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首页> 外文期刊>Research Journal of Nanoscience and Nanotechnology >Proposing a Feasible Mechanism to Support the Exhibition of Superb Colloidal Stability of Gold Nanoparticles with Poly Vinyl Pyrrolidone in the form of a Nanofluid in N, N?-Dimethyl Formamide
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Proposing a Feasible Mechanism to Support the Exhibition of Superb Colloidal Stability of Gold Nanoparticles with Poly Vinyl Pyrrolidone in the form of a Nanofluid in N, N?-Dimethyl Formamide

机译：提出一种可行的机制来支持以N，N？-二甲基甲酰胺中的纳米流体形式的聚乙烯吡咯烷酮形式的金纳米颗粒的超高胶体稳定性的展示

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In this article, proposed a probable mechanism to corroborate execution of excellent colloidal stability of gold (Au) nanoparticles (NPs) in presence poly (vinyl pyrrolidone) PVP polymer in N, N?-dimethyl formamide (DMF) solvent, as nanofluids (NFs) in support of experimental outcomes. Appearance of a surface plasmon resonance band near 525 nm in the absorption spectra suggests formation of gold NPs in presence of PVP in DMF. The emergence of X-ray diffraction peaks at 111, 200, 220 and 222 corresponds to diffraction angles 38, 45, 65 and 78, respectively, reveals that Au NPs have fcc crystal structure. Slight red-shift (i.e., from 525-530 nm) in the surface plasmon resonance band of the one year aged sample strongly suggests that Au-NPs are highly stable in presence of PVP, particularly in DMF. An enhancement in the some of the vibration bands of PVP in presence of Au-NPs suggests donor-acceptor type interaction between Au-NPs and PVP via O-atoms. In comparison to bare PVP, an increased zeta potential value with an enhanced surface conductivity in Au-PVP NF in DMF suggests that both PVP and DMF supplies electrons to the surface of Au-NP. In the aged sample, hardly any change in the zeta potential value supports the absorption analyses. Shear thinning characteristics in the Au-PVP NF in DMF suggests presence of cross-linked structure between PVP, DMF and Au-NP. Core-shell structure from the microstructures of the NF demonstrates that PVP and DMF molecules are encapsulating Au-NPs via O-atoms. Development of highly stable Au-NPs is useful for drug delivery applications.
机译：在本文中，提出了一种可能的机制，以证实在N，N？-二甲基甲酰胺（DMF）溶剂中存在聚乙烯吡咯烷酮PVP聚合物作为纳米流体（NFs）的情况下，金（Au）纳米颗粒（NPs）具有出色的胶体稳定性。 ）以支持实验结果。吸收光谱中525 nm附近的表面等离振子共振带的出现表明在DMF中存在PVP时会形成金纳米颗粒。 X射线衍射峰分别出现在111、200、220和222处，分别对应于衍射角38、45、65和78，表明Au NP具有fcc晶体结构。一年老化样品的表面等离子体共振带中出现轻微的红移（即525-530 nm），这强烈表明Au-NP在PVP存在下是高度稳定的，尤其是在DMF中。在存在Au-NPs时PVP某些振动带的增强表明Au-NPs和PVP之间通过O原子进行供体-受体型相互作用。与裸露的PVP相比，DMF中Au-PVP NF中增加的zeta电位值和增强的表面电导率表明PVP和DMF均向Au-NP表面提供电子。在老化的样品中，ζ电位值的任何变化几乎都不能支持吸收分析。 DMF中Au-PVP NF的剪切稀化特性表明PVP，DMF和Au-NP之间存在交联结构。 NF的微结构的核-壳结构表明PVP和DMF分子通过O原子包裹了Au-NP。高度稳定的Au-NPs的开发对于药物输送应用很有用。

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