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Benkhira I, Zermane F, Cheknane B, Trache D, Brosse N, Paolone A, Chader H, Sobhi W. Preparation and characterization of amidated pectin-gelatin-oxidized tannic acid hydrogel films supplemented with in-situ reduced silver nanoparticles for wound-dressing applications. Int J Biol Macromol 2024; 277:134158. [PMID: 39059528 DOI: 10.1016/j.ijbiomac.2024.134158] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2023] [Revised: 07/13/2024] [Accepted: 07/23/2024] [Indexed: 07/28/2024]
Abstract
Wound dressings play a crucial role in protecting injured tissues and promoting the healing process. Traditional fabrication of antibacterial wound dressings can be complex and may involve toxic components. In this study, we developed an innovative hydrogel film (AP:GE@OTA/Ag) composed of amidated pectin (AP), gelatin (GE), oxidized tannic acid (OTA) at varying concentrations, and in-situ reduced silver nanoparticles (AgNPs). FTIR and XRD analyses confirmed that crosslinking occurs via interactions between OTA quinone groups and free amino groups in AP and GE. TEM imaging demonstrated the well-dispersed AgNPs with an average particle size of 58.64 nm, while the TG measurements indicated the enhancement of the thermal stability compared to AP:GE films. The AP:GE@OTA/Ag films exhibited superior fluid uptake ability (90.96 % at 2 h), water retention capacity (91.69 % at 2 h), and water vapor transmission rate (1903.29 g/m2/day), alongside improved tensile strength (38 MPa). Additionally, these films showed excellent cytocompatibility and sustained potent antimicrobial activity against S. aureus and E. coli with low AgNPs loadings of 1.02 ± 0.13 μg/cm2. NIT-1 mouse insulinoma cells demonstrated robust proliferation when cultured with the prepared dressings. These films significantly accelerated wound repair in a skin excision model, indicating their potential clinical applications for wound healing.
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Affiliation(s)
- Ilyas Benkhira
- Laboratoire Chimie Physique Des Interfaces Des Matériaux Appliqués à l'Environnement, Département de Génie Des Procédés, Université Saad Dahlab Blida 1, 09000 Blida, Algeria.
| | - Faiza Zermane
- Laboratoire Chimie Physique Des Interfaces Des Matériaux Appliqués à l'Environnement, Département de Génie Des Procédés, Université Saad Dahlab Blida 1, 09000 Blida, Algeria
| | - Benamar Cheknane
- Laboratoire Chimie Physique Des Interfaces Des Matériaux Appliqués à l'Environnement, Département de Génie Des Procédés, Université Saad Dahlab Blida 1, 09000 Blida, Algeria
| | - Djalal Trache
- Energetic Materials Laboratory (EMLab), Teaching and Research Unit of Energetic Processes, Polytechnic Military School, BP 17, Bordj El-Bahri, 16046 Algiers, Algeria
| | - Nicolas Brosse
- LERMAB, Faculty of Science and Technology, University of Lorraine, Vandoeuvre-Les-Nancy, 54506, France
| | - Annalisa Paolone
- Istituto dei Sistemi Complessi, Consiglio Nazionale delle Ricerche, Piazzale A. Moro 5, I-00185 Rome, Italy
| | - Henni Chader
- Department of Pharmacy, Faculty of Medicine, University of Algiers 1, Algiers 16001, Algeria
| | - Widad Sobhi
- Research Center of Biotechnology (CRBt), Constantine 25000, Algeria
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Gong JM, Khan MSS, Da B, Yoshikawa H, Tanuma S, Ding ZJ. A theoretical characterization method for non-spherical core-shell nanoparticles by XPS. Phys Chem Chem Phys 2023; 25:20917-20932. [PMID: 37492028 DOI: 10.1039/d3cp01413d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/27/2023]
Abstract
Core-shell nanoparticles (NPs) are active research areas for their unique properties and wide applications. By changing the elemental composition in the core and shell, a series of core-shell NPs with specific functions can be obtained, where the sizes of the core and shell also influence the properties. X-ray photoelectron spectroscopy (XPS) is useful in this context as a means of quantitatively analyzing such NPs. The empirical formula proposed by Shard [J. Phys. Chem. C, 2012, 116(31), 16806-16813] for calculating the shell thickness of the spherical core-shell NPs has been verified by Powell et al. [J. Phys. Chem. C, 2016, 120(39), 22730-22738] through a simulation of XPS with Simulation of Electron Spectra for Surface Analysis (SESSA) software. However, real core-shell NPs are not necessarily ideal spheres; such NPs can have rich shapes and uneven thicknesses. This work aims to extend the Shard formula to non-ideal core-shell NPs. We have used a Monte Carlo simulation method to study the XPS signal variation with the shell thickness for several modeled non-spherical shapes of core-shell NPs including some complex geometric structures which are numerically constructed with finite-element triangular meshes. Five types of non-spherical shapes, i.e. egg, ellipsoid, rod, rough-surface, and star shapes, are considered, while the size parameters are varied over a wide range. The equivalent radius and equivalent thickness are defined to characterize the average size of the nanoparticles for the use of the Shard formula. We have thus derived an extended Shard formula for the specific core-shell NPs, with which the relative error between the predicted shell thickness and the real thickness can be reduced to less than 10%.
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Affiliation(s)
- J M Gong
- Department of Physics, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China.
- Center for Basic Research on Materials, National Institute for Materials Science, Tsukuba, Ibaraki 305-0044, Japan.
- Materials Data Platform Center, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
| | - M S S Khan
- Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei, Anhui 230031, People's Republic of China
| | - B Da
- Center for Basic Research on Materials, National Institute for Materials Science, Tsukuba, Ibaraki 305-0044, Japan.
| | - H Yoshikawa
- Center for Basic Research on Materials, National Institute for Materials Science, Tsukuba, Ibaraki 305-0044, Japan.
| | - S Tanuma
- Materials Data Platform Center, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
| | - Z J Ding
- Department of Physics, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China.
- Hefei National Research Center for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
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Ko T, Kumar S, Shin S, Seo D, Seo S. Colloidal Quantum Dot Nanolithography: Direct Patterning via Electron Beam Lithography. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:2111. [PMID: 37513122 PMCID: PMC10384559 DOI: 10.3390/nano13142111] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Revised: 07/18/2023] [Accepted: 07/18/2023] [Indexed: 07/30/2023]
Abstract
Micro/nano patterns based on quantum dots (QDs) are of great interest for applications ranging from electronics to photonics to sensing devices for biomedical purposes. Several patterning methods have been developed, but all lack the precision and reproducibility required to fabricate precise, complex patterns of less than one micrometer in size, or require specialized crosslinking ligands, limiting their application. In this study, we present a novel approach to directly pattern QD nanopatterns by electron beam lithography using commercially available colloidal QDs without additional modifications. We have successfully generated reliable dot and line QD patterns with dimensions as small as 140 nm. In addition, we have shown that using a 10 nm SiO2 spacer layer on a 50 nm Au layer substrate can double the fluorescence intensity compared to QDs on the Au layer without SiO2. This method takes advantage of traditional nanolithography without the need for a resist layer.
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Affiliation(s)
- Taewoo Ko
- Department of Electronics and Information Engineering, Korea University, Sejong 30019, Republic of Korea
| | - Samir Kumar
- Department of Electronics and Information Engineering, Korea University, Sejong 30019, Republic of Korea
| | - Sanghoon Shin
- Department of Electronics and Information Engineering, Korea University, Sejong 30019, Republic of Korea
| | - Dongmin Seo
- Department of Electrical Engineering, Semyung University, Jecheon 27136, Republic of Korea
| | - Sungkyu Seo
- Department of Electronics and Information Engineering, Korea University, Sejong 30019, Republic of Korea
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Liu X, Lu D, Hou Z, Nagata K, Da B, Yoshikawa H, Tanuma S, Sun Y, Ding Z. Establishment and validation of an electron inelastic mean free path database for narrow bandgap inorganic compounds with a machine learning approach. Phys Chem Chem Phys 2023. [PMID: 37376953 DOI: 10.1039/d2cp04393a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/29/2023]
Abstract
Narrow bandgap inorganic compounds are extremely important in many areas of physics. However, their basic parameter database for surface analysis is incomplete. Electron inelastic mean free paths (IMFPs) are important parameters in surface analysis methods, such as electron spectroscopy and electron microscopy. Our previous research has presented a machine learning (ML) method to describe and predict IMFPs from calculated IMFPs for 41 elemental solids. This paper extends the use of the same machine learning method to 42 inorganic compounds based on the experience in predicting elemental electron IMFPs. The in-depth discussion extends to including material dependence discussion and parameter value selections. After robust validation of the ML method, we have produced an extensive IMFP database for 12 039 narrow bandgap inorganic compounds. Our findings suggest that ML is very efficient and powerful for IMFP description and database completion for various materials and has many advantages, including stability and convenience, over traditional methods.
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Affiliation(s)
- Xun Liu
- Department of Physics, University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China.
- Center for Basic Research on Materials, National Institute for Materials Science, Tsukuba, Ibaraki 305-0044, Japan.
| | - Dabao Lu
- Department of Physics, University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China.
- Center for Basic Research on Materials, National Institute for Materials Science, Tsukuba, Ibaraki 305-0044, Japan.
| | - Zhufeng Hou
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, China
| | - Kenji Nagata
- Center for Basic Research on Materials, National Institute for Materials Science, Tsukuba, Ibaraki 305-0044, Japan.
| | - Bo Da
- Center for Basic Research on Materials, National Institute for Materials Science, Tsukuba, Ibaraki 305-0044, Japan.
| | - Hideki Yoshikawa
- Center for Basic Research on Materials, National Institute for Materials Science, Tsukuba, Ibaraki 305-0044, Japan.
| | - Shigeo Tanuma
- Research Network and Facility Services Division, National Institute for Materials Science, Tsukuba, Ibaraki 305-0044, Japan
| | - Yang Sun
- Department of Physics, Xiamen University, Xiamen, Fujian 361-005, China
| | - Zejun Ding
- Department of Physics, University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China.
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Chen H, Zou Y, Mao S, Khan MSS, Tőkési K, Ding ZJ. Influence of energy loss function to the Monte Carlo simulated electron backscattering coefficient. Sci Rep 2022; 12:18201. [PMID: 36307500 DOI: 10.1038/s41598-022-20466-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2022] [Accepted: 09/13/2022] [Indexed: 11/09/2022] Open
Abstract
We report an improved calculation of the electron backscattering coefficients (BSCs) for beryllium, molybdenum and tungsten at electron energies of 0.1-100 keV based on an up-to-date Monte Carlo simulation method with different input of energy loss function (ELF) data. The electron inelastic cross-section is derived from the relativistic dielectric functional formalism, where the full Penn's algorithm is applied for the extension of the ELF from the optical limit of [Formula: see text] into the [Formula: see text]-plane. We have found that the accuracy of energy loss function may affect largely the calculated BSC. We also show that this has close relationship with the f- and ps-sum rules.
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Affiliation(s)
- Haotian Chen
- Department of Physics, University of Science and Technology of China, Hefei, 230026, Anhui, People's Republic of China
| | - Yanbo Zou
- School of Physics & Electronic Engineering, Xinjiang Normal University, Urumchi, 830054, Xinjiang, People's Republic of China
| | - Shifeng Mao
- Department of Nuclear Science and Engineering, University of Science and Technology of China, Hefei, 230026, Anhui, People's Republic of China.
| | - M S S Khan
- Hefei National Research Center for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, 230026, Anhui, People's Republic of China
| | - Károly Tőkési
- Institute for Nuclear Research (ATOMKI), Debrecen, EU, Hungary.
| | - Z J Ding
- Department of Physics, University of Science and Technology of China, Hefei, 230026, Anhui, People's Republic of China. .,Hefei National Research Center for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, 230026, Anhui, People's Republic of China.
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