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arXiv 2024年

作者： Kim, Dasom Hou, Jin Lee, Geon Agrawal, Ayush Kim, Sunghwan Zhang, Hao Bao, Di Baydin, Andrey Wu, Wenjing Tay, Fuyang Huang, Shengxi Chia, Elbert E.M. Kim, Dai-Sik Seo, Minah Mohite, Aditya D. Hagenmüller, David Kono, Junichiro Applied Physics Graduate Program Smalley–Curl Institute Rice University HoustonTX77005 United States Department of Electrical and Computer Engineering Rice University HoustonTX77005 United States Department of Materials Science and NanoEngineering Rice University HoustonTX77005 United States Sensor System Research Center Korea Institute of Science and Technology Seoul02792 Korea Republic of Department of Physics and Astronomy Seoul National University Seoul08826 Korea Republic of Department of Chemical and Biomolecular Engineering Rice University Houston77005 United States Ulsan44919 Korea Republic of Division of Physics and Applied Physics School of Physical and Mathematical Sciences Nanyang Technological University Singapore637371 Singapore Smalley–Curl Institute Rice University HoustonTX77005 United States Rice Advanced Materials Institute Rice University HoustonTX77005 United States KU–KIST Graduate School of Converging Science and Technology Korea University Seoul02841 Korea Republic of Université de Strasbourg CNRS Strasbourg67200 France Department of Physics and Astronomy Rice University HoustonTX77005 United States

Phonons, or vibrational quanta, are behind some of the most fundamental physical phenomena in solids, including superconductivity, Raman processes, and broken-symmetry phases. It is therefore of fundamental importance to find ways to harness phonons for controlling these phenomena and developing novel quantum technologies. However, the majority of current phonon control techniques rely on the use of intense external driving fields or strong anharmonicities, which restricts their range of applications. Here, we present a scheme for controlling the intensity fluctuations in phonon emission at room temperature based on multimode ultrastrong light–matter coupling. The multimode ultrastrong coupling regime is achieved by coupling two optical phonon modes in lead halide perovskites to an array of nanoslots, which operates as a single-mode cavity. The extremely small mode volume of the nanoslots enables unprecedented coupling strengths in a cavity phonon-polariton system. In the far-detuned, low-cavity-frequency regime, we demonstrate that the nanoslot resonator mediates an effective coupling between the phonon modes, resulting in superthermal phonon bunching in thermal equilibrium, both within the same mode and between different modes. Experimental results are in good agreement with a multimode Hopfield model. Our work paves the way for the tailoring of phonons to modify charge and energy transport in perovskite materials, with potential applications in light-collecting or emitting devices. Copyright © 2024, The Authors. All rights reserved.

关键词： Perovskite

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Front Cover: Potassium Carbonate as a Low-Cost and Highly Active Solid Base Catalyst for Low-Temperature Methanolysis of Polycarbonate (ChemSusChem 2/2025)

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ChemSusChem 2025年第2期18卷

作者： Tzu-Ming Lin Philip Anggo Krisbiantoro Miyu Sato Yu-Chia Chang Eduardo C. Atayde Dr. Weisheng Liao Prof. Yuichi Kamiya Dr. Ryoichi Otomo Prof. Kevin C.-W. Wu Department of Chemical Engineering National Taiwan University Taipei 10617 Taiwan Molecular Science and Technology Program Taiwan International Graduate Program Academia Sinica Taipei 11529 Taiwan International Graduate Program of Molecular Science and Technology National Taiwan University Taipei 10617 Taiwan Graduate School of Environmental Science Hokkaido University Nishi 5 Kita 10 Kita-ku Sapporo 060-0810 Japan Department of Chemistry National Tsing Hua University Hsinchu 30013 Taiwan Faculty of Environmental Earth Science Hokkaido University Nishi 5 Kita 10 Kita-ku Sapporo Japan Department of Chemical Engineering and Materials Science Yuan Ze University Chung-Li Taoyuan Taiwan Department of Chemical Engineering Chung Yuan Christian University Taoyuan City 320 Taiwan

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Ipmc Electromechanical Behavior Analysis with Reduced Platinum Layer Aiming Economy and Lower Waste Generation

SSRN

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SSRN 2022年

作者： Dardis, Thiago Petrilli Maffei Saccardo, Matheus C. Tozzi, Kaique A. de Blanco, Guilherme Eduardo O. Zuquello, Ariel G. Barbosa, Rafael Scuracchio, Carlos Henrique Gonçalves, Roger Federal University of Sao Carlos Graduate Program in Materials Science and Engineering Sao Carlos Brazil ESPCI Paris PSL Research University 10 Rue Vauquelin Paris75005 France Baalbek Management 16 Rue Debelleyme Paris75003 France Department of Chemical Sciences University of Padova Via Marzolo 1 Padova35131 Italy Univ. Grenoble Alpes Univ. Savoie Mont Blanc CNRS Grenoble INP LEPMI UMR5279 Grenoble38000 France Federal University of Sao Carlos Graduate Program in Chemistry Sao Carlos Brazil

Ionomeric Polymer-Metal Composites (IPMCs) are smart materials formed by an electroactive polymer membrane coated on both sides by noble metal electrodes. When an electrical stimulus is applied, an electric field is generated between electrodes, and solvated ions migrate inside the polymeric membrane, causing an internal pressure gradient and bending the device. Despite numerous advantages, it is exceedingly expensive to use noble metals, such as gold and platinum. In addition, the deposition process generates a large amount of toxic waste. Thus, in this paper, a Nafion®-based IPMC with a reduced platinum layer (PR-IPMC) was prepared and electromechanically tested, comparing it with a reference IPMC (R-IPMC). The analyses were performed under precise relative humidity (RH) control. Blocking force and current response were used to evaluate its performance, and the morphology of the Pt layer was evaluated through Scanning Electron Microscopy (SEM). The devices performed better when RH = 90%. The PR-IPMC presented a 60% thinner electrode layer. However, just 40% less blocking force compared to R-IPMC. Besides, the reduced amount of platinum complex used to obtain the device represents a saving of reactants and less waste generation, with satisfactory mechanical performance. © 2022, The Authors. All rights reserved.

关键词： Toxic materials

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Efficiency enhancement in photoelectrochemical water splitting: Defect passivation and boosted charge transfer kinetics of zinc oxide nanostructures via chalcopyrite/chalcogenide mix sensitization

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Physical Review materials 2021年第12期5卷 125403-125403页

作者： Cigdem Tuc Altaf Nazrin Abdullayeva Ozlem Coskun Alihan Kumtepe İpek Deniz Yildirim Emre Erdem Maochang Liu Ali Bozbey Ertan Agar Mehmet Sankir Nurdan Demirci Sankir Micro and Nanotechnology Graduate Program TOBB University of Economics and Technology Sogutozu Caddesi No 43 Sogutozu 06560 Ankara Turkey Faculty of Engineering and Natural Sciences Sabanci University Orhanli Tuzla 34956 Istanbul Turkey International Research Center for Renewable Energy State Key Laboratory of Multiphase Flow in Power Engineering Xi'an Jiaotong University Xi'an Shaanxi 710049 People's Republic of China Department of Electrical and Electronics Engineering TOBB University of Economics and Technology Sogutozu Caddesi No 43 Sogutozu 06560 Ankara Turkey Department of Mechanical Engineering Energy Engineering Graduate Program University of Massachusetts Lowell Lowell Massachusetts 01854 USA Department of Materials Science and Nanotechnology Engineering TOBB University of Economics and Technology Sogutozu Caddesi No 43 Sogutozu 06560 Ankara Turkey

ZnO thin films in nanorod (NR) and nanoflower (NF) morphologies were used as photoelectrode scaffolds for efficient visible-light-driven photoelectrochemical (PEC) water splitting process, where their decoration with copper indium gallium sulfide (CIGS) and indium sulfide (In2S3) layers resulted in significant PEC performance enhancement. ZnO NF/CIGS/In2S3 photoelectrodes exhibited a remarkably high PEC efficiency (∼6.0% applied bias photon-to-current efficiency, 83% incident photon-to-current efficiency) due to the negligible dark current, while ZnO NR/CIGS/In2S3 generated a photocurrent density of ***–2 at 0.4 V (vs Ag/AgCl), being one of the highest performances reported in the literature for copper-based chalcopyrite photoelectrodes so far. The interfacial photoelectrode-electrolyte charge transport dynamics, investigated via intensity-modulated photocurrent spectroscopy, exhibited a sevenfold increase in charge transfer efficiencies with a significant drop in surface recombination kinetics for ZnO NF after CIGS/In2S3 decoration. The obtained results show consistency with numerically modeled electric field distribution profiles and electron paramagnetic resonance results of ZnO NF, rationalizing the enhanced charge transfer rates for decorated samples and confirming the defect passivating nature of CIGS/In2S3.

关键词： Electrochemical properties Photoconductivity

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Enhancing Stability and Performance in Perovskite Solar Cells Through Rationally Designed Phenanthro[9,10-D]Imidazole Derivatives for Tailored Interfacial engineering

SSRN

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SSRN 2024年

作者： Sun, Shih-Sheng Ramanujam, Rajarathinam Shi, Zhong-En Lung, Chien-Yu Li, Sie-Rong Wei, William Wu Wang, Chi-Chun Chen, Chih Ping Institute of Chemistry Academia Sinica Nankang Taipei11529 Taiwan Taiwan International Graduate Program Sustainable Chemical Science and Technology Academia Sinica Nankang Taipei11529 Taiwan Department of Applied Chemistry National Yang Ming Chiao Tung University Hsinchu30050 Taiwan Department of Materials Engineering Organic Electronics Research Center Ming Chi University of Technology 84 Gunjuan Road Taishan New Taipei City24301 Taiwan Taipei Fuhsing Private School 262 Section 1 Dun-Hua South Road Taipei Taiwan College of Engineering Center for Sustainability and Energy Technologies Chang Gung University Taoyuan City33302 Taiwan

Interfacial engineering techniques play a significant role in the development of perovskite solar cells (PSCs). In inverted PSCs, nickel oxide (NiOx) is commonly used as a hole transport material (HTM). The poor interactions at the NiOx/CH3NH3PbI3 (MAPbI3) interface contributed to the low stability and power conversion efficiency (PCE) in devices. To address this issue, dopant-free ultrathin interfacial layers (IFLs) have been introduced between the NiOx and perovskite. These IFLs enhance the chemical interaction between the NiOx and perovskite interfaces and result in improved device performance. Herein, T-shape phenanthro[9,10-d]imidazole derivatives, SR-1 and SR-2, were designed and synthesized. The SR-molecules were employed as IFL materials in p-i-n devices with a device configuration of ITO/NiOx/IFL/MAPbI3/PCBM/BCP/Ag. Notably, the IFLs serve multiple functions: modifying the energy levels of NiOx, improving the surface roughness and crystallinity of MAPbI3, passivating defects, enhancing charge extraction, and reducing trap density at the NiOx/MAPbI3 interface. As a result, the PCEs of both devices with SR-1 and SR-2 IFLs outperformed that of the pristine device. The best performance of 20.3% efficiency with nearly negligible hysteresis was achieved from the device with SR-1. The devices with SR-molecules achieved remarkable thermal stability under ambient air conditions and continuous heating at 60 °C with 50-60% relative humidity. © 2024, The Authors. All rights reserved.

关键词： Thermodynamic stability

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Manipulation of the nanoscale heliconical structure of a twist-bend nematic material with polarized light

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Physical Review Research 2020年第3期2卷 032004(R)-032004(R)页

作者： C. Feng J. Feng R. Saha Y. Arakawa J. Gleeson S. Sprunt C. Zhu A. Jákli Chemical Physics Interdisciplinary Program Advanced Materials and Liquid Crystal Institute Kent State University Kent Ohio 44242 USA Advanced Light Source Lawrence Berkeley National Lab Berkeley California 94720 USA Department of Physics Kent State University Kent Ohio 44242 USA Department of Applied Chemistry and Life Science Graduate School of Engineering Toyohashi University of Technology Toyohashi 441-8580 Japan

The effect of polarized violet light on the alignment and the heliconical pitch of a liquid crystal dimer containing both sulfur atoms and an azo linkage has been studied by tender resonant x-ray scattering. The results provide evidence of the manipulation of the nanoscale heliconical structure by polarized light. In addition to the bulk alignment of the heliconical nanostructure, the value of the heliconical pitch can be varied as well. After turning the light on, an increase of the pitch is observed in two steps. The increase with a subsecond timescale is attributed to the reduced heliconical order related to trans-cis photoisomerization. This is followed by a smaller increase over a 10-s timescale, which is likely related to the annihilation of defects. After turning the light off, the pitch first decreases within a few seconds to a value larger than the original (before illumination), and then relaxes further on a much longer (hours) timescale.

关键词： Chiral symmetry Dynamical phase transitions Twist deformation

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CuO NWs boosted triboelectric microfluidic nanosensor functionalized by collagen-protein interactions for real-time platelet count monitoring

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Chemical engineering Journal 2024年 490卷

作者： Lin, Jia-Cheng Kaswan, Kuldeep Chatterjee, Subhodeep Wu, Yu-Wen Kumar Sharma, Manish Ranjan, Ashok Roy Barman, Snigdha Lin, Yu-Zih Burnouf, Thierry Boireau, Wilfrid Lu, Ming-Yen Tu, Yong-Kwang Su, I-Chang Wu, Ping-Hsiu Lin, Zong-Hong Fan, Yu-Jui School of Biomedical Engineering Taipei Medical University Taipei11031 Taiwan Taipei Neuroscience Institute Taipei Medical University Taipei11031 Taiwan Department of Biomedical Engineering National Taiwan University Taipei11031 Taiwan International Intercollegiate PhD Program National Tsing Hua University Hsinchu30013 Taiwan Department of Power Mechanical Engineering National Tsing Hua University Hsinchu30013 Taiwan Graduate Institute of Biomedical Materials and Tissue Engineering Taipei Medical University Taipei11031 Taiwan Department of Material Science and Engineering National Tsing Hua University Hsinchu30013 Taiwan Institute of Biomedical Engineering National Tsing Hua University Hsinchu30013 Taiwan International PhD Program in Biomedical Engineering Taipei Medical University Taipei11031 Taiwan Université de Franche-Comté CNRS Institut FEMTO-ST BesançonF-25030 France Department of Neurosurgery Shuang Ho Hospital Taipei Medical University New Taipei City23561 Taiwan Department of Surgery School of Medicine College of Medicine Taipei Medical University Taipei11031 Taiwan Department of Radiology School of Medicine College of Medicine Taipei Medical University Taipei11031 Taiwan Department of Radiation Oncology Taipei Medical University Hospital Taipei11031 Taiwan Center for Precision Health and Quantitative Sciences Taipei Medical University Hospital Taipei 11031 Taiwan

Blood platelet count significantly affects the development of severe conditions like myocardial infarction, peripheral arterial ischemia, respiratory compromise, stroke, diabetes, coronavirus disease 2019 (COVID-19), along with chemotherapy patients and those suffering cardiovascular diseases (CVDs). These conditions necessitate frequent monitoring of platelet counts to guide diagnostic and therapeutic decisions. However, existing techniques are relatively time-consuming, lack of accuracy and require precise operation. The emergence of these severe diseases underscored the need to develop advanced platelet count-monitoring techniques which are rapid, highly precise, and conveniently portable for point-of-care applications. In this study, we emphasized the development of a triboelectric microfluidic nanosensor (TMNS) for platelet quantification through the assessment of flow resistance. The functionality of TMNS device is based on immobilization of platelets on a collagen layer coated inside a microfluidic channel. The triboelectric voltage output is measured as a detection signal of the flow resistance and is enhanced by incorporating high surface area copper oxide nanowires (CuO NWs) on the interior of copper tubes. These copper tubes serve as terminal electrodes and for flow guiding. The flow resistance of plasma solutions is elevated when the platelet concentration increases due to heightened adherence of platelets onto the collagen layer. Variations in flow resistance induce alterations in contact electrification, causing changes in output voltage at load terminals. Fine-tuning of the TMNS device was achieved by optimizing the channel width and length, flowing liquid viscosity, and voltage measurement technique. Platelet quantification sensing data were acquired through the combination of platelet-rich plasma (PRP) and platelet-poor plasma (PPP) solutions. The described device exhibits promising capabilities for platelet-count monitoring in whole-blood samples c

关键词： Copper oxides

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Deactivation/Regeneration Studies in Structured Monolithic Ni-Based Catalysts Applied in Dry Reforming of Methane

SSRN

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SSRN 2022年

作者： de Araújo, Ítalo R.S. Ribeiro, André T.S. Garcia, Ramón R.P. Sales, Deivson C.S. Almeida, Luciano C. Department of Chemical Engineering Technology and Geoscience Center Federal University of Pernambuco PE Recife50740-521 Brazil Polytechnic School of Pernambuco University of Pernambuco Rua Benfica 455 Madalena PE Recife50720-001 Brazil Materials Science and Engineering Graduate Program Federal University of Piauí PI Teresina Brazil Federal Rural University of Pernambuco Academic Unit of Cabo de Santo Agostinho PE Cabo de Santo Agostinho Brazil

In this work, the Ni/γ-Al2O3 (Ni/Al) and Ni/LA2O3-γ-Al2O3 (Ni/La-Al) catalysts were synthesized by the all-in-one method and used in the Dry Reforming of Methane (DRM). The catalysts were characterized and a smaller Ni crystallite size for the La-promoted catalyst was observed. The effects of the feed ratio (CH4:CO2), the use of La as a promoter of the catalyst support, and the use of the structured system in DRM reaction were investigated. Raman spectroscopy, scanning electron microscopy (SEM), and X-ray diffraction (XRD) were applied to investigate the catalytic deactivation effects. The deactivation of the structured catalysts was also evaluated by applying different weight hourly space velocities (WHSV): 20, 30, and 40 L gcat-1 h-1. Besides that, the regeneration of the catalysts was developed through the comparison of the treatment with CO2 and H2 atmospheres. The catalytic study of the powder samples showed that the lower the CH4:CO2 ratio the higher reactants conversion for both catalysts. It was also noted that the CH4:CO2 feed ratio of 4 provided a conversion 10 % higher for the Ni/La-Al catalyst in comparison with the Ni/Al catalyst. The analogy between the powder and structured systems implied greater conversion for the structured system. Furthermore, the greater and the lower deactivation of the structured systems were identified for the WHSV values of 40 and 20 L gcat-1 h-1, respectively. Finally, the regeneration treatment with CO2 showed to be more efficient than the treatment with H2 © 2022, The Authors. All rights reserved.

关键词： Carbon dioxide

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Bioplastics from orange processing waste and poly(lactic acid)

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Future Foods 2025年 11卷

作者： Laís T. Possari Marina S. de Paula George F. Nunes Iago A. Reis Marcos V. Basaglia Caio G. Otoni Sílvia H.P. Bettini Federal University of São Carlos (UFSCar) Graduate Program in Materials Science and Engineering (PPGCEM) São Carlos SP 13565-905 Brazil Federal University of São Carlos (UFSCar) Department of Materials Engineering (DEMa) São Carlos SP 13565-905 Brazil University of Campinas (UNICAMP) Institute of Chemistry Campinas SP 13083-862 Brazil

Bioplastics have the potential to mitigate the aggravating crisis of plastic pollution. Valorizing agri-food side streams for such a purpose is particularly beneficial as it valorizes massively produced waste, thus contributing to the shift towards circular and regenerative productive chains. In this work, citrus pulp (CP) obtained as a by-product from orange juice production was upcycled into thermoplastic compounds via extrusion-assisted plasticization with glycerol. Compounds with poly(lactic acid) (PLA) were then produced by extrusion melt blending. An experimental 2² factorial design with a central point was performed to evaluate their mechanical, thermal, and biodegradation behavior. The levels for the variables plasticized CP (PCP) and glycerol contents were 30 and 70 % for PCP, and 40 and 60 % for glycerol. Calorimetry showed that PCP increased PLA free volume and chain mobility. Still, the different fractions of PCP and glycerol did not alter the melting behavior of the compounds significantly. PCP led to a progressive toughening effect on PLA. Mass loss after 90 d of soil burial reached 53–64 % for the formulations containing 70 % PCP, and PLA chain scission was accelerated at 30 % PCP with 60 % glycerol, and 70 % PCP with 40 % glycerol. This work opens new pathways to citrus biomass valorization by exploring CP, a scarcely investigated residue, and a novel processing strategy. The produced compounds can be applied as bio-based semi-rigid packaging and utensils.

关键词： Biodegradable plastic PLA Biomass Food waste Upcycling Citrus sinensis

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Terahertz Landau Polaritons in Nano-slots: Ultrastrong Coupling under Extreme Spatial Confinement

Terahertz Landau Polaritons in Nano-slots: Ultrastrong Coupl...

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International Conference on Infrared and Millimeter Waves

作者： Dasom Kim Sunghwan Kim Dukhyung Lee Shuang Liang Fuyang Tay Michael J. Manfra Dai-Sik Kim Junichiro Kono Department of Electrical and Computer Engineering Rice University Houston TX USA Applied Physics Graduate Program Smalley-Curl Institute Rice University Houston TX USA Department of Physics Long-wavelength Nanotechnology Laboratory and Quantum Photonics Institute Ulsan National Institute of Science and Technology (UNIST) Ulsan South Korea Department of Physics and Astronomy Purdue University West Lafayette IN USA Birck Nanotechnology Center Purdue University West Lafayette IN USA Elmore Family School of Electrical and Computer Engineering Purdue University West Lafayette IN USA School of Materials Engineering Purdue University West Lafayette IN USA Department of Physics and Astronomy Rice University Houston TX USA Department of Material Science and NanoEngineering Rice University Houston TX USA

We report ultrastrong coupling of the cyclotron resonance of a two-dimensional electron gas in a GaAs quantum well to terahertz cavity photons under extreme confinement to the nanometer scale. This was realized by an array of nano-slots fabricated close to the quantum well layer on the GaAs substrate. Our terahertz magnetospectroscopic measurements revealed two polariton branches as a function of applied magnetic field. While the photon-like part of the two polariton branches was clearly observed, the matter-like part was generally elusive. Our electromagnetic simulations quantitatively reproduce our observation for the upper-polariton branch. However, for the lower-polariton branch, our simulations predict a pronounced resonance, which was absent in experimental spectra. This discrepancy may be a consequence of the breakdown of the dipole approximation in this extreme confinement situation.

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