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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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Influence of compatibilizer and carbon nanotubes on mechanical, electrical, and barrier properties of PTT/ABS blends

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Advanced Industrial and engineering Polymer Research 2019年第3期2卷 121-125页

作者： Braga, Natália F. LaChance, Anna Marie Liu, Bin Sun, Luyi Passador, Fabio R. Technology Laboratory of Polymers and Biopolymers Federal University of São Paulo São José dos CamposSP12231-280 Brazil Polymer Program Institute of Materials Science University of Connecticut StorrsCT06269 United States Department of Chemical and Biomolecular Engineering University of Connecticut StorrsCT06269 United States Beijing Key Laboratory of Electrochemical Process and Technology for Materials College of Materials Science and Engineering Beijing University of Chemical Technology Beijing100029 China Department of Biomedical Engineering University of Connecticut StorrsCT06269 United States

Composites based on poly (trimethylene terephthalate) (PTT)/acrylonitrile butadiene styrene (ABS) blend with maleic anhydride grafted PTT (PTT-g-MA) as a compatibilizer and carbon nanotubes (CNTs) as reinforcers were prepared via melt-mixing, and the mechanical, electrical, and barrier properties of the as-fabricated composites were evaluated. Scanning electron microscopy (SEM) characterization of the cross-section of the composites after tensile test showed improved phase stability in the presence of the compatibilizer PTT-g-MA. The toughness of the composites was also improved with the addition of the compatibilizer and CNTs. Electrical conductivity tests were carried out and the results showed that CNT-reinforced composite exhibited significantly increased conductivity. Since barrier properties are very sensitive to structural changes, the oxygen transmission rate (OTR) of the composites was measured and the results showed that the composites possess a much high oxygen barrier compared to that of the neat PTT or ABS. © 2019 Kingfa SCI. & TECH. CO., LTD.

关键词： Carbon nanotubes

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Single-Molecule Vibrational Characterization of Binding Geometry Effects on Isocyanide-Metal Interactions

arXiv

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arXiv 2025年

作者： Bi, Liya Wang, Zhe Balto, Krista Tao, Andrea R. Pascal, Tod A. Zhang, Yanning Figueroa, Joshua S. Li, Shaowei Department of Chemistry and Biochemistry University of California La Jolla San DiegoCA92093-0309 United States Program in Materials Science and Engineering University of California La Jolla San DiegoCA92093-0418 United States Department of Physics and Astronomy University of California IrvineCA92697-4575 United States Institute of Fundamental and Frontier Sciences University of Electronic Science and Technology of China Chengdu611731 China Aiiso Yufeng Li Family Department of Chemical and Nano Engineering University of California La Jolla San DiegoCA92093-0448 United States

Isocyanide-metal binding is governed by σ-donation and π-back-bonding, which affects the energy of the isocyanide stretching mode—a characteristic probe for ligand-metal interactions. While extensive correlations exist between structure and spectroscopy in molecular isocyanide-metal systems, isocyanide interactions with metallic crystalline surfaces, where ligands often bind in various geometries, remain poorly understood. Conventional vibrational spectroscopies, such as infrared and Raman, lack the molecular-scale resolution needed to distinguish these inhomogeneous configurations. In contrast, inelastic electron tunneling spectroscopy with scanning tunneling microscopy (STM-IETS) enables direct visualization of ligand adsorption geometries and their vibrational signatures. Using STM-IETS, here we investigate an metal-adsorbed m-terphenyl isocyanide ligand and find that adsorption geometry on Cu(100) induces a significant shift in isocyanide stretching frequency, even greater than replacing Cu(100) with Ag(111). Density functional theory confirms this shift arises from atomic-scale variations in isocyanide-metal binding. This study elucidates how atomic-scale binding influences the vibrational signatures of isocyanide ligands—an often-overlooked factor in understanding isocyanide-metal interactions. © 2025, CC BY.

关键词： Vibrational spectroscopy

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Simultaneous extraction of crude polysaccharides, soluble proteins, gingerols, and shogaols from dried ginger by subcritical water extraction

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LWT 2025年 225卷

作者： Sakdasri, Winatta Kaomaneechot, Sunanta Lasim, Sarida Somboon, Pichayada Chotigavin, Natthaporn Wongpromrat, Patthranit Sawangkeaw, Ruengwit Program in Food Process Engineering School of Food Industry King Mongkut's Institute of Technology Ladkrabang 1 Chalong Krung 1 Alley Latkrabang Bangkok10520 Thailand Program in Fermentation Technology School of Food Industry King Mongkut's Institute of Technology Ladkrabang 1 Chalong Krung 1 Alley Latkrabang Bangkok10520 Thailand Program in Food Science and Technology School of Food Industry King Mongkut's Institute of Technology Ladkrabang 1 Chalong Krung 1 Alley Latkrabang Bangkok10520 Thailand Department of Chemical Engineering School of Engineering King Mongkut's Institute of Technology Ladkrabang 1 Chalong Krung 1 Alley Latkrabang Bangkok10520 Thailand Research Unit in Bioconversion/Bioseparation for Value-Added Chemical Production Institute of Biotechnology and Genetic Engineering Chulalongkorn University 254 Phayathai Road Pathumwan Bangkok10330 Thailand

Subcritical water extraction (SWE) is a remarkable method for the simultaneous extraction of high- and low-polarity bioactive compounds from ginger. This study investigated the effects of temperature, pressure, and extraction time on the crude polysaccharide yield, protein content, total phenolic content (TPC), and amounts of 6-gingerol and 6-shogaol. The pressure was maintained at 30 bars, and the temperature and extraction time were optimized to maximize the polysaccharide yield, protein, TPC, gingerols, and shogaols contents. The rising temperatures (100–160 °C) and extended extraction times (10–50 min) enhanced the yield and TPC but negatively affected protein stability, leading to thermal degradation when the temperature surpassed 180 °C. Specifically, the content of 6-gingerol decreased at high temperatures because of its conversion into 6-shogaol. The optimal extraction conditions were 160 °C for 40 min at 30 bars, resulting in a polysaccharide yield of 8.54 %, protein content of 100.35 mg body surface area/g dry mass, TPC of 18.10 mg Galic acid (GA)/g dry mass, 6-gingerol content of 2.14 mg/g dry mass, and 6-shogaol content of 0.28 mg/g dry mass. Therefore, SWE effectively extracts various polar bioactive compounds from plant materials in a single step. © 2025 The Authors

关键词： Ginger polysaccharides Soluble protein Gingerols Shogaol Subcritical water

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engineering Native Biological Complexity from the Inside-out and Outside-in

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Nature chemical engineering 2024年第1期1卷 2-5页

作者： Cole A DeForest Bruce E Kirkpatrick Kristi S Anseth Department of Chemical Engineering University of Washington Seattle WA 98195 USA. Department of Bioengineering University of Washington Seattle WA 98195 USA. Department of Chemistry University of Washington Seattle WA 98195 USA. Institute of Stem Cell & Regenerative Medicine University of Washington Seattle WA 98109 USA. Molecular Engineering & Sciences Institute University of Washington Seattle WA 98195 USA. Institute for Protein Design University of Washington Seattle WA 98195 USA. Department of Chemical and Biological Engineering University of Colorado Boulder CO 80303 USA. The BioFrontiers Institute University of Colorado Boulder CO 80303 USA. Medical Scientist Training Program School of Medicine University of Colorado Aurora CO 80045 USA. Materials Science and Engineering Program University of Colorado Boulder CO 80303 USA.

Focusing on engineering control over cell function and fate, this article examines the critical balance of 'outside-in' and 'inside-ouť signaling in tissue development and regeneration. It highlights emerging strategies to manipulate these interactions, including biomaterial design and synthetic biology to influence this delicate equilibrium and fine tune cellular responses.

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Regioselective metal deposition on polymer-Au nanoparticle hybrid chains

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science China Materials 2019年第9期62卷 1363-1367页

作者： Zhiqi Huang Sihang Liu Yuejiao Zhang Jingliang Yang Jianfeng Li Zhihong Nie Jinlong Gong Key Laboratory for Green Chemical Technology of Ministry of Education School of Chemical Engineering and Technology Tianjin University Collaborative Innovation Center of Chemical Science and Engineering Tianjin 300072 China State Key Laboratory of Molecular Engineering of Polymers Department of Macromolecular Science Fudan University Shanghai 200438 China State Key Laboratory for Physical Chemistry of Solid Surfaces MOE Key Laboratory of Spectrochemical Analysis and Instrumentation College of Chemistry and Chemical Engineering iChEM Xiamen University Xiamen 361005 China

Templated growth is an important synthetic strategy for the construction of complex multicomponent nanostructures [1-3]. The commonly-used templates can be made from either “hard” materials [4-7](e.g., silica) or "soft" materials (e.g., micelles [8], polymers [9], supramolecules [10], etc.). Hard templates typically allow for good crystallinity of the final nanostructures and better preservation of the geometric feature of original templates [7,11], while soft templates are relatively easy to prepare and remove during the synthesis [12,13]. Recently, polymer- tethered inorganic nanoparticle (NP) assemblies (e.g., one-dimensional chains [14-17], two-dimensional sheets [18], and three-dimensional vesicles [19]) have attracted reasonable attention for their potential applications in diverse fields, such as bio-imaging and drug delivery [16] and surfece enhanced Raman scattering (SERS)[20]. Furthermore, these polymer-inorganic NP assemblies can serve as a new class of mixed soft-hard colloidal template for the fabrication of unconventional nanostructures. For instance, Nie and co-authors [21] firstly synthesized a variety of coaxial-like and Saturn-like multicomponent nanostructures by selective deposition of metals (e.g., Pd, Pt, Ag, Ni, etc.) or metal oxides (e.g., CeO2 and Cu2O) on seed Au NPs organized in polymer- Au NP assemblies, followed by dissociation of the assemblies. Nevertheless, there remains a challenge to precisely control the selective depos让ion of growth materials on the mixed soft-hard templates.

关键词：金纳米颗粒选择性生长金属链表高分子复合纳米材料表面活性剂表面等离子体

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Isolation and anticancer activity assay of stonefish (Synanceia horrida) bioactive stonustoxin

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AIP Conference Proceedings 2022年第1期2537卷 020002页

作者： Anondho Wijanarko Aulia Firdianna Mikael Januardi Ginting Kenny Lischer Muhamad Sahlan Heri Hermansyah Department of Chemical Engineering Faculty of Engineering Universitas Indonesia Kampus UI Depok West Java 16424 Indonesia Marine Science Postgraduate Program Faculty of Mathematics and Natural Science Universitas Indonesia Kampus UI Depok West Java 16424 Indonesia Research Center for Biomedical Engineering Faculty of Engineering Universitas Indonesia Kampus UI Depok West Java 16424 Indonesia

Breast cancer is a disease in which cells in the breast mutate and turn malignant, where the mutated cells spread to other parts of the body and develop into secondary cancer. In 2018, there were 58,256 new cases of breast cancer. With improper handling, breast cancer can be lethal, where there are 22,692 deaths in 2018 alone. One type of cancer with the most sufferers is estrogen, progesterone, and glucocorticoid receptors. Research on cancer treatment continues by looking for potential substances as new drugs. Toxins from animals that are cytolytic can trigger apoptosis in cancer cells. Some studies suggest that the lethal factor of the stonefish poison, Stonustoxin (SNTX), has cytolytic properties that damage cell membranes. This study discusses the stonefish (Synanceia horrida) venom as a breast anticancer agent. Stonefish poison was milked using a syringe, and the SNTX purification was carried out by the FPLC method using a 5 ml HiTrap Q H.P. substantial anion column. The percentage of inhibition of MCF-7 breast cancer cells will be measured using the MTT Assay method. As a result, MCF-7 breast cancer cells could be inhibited with IC50 values of 8.2771 µg/ml.

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Dehydration Sensing of a Polyvinyl Alcohol Film via Plasmonic Nanoparticles

Dehydration Sensing of a Polyvinyl Alcohol Film via Plasmoni...

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MRS Advances

作者： Lisunova, Milana O. School of Materials Science and Engineering School of Chemistry and Biochemistry Georgia Institute of Technology AtlantaGA30332 United States MicroElectronics-Photonics Program Institute for Nanoscience and Engineering Ralph E. Martin Department of Chemical Engineering 3202 Bell Engineering Center University of Arkansas FayettevilleAR72701 United States

In situ, real-time monitoring of a dehydration of poly(vinyl alcohol) (PVA) film is researched. The technique based on the incorporation plasmonic nanocages (NCs) between the two identical layers of PVA, (PVA)/NCs/(PVA) film, and its sensitivity to the variation of the refractive index of the surrounding PVA film via desorption water. The dehydration time increases from 180 (s) to 1800 (s) as the content of the PVA in the films increases twice, from (PVA)/NCs/(PVA) to (PVA)2/NCs/(PVA)2. Such effect could be explained by different rate of the molecules desorption from the PVA based films. Specifically, the dehydration rate is of 0.22 (vol% per s) and 0.026 (vol% per s) for (PVA)/NCs/(PVA) and (PVA)2/NCs/(PVA)2 films, respectively. The dehydration rate constant reduces from -50×10-4 (s-1) to -4.3 ×10-4 (s-1) as the content of PVA increases from (PVA)/NCs/(PVA) to (PVA)2/NCs/(PVA)2 films, respectively. © Materials Research Society 2019.

关键词： Plasmonics

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Molasses fermentation using K2 isolate immobilized by calcium alginate for ethanol production

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AIP Conference Proceedings 2024年第1期2970卷

作者： Getari Kasmiarti Hermansyah Claudia Indah Cantika Ferlinahayati Miksusanti Poedji Loekitowati Hariani Novia Doctoral Program of Environmental Science Graduate Program Universitas Sriwijaya Jl. Padang Selasa No.524 Bukit Besar Palembang City 30139 South Sumatra Indonesia Department of Chemistry Faculty of Mathematics and Natural Sciences Universitas Sriwijaya Jl. Padang Selasa No.524 Bukit Besar Palembang City 30139 South Sumatra Indonesia Department of Chemical Engineering Faculty of Engineering Universitas Sriwijaya Jl. Padang Selasa No.524 Bukit Besar Palembang City 30139 South Sumatra Indonesia

Molasses has a high sugar content and potentially good to be used as a fermentation substrate in the production of ethanol. The main purpose of this study is to compared the ethanol yield between free and immobilized on calcium alginate as the agent of fermentation. The fermentation of molasses was carried out directly using yeast isolate K2 which was free and immobilized on calcium alginate. Isolate K2 was tested physiologically first to determine the character of its tolerance to NaCl, pH, and molasses. The physiological character of isolate K2 showed its ability to grow at the limit of 12% NaCl, pH 3-6, and 25% molasses concentration at 30°C. The highest ethanol content was 1.96% from 25% molasses concentration with 24 hours fermentation using immobilized K2 isolate while the lowest ethanol content was 0.42% from 24 hours fermentation time using free yeast. Substantially, it can be concluded that the immobilization of K2 isolate in calcium alginate has the potential to increase the production of ethanol from molasses.

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Segmental Lennard-Jones interactions for semi-flexible polymer networks

arXiv

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arXiv 2021年

作者： Floyd, Carlos Chandresekaran, Aravind Ni, Haoran Ni, Qin Papoian, Garegin A. Biophysics Program University of Maryland College ParkMD20742 United States Department of Chemistry and Biochemistry University of Maryland College ParkMD20742 United States Department of Chemical and Biomolecular Engineering University of Maryland College ParkMD20742 United States Institute for Physical Science and Technology University of Maryland College ParkMD20742 United States

Simulating soft matter systems such as the cytoskeleton can enable deep understanding of experimentally observed phenomena. One challenge of modeling such systems is realistic description of the steric repulsion between nearby polymers. Previous models of the polymeric excluded volume interaction have the deficit of being non-analytic, being computationally expensive, or allowing polymers to erroneously cross each other. A recent solution to these issues, implemented in the MEDYAN simulation platform, uses analytical expressions obtained from integrating an interaction kernel along the lengths of two polymer segments to describe their repulsion. Here, we extend this model by re-deriving it for lower-dimensional geometrical configurations, deriving similar expressions using a steeper interaction kernel, comparing it to other commonly used potentials, and showing how to parameterize these models. We also generalize this new integrated style of potential by introducing a segmental Lennard-Jones potential, which enables modelling both attractive and repulsive interactions in semi-flexible polymer networks. These results can be further generalized to facilitate the development of effective interaction potentials for other finite elements in simulations of soft-matter systems. Copyright © 2021, The Authors. All rights reserved.

关键词： Lennard-Jones potential

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