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Journal articles on the topic 'Interface hydrogel/substrat'

Author: Grafiati

Published: 25 May 2024

Last updated: 31 July 2025

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1

Lin, Yue-Xian, Shu-Han Li, and Wei-Chen Huang. "Fabrication of Soft Tissue Scaffold-Mimicked Microelectrode Arrays Using Enzyme-Mediated Transfer Printing." Micromachines 12, no. 9 (2021): 1057. http://dx.doi.org/10.3390/mi12091057.

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Hydrogels are the ideal materials in the development of implanted bioactive neural interfaces because of the nerve tissue-mimicked physical and biological properties that can enhance neural interfacing compatibility. However, the integration of hydrogels and rigid/dehydrated electronic microstructure is challenging due to the non-reliable interfacial bonding, whereas hydrogels are not compatible with most conditions required for the micromachined fabrication process. Herein, we propose a new enzyme-mediated transfer printing process to design an adhesive biological hydrogel neural interface. T

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2

Liu, Junjie, Nan Hu, Yao Xie, Peng Wang, Jingxiang Chen, and Qianhua Kan. "Polyacrylic Acid Hydrogel Coating for Underwater Adhesion: Preparation and Characterization." Gels 9, no. 8 (2023): 616. http://dx.doi.org/10.3390/gels9080616.

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Underwater adhesion involves bonding substrates in aqueous environments or wet surfaces, with applications in wound dressing, underwater repairs, and underwater soft robotics. In this study, we investigate the underwater adhesion properties of a polyacrylic acid hydrogel coated substrate. The underwater adhesion is facilitated through hydrogen bonds formed at the interface. Our experimental results, obtained through probe-pull tests, demonstrate that the underwater adhesion is rapid and remains unaffected by contact pressure and pH levels ranging from 2.5 to 7.0. However, it shows a slight inc

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Yang, Yueh-Hsun Kevin, Courtney R. Ogando, and Gilda A. Barabino. "In Vitro Evaluation of the Influence of Substrate Mechanics on Matrix-Assisted Human Chondrocyte Transplantation." Journal of Functional Biomaterials 11, no. 1 (2020): 5. http://dx.doi.org/10.3390/jfb11010005.

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Matrix-assisted chondrocyte transplantation (MACT) is of great interest for the treatment of patients with cartilage lesions. However, the roles of the matrix properties in modulating cartilage tissue integration during MACT recovery have not been fully understood. The objective of this study was to uncover the effects of substrate mechanics on the integration of implanted chondrocyte-laden hydrogels with native cartilage tissues. To this end, agarose hydrogels with Young’s moduli ranging from 0.49 kPa (0.5%, w/v) to 23.08 kPa (10%) were prepared and incorporated into an in vitro human cartila

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Pickrell, D. J., W. Zhu, A. R. Badzian, R. E. Newnham, and R. Messier. "Near-interface characterization of diamond films on silica and silicon." Journal of Materials Research 6, no. 6 (1991): 1264–77. http://dx.doi.org/10.1557/jmr.1991.1264.

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The near-interface structure of diamond films grown from a methane and hydrogen gas mixture by microwave plasma enhanced chemical vapor deposition has been studied. Freestanding diamond films grown on both silica and silicon at two different methane concentrations were analyzed by scanning and transmission electron microscopies, electron diffraction, Raman spectroscopy, and secondary ion mass spectroscopy. It was found that the substrate chemistry greatly influenced the nature of the carbon initially deposited on the substrate surface. Diamond formed large flat contact areas on silicon, wherea

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He, Meiyi, Guge Niku, and Wenjiang Zheng. "Hydrophobic Initiator Activates the Interface Reaction to Trigger Polymerization Graft Polytetrafluoroethylene Catheter." International Journal of Materials Science and Technology Studies 3, no. 1 (2025): 52–62. https://doi.org/10.62051/ijmsts.v3n1.06.

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Decreasing the surface friction coefficient of medical catheters is important especially in interventional treatment, but the current solution involves high cost or cumbersome manufacturing processes. In order to effectively solve the problem of high friction coefficient of the inner and outer layers in the use of medical catheters and simplify the manufacturing process, we use polytetrafluoroethylene (PTFE) as a catheter material to graft directly with PAAm hydrogel. In order to overcome the high chemical inertness and low surface energy of PTFE, nitrogen ion injection is used to modify the s

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Hens, Philip, Julian Müller, Erdmann Spiecker, and Peter J. Wellmann. "Defect Structures at the Silicon/3C-SiC Interface." Materials Science Forum 717-720 (May 2012): 423–26. http://dx.doi.org/10.4028/www.scientific.net/msf.717-720.423.

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In all heteroepitaxial systems the interface between substrate and layer is a crucial point. In this work SEM and TEM studies on the interface between silicon substrate and cubic silicon carbide (3C-SiC) layers obtained by chemical vapor deposition (CVD) are presented. A clear connection between process parameters, like the design of substrate cleaning, and the heating ramp, and resulting defect structures at the substrate-layer interface could be found. Whereas the process step of etching in hot hydrogen for oxide removal is crucial for avoiding the generation of closed voids of type 2, the d

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Yang, Shuaijun, Yucheng Zhu, Chaoming Wang, Ruidong Li, Jun Hu та Zhong Chen. "Evaluation of Hydrogen Trapping Capability at Interfaces Between Vanadium Carbide and Vanadium Nitride Nanoprecipitates with α-Fe by Density Functional Theory". Coatings 15, № 4 (2025): 466. https://doi.org/10.3390/coatings15040466.

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The interface between dispersed compound nanoprecipitates and metal substrates can act as effective hydrogen traps, impeding hydrogen diffusion and accumulation, thus mitigating the risk of hydrogen embrittlement and hydrogen-induced coating failure. In this study, we considered the precipitation of vanadium carbide (VC) and vanadium nitride (VN) nanoprecipitates on a body-centered cubic Fe (α-Fe) substrate in the Kurdjumov–Sachs (K–S) orientation relationship. To evaluate the stability and hydrogen trapping ability of the interface, we used the first-principles method to calculate the interfa

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Bordbar-Khiabani, Aydin, Ilijana Kovrlija, Janis Locs, Dagnija Loca, and Michael Gasik. "Octacalcium Phosphate-Laden Hydrogels on 3D-Printed Titanium Biomaterials Improve Corrosion Resistance in Simulated Biological Media." International Journal of Molecular Sciences 24, no. 17 (2023): 13135. http://dx.doi.org/10.3390/ijms241713135.

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The inflammatory-associated corrosion of metallic dental and orthopedic implants causes significant complications, which may result in the implant’s failure. The corrosion resistance can be improved with coatings and surface treatments, but at the same time, it might affect the ability of metallic implants to undergo proper osteointegration. In this work, alginate hydrogels with and without octacalcium phosphate (OCP) were made on 3D-printed (patterned) titanium alloys (Ti Group 2 and Ti-Al-V Group 23) to enhance their anticorrosion properties in simulated normal, inflammatory, and severe infl

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9

Arendse, Christopher J., Theophillus F. G. Muller, Franscious R. Cummings, and Clive J. Oliphant. "Oxidation Reduction in Nanocrystalline Silicon Grown by Hydrogen-Profiling Technique." Journal of Nano Research 41 (May 2016): 9–17. http://dx.doi.org/10.4028/www.scientific.net/jnanor.41.9.

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The deposition of a compact amorphous silicon/nano-crystalline silicon material is demonstrated by hot-wire chemical vapour deposition using a sequential hydrogen profiling technique at low hydrogen dilutions. Nano-crystallite nucleation occurs at the substrate interface that develops into a uniform, porous crystalline structure as the growth progresses. A further reduction in the H-dilution results in the onset of a dense amorphous silicon layer. The average crystalline volume fraction and nano-crystallite size in the sample bulk amounts to 30% and 6 nm, respectively, as probed by Raman spect

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Aydin, Bordbar-Khiabani, Kovrlija Ilijana, Locs Janis, Loca Dagnija, and Gasik Michael. "Octacalcium Phosphate-Laden Hydrogels on 3D-Printed Titanium Biomaterials Improve Corrosion Resistance in Simulated Biological Media." International Journal of Molecular Sciences 24, no. 17 (2023): 13135. https://doi.org/10.3390/ijms241713135.

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The inflammatory-associated corrosion of metallic dental and orthopedic implants causes significant complications, which may result in the implant’s failure. The corrosion resistance can be improved with coatings and surface treatments, but at the same time, it might affect the ability of metallic implants to undergo proper osteointegration. In this work, alginate hydrogels with and without octacalcium phosphate (OCP) were made on 3D-printed (patterned) titanium alloys (Ti Group 2 and Ti-Al-V Group 23) to enhance their anticorrosion properties in simulated normal, inflammatory, and sever

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11

Zhao, Zhitong, Weiwei Gao, and Hao Bai. "A mineral layer as an effective binder to achieve strong bonding between a hydrogel and a solid titanium substrate." Journal of Materials Chemistry B 6, no. 23 (2018): 3859–64. http://dx.doi.org/10.1039/c8tb01042k.

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12

Tamura, Motonori. "Hydrogen Permeation of Multi-Layered-Coatings." Advanced Materials Research 1152 (April 2019): 9–18. http://dx.doi.org/10.4028/www.scientific.net/amr.1152.9.

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Using a substrate of AISI 316L austenitic stainless steel, which is used for components in high-pressure hydrogen systems, the hydrogen barrier properties of samples with single-layer coatings of TiC, TiN, and TiAlN as well as a multi-layered coating of TiAlN and TiMoN were evaluated. The ion plating method was used, and coating thicknesses of 2.0–2.6 μm were obtained. Hydrogen permeation tests were carried out under a differential hydrogen pressure of 400 kPa and at a temperature between 573 and 773 K, and the quantities of hydrogen that permeated the samples were measured. This study aimed a

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Cho, Wonkyung, Min-Ah Oh, Sun-heui Yoon, Chang Il Shin, Minji Jung, and Taek Dong Chung. "(Keynote) Biologically Targeted Janus Synapse between Ultramicroelectrode and Primary Neuron." ECS Meeting Abstracts MA2024-02, no. 54 (2024): 3677. https://doi.org/10.1149/ma2024-02543677mtgabs.

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Seamless neural interfaces conjoining neurons and electrochemical devices hold great potential for highly efficient signal transmission across neuronal systems and the external world. Signal transmission through chemical sensing and stimulation via electrochemistry is remarkable because communication occurs through the same chemical language of neurons. One promising approach is a synaptogenesis-involving method, which offers an opportunity for synaptic signaling between these systems. Janus synapses, one type of synaptic interface utilizing synaptic cell adhesion molecules for biotic-abiotic

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Yamauchi, Akira, Yuji Yamauchi, Yuko Hirohata, Tomoaki Hino, and Kazuya Kurokawa. "TDS Measurement of Hydrogen Released from Stainless Steel Oxidized in H₂O-Containing Atmospheres." Materials Science Forum 522-523 (August 2006): 163–70. http://dx.doi.org/10.4028/www.scientific.net/msf.522-523.163.

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Hydrogen dissolved in the Cr2O3 scale formed on the stainless steel in the H2O-containing atmospheres is observed by TDS (thermal desorption spectroscopy) measurements. The amount of dissolved hydrogen in the Cr2O3 scale reaches a maximum about 0.32 mol% when the H2O concentration in the gas reaches 20%. It was found from GDS (glow discharge spectroscopy) measurements that hydrogen may exist at the oxide scale / substrate interface or in Cr2O3 scale bounded that interface. However, results from the Vickers hardness and the observation of scale morphology by SEM (scanning electron microscopy),

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15

Shu, Min-Fong, and Yi-Hsiu Tseng. "Copper Oxidation Effect in the EMC/Cu Interfacial Adhesion Improvement for a Novel Copper Interconnection Substrate Application." International Symposium on Microelectronics 2018, no. 1 (2018): 000161–66. http://dx.doi.org/10.4071/2380-4505-2018.1.000161.

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Abstract Copper oxidation structure, cupric oxide (CuO) and cuprous oxide (Cu2O), under Ar/H2 plasma reaction mechanism for the EMC/Cu interface adhesion improvement was studied in this work. This work is utilized TGA to figure out Cu oxidized state and sample preparation, and using plasma treatment Cu oxidation layer to evaluate the EMC/Cu interface adhesion strength by shear testing method. Results show a plasma reduction on Cu oxidation layer provide a better interface adhesion, and the layer structure has a significant composition change, Cu/Cu2O/CuO/EMC → Cu/Cu2O/CuO/Cu2O/EMC. These layer

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16

Jana, Achintya, Puneet Mishra, and Neeladri Das. "Polymorphic self-assembly of pyrazine-based tectons at the solution–solid interface." Beilstein Journal of Nanotechnology 10 (February 18, 2019): 494–99. http://dx.doi.org/10.3762/bjnano.10.50.

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Exploring the surface self-assembly of small molecules that act as building blocks (tectons) for complex supramolecular structures is crucial for realizing surface-supported functional molecular devices. Here, we report on the synthesis and surface self-assembly of a new pyrazine-derived molecule with pyridine pendants. Ambient scanning tunneling microscopy investigation at the solution–solid interface reveals polymorphic self-assembly of these molecules on a HOPG substrate. Two different molecular packing structures with equal distribution are observed. Detailed analysis of the STM images emp

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17

Zhang, Haojie, Juliana Martins de Souza e Silva, Cristine Santos de Oliveira, et al. "Optimization of Chemical Vapor Deposition Process for Carbon Nanotubes Growth on Stainless Steel: Towards Efficient Hydrogen Evolution Reaction." MRS Advances 5, no. 8-9 (2020): 363–68. http://dx.doi.org/10.1557/adv.2020.4.

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ABSTRACTWe report a novel strategy to render stainless steel (SS) a more versatile material that is suitable to be used as the substrate for preparing electrodes for efficient hydrogen evolution by interface engineering. Our strategy involves the growth of carbon nanotubes (CNTs) by atmospheric pressure chemical vapor deposition (APCVD) as the interface material on the surface of SS. We optimized the procedure to prepare CNTs/SS and demonstrate a higher activity of the CNTs/SS prepared at 700 °C for the hydrogen evolution reaction (HER) when compared to samples prepared at other temperatures.

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Zeng, Xiang Bo, Jin Yan Li, Xiao Bing Xie, et al. "Improvement of n/i Interface Layer Properties in Microcrystalline Silicon Solar Cell." Key Engineering Materials 537 (January 2013): 193–96. http://dx.doi.org/10.4028/www.scientific.net/kem.537.193.

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Properties of n-i interface are critical for hydrogenated microcrystalline silicon (μc-Si:H )substrate-type (n–i–p) solar cell as it affects carrier collection, which is visible in the red response . Here, we report a remarkable improvement in visible-infrared responses upon hydrogen plasma treatment （HPT）of n/i interface. We demonstrate that hydrogen plasma treatment in the initial stage of a μc-Si:H i layer growth affects the red response of μc-Si:H solar cell. At the optimal deposition condition, 18% higher short-circuit current density was obtained than its count part without using HPT

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19

Kim, J. Y., J. S. Hardy, and K. S. Weil. "High-temperature tolerance of the silver-copper oxide braze in reducing and oxidizing atmospheres." Journal of Materials Research 21, no. 6 (2006): 1434–42. http://dx.doi.org/10.1557/jmr.2006.0178.

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The silver-copper oxide–based reactive air brazing technique was developed as a method of joining complex-shaped ceramic parts. To investigate the viability of this approach for high-temperature application, a series of air-brazed alumina joints were independently exposed to either oxidizing or reducing atmosphere at 800 °C for 100 h. Those samples that were thermally aged in air maintained good joint strength, similar to that of the original as-brazed samples. Microstructural analysis revealed no significant change in joint microstructure after long-term oxidation at elevated temperature, ind

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Hirakata, Hiroyuki, Takeshi Yamada, Yoshiki Nobuhara, Akio Yonezu, and Kohji Minoshima. "Hydrogen effect on fracture toughness of thin film/substrate interfaces." Engineering Fracture Mechanics 77, no. 5 (2010): 803–18. http://dx.doi.org/10.1016/j.engfracmech.2009.11.011.

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21

De Obaldia, Elida, Pablo Tirado, Jesús Alcantar, Jorge Montes, and Orlando Auciello. "Photoluminescence in Raman Scattering: Effects of HfO2 Template Layer on Ultrananocrystalline Diamond (UNCD) Films Grown on Stainless Steel Substrates." KnE Engineering 3, no. 1 (2018): 263. http://dx.doi.org/10.18502/keg.v3i1.1441.

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The growth of polycrystalline diamond films can play an important role in industry if they can be grown on industrially used materials like aluminum (Al) or stainless steel (SS). A critical issue related to the growth of ultrananocrystalline diamond (UNCD) thin films on metals like SS, in a Hydrogen rich environment like the one present during growth of UNCD films, is the diffusion of Hydrogen (H) into the SS substrate, as it has been observed in prior research, which results in hydride formation in the SS that induce brittleness in the SS substrate. Several interface layers have been proposed

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22

Yurakov, Yury A., Yaroslav A. Peshkov, Evelina P. Domashevskaya, et al. "A study of multilayer nanostructures [(Co45Fe45Zr10)35(Al2O3)65/a-Si:H]100 and [(Co45Fe45Zr10)35(Al2O3)65/a-Si]120 by means of XRD, XRR, IR spectroscopy, and USXES." European Physical Journal Applied Physics 87, no. 2 (2019): 21301. http://dx.doi.org/10.1051/epjap/2019190131.

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Interatomic interactions and superstructures of multilayer nanostructures (MLNS) consisting of ferromagnetic composite layers and silicon interlayers with or without hydrogen are studied here by means of X-ray diffraction (XRD), X-ray reflectivity (XRR), IR spectroscopy, and ultra-soft X-ray emission spectroscopy (USXES). The MLNS [(Co45Fe45Zr10)35(Al2O3)65/a-Si:H]100 and [(Co45Fe45Zr10)35(Al2O3)65/a-Si]120 were deposited on the substrate Si(100) by ion-beam sputtering of two targets, where the first target was a plate of Co45Fe45Zr10 alloy with Al2O3 inserts, and the second target was a singl

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Tian, Ya-Ming, Wagner Silva, Ruth M. Gschwind, and Burkhard König. "Accelerated photochemical reactions at oil-water interface exploiting melting point depression." Science 383, no. 6684 (2024): 750–56. http://dx.doi.org/10.1126/science.adl3092.

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Water can accelerate a variety of organic reactions far beyond the rates observed in classical organic solvents. However, using pure water as a solvent introduces solubility constraints that have limited the applicability of efficient photochemistry in particular. We report here the formation of aggregates between pairs of arenes, heteroarenes, enamines, or esters with different electron affinities in an aqueous medium, leading to an oil-water phase boundary through substrate melting point depression. The active hydrogen atoms in the reactants engage in hydrogen bonds with water, thereby accel

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Yudkina, A. V., E. A. Kovalenko, A. V. Endutkin, et al. "Factors Affecting the Stability of the Trimer of 2'-deoxyuridine-5'-triphosphate Nucleotide Hydrolase from <i>Escherichia coli</i>." Молекулярная биология 57, no. 2 (2023): 330–39. http://dx.doi.org/10.31857/s0026898423020246.

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To prevent erroneous incorporation of dUMP into DNA from the dUTP metabolic pool, all living cells contain 2′-deoxyuridine-5′-triphosphate nucleotide hydrolase (Dut), an enzyme that hydrolyzes dUTP to dUMP and pyrophosphate. Dut is considered a promising pharmacological target for antimetabolite therapy. Enzymatically active Dut is a trimer that binds the substrate at the interface between the subunits. Here we use high-speed nanoscale differential scanning fluorometry (nanoDSF) to study how various physicochemical factors affect the stability of the E. coli Dut trimer. Unlike for monomeric pr

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Reddi, Ravikumar, Kiran Kumar Singarapu, Debnath Pal, and Anthony Addlagatta. "The unique functional role of the C–H⋯S hydrogen bond in the substrate specificity and enzyme catalysis of type 1 methionine aminopeptidase." Molecular BioSystems 12, no. 8 (2016): 2408–16. http://dx.doi.org/10.1039/c6mb00259e.

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Unique C–H⋯S hydrogen bonding interactions allow nature to attain recognition specificity between molecular interfaces where there is no apparent scope for classical hydrogen bonding or polar interactions.

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Mas-Vinyals, Anna, Joan Gilabert-Porres, Laura Figueras-Esteve, and Salvador Borrós. "Improving linking interface between collagen-based hydrogels and bone-like substrates." Colloids and Surfaces B: Biointerfaces 181 (September 2019): 864–71. http://dx.doi.org/10.1016/j.colsurfb.2019.06.046.

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Zhu, Wen, Peitang Zhao, Haiyan Lu, and Fangzhen Zuo. "Tudy on hydrogen release mechanism of package shell." Advances in Engineering Technology Research 1, no. 2 (2022): 382. http://dx.doi.org/10.56028/aetr.1.2.382.

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In this paper, the hydrogen release amount of SiC particle reinforced aluminum matrix composite (SiCp/Al) base plate, titanium alloy enclosure and its packaging shell was studied, the influence of substrate surface morphology on the hydrogen storage state of the coating was analyzed, and the hydrogen release mechanism of the packaging shell was discussed. The results show that the gold-plated SiCp/Al composite is the main source of hydrogen release from the package shell, and its complex surface morphology leads to different hydrogen storage states of the coating. At the early stage of baking,

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Zhu, Wen, Peitang Zhao, Haiyan Lu, and Fangzhen Zuo. "Tudy on hydrogen release mechanism of package shell." Advances in Engineering Technology Research 2, no. 1 (2022): 382. http://dx.doi.org/10.56028/aetr.2.1.382.

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In this paper, the hydrogen release amount of SiC particle reinforced aluminum matrix composite (SiCp/Al) base plate, titanium alloy enclosure and its packaging shell was studied, the influence of substrate surface morphology on the hydrogen storage state of the coating was analyzed, and the hydrogen release mechanism of the packaging shell was discussed. The results show that the gold-plated SiCp/Al composite is the main source of hydrogen release from the package shell, and its complex surface morphology leads to different hydrogen storage states of the coating. At the early stage of baking,

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Fukumoto, Michihisa, Kano Nakajima, and Hiroki Takahashi. "Formation of LaNi5 Hydrogen Storage Alloy by Electrodeposition of La Using Molten Salt." Coatings 12, no. 9 (2022): 1268. http://dx.doi.org/10.3390/coatings12091268.

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A hydrogen storage alloy was formed by electrodepositing La using a molten salt. La was electrodeposited using Ni as a substrate in NaCl-KCl-5.0 mol% LaF3 molten salt at electrodeposition temperatures of 750 °C and 900 °C. The electrodeposition potential was −2.25 V. The LaNi5 hydrogen storage alloy was then prepared by the electrodeposition of La and the mutual diffusion of the Ni substrate. As a result, it was clarified that La can be electrodeposited by using a molten salt. Single-phase LaNi5 was produced at 750 °C rather than at 900 °C. It became possible to uniformly form LaNi5, an interm

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Yasin, Liam, and Sam Cooper. "Quantifying Diffusion Across Solid-Solid Interfaces in Electrochemical Cells." ECS Meeting Abstracts MA2023-01, no. 38 (2023): 2280. http://dx.doi.org/10.1149/ma2023-01382280mtgabs.

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Enabling an increased rollout of hydrogen-based technologies requires decarbonisation of both hydrogen production and conversion. Solid Oxide Cells (SOCs), in the form of electrolysers and fuel cells, could play a significant role in achieving this, however lifetime and degradation of SOCs remain major obstacles to commercialisation. Understanding the mechanisms governing ionic transport in ceramics is important to improving the performance and durability of SOCs. Properties such as the oxygen tracer diffusivity, , can be measured by Isotopic Exchange Depth Profiling (IEDP) as developed by Kil

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Sadananda, Kuntimaddi, Jung Ho Yang, Nagaraja Iyyer, Nam Phan, and Anisur Rahman. "Sacrificial Zn–Ni coatings by electroplating and hydrogen embrittlement of high-strength steels." Corrosion Reviews 39, no. 6 (2021): 487–517. http://dx.doi.org/10.1515/corrrev-2021-0038.

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Abstract A review of sacrificial Zn–Ni electroplating coatings on high-strength steels is presented. These steels are used for heavy structural applications such as landing gears, etc., that are subjected to high stresses and corrosive environments in service. The electroplating process involving aqueous electrolytes invariably produces hydrogen. The emitted hydrogen can diffuse into substrate steel, contributing to the delayed failures by hydrogen embrittlement. Microstructural inhomogeneities arising from the heat treatments and defects produced during coatings and those inherently present i

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Haupt, Melina, Matthew P. Blakeley, Stuart J. Fisher, et al. "Binding site asymmetry in human transthyretin: insights from a joint neutron and X-ray crystallographic analysis using perdeuterated protein." IUCrJ 1, no. 6 (2014): 429–38. http://dx.doi.org/10.1107/s2052252514021113.

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Human transthyretin has an intrinsic tendency to form amyloid fibrils and is heavily implicated in senile systemic amyloidosis. Here, detailed neutron structural studies of perdeuterated transthyretin are described. The analyses, which fully exploit the enhanced visibility of isotopically replaced hydrogen atoms, yield new information on the stability of the protein and the possible mechanisms of amyloid formation. Residue Ser117 may play a pivotal role in that a single water molecule is closely associated with the γ-hydrogen atoms in one of the binding pockets, and could be important in deter

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Yu, Han, Qiaohong Xiao, Guilin Qi, et al. "A Hydrogen Bonds-Crosslinked Hydrogels With Self-Healing and Adhesive Properties for Hemostatic." Frontiers in Bioengineering and Biotechnology 10 (April 14, 2022). http://dx.doi.org/10.3389/fbioe.2022.855013.

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Hydrogels with adhesive properties have the potential for rapid haemostasis and wound healing in uncontrolled non-pressurized surface bleeding. Herein, a typical hydrogen bond-crosslinked hydrogel with the above functions was constructed by directly mixing solutions of humic acid (HA) and polyvinylpyrrolidone (PVP), in which the HA worked as a crosslinking agent to form hydrogen bonds with the PVP. By altering the concentration of HA, a cluster of stable and uniform hydrogels were prepared within 10 s. The dynamic and reversible nature of the hydrogen bonds gave the HA/PVP complex (HPC) hydrog

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Xu, Dan, Xintong Meng, Siyuan Liu, Jade Poisson, Philipp Vana, and Kai Zhang. "Dehydration regulates structural reorganization of dynamic hydrogels." Nature Communications 15, no. 1 (2024). http://dx.doi.org/10.1038/s41467-024-51219-7.

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AbstractThe dehydration process is widely recognized as a significant phenomenon in nature. Hydrogels, which are important functional materials with high water content and crosslinked networks, encounter the issue of dehydration in their practical applications. Here, we report the distinctive anisotropic dehydration modality of dynamic hydrogels, which is fundamentally different from the more commonly observed isotropic dehydration of covalent hydrogels. Xerogels derived from dynamic hydrogel dehydration will fully cover a curved substrate surface and exhibit hollow structures with internal kn

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Yi, Bo, Tianjie Li, Boguang Yang, et al. "Surface hydrophobization of hydrogels via interface dynamics-induced network reconfiguration." Nature Communications 15, no. 1 (2024). http://dx.doi.org/10.1038/s41467-023-44646-5.

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AbstractEffective and easy regulation of hydrogel surface properties without changing the overall chemical composition is important for their diverse applications but remains challenging to achieve. We report a generalizable strategy to reconfigure hydrogel surface networks based on hydrogel–substrate interface dynamics for manipulation of hydrogel surface wettability and bioadhesion. We show that the grafting of hydrophobic yet flexible polymeric chains on mold substrates can significantly elevate the content of hydrophobic polymer backbones and reduce the presence of polar groups in hydrogel

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Perez, Edward, Linda G. Cima, David Miller, and Edward W. Merrill. "Bilayer Composite Hydrogels for Corneal Prostheses." MRS Proceedings 252 (1991). http://dx.doi.org/10.1557/proc-252-375.

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ABSTRACTA two-layer composite material composed of a thin-layer of corneal tissue and a synthetic polyethylene oxide (PEO) hydrogel is described. The material is designed to provide a suitable substrate for corneal epithelial cell growth while maintaining the desirable characteristics of hydrogels, i.e. clarity, flexibility, and ability to allow diffusive flow of nutrients. The gels are synthesized via electron irradiation induced crosslinking of an aqueous solution of PEO onto a thin layer of collagenous tissue substrate. light microscopic studies indicate that the interface between the corne

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Yates, Heather M., and John O. Williams. "Metal Organic Chemical Vapour Deposition Growth of Epitaxial ZnSe/ZnS Multiple Layered Structures." MRS Proceedings 102 (1987). http://dx.doi.org/10.1557/proc-102-137.

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ABSTRACTZnSe-ZnS multilayers have been prepared by atmospheric. pressure metal organic chemical vapour deposition (M0CVD) using dimethylzinc, hydrogen sulphide and hydrogen selenide. Layer thicknesses down to 500Å have been obtained and the interfaces, as measured by secondary ion mass spectroscopy (SIMS) and electron microscopy, are regular. A notable improvement in interface abruptness was observed with better control of experimental procedures and more especially with the growth of a ZnSe buffer layer between the GaAs(100) substrate and multilayers.

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Wen, Zhixuan, Teng Zhou, Qian Xu, et al. "Functional hydrogel-plastic hybrids inspired by the structural characteristics of mussels." NPG Asia Materials 15, no. 1 (2023). http://dx.doi.org/10.1038/s41427-023-00491-y.

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AbstractShellfish with rigid shells prevent damage to their delicate internal cores, and their soft bonding muscles drive the opening and closing of the shells. This synergism of rigid and soft materials provides shellfish with unique environmental adaptation. Inspired by the structural characteristics of mussels, a riveting layer was introduced into hydrogel-plastic hybrids for bonding hydrogel networks and plastic substrates. The bonding strength of the hydrogel on the polypropylene (PP) substrate was approximately 1.52 MPa, and the interface toughness reached 1450 J m−2. Furthermore, the in

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Ren, Xingrong, Jiayi Zhang, Fan Yang, Hong Xu, Gaoyang Guo, and Yunbing Wang. "Enzyme‐Immobilized Surface‐Catalyzed Cross‐Linking: Creating Multifunctional Double Network Hydrogel Coatings on Diverse Substrates." Advanced Functional Materials, March 7, 2024. http://dx.doi.org/10.1002/adfm.202312465.

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AbstractHydrogel coatings, with natural tissue‐like mechanical and biological compatibility, demonstrate promise for bulk material applications. However, existing coating methods lack efficiency and control, especially when dealing with complex geometries, diverse substrate materials, and varying sizes. In this study, an enzyme‐immobilized surface‐catalyzed cross‐link approach is proposed for the growth of hydrogel coatings on multiple substrates, accommodating various materials and shapes. The hydrogel coating is formed through the catalytic action of interface‐immobilized enzymes, which indu

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Fukuda, K., K. Sakamoto, K. Nagai, T. Sekigawa, S. Yoshida, and K. Arai. "A Formation of SiO2/4H-SiC Interface by Oxidizing Deposited Poly-Si and High Temperature Hydrogen Annealing." MRS Proceedings 572 (1999). http://dx.doi.org/10.1557/proc-572-105.

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ABSTRACTA formation of SiO2/4H-SiC interfaces by oxidizing deposited poly-Si on a 4H-SiC substrate and high temperature hydrogen annealing at low pressure ( 8.5×102 Pa ) has been investigated. The oxidation rate of deposited poly-Si was approximately 100 times faster than that of a SiC. Hydrogen annealing more effectively reduced the flat band voltage shift ( ΔVfb ) of the 4H-SiC MOS structure than argon and vacuum annealing. Moreover, the good SiO2/4H-SiC interface was formed because ΔVfb decreased as the oxidation temperature increased.

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Zhang, Xiaoxiang, Yuxuan Guo, and Congwei Wang. "Multi-interface engineering of nickel-based electrocatalysts for alkaline hydrogen evolution reaction." Energy Materials, 2024. http://dx.doi.org/10.20517/energymater.2023.115.

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High gravimetric energy density and zero carbon emission of hydrogen have motivated hydrogen energy to be an attractive alternative to fossil fuels. Electrochemical water splitting in alkaline medium, driven by green electricity from renewable sources, has been mentioned as a potential solution for sustainable hydrogen production. Hydrogen evolution reaction (HER), as a cathodic half-reaction of water splitting, requires additional overpotential to obtain protons via water adsorption/dissociation, suffering from slow kinetics in alkaline solution. Robust and active nickel (Ni)-based electrocat

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Dong, Changxin, Andrea I. d'Aquino, Samya Sen, et al. "Water‐Enhancing Gels Exhibiting Heat‐Activated Formation of Silica Aerogels for Protection of Critical Infrastructure During Catastrophic Wildfire." Advanced Materials, August 21, 2024. http://dx.doi.org/10.1002/adma.202407375.

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AbstractA promising strategy to address the pressing challenges with wildfire, particularly in the wildland‐urban interface (WUI), involves developing new approaches for preventing and controlling wildfire within wildlands. Among sprayable fire‐retardant materials, water‐enhancing gels have emerged as exceptionally effective for protecting civil infrastructure. They possess favorable wetting and viscoelastic properties that reduce the likelihood of ignition, maintaining strong adherence to a wide array of surfaces after application. Although current water‐enhancing hydrogels effectively mainta

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Newham, George, Joseph Fox, Samuel CT Moorcroft, and Stephen D. Evans. "Enzymatic and Catalytic Behaviour of Low-Dimensional Gold Nanomaterials in Modular Nano-composite Hydrogels." Materials Research Express, June 6, 2023. http://dx.doi.org/10.1088/2053-1591/acdc05.

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Abstract Inorganic nanoparticles have long been applied as catalysts and nanozymes with exceptional rate constants arising from their large surface areas. While it is understood that high surface area-to-volume ratios and low average atomic coordination are responsible for their exceptional catalytic properties, these facets remain under exploited in the design of gold nanoparticle catalysts and nanozymes. Here we have developed 3D, 2D, and quasi-1D gold nanoparticles for use as catalysts in reducing 4-nitrophenol by sodium borohydride. Each morphology was characterised with transmission elect

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Wei, Congying, Chuangqi Zhao, Yunfei Ru, et al. "Superspreading of Polyelectrolyte Complex Solution for Constructing Hydrogel Coatings on Diverse Substrates." Advanced Functional Materials, April 9, 2024. http://dx.doi.org/10.1002/adfm.202400581.

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AbstractInjectable hydrogels have emerged as versatile materials with potential applications in various fields, including biomedicine, lubrication, adhesion, surface coatings, and tissue engineering. However, the critical aspect of spreading and wetting on various substrates, which is essential for obtaining significant interfacial properties, has not been adequately addressed. This work presents an approach to prepare hydrogel coatings on kinds of substrates through the superspreading of polyelectrolyte complex solution during its liquid‐liquid phase inversion process. Due to the low interfac

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Macalester, William, Asme Boussahel, Rafael O. Moreno-Tortolero, et al. "A 3D In-vitro model of the human dentine interface shows long-range osteoinduction from the dentine surface." International Journal of Oral Science 16, no. 1 (2024). http://dx.doi.org/10.1038/s41368-024-00298-9.

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AbstractEmerging regenerative cell therapies for alveolar bone loss have begun to explore the use of cell laden hydrogels for minimally invasive surgery to treat small and spatially complex maxilla-oral defects. However, the oral cavity presents a unique and challenging environment for in vivo bone tissue engineering, exhibiting both hard and soft periodontal tissue as well as acting as key biocenosis for many distinct microbial communities that interact with both the external environment and internal body systems, which will impact on cell fate and subsequent treatment efficacy. Herein, we de

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Li, Min, Honglang Lu, Menghan Pi, et al. "Water‐Induced Phase Separation for Anti‐Swelling Hydrogel Adhesives in Underwater Soft Electronics." Advanced Science, September 26, 2023. http://dx.doi.org/10.1002/advs.202304780.

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AbstractThe development of hydrogel‐based underwater electronics has gained significant attention due to their flexibility and portability compared to conventional rigid devices. However, common hydrogels face challenges such as swelling and poor underwater adhesion, limiting their practicality in water environments. Here, a water‐induced phase separation strategy to fabricate hydrogels with enhanced anti‐swelling properties and underwater adhesion is presented. By leveraging the contrasting affinity of different polymer chains to water, a phase‐separated structure with rich hydrophobic and di

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Drevillon, B. "In Situ Monitoring of Interfaces and Growth of Amorphous Silicon by Spectroellipsometry." MRS Proceedings 258 (1992). http://dx.doi.org/10.1557/proc-258-3.

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ABSTRACTRecent applications of spectroscopie phase modulated ellipsometry, from 0.25 to 11 μm, to study the growth of plasma deposited thin film semiconductors like amorphous (a-Si:H) silicon are reviewed. The high sensitivity of this technique is emphasized. In the infrared (IR), the hydrogen incorporation during a-Si:H growth can be precisely investigated. Photoelectronic quality a-Si:H films grow beneath a hydrogen rich overlayer (a few monolayers thick) containing SiH2. the hydrogen being bonded as SiH in the bulk material. In the ultraviolet (UV) range, the ability of kinetic ellipsometry

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Liu, Ming, Guanghu Yao, Xuehan Wang, et al. "Coupling Effect of Precipitates and Hydrogen on Pitting Corrosion of Stainless Steel." CORROSION, June 12, 2024. http://dx.doi.org/10.5006/4549.

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Abstract This study investigated the coupling effect of hydrogen and precipitates on the initiation of pitting using HR3C stainless steel with large NbCrN precipitates as the study material. Stainless steel exhibited good resistance to pitting when not subject to hydrogen charging. Hydrogen charging significantly reduced the corrosion resistance and stability of the passive film. Results obtained using the hydrogen microprint technique revealed that hydrogen was enriched within NbCrN precipitates and along the precipitate–substrate interface. Through immersion experiments, we discovered that p

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Berti, G., C. G. Torres-Castanedo, D. P. Goronzy, et al. "Scanning tunneling microscopy and spectroscopy characterization of Nb films for quantum applications." Applied Physics Letters 122, no. 19 (2023). http://dx.doi.org/10.1063/5.0145090.

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Niobium thin films are key components of superconducting microwave resonators. Interest in these devices has increased dramatically because of their application in quantum systems. Despite tremendous effort to improve their performance, loss mechanisms are still not well understood. Nb/substrate and Nb/air interfaces are likely culprits in contributing to decoherence and ultimately limiting the performance of superconducting devices. Here, we investigate the Nb/substrate interface by studying the effect of hydrogen-passivated H:Si(111) substrates on the local superconducting properties of ∼40

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Matsumura, Mikiya, Takahisa Tanaka, and Ken UCHIDA. "Experimental study on shallow and deep dopant properties at the interface of PtO_x/ZnO Schottky diodes." Japanese Journal of Applied Physics, February 14, 2022. http://dx.doi.org/10.35848/1347-4065/ac54f3.

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Abstract The donor properties at the interface of the PtOx/ZnO Schottky diodes on hydrothermally grown ZnO were investigated. From the capacitance-voltage (C-V) characteristics of the diode and Hall effect measurements of the bulk substrate, we revealed that the carrier concentration at the ZnO Schottky diodes interface is much higher than that in the bulk. By utilizing the C-V characteristics and the deep level transient spectroscopy (DLTS), we demonstrated that the interfaces have two kinds of ionized donors; the shallow and deep donors, whose activation energies were 4 meV and 0.33 eV, resp

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