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SSRN 2024年

作者： Knight, Katrina Breedlove, Sophya Obisesan, Temitope Egnot, Morgan Daneshdoost, Niusha King, Gabrielle G. Meyn, Leslie Gall, Ken Moalli, Pamela Department of Bioengineering University of Pittsburgh PittsburghPA United States Magee-Womens Research Institute PittsburghPA United States Departments of Mechanical Engineering Material Science Duke University DurhamNC United States Obstetrics Gynecology and Reproductive Sciences University of Pittsburgh PittsburghPA United States University of Pittsburgh School of Medicine United States

Complications following surgical repairs of pelvic organ prolapse (POP) with polypropylene mesh are common (~10%). Recent mechanistic data attributes complications in part to stiffness mismatches between the vagina and mesh. To address this problem, we developed a novel 3D printed elastomeric membrane (EM) from a softer polymer, polycarbonate urethane (PCU). Given that softer polymers have lower strength than rigid counterparts, EMs were manufactured with more material such that strength properties were similar to polypropylene. We hypothesized that the EMs would be associated with an improved host response as compared to polypropylene mesh despite their markedly increased weight. A secondary goal was to define the material distribution within EMs associated with the most favorable host response. EM constructs (2x1cm2) with varied polymer stiffness, fiber width, and device thickness combinations were implanted onto the vagina of New Zealand white rabbits for 12 weeks. Similarly sized lightweight and midweight polypropylene meshes were implanted for comparison. Sham animals (no device implanted) served as controls. EM constructs were associated with an overall superior host response as evidenced by improved tissue integration, preservation of vaginal smooth muscle morphology, and a significantly reduced macrophage response independent of how the material was distributed across the EM devices. EMs negatively impacted vaginal contractility and glycosaminoglycan content similar to polypropylene constructs but more favorably impacted collagen content. Collectively, the results suggest that softer PCU EMs made with more material are well tolerated by the vagina and that PCU is a possible future base material for POP repair devices. © 2024, The Authors. All rights reserved.

关键词： Stiffness

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Monolithic Germanium–Tin on Si Avalanche Photodiodes

arXiv

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arXiv 2024年

作者： Rudie, Justin Amoah, Sylvester Wang, Xiaoxin Kumar, Rajesh Abernathy, Grey Akwabli, Steven Grant, Perry C. Liu, Jifeng Li, Baohua Du, Wei Yu, Shui-Qing Material Science and Engineering University of Arkansas FayettevilleAR72701 United States Department of Electrical Engineering and Computer Science University of Arkansas FayettevilleAR72701 United States Thayer School of Engineering Dartmouth College HanoverNH03755 United States Arktonics LLC 1339 S. Pinnacle Dr. FayettevilleAR72701 United States Materials Science & Engineering Program University of Arkansas FayettevilleAR72701 United States Institute for Nanoscience and Engineering University of Arkansas FayettevilleAR72701 United States

We demonstrate monolithically grown germanium-tin (GeSn) on silicon avalanche photodiodes (APDs) for infrared light detection. A relatively thinner Ge buffer design was adopted to allow effective photo carriers to transport from the GeSn absorber to the Si multiplication layer such that clear punch-through behavior and a saturated primary responsivity of 0.3 A/W at 1550 nm were observed before avalanche breakdown in GeSn/Si APDs for the first time. The spectral response covers 1500 to 1700 nm. The measured punch-through and breakdown voltages are 15 and 17 V, respectively. Undisputed multiplication gain was obtained with the maximum value of 4.5 at 77 K, and 1.4 at 250 K, directly in reference to the saturated primary responsivity from the same device rather than a different GeSn p-i-n photodiode in previous reports. A peak responsivity was measured as 1.12 A/W at 1550 nm and 77 K. © 2024, CC0.

关键词： Avalanche photodiodes

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Advances in vat photopolymerization: early-career researchers shine light on a path forward

RSC Applied Polymers

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RSC Applied Polymers 2025年第3期3卷 574-591页

作者： Dhand, Abhishek P. Bean, Ren H. Chiaradia, Viviane Commisso, Alex J. Dranseike, Dalia Fowler, Hayden E. Fraser, Julia M. Howard, Holden Kaneko, Takashi Kim, Ji-Won Kronenfeld, Jason M. Mason, Keldy S. Pashley-Johnson, Fred Porcincula, Dominique H. Segal, Maddison I. Yu, Siwei Saccone, Max A. Department of Bioengineering University of Pennsylvania Philadelphia PA United States Sandia National Laboratories Albuquerque NM United States Department of Chemistry RCSI University of Medicine and Health Sciences Dublin Ireland Macromolecular Engineering Laboratory Department of Mechanical and Process Engineering ETH Zurich Zurich Switzerland Department of Chemistry University of Wisconsin-Madison Madison WI United States Materials Engineering Division Lawrence Livermore National Laboratory United States Department of Chemistry and Biochemistry University of California Santa Barbara CA United States Department of Chemical Engineering Kyungpook National University Daegu South Korea Department of Chemistry Stanford University Stanford CA United States Department of Chemistry The University of Texas at Austin Austin TX United States School of Chemistry and Physics Centre for Materials Science Queensland University of Technology (QUT) Brisbane QLD Australia Centre of Macromolecular Chemistry (CMaC) Department of Organic and Macromolecular Chemistry Faculty of Sciences Ghent University Ghent Belgium Thomas Lord Department of Mechanical Engineering & Material Science Duke University Durham NC United States Department of Chemistry University of Washington Seattle WA United States Department of Chemical Engineering Stanford University Stanford CA United States Paul M. Rady Department of Mechanical Engineering University of Colorado Boulder Boulder CO United States

Vat photopolymerization (VP) has emerged as a promising additive manufacturing technique to allow rapid light-based fabrication of 3D objects from a liquid resin. Research in the field of vat photopolymerization spans across multiple disciplines from engineering and materials science to applied chemistry and physics. This perspective brings together early-career researchers from various disciplines in academia and national laboratories around the world to summarize the most recent advancements with special emphasis on the research highlighted as part of the Gordon Research Conference (GRC) 2024 meeting on Additive Manufacturing of Soft materials. We provide an outlook on next-generation polymer processing methods from synthesis of novel materials to multimodality manufacturing and performance engineering. Further, this article combines the ideas of many of these junior researchers to present a vision for the future of the field by highlighting the challenges and opportunities that lie ahead. © 2025 RSC.

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Piezoelectricity of strain-induced overall water splitting of Ni(OH)2/MoS2 heterostructure

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Journal of materials Chemistry A 2023年第7期11卷 3481-3492页

作者： Le, Kim Tuyen Pham, Nguyet N. T. Liao, Yin-Song Ranjan, Ashok Lin, Hsun-Yen Chen, Po-Han Nguyen, Hoang Lu, Ming Yen Lee, Seung Geol Wu, Jyh Ming Department of Materials Science and Engineering National Tsing Hua University 101 Section 2 Kuang Fu Road Hsinchu300 Taiwan Department of Chemistry University of Science Vietnam National University Ho Chi Minh City Viet Nam School of Chemical Engineering Pusan National University 2 Busandaehak-ro 63 beon-gil Geumjeong-gu Busan46241 Korea Republic of Department of Organic Material Science and Engineering Pusan National University 2 Busandaehak-ro 63 beon-gil Geumjeong-gu Busan46241 Korea Republic of PhD Program in Prospective Functional Materials Industry National Tsing Hua University 101 Section 2 Kuang Fu Road Hsinchu300 Taiwan High Entropy Materials Center National Tsing Hua University 101 Section 2 Kuang Fu Road Hsinchu300 Taiwan Vietnam National University Ho Chi Minh City Linh Trung Ward Thu Duc City Ho Chi Minh City700000 Viet Nam

In this study, we synthesized several active sites of molybdenum disulfide (MoS2) nanoflowers (NFs) decorated with Ni(OH)2 nanoparticles (NPs) to form heterostructures. Our results revealed that Ni(OH)2/MoS2 NF heterostructures caused the splitting of water into hydrogen (H2) and oxygen (O2) gas. The Ni(OH)2/MoS2 NF interface exhibited strain-induced piezoelectric potential (piezopotential) that promoted charge separation, reducing the kinetic barrier in the water splitting process and promoting the hydrogen evolution reaction (HER) and the oxygen evolution reaction (OER). In high-resolution transmission microscopy images, the measured lattice fringe d spacing was approximately 0.67 nm, which was higher than the reported value. The calculated tensile strain of Ni(OH)2/MoS2 NF heterostructures was approximately 3.5%. The findings based on density-functional theory and using the finite element method indicated that the interfacial piezopotential generated between Ni(OH)2 and MoS2 NFs enhanced charge transfer and electrochemical reactions. To obtain a current density up to 10 mA cm−2, we set the overpotential and Tafel slope of Ni(OH)2/MoS2 NF heterostructures at 155 mV and 62.1 mV dec−1 for the HER and 328 mV and 69.3 mV dec−1 for the OER, respectively. Moreover, a high Faraday efficiency (84.1%) was observed over 48 h, with no significant decline in the HER and OER. © 2023 The Royal Society of Chemistry.

关键词： Molybdenum disulfide

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Propolis nanoemulsion extract from celebes stingless bee (Tetragonula biroi) phytochemistry and antibacterial analysis to periodontopathogen bacteria

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Journal of Oral Biology and Craniofacial Research 2025年第3期15卷 576-584页

作者： Amalia, Nadya Rafika Budhy, Theresia Indah Ridwan, Rini Devijanti Rianti, Devi Bramantoro, Taufan Luthfi, Muhammad Ramadhani, Nastiti Faradilla Pramusita, Adya Putranti, Nurul Aisyah Rizki Nugraha, Albertus Putera Situmorang, Putri Cahaya Shariff, Khairul Anuar Nugraha, Alexander Patera Dental Health Science Study Program Faculty of Dental Medicine Universitas Airlangga Surabaya Indonesia Department of Oral and Maxillofacial Pathology Faculty of Dental Medicine Universitas Airlangga Surabaya Indonesia Department of Oral Biology Faculty of Dental Medicine Universitas Airlangga Surabaya Indonesia Department of Dental Material Faculty of Dental Medicine Universitas Airlangga Surabaya Indonesia Department of Dental Public Health Faculty of Dental Medicine Universitas Airlangga Surabaya Indonesia Department of Dentomaxillofacial Radiology Faculty of Dental Medicine Universitas Airlangga Surabaya Indonesia Department of Orthodontic Faculty of Dental Medicine Universitas Airlangga Surabaya Indonesia Faculty of Medicine Universitas Airlangga Surabaya Indonesia Biology Study Program Faculty of Mathematics and Natural Sciences Universitas Sumatera Utara Medan Indonesia School of Materials and Mineral Resources Engineering Engineering Campus Universiti Sains Malaysia Penang Nibong Tebal 14300 Malaysia

Background: Propolis from Sulawesi's stingless bees (Tetragonula biroi) contains antioxidants, more flavonoids than propolis from Apis bees, and the antibacterial ability. Objective: to examine the antibacterial properties of Propolis Nanoemulsion Extract (PNE), which is extracted from the Celebes Stingless Bee (T. biroi), in relation to the periodontopathogen bacteria such as Fusobacterium nucleatum (Fn), Porphyromonas gingivalis (Pg), Aggregatibacter actinomycetemcomitans (Aa), and Provotella intermedia (Pi). This investigation also examines PNE's phytochemistry, particle size analysis (PSA), and zeta potential. Methods: The maceration process with 96 % ethanol was used to create PNE from Celebes stingless bee (T. biroi), which was then subjected to zeta potential measurement and PSA. Phytochemical analysis was used to identify phytochemical constituents in the PNE (T. biroi). Diffusion zone, minimum bactericidal concentration (MBC), and minimum inhibitory concentration (MIC) were used to assess antibacterial efficacy against Aa, Pg, Pi, and Fn. Furthermore, the statistical analysis was used to extract the data. Results: Phenols, alkaloids, and flavonoids were identified;however, triterpenoids and saponins were not. Between 151.28 and 182.2 diameter nanometers (***) was the range of the PNE's diameter. At 1.56 % propolis (T. biroi) concentration, the MIC, MBC, and diffusion zone analysis performed better than at 0.76 %, with a significant difference (p:0.01;p < 0.05) to Aa, Pg, Pi, and Fn. Conclusions: The highest antibacterial activity against Aa, Pg, Pi, and Fn as periodontopathogen bacteria is demonstrated by alkaloids, flavonoids, and phenols in PNE from Celebes (T. biroi) at a concentration of 1.56 %. © 2025 The Authors

关键词： Antibacterial Communicable disease Infectious disease Medicine Periodontal disease

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Enzyme Mimics Based on Self-Assembled Peptide Functionalized with Graphene Oxide for Polyethylene Terephthalate Degradation

SSRN

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SSRN 2024年

作者： Li, Xia Zhou, Yaoling Yue, Jingchao Song, Mengyu Lei, Xiangmin Li, Piwu Li, Jianpeng Sun, Dengyue Zeng, Zhixiong State Key Laboratory of Biobased Material and Green Papermaking Qilu University of Technology Shandong Academy of Science Jinan250353 China School of Bioengineering Qilu University of Technology Shandong Academy of Science Jinan250353 China State Key Laboratory of Food Nutrition and Safety Key Laboratory of Food Quality and Healthy of Tianjin College of Food Science and Engineering Tianjin University of Science and Technology Tianjin300457 China School of Food Science and Engineering Qilu University of Technology Shandong Academy of Sciences Jinan250353 China Hunan Provincial Key Laboratory of the TCM Agricultural Biogenomics Changsha Medical University Changsha410219 China

The degradation of polyethylene terephthalate (PET) has garnered notable attention owing to its widespread accumulation and the challenges associated with its breakdown. Herein, the enzyme mimics with PET-hydrolytic activity were developed by combining peptide nanofibers with graphene oxide (GO). Inspired by native enzymes, we designed self-assembled peptides that included active amino acids (serine, histidine, aspartate and tryptophan) and different hydrophobic amino acids, with a 9-fluorenylmethoxycarbonyl group at the N-terminus. Our comparison of hydrophobic amino acids revealed that their content not only influenced the higher-order assembly of peptide but also affected molecular conformation and PET degradation ability. By co-assembling two peptides with catalytic and binding sites in a 1:1 ratio, a more effective active enzyme mimic was constructed which was owning to the cooperative interactions among the active amino acids;in addition, hydrogen bonds and π-π stacking interactions were the main forces in enhancing catalytic effects. To further improve PET-hydrolytic ability, the co-assembled enzyme mimic was functionalised with GO through π–π stacking. This GO-peptide nanofiber hybrid exhibited increased PET-hydrolytic, as GO provided a hydrophobic microenvironment for substrate attraction and abundant carbon for facilitating proton transfer. The GO-peptide nanofiber hybrid as enzyme mimics will be a promising material for PET degradation. © 2024, The Authors. All rights reserved.

关键词： Hydrogen bonds

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Effect of TiO 2 concentration in PVDF-TiO 2 -PVP mixed matrix membrane performance using ultrafiltration process

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materials Today: Proceedings 2024年 96卷 1-5页

作者： Rianyza Gayatri Erna Yuliwati Ahmad Noor Syimir Fizal Muhamad Zulhilmi Zailani Juhana Jaafar Muzafar Zulkifli Wirach Taweepreda Ahmad Naim Ahmad Yahaya Universiti Kuala Lumpur Malaysian Institute of Chemical and Bioengineering Technology Alor Gajah Melaka 78000 Malaysia Department of Material Science and Technology Faculty of Science Prince of Songkla University (PSU) Hat Yai Songkla 90110 Thailand Program Study of Chemical Engineering Faculty of Engineering Universitas Muhammadiyah Palembang Jalan A.Yani 13 Ulu Kota Palembang 30263 Indonesia Centre for Sustainability of Ecosystem & Earth Resources (Pusat ALAM) Universiti Malaysia Pahang Lebuh Persiaran Tun Khalil Yaakob 26300 Gambang Pahang Malaysia Advanced Membrane Technology Research Centre (AMTEC) Faculty of Chemical and Energy Engineering Universiti Teknologi

This study investigated how the addition of hydrophilic TiO 2 to a porous asymmetric polyvinylidene fluoride (PVDF) Ultrafiltration (UF) membrane altered its properties and performance. The hydrophilicity and flux of PVDF and polyvinylpyrrolidone (PVP) combinations will be lower, and TiO 2 will significantly impact raising those values. By mixing titanium dioxide (TiO 2 ) nanoparticles with a pore-forming agent in a dope solution, PVDF-TiO 2 -PVP membranes were prepared via non-solvent-induced phase inversion method. Experiments using PVDF membranes with varying concentrations of TiO 2 (0, 0.25, 0.5, 1, 1.5, and 2% wt) were applied to evaluate pure water flux and Bovine Serum Albumin (BSA) flux. The functional group composition of membranes was investigated by Fourier transform infrared spectroscopy. The wettability of porous membranes was determined by measuring contact angles. Results demonstrated that membranes constructed from PVDF/PVP/TiO 2 with a lower loading of TiO 2 nanoparticles had a smaller mean pore size, more apertures inside the membrane, and better membrane hydrophilicity. The highest flux of pure water (121 L/m 2 h) was achieved by the PVDF-TiO 2 -PVP mixed-matrix membrane at a TiO 2 concentration of 2 wt%.

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Preparation and Industrial Evaluation of Clinker Admixture in a New Dry-Process Cement Kiln

SSRN

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SSRN 2023年

作者： Wang, Zhiqiang Feng, Enjuan Han, Haisheng Zhang, Ye School of Mineral Processing and Bioengineering Central South University Hunan Changsha410083 China Shandong Provincial Key Laboratory of Cement Admixtures Linyi Conch New Material Technology Co. Ltd. Shandong Linyi276034 China National Engineering Research Center for Integrated Utilization of Salt Lake Resource School of Chemical Engineering East China University of Science and Technology Shanghai200237 China

Cement is a significant construction material. However, the traditional cement industry generally suffers great energy consumption and environmental pollution problems that cannot be ignored. In this study, a compound clinker admixture was developed and applied for cement preparation to enhance energy efficiency and improve environmental pollution. The effects of admixtures on grinding, decomposition, and mineralization of raw material were investigated systematically by utilizing XRD, polarization microscope, and TG-DSC. It is demonstrated that admixtures could reduce the particle size of raw material after grinding and improve the decomposition efficiency of carbonate minerals in raw material. Furthermore, they could help weaken the formation barrier of C3S, reduce the formation temperature, and promote the transformation of C2S to C3S during clinker calcination. In the industrial test, the admixtures could improve the production of cement raw mill and kiln, reduce the power consumption of the production process, save the standard coal for clinker calcination, and reduce the emission of NOx and SO2. It is estimated that adding 0.15 % admixture can bring a direct economic benefit of 6924.85 dollars per day, save 31.38t standard coal per day and reduce the carbon emission by 84.73t per day for the cement plant. © 2023, The Authors. All rights reserved.

关键词： Energy utilization

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Lithium-ion battery functionality over broad operating conditions via local high concentration fluorinated ester electrolytes

RSC Applied Interfaces

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RSC Applied Interfaces 2024年第5期1卷 1077-1092页

作者： Quilty, Calvin D. Marin Bernardez, Edelmy J. Nicoll, Andrew Hossain, MD Jamil Kingan, Arun Arnot, David J. Mohamed, Hafsa A. Tong, Xiao Jaye, Cherno Fischer, Daniel A. Wang, Lei Qi, Yue Takeuchi, Esther S. Marschilok, Amy C. Yan, Shan Bock, David C. Takeuchi, Kenneth J. Department of Chemistry Stony Brook University Stony Brook 11794 NY United States Institute of Energy: Sustainability Environment and Equity (I:SEE) Stony Brook University Stony Brook 11794 NY United States School of Engineering Brown University Providence 02912 RI United States Department of Materials Science and Chemical Engineering Stony Brook University Stony Brook 11794 NY United States Science Undergraduate Laboratory Internship (SULI) Program Brookhaven National Laboratory Upton 11973 NY United States Department of Chemistry University of Rochester Rochester 14627 NY United States Department of Chemistry The College of Wooster Wooster 44691 OH United States Center for Functional Nanomaterials Brookhaven National Laboratory Upton 11973 NY United States Material Measurement Laboratory National Institute of Standards and Technology Gaithersburg 20899 MD United States Interdisciplinary Science Department Brookhaven National Laboratory Upton 11973 NY United States

Facilitating widespread adoption of electric vehicles will require next-generation battery systems that can operate reliably over a large temperature range, at high operating voltage, and under fast charging rates. Herein, a novel class of nonflammable fluorinated ester-based local high concentration electrolytes (LHCEs) are described. When cycled in commercially relevant graphite/LiNi_0.8Mn_0.1Co_0.1O₂ (NMC811) pouch cells, these electrolytes demonstrate improved capacity retention compared to carbonate-based electrolytes under multiple usage conditions including high voltage (4.5 V), fast charge (4C, 15 minutes), and low temperature (−20 °C) without sacrificing capacity retention at elevated temperature (40 °C). Low carbon, high fluoride cathode electrolyte interphases formed by the LHCE system yield a significant reduction in charge transfer impedance during cycling and contribute to capacity retention. These results demonstrate that using fluorinated esters in a LHCE modality enables creation of a new class of nonflammable electrolytes that can successfully operate over broad operating conditions. © 2024 RSC.

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Accelerating Radiochemistry Development: Automated Robotic Platform for Performing Up to 64 Droplet Radiochemical Reactions in a Morning

SSRN

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SSRN 2023年

作者： Jones, Jason Do, Viviann Lu, Yingqing van Dam, R. Michael Los AngelesCA United States Physics and Biology in Medicine Interdepartmental Graduate Program UCLA United States Department of Molecular & Medical Pharmacology David Geffen School of Medicine UCLA United States Department of Biochemistry UCLA United States Department of Bioengineering Henry Samueli School of Engineering and Applied Science UCLA United States

The growing discovery and development of novel radiopharmaceuticals and radiolabeling methods requires an increasing capacity for radiochemistry experiments. However, such studies typically rely on radiosynthesizers designed for clinical batch production rather than research, greatly limiting throughput. Two general solutions are being pursued to address this: developing new synthesis optimization algorithms to minimize how many experiments are needed, and developing apparatus with enhanced experiment throughput. We describe here a novel high-throughput system based on performing arrays of droplet-based reactions at 10 μL volume scale in parallel. The automatic robotic platform can perform a set of 64 experiments in ~3 h (from isotope loading to crude product, plus sampling onto TLC plates), plus ~1 h for off-line radio-TLC analysis and radioactivity measurements, rather than the weeks or months that would be needed using a conventional system. We show the high repeatability and low crosstalk of the platform and demonstrate optimization studies for two 18F-labeled tracers. This novel automated platform greatly increases the practicality of performing arrays of droplet reactions by eliminating human error, vastly reducing tedium and fatigue, minimizing radiation exposure, and freeing up radiochemist time for more intellectually valuable pursuits. © 2023, The Authors. All rights reserved.

关键词： Drops

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