当前位置: X-MOL 学术J. Colloid Interface Sci. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
[email protected] [email protected] pH-sensitive nanocomposites suitable for drug entrapment
Journal of Colloid and Interface Science ( IF 9.4 ) Pub Date : 2017-12-31 , DOI: 10.1016/j.jcis.2017.12.072
Joaquim Clara-Rahola , Ana Moscoso , Ana Belén Ruiz-Muelle , Marco Laurenti , Petr Formanek , Juan M. Lopez-Romero , Ignacio Fernández , J. Fernando Diaz , Jorge Rubio-Retama , Andreas Fery , Rafael Contreras-Cáceres

We synthesize and characterize pH-responsive hybrid nanocomposites with SERS and drug loading applications. This colloidal system is structured by spherical 50 nm Au cores individually coated by a pH-sensitive shell of poly4-vinylpyridine ([email protected]). The synthesis of these hybrid nanocomposites is performed in two steps, a first one involves the fabrication of vinyl-functionalized Au nanoparticles, and a second one includes the controlled overgrowth of a p4VP shell by free radical polymerization. As a result, [email protected] hybrid systems with a mean diameter ranging from 150 to 57 nm are obtained upon varying the monomer concentration at synthesis. [email protected] nanocomposite exhibits pH-response capabilities, confirmed by cryo-TEM analysis, Small Angle X-ray Scattering (SAXS) and Zeta Potential (ZP) measurements at different pH conditions. The [email protected] particles also display a controllable swelling response, which depends on the cross-linker density within the polymer. This swelling capability is analyzed by Dynamic Light Scattering (DLS), and UV–vis spectroscopy at different pHs. The pH-responsive capability is here exploited for the chemical entrapment of doxorubicin hydrochloride (Dox) into the polymer network. The presence of this molecule is resolved by Surface Enhanced Raman Spectroscopy (SERS) measurements. The entrapment efficiency of Dox by the [email protected] system is determined via NMR spectroscopy of the supernatants.



中文翻译:

[受电子邮件保护] [受电子邮件保护] pH敏感纳米复合材料,适用于药物包裹

我们合成和表征具有SERS和载药应用的pH响应杂化纳米复合材料。该胶体系统由球形的50 nm Au核构成,该核分别被聚4-乙烯基吡啶的pH敏感壳包裹([电子邮件保护])。这些杂化纳米复合材料的合成分两个步骤进行,第一个涉及乙烯基功能化Au纳米粒子的制备,第二个包括通过自由基聚合控制p4VP壳的过度生长。结果,通过改变合成时的单体浓度,获得了具有150-57nm的平均直径的[电子邮件保护的]杂化系统。[受电子邮件保护]纳米复合材料具有pH响应功能,已通过冷冻TEM分析得到证实,在不同pH条件下的小角X射线散射(SAXS)和Zeta电位(ZP)测量。[受电子邮件保护的]颗粒还显示出可控制的溶胀响应,这取决于聚合物内的交联剂密度。通过在不同pH值下的动态光散射(DLS)和紫外可见光谱分析了这种溶胀能力。在此利用pH响应能力将盐酸阿霉素(Dox)化学截留到聚合物网络中。该分子的存在通过表面增强拉曼光谱(SERS)测量来解决。通过[电子邮件保护的]系统对Dox的包封效率是通过上清液的NMR光谱确定的。这取决于聚合物内的交联剂密度。通过在不同pH值下的动态光散射(DLS)和紫外可见光谱分析了这种溶胀能力。在此利用pH响应能力将盐酸阿霉素(Dox)化学截留到聚合物网络中。该分子的存在通过表面增强拉曼光谱(SERS)测量来解决。通过[电子邮件保护的]系统对Dox的包封效率是通过上清液的NMR光谱确定的。这取决于聚合物内的交联剂密度。通过在不同pH值下的动态光散射(DLS)和紫外可见光谱分析了这种溶胀能力。在此利用pH响应能力将盐酸阿霉素(Dox)化学截留到聚合物网络中。该分子的存在通过表面增强拉曼光谱(SERS)测量来解决。通过[电子邮件保护的]系统对Dox的包封效率是通过上清液的NMR光谱确定的。通过表面增强拉曼光谱(SERS)测量可分辨该分子的存在。通过[电子邮件保护的]系统对Dox的包封效率是通过上清液的NMR光谱确定的。该分子的存在通过表面增强拉曼光谱(SERS)测量来解决。通过[电子邮件保护的]系统对Dox的包封效率是通过上清液的NMR光谱确定的。

更新日期:2017-12-31
down
wechat
bug