, with intensity scaling linearly with S concentration. The lineshape of the S-induced features change across the insulator-to-metal transition, indicating a significant modification of the local electronic structure concurrent with the change in macroscopic electronic behavior. The relationship between the Si L2,3 XES spectral features and the anomalously high sub-band gap infrared absorption is discussed. KW - black silicon KW - solar cells KW - electronic surface structure KW - x-ray emission spectroscopy Y1 - 2011 ER - TY - GEN A1 - Weinhardt, Lothar A1 - Benkert, Andreas A1 - Meyer, Frank A1 - Blum, Monika A1 - Wilks, Regan G. A1 - Yang, Wan Li A1 - Bär, Marcus A1 - Reinert, Friedrich A1 - Heske, Clemens T1 - Nuclear dynamics and spectator effects in resonant inelastic soft x-ray scattering of gas-phase water molecules T2 - The journal of chemical physics N2 - The electronic structure of gas-phase H2O and D2O molecules has been investigated using resonant inelastic soft x-ray scattering (RIXS). We observe spectator shifts for all valence orbitals when exciting into the lowest three absorption resonances. Strong changes of the relative valence orbital emission intensities are found when exciting into the different absorption resonances, which can be related to the angular anisotropy of the RIXS process. Furthermore, excitation into the 4a1 resonance leads to nuclear dynamics on the time scale of the RIXS process; we find evidence for vibrational coupling and molecular dissociation in both, the spectator and the participant emission. Y1 - 2012 SN - 1089-7690 VL - 136 IS - 14 SP - 144311 ER - TY - GEN A1 - Bär, Marcus A1 - Klaer, Joachim A1 - Weinhardt, Lothar A1 - Wilks, Regan G. A1 - Krause, Stefan A1 - Blum, Monika A1 - Yang, Wan Li A1 - Heske, Clemens A1 - Schock, Hans-Werner T1 - Cu 2−x S Surface Phases and Their Impact on the Electronic Structure of CuInS 2 Thin Films – A Hidden Parameter in Solar Cell Optimization T2 - Advanced Energy Materials N2 - The surface properties of CuInS 2 (CIS) thin-fi lm solar cell absorbers are investigated by a combination of electron and soft X-ray spectroscopies. Spatially separated regions of varying colors are observed and identifi ed to be dominated by either CuS or Cu 2 S surface phases. After their removal by KCN etching, the samples cannot be distinguished by eye and the CIS surface is found to be Cu-defi cient in both regions. However, a signifi cantly more pronounced off-stoichiometry in the region initially covered by Cu 2 S can be identifi ed. In this region, the resulting surface band gap is also signifi cantly larger than the E g Surf of the initially CuS-terminated region. Such variations may represent a hidden parameter which, if overlooked, induces irreproducibility and thus prevents systematic optimization efforts. Y1 - 2013 SN - 1614-6840 VL - 3 IS - 6 SP - 777 EP - 781 ER - TY - GEN A1 - Wang, Li A1 - Oehring, Michael A1 - Lorenz, Uwe A1 - Yang, Junjie A1 - Pyczak, Florian T1 - Influence of alloying additions on L1₂ decomposition in γ-γʹ Co-9Al-9W-2X quaternary alloys T2 - Scripta Materialia Y1 - 2018 SN - 1359-6462 VL - 154 SP - 176 EP - 181 ER - TY - GEN A1 - Hua, Pei A1 - Yang, Wenyu A1 - Qi, Xiaochen A1 - Jiang, Shanshan A1 - Xie, Jiaqiang A1 - Guf, Xianyong A1 - Li, Honghao A1 - Zhang, Jin A1 - Krebs, Peter T1 - Evaluating the effect of urban flooding reduction strategies in response to design rainfall and low impact development T2 - Journal of Cleaner Production N2 - Rapid urbanisation and climate change-induced watershed hydrologic alteration have increased urban flooding risks. As a strategy for urban flood control, low impact development (LID) practices focus on promoting the infiltration and detention of stormwater runoff. A modelling-based study was conducted to analyse LID performance in urban flooding reduction. Two-dimensional simulations were conducted to visualise the flood risk under different precipitation scenarios and LID schemes. An integrated evaluation system based on life-cycle cost analysis, the analytic hierarchy process, and regret decision theory were applied to assess the LID performance in multiple aspects. The results indicated that the LID practices achieved runoff control and flood mitigation to some extent, especially under mild rainfall events. According to the integrated evaluation, urban flooding risk could be sufficiently reduced with the LID combination of bioretention, infiltration trenches, and rain barrels in the given area. Y1 - 2020 UR - https://www.sciencedirect.com/science/article/pii/S0959652619333852#! U6 - https://doi.org/10.1016/j.jclepro.2019.118515 SN - 0959-6526 VL - Volume 242 ER - TY - GEN A1 - Li, Yang A1 - Janik, Przemysław A1 - Schwarz, Harald T1 - Aggregated wind power characteristic curves and artificial intelligence for the regional wind power infeed estimation T2 - Electrical Engineering N2 - The wind power generation is highly dependent on current weather conditions. In the course of the energy transition, the generation levels from volatile wind energy are constantly increasing. Accordingly, the prediction of regional wind power generation is a particularly important and challenging task due to the highly distributed installations. This paper presents a study on the role of regional wind power infeed estimation and proposes a multi-aggregated wind power characteristics model based on three scaled Gumbel distribution functions. Multi-levels of wind turbines and their allocation are investigated for the regional aggregated wind power. Relative peak power performance and full load hours are compared for the proposed model and the real measurement obtained from a local distribution system operator. Furthermore, artificial intelligence technologies using neural networks, such as Long Short-Term Memory (LSTM), stacked LSTM and CNN–LSTM, are investigated by using different historical measurement as input data. The results show that the suggested stacked LSTM performs stably and reliably in regional power prediction. KW - Artificial intelligence KW - Aggregated wind power characteristics KW - Regional wind power KW - Engineering Y1 - 2024 U6 - https://doi.org/10.1007/s00202-023-02005-z SN - 0948-7921 SN - 1432-0487 VL - 106 IS - 1 SP - 655 EP - 671 PB - Springer CY - Berlin Heidelberg ER - TY - GEN A1 - Li, Yang A1 - Janik, Przemysław A1 - Pfeiffer, Klaus A1 - Schwarz, Harald T1 - Proposal of a regional cluster model for analysis of electrical power network performance T2 - Archives of Electrical Engineering Y1 - 2022 U6 - https://doi.org/10.24425/aee.2022.141673 SN - 2300-2506 SN - 1427-4221 VL - 71 IS - 3 SP - 601 EP - 613 ER - TY - GEN A1 - Li, Yang A1 - Janik, Przemysław A1 - Pfeiffer, Klaus A1 - Schwarz, Harald T1 - Charging and discharging strategies for clustered regional energy storage system T2 - Power Electronics and Drives Y1 - 2022 U6 - https://doi.org/10.2478/pead-2022-0005 SN - 2543-4292 VL - Vol. 7(42) SP - 56 EP - 67 ER - TY - THES A1 - Li, Yang T1 - Implementation of a network cluster model for large-scale renewable power estimation and effective energy utilization Y1 - 2023 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:co1-opus4-64562 ER -