研究目的
本研究旨在利用已有成果,开发一种原创策略来合成一类新型杂化纳米结构——等离子体磁性脂质体。具体方法是通过在双层膜中包载疏水性超顺磁性氧化铁纳米粒子(SPIONs)的阳离子脂质体表面修饰球形亲水性金纳米粒子。
研究成果
首次报道了一种新型多功能磁-等离子体纳米杂化材料的合成,该材料在靶向药物递送与释放等生物医学应用领域可能产生重大影响。通过协同利用并控制主要构建单元间的疏水作用和静电相互作用,以高度可重复的方式实现了这种新型多功能纳米杂化材料的合成。采用互补技术对纳米杂化体的每个组分进行了全面表征,从而深入理解其特性。合成后,运用相同技术对多功能磁-等离子体纳米杂化体进行表征,以评估该复杂体系中各特性的演变过程。首次通过干样品拉曼光谱分析了超顺磁性氧化铁纳米粒子的成功掺入及其在脂质双分子层中引发的改变,同时采用溶液体系评估了杂化体的等离子体特性?;诒疚某氏值奶匦?,可以推测这种新型多功能纳米杂化材料的合成可能成为生物医学应用领域的重要突破。
研究不足
提供的文本中未明确提及实验的技术和应用限制,以及潜在的优化领域。
实验设计方法包括合成疏水性超顺磁性氧化铁纳米颗粒(SPIONs)和聚乙二醇功能化(PEGylated)金纳米颗粒(AuNPs)。将SPIONs掺入脂质体脂质双层中形成阳离子磁脂体,并在膜中加载不同浓度的SPIONs。通过静电相互作用,用阴离子PEGylated金纳米颗粒修饰阳离子磁脂体。采用拉曼光谱分析SPIONs的成功掺入及其在双层中产生的修饰作用。通过紫外-可见吸收光谱和(表面增强)拉曼光谱研究多功能纳米杂化物的等离子体特性,并在不同频率和磁场强度下记录其高热特性。
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Tetramethylammonium hydroxide solution
25 wt.% in H2O
Sigma-Aldrich
Used in the hydrophilization step of SPIONs.
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Tetrachloroauric (III) acid
Sigma-Aldrich
Used in the synthesis of PEGylated gold nanoparticles.
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Iron (III) acetylacetonate
Sigma-Aldrich
Used in the synthesis of superparamagnetic iron oxide nanoparticles.
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Oleic acid
Sigma-Aldrich
Used in the synthesis of superparamagnetic iron oxide nanoparticles.
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Oleylamine
Sigma-Aldrich
Used in the synthesis of superparamagnetic iron oxide nanoparticles.
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1,2-hexadecanediol
Sigma-Aldrich
Used in the synthesis of superparamagnetic iron oxide nanoparticles.
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Chloroform
Sigma-Aldrich
Used as a solvent in the synthesis of liposomal dispersions.
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Benzyl ether
Sigma-Aldrich
Used as a solvent in the synthesis of superparamagnetic iron oxide nanoparticles.
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Polyethylene glycol 1000
Carl Roth
Used as both reducing and capping agents in the synthesis of PEGylated gold nanoparticles.
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Trisodium citrate dihydrate
Carl Roth
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Methylene blue
Carl Roth
Used in SERS measurements.
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1,2-Dioleoyloxi-3-trimethylammonium-propane chloride
Lipoid GmbH
Used in the synthesis of cationic liposomes.
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Soybean phosphatidyl-choline
Lipoid GmbH
Used in the synthesis of cationic liposomes.
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Sodium hydroxide micropearls
Lach-Ner
Used in the synthesis of PEGylated gold nanoparticles.
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Double-distilled water
18.2 M?
Used as a solvent in various synthesis processes.
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T92+UV–VIS Spectrophotometer
PG Instruments
Used for UV-Vis absorption measurements.
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HT7700 Transmission Electron Microscope
Hitachi
Used for TEM and EDS measurements.
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Brucker D8 Advance diffractometer
Bruker
Used for X-ray diffraction measurements.
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Vascoγ nanoparticle analyzer
Cordouan Technologies
Used for photon correlation spectroscopy measurements.
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Wallisζ Zeta potential analyzer
Cordouan Technologies
Used for zeta potential measurements.
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