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Bone tissue engineering application of 3-aminopropyltrimethoxysilane functionalized Au/Ag bimetallic nanoparticles incorporated hydroxyapatite bioceramic 骨组织工程应用3-氨基丙基三甲氧基硅烷功能化金/银双金属纳米颗粒掺入羟基磷灰石生物陶瓷
IF 0.8 4区 材料科学 Q4 METALLURGY & METALLURGICAL ENGINEERING Pub Date : 2023-08-17 DOI: 10.1557/s43578-023-01132-4
M. Pandey, Aloke Verma, P. Pandey, R. Narayan
Despite having excellent osteoconductivity and biocompatibility, hydroxyapatite (HA) exhibits inadequate mechanical properties and bacterial susceptibility, which limits its medical applications. The present study aims to fabricate 3-aminopropyltrimethoxysilane (3-APTMS) functionalized gold (Au)-silver (Ag) nanoparticles incorporated in hydroxyapatite bioceramics to overcome this limitation. Thermogravimetric analysis (TGA), X-Ray diffraction, and scanning electron microscopy were carried out to understand the physical and chemical characteristics of the material. The maximum values of fracture toughness, hardness, compressive and flexural strength were measured for HA-10 Au/Ag NPs. Both quantitative and qualitative analyses of antibacterial behavior revealed that the adhesion of gram-positive (Staphylococcu aureus) and gram-negative (Eschericia coli) bacterial cells were reduced significantly after the incorporation of Au/Ag NPs as compared with the HA control. In addition, the effect of Au/Ag NPs incorporation on the cellular response was observed for the MG63 cell line. Both the quantitative and qualitative results indicate significantly enhanced cell proliferation with the incorporation of Au/Ag NPs as compared to HA. The addition of Au/Ag NPs in HA provides a material with appropriate mechanical, antibacterial, and cellular responses for further consideration.
尽管羟基磷灰石(HA)具有良好的骨导电性和生物相容性,但其机械性能和细菌敏感性不足,限制了其医学应用。本研究旨在制备3-氨基丙基三甲氧基硅烷(3-APTMS)功能化金(Au)银(Ag)纳米颗粒,并将其掺入羟基磷灰石生物陶瓷中以克服这一限制。通过热重分析(TGA)、x射线衍射和扫描电镜分析了解材料的物理和化学特性。测定了HA-10 Au/Ag NPs的断裂韧性、硬度、抗压强度和抗弯强度的最大值。定量和定性抗菌行为分析显示,与HA对照相比,加入Au/Ag NPs后,革兰氏阳性(金黄色葡萄球菌)和革兰氏阴性(大肠杆菌)细菌细胞的粘附能力显著降低。此外,我们还观察了Au/Ag NPs掺入对MG63细胞系细胞反应的影响。定量和定性结果均表明,与HA相比,Au/Ag NPs的掺入显著增强了细胞增殖。在HA中添加Au/Ag NPs提供了一种具有适当的机械,抗菌和细胞反应的材料,供进一步研究。
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引用次数: 0
Comprehensive creep-pore diffusional growth calculations vs. previous approximations 综合蠕变-孔隙扩散增长计算与以前的近似
IF 0.8 4区 材料科学 Q4 METALLURGY & METALLURGICAL ENGINEERING Pub Date : 2023-08-16 DOI: 10.1557/s43578-023-01134-2
K. Davanas
Brittle rupture—via nucleation/growth/interconnection of grain-boundary (g.b.) creep pores—is a major cause of failure for materials not-resisting creep (e.g., through precipitation); and, the prediction of the relevant rupture-time with its dependency on stress/temperature/etc. represents a major challenge. Due to mathematical complexity, previous pore-growth calculations contain simplifications with indeterminable errors. Some calculations utilize 1-D (g.b.-vacancy) diffusional models having multi-sized/multi-spaced (‘infinitely’) long-parallel cylinders/pores instead of real-world spheroids (i.e., allowing for diffusion only between closest-neighbors). Other calculations utilize realistic 2-D g.b.-diffusional models but of equi-sized/equi-spaced spheroidal pores (hence ignoring ripening/coalescence); or, of just a couple of configurations of non-uniform/randomly spaced/spheroidal pores (thus not allowing for reliable statistics). Herein, the use of an innovative simulation-technique permits the examination of hundreds of complicated configurations with exceptionally low (w.r.t. the literature) computer-resource-expenditure, leading to proper adjustment/correction of all previous relevant 1-D/2-D works, making their results ‘real-world’ (on major issues, i.e., creep-rupture-time estimations and dependencies on stress/temperature/etc.).
脆性断裂——通过晶界(g.b)蠕变孔隙的成核/生长/互连——是材料不抗蠕变(例如,通过沉淀)失效的主要原因;并对断裂时间与应力、温度等参数的关系进行了预测。这是一个重大挑战。由于数学上的复杂性,以前的孔隙生长计算包含了带有无法确定误差的简化。一些计算利用一维(g.b.s空位)扩散模型,具有多尺寸/多间距(“无限”)长平行圆柱体/孔,而不是现实世界的球体(即,只允许在最近邻之间扩散)。其他计算利用现实的二维g.b.s扩散模型,但等大小/等间距的球形孔隙(因此忽略成熟/聚结);或者,只是一些非均匀/随机间隔/球形孔隙的配置(因此不允许可靠的统计)。在这里,使用一种创新的模拟技术,可以以极低的计算机资源消耗来检查数百种复杂的配置,从而对之前所有相关的1-D/2-D工作进行适当的调整/校正,使其结果“真实”(在主要问题上,即蠕变-破裂时间估计和对应力/温度等的依赖)。
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引用次数: 0
Investigation of microstructure and optical characteristics of Ti-doped ZnO thin films as an effective solar collector in photovoltaic solar cell applications using digitally controlled spray pyrolysis 采用数字控制喷雾热解技术研究ti掺杂ZnO薄膜作为光伏太阳能电池中有效集热器的微观结构和光学特性
IF 0.8 4区 材料科学 Q4 METALLURGY & METALLURGICAL ENGINEERING Pub Date : 2023-08-16 DOI: 10.1557/s43578-023-01133-3
Ayodele Nicholas Orelusi, V. A. Owoeye, J. Dada, Ayodeji Olalekan Salau, H. Boyo, S. Adewinbi
Renewable energy, especially solar energy is a viable solution to the lack of electricity. In recent times, it has become necessary to replace solar cells with organic and inorganic metal oxides with significant band gaps to enhance their properties. This study utilizes a designed digitally controlled spray pyrolysis technique at a steady temperature of 350 °C to deposit undoped ZnO and Ti-doped ZnO films on pre-heated ultrasonically cleaned soda lime glass substrates. The films exhibit a single-phase hexagonal wurtzite ZnO structure, according to the X-ray diffractometer analysis. The UV–visible Spectrophotometry results demonstrate that Ti-doped ZnO exhibits high transparency in the range of 71–91% and a direct band gap ranging from 3.24 to 3.10 eV. The results indicate that at 6%, Ti-doped ZnO has the potential to be used as a buffer material and window layer in thin-film solar cells.
可再生能源,尤其是太阳能是解决电力短缺的可行方案。近年来,为了提高太阳能电池的性能,有必要用具有明显带隙的有机和无机金属氧化物代替太阳能电池。本研究采用设计的数字控制喷雾热解技术,在350℃的稳定温度下,将未掺杂的ZnO和掺钛的ZnO薄膜沉积在超声清洗的预加热钠石灰玻璃基板上。根据x射线衍射仪分析,薄膜表现为单相六方纤锌矿ZnO结构。紫外可见分光光度法结果表明,ti掺杂ZnO具有71 ~ 91%的高透明度和3.24 ~ 3.10 eV的直接带隙。结果表明,当掺钛量为6%时,ZnO具有作为薄膜太阳能电池缓冲材料和窗口层的潜力。
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引用次数: 1
Compressive failure mechanism of sintered nano-silver 烧结纳米银的压缩破坏机理
IF 0.8 4区 材料科学 Q4 METALLURGY & METALLURGICAL ENGINEERING Pub Date : 2023-08-16 DOI: 10.1557/s43578-023-01135-1
Gonggiang He, Hongcun Guo, Shujin Li, Junwen Zhou, Yao Yao
As a promising packaging material for the third-generation semiconductor, the compressive behavior and failure mechanism of sintered nano-silver are vital for the reliability of packaging structure, which were investigated experimentally and numerically in the current study. The rate-dependent properties and microstructure evolution were determined by compression experiments under five loading rates at room temperature. Microscopically, the voids in the sintered nano-silver exhibit multi-scale distribution under specific sintering conditions, the corresponding failure mechanism is clarified by finite element analysis and scanning electron microscopy. Furthermore, a yield strength model with different porosity was proposed, which was adopted in the finite element analysis to investigate the microstructure evolution of sintered nano-silver. Eventually, the multi-scale simulation of the failure realized through the finite element model, the stress state of microstructure and the failure mechanism that is dependent on the multi-stage void were confirmed by the numerical simulation and experimental analysis. Microstructure of fracture section of sintered nano-silver: (a) morphology of Type I voids; (b) void closure of Type II voids; (c) compressive failure; (d) crack on the wall of Type I voids; (e) deformation of masonry-liked structure; (f) interfacial failure of Type II voids; (g) deformed void wall of Type I voids; (h) shear failure of sintered neck; (i) tensile failure of sintered neck; (j) Schematic diagram of compressive failure; (k) schematic diagram of shear fracture; (l) schematic diagram of tensile failure
烧结纳米银作为一种极具发展前景的第三代半导体封装材料,其压缩性能和失效机理对封装结构的可靠性至关重要,本文对其进行了实验和数值研究。通过五种加载速率下的室温压缩实验,确定了材料的速率相关性能和微观结构演化。微观上,烧结纳米银的孔隙在特定烧结条件下呈现多尺度分布,通过有限元分析和扫描电镜分析明确了相应的破坏机制。建立了不同孔隙率下的屈服强度模型,并采用该模型对烧结纳米银的微观结构演化进行了有限元分析。最后,通过有限元模型实现了对破坏的多尺度模拟,通过数值模拟和实验分析确定了微观组织的应力状态以及依赖于多段空洞的破坏机制。烧结纳米银断口形貌:(a) I型孔洞形貌;(b) II型孔洞的孔洞封闭;(c)压缩破坏;(d)ⅰ型孔洞壁面裂缝;(e)类砖石结构变形;(f) II型空洞界面破坏;(g) I型孔洞的变形孔壁;(h)烧结颈剪切破坏;(i)烧结颈的拉伸破坏;(j)压缩破坏示意图;(k)剪切断裂示意图;(l)拉伸破坏示意图
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引用次数: 0
Effect of laser energy density on surface morphology, microstructure and mechanical behaviour of direct metal laser melted 17-4 PH stainless steel 激光能量密度对直接金属激光熔化17-4 PH不锈钢表面形貌、显微组织和力学行为的影响
IF 0.8 4区 材料科学 Q4 METALLURGY & METALLURGICAL ENGINEERING Pub Date : 2023-08-16 DOI: 10.1515/ijmr-2022-0242
Shaun S Kumar, P. D. Babu
Abstract The surface and microstructural characteristics of 3D printed parts play a significant role under mechanical loading. The authors have explored the effect of laser energy densities on the surface morphology, microstructure and mechanical behaviour of 17-4 precipitation hardened stainless steel fabricated under the direct metal laser melting technique. The considered processing parameters were laser energy density and its technical parameters: laser power, layer thickness, hatch spacing and scanning speed. The mechanical and metallurgical properties of the as-printed samples appeared better than the wrought counterpart due to the higher densification level (99.74 %) induced by the rotating scanning strategy. X‐ray diffraction revealed the presence of both the martensitic α phase and austenitic γ phase in the as-printed sample. There is no significant anisotropy in the mechanical behaviour as the build direction has a random texture with a fine columnar grain structure. The high laser energy density with low layer thickness results in an excellent surface finish. The tensile strength (1180 MPa) and the elongation for the as-printed sample (45.0 %) were considerably more significant than that for the wrought sample (1160 MPa and 26.0 %), which is attributed to the combination of low and high-angle boundaries, as confirmed by the electron backscatter diffraction results.
3D打印零件的表面和微观结构特征在机械载荷作用下起着重要作用。研究了激光能量密度对金属直接激光熔化17-4析出硬化不锈钢表面形貌、显微组织和力学性能的影响。考虑的加工参数为激光能量密度及其技术参数:激光功率、层厚、舱口间距和扫描速度。由于旋转扫描的致密化程度(99.74 %)较高,印刷态样品的力学性能和金相性能均优于锻造态样品。X射线衍射结果表明,样品中存在马氏体α相和奥氏体γ相。由于构建方向具有具有细柱状晶粒结构的随机织构,因此力学行为没有明显的各向异性。激光能量密度高,层厚低,表面光洁度好。电子背散射衍射结果证实,打印态试样的拉伸强度(1180 MPa)和伸长率(45.0 %)明显高于变形态试样(1160 MPa和26.0 %),这是低角和高角边界共同作用的结果。
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引用次数: 0
Outlook on texture evolution in additively manufactured stainless steels: Prospects for hydrogen embrittlement resistance, overview of mechanical, and solidification behavior 增材制造不锈钢织构演变的展望:抗氢脆性的展望,力学和凝固行为的概述
IF 0.8 4区 材料科学 Q4 METALLURGY & METALLURGICAL ENGINEERING Pub Date : 2023-08-15 DOI: 10.1557/s43578-023-01130-6
S. Thapliyal, Jiahao Cheng, J. Mayeur, Y. Yamamoto, Patxi Fernandez-Zelaia, A. Nycz, M. Kirka
Realizing application specific manufacture with fusion-based additive manufacturing (F-BAM) processes requires understanding of the physical phenomena that drive evolution of microstructural attributes, such as texture. Current approaches for understanding texture evolution in F-BAM are majorly considerate of the phenomena occurring only during solidification. This hinders the comprehensive understanding and control of texture during F-BAM. In this perspective article, we discuss several physical phenomena occurring during and after solidification that can determine texture in F-BAM processed stainless steels (SS). A crystal plasticity-coupled hydrogen adsorption-diffusion modeling framework is also leveraged to demonstrate the prospects of grain boundary engineering with F-BAM for enhanced hydrogen embrittlement resistance of SS. Implications of varying thermokinetics in F-BAM for solidification behavior of SS are discussed. Additionally, microstructural attributes that are key to high temperature mechanical performance of SS are highlighted. Considerations as outlined in this perspective article will enable grain boundary engineering and application specific microstructural design of SS with F-BAM. Graphical abstract
利用基于融合的增材制造(F-BAM)工艺实现特定应用的制造,需要了解驱动微观结构属性(如纹理)演变的物理现象。目前了解F-BAM织构演变的方法主要考虑的是凝固过程中发生的现象。这阻碍了在F-BAM过程中对纹理的全面理解和控制。在这篇前瞻性的文章中,我们讨论了凝固过程中和凝固后发生的几种物理现象,这些现象可以决定F-BAM加工不锈钢(SS)的织构。本文还利用晶体塑性-氢吸附-扩散耦合建模框架,展示了利用F-BAM进行晶界工程的前景,以增强SS的抗氢脆性。讨论了F-BAM中不同的热动力学对SS凝固行为的影响。此外,强调了影响SS高温力学性能的关键组织属性。本文概述的考虑因素将使使用F-BAM进行晶界工程和特定应用的SS微观结构设计成为可能。图形抽象
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引用次数: 0
Experimental determination of (BCC + FCC) phase fields in the quaternary isotherm of Fe–Ni–Co–Cu at 950°C 950℃Fe-Ni-Co-Cu四元等温线(BCC + FCC)相场的实验测定
IF 0.8 4区 材料科学 Q4 METALLURGY & METALLURGICAL ENGINEERING Pub Date : 2023-08-15 DOI: 10.1557/s43578-023-01124-4
Biswarupa Samantaray, K. Kulkarni
Quaternary isotherm of Fe–Ni–Co–Cu at 950 °C is determined by multiphase diffusion couple experiments, focused on establishing the (BCC + FCC) two-phase regions. The present findings, combined with our previous study, discover the presence of five separate two-phase fields in this isotherm namely (BCC + Cu-rich FCC), (BCC + Cu-lean FCC richer in Fe), (BCC + Cu-lean FCC richer in Co), (Cu-rich FCC + Fe-rich FCC), and (Cu-rich FCC + Co-rich FCC). This also indicates the existence of two three-phase fields. Based on diffusion couples exhibiting planar interfaces between BCC and FCC phases, three tie lines in (BCC + Cu-rich FCC) two-phase field were also determined. It is observed that Fe–Co–Cu ternary isotherm at 950 °C has a wider BCC region (up to 8 wt% Cu) than the commonly accepted phase diagram. A qualitative representation of the entire quaternary isotherm is proposed in the form of multiple iso-Ni concentration sections.
采用多相扩散偶联实验确定了Fe-Ni-Co-Cu在950℃时的第四等温线,重点建立了(BCC + FCC)两相区。结合我们之前的研究,我们发现在等温线中存在5个独立的两相场,即(BCC + Cu-rich FCC)、(BCC + Cu-lean FCC rich Fe)、(BCC + Cu-lean FCC rich Co)、(Cu-rich FCC + Fe-rich FCC)和(Cu-rich FCC + Co-rich FCC)。这也表明存在两个三相场。基于BCC和FCC两相之间存在平面界面的扩散偶,确定了(BCC +富cu FCC)两相场中的三条联结线。结果表明,在950℃时,Fe-Co-Cu三元等温线的BCC区域比一般的相图宽(高达8wt % Cu)。用多个等镍浓度剖面的形式提出了整个四元等温线的定性表示。
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引用次数: 0
Effect of cation insertion on the stability of gliding arc plasma-precipitated mesoporous MnO2 dye bleaching catalysts 阳离子插入对滑动弧等离子体沉淀介孔二氧化锰染料漂白催化剂稳定性的影响
IF 0.8 4区 材料科学 Q4 METALLURGY & METALLURGICAL ENGINEERING Pub Date : 2023-08-11 DOI: 10.1557/s43578-023-01129-z
F. Boyom-Tatchemo, F. Devred, E. Acayanka, G. Kamgang-Youbi, S. Nzali, S. Laminsi, E. Gaigneaux
α-MnO2 and γ-MnO2 polymorphs were, respectively, obtained from the plasma precipitation of KMnO4 and Mn(CH3COO)3⋅2H2O precursors. The obtained powders were calcined at 150 °C, 210 °C and 400 °C, and characterized by X-ray diffraction, Raman spectroscopy, Fourier transform infrared spectroscopy (FTIR), Thermogravimetric analysis (TGA), X-ray photoelectron spectroscopy (XPS), nitrogen physisorption and Scanning electron microscopy (SEM). As a result, the calcination does not significantly affect textural properties and crystalline structure of the α-MnO2, while γ-MnO2 is transformed into β-MnO2 for temperatures above 400 °C. The thermal stability α-MnO2 is due to the K+ ions insertion in its 4.6 Å × 4.6 Å tunnels and corroborated the catalytic performance of 100, 98, 98 and 97% compared to 71, 54, 52 and 48% for γ-MnO2 after four successive reuse cycles on Tartrazine Yellow dye. The insertion of cationic species (K+, Na+, Mg2+) into the structure of MnO2 reinforces its crystalline structure and promotes the formation of powerful oxidizing species through oxygen vacant sites.
通过等离子体沉淀KMnO4和Mn(CH3COO)3⋅2H2O前驱体,分别获得α-MnO2和γ-MnO2多晶体。在150°C、210°C和400°C下煅烧得到的粉末,通过x射线衍射、拉曼光谱、傅里叶变换红外光谱(FTIR)、热重分析(TGA)、x射线光电子能谱(XPS)、氮物理吸附和扫描电子显微镜(SEM)对其进行了表征。结果表明,α-MnO2在400℃以上的煅烧过程中,α-MnO2的织构性质和晶体结构没有明显的变化,而γ-MnO2则转变为β-MnO2。α-MnO2的热稳定性是由于其4.6 Å × 4.6 Å通道中K+离子的插入,证实了连续4次重复使用后γ-MnO2在柠檬黄染料上的催化性能分别为100、98、98和97%,而分别为71、54、52和48%。阳离子物质(K+, Na+, Mg2+)的插入强化了MnO2的晶体结构,并通过氧空位促进了强氧化物质的形成。
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引用次数: 0
Thermal and microwave-absorbing properties of doped polyaniline–epoxy nanocomposites for stealth applications 隐身用掺杂聚苯胺-环氧纳米复合材料的热吸收和微波吸收性能
IF 0.8 4区 材料科学 Q4 METALLURGY & METALLURGICAL ENGINEERING Pub Date : 2023-08-11 DOI: 10.1557/s43578-023-01125-3
V. Pratap, Aasim Hussain, R. Katiyar, A. Soni, Mohit Katiyar, K. Agarwal, H. Baskey, A. Dubey, S. Abbas, R. Nath
The thermal properties of polymeric nanocomposites can be examined using TGA and DSC techniques, while dielectric properties can be examined through simulated scattering (S11, S12, S21, and S22) parameters. Polyaniline (PAni) nanopowder was synthesized using chemical oxidative polymerization techniques. Consequently, the crystallite size and morphology of the synthesized powder were examined using the XRD, TEM, and FESEM techniques. Further, a series of polymeric nanocomposites was developed via wet mixing and compressor molding techniques for various volume percentages (54.0, 57.5, 60.1, and 61.7 vol%) of synthesized powder within PAni/epoxy composites. Consequently, dielectric and absorbing properties have been measured using a vector network analyzer and its software module. The computed complex permittivity data were used to evaluate the absorption for different thicknesses of samples. A minimum reflection loss of − 22.3 dB (> 99.9% absorption) was optimized with broadband frequency ranges. The unique heterostructures of nanocomposite are responsible for the enhanced absorption and shielding performance. Graphical abstract
聚合物纳米复合材料的热性能可以通过热重分析(TGA)和差热分析(DSC)技术来检测,而介电性能可以通过模拟散射(S11、S12、S21和S22)参数来检测。采用化学氧化聚合技术合成了聚苯胺纳米粉体。利用XRD、TEM和FESEM等技术对合成粉体的晶粒大小和形貌进行了表征。此外,通过湿混合和压缩成型技术,在聚苯胺/环氧复合材料中合成了不同体积百分比(54.0%,57.5,60.1和61.7 vol%)的聚合物纳米复合材料。因此,使用矢量网络分析仪及其软件模块测量了介质和吸收特性。利用计算得到的复介电常数数据对不同厚度样品的吸光度进行了评价。在宽带频率范围内,最小反射损耗为- 22.3 dB(> 99.9%的吸收)。纳米复合材料独特的异质结构是增强吸收和屏蔽性能的主要原因。图形抽象
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引用次数: 0
Chitosan-coating strategies on the development of targeted chemodrug delivery nanosystem with titania nanotube arrays 壳聚糖包覆策略在二氧化钛纳米管阵列靶向化学药物递送纳米系统开发中的应用
IF 0.8 4区 材料科学 Q4 METALLURGY & METALLURGICAL ENGINEERING Pub Date : 2023-08-11 DOI: 10.1557/s43578-023-01126-2
Wan Nuramiera Faznie Wan Eddis Effendy, R. B. S. M. N. Mydin, S. Sreekantan, Amirah Mohd Gazzali, R. Hazan, Muhammad Yusri Musa
This study investigates Cisplatin (CDDP)—titania nanotube arrays (TNA) encapsulation efficiency in terms of chitosan-coating strategies including coating methods, coating layers, biocompatibility, and CDDP release in various stimulated model systems. Characterization was performed using field emission scanning electron microscopy, energy-dispersive X-ray, X-ray diffraction, ion-coupled plasma-optical emission spectrometry, fourier transform infrared spectroscopy, and spectrophotometry. The results demonstrated efficient biocompatible loading of CDDP onto a TNA nanosystem using the top-filling method, with an encapsulation efficiency of 98.95 ± 7.02%. This was confirmed by ICP-OES, which detected platinum (Pt) ions for up to ten days. The nanosystem successfully enabled long-term sustained release of CDDP in various stimulated model systems, establishing an effective in vitro targeted cancer therapy model. Further investigation using in vivo models is necessary to validate the findings of this study, particularly in the context of targeted cancer therapy applications. An illustrative description of the present work. The image depicts the workflow in detail on CDDP-loadedTNA (CDDP-TNA)-coating strategies with biopolymer chitosan and CDDP delivery efficiency,especially in prolonged sustained release system targeted for cancer treatment application. An illustrative description of the present work. The image depicts the workflow in detail on CDDP-loadedTNA (CDDP-TNA)-coating strategies with biopolymer chitosan and CDDP delivery efficiency,especially in prolonged sustained release system targeted for cancer treatment application. An illustrative description of the present work. The image depicts the workflow in detail on CDDP-loadedTNA (CDDP-TNA)-coating strategies with biopolymer chitosan and CDDP delivery efficiency,especially in prolonged sustained release system targeted for cancer treatment application.
本研究从壳聚糖包覆策略,包括包覆方法、包覆层数、生物相容性、CDDP释放等方面考察顺铂(CDDP) -二氧化钛纳米管阵列(TNA)的包覆效率。采用场发射扫描电镜、能量色散x射线、x射线衍射、离子耦合等离子体光学发射光谱、傅里叶变换红外光谱和分光光度法进行表征。结果表明,采用顶部填充法将CDDP高效负载在TNA纳米体系上,包封效率为98.95±7.02%。ICP-OES证实了这一点,该仪器对铂(Pt)离子进行了长达十天的检测。该纳米系统成功地使CDDP在各种受刺激的模型系统中长期持续释放,建立了有效的体外靶向癌症治疗模型。进一步的研究需要使用体内模型来验证这项研究的结果,特别是在靶向癌症治疗应用的背景下。对当前工作的说明性描述。该图详细描述了生物聚合物壳聚糖负载CDDP- dtna (CDDP- tna)涂层策略的工作流程和CDDP的递送效率,特别是针对癌症治疗应用的延长缓释系统。对当前工作的说明性描述。该图详细描述了生物聚合物壳聚糖负载CDDP- dtna (CDDP- tna)涂层策略的工作流程和CDDP的递送效率,特别是针对癌症治疗应用的延长缓释系统。对当前工作的说明性描述。该图详细描述了生物聚合物壳聚糖负载CDDP- dtna (CDDP- tna)涂层策略的工作流程和CDDP的递送效率,特别是针对癌症治疗应用的延长缓释系统。
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引用次数: 0
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International Journal of Materials Research
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