共查询到20条相似文献,搜索用时 109 毫秒
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化学镀在纳米材料表面改性中的应用 总被引:1,自引:0,他引:1
纳米材料具有传统材料所没有的许多崭新特性,已成为当今材料科学和凝聚态物理研究的前沿热点领域.化学镀可有效地改善纳米材料的使用性能.介绍了化学镀法对纳米Cu、Al2O3、金刚石、Si3N4粉体材料和碳纳米管表面进行改性的研究进展及其在各领域中的应用. 相似文献
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Torsten Hegmann Hao Qi Vanessa M. Marx 《Journal of Inorganic and Organometallic Polymers and Materials》2007,17(3):483-508
Revolutionary developments in the fabrication of nanosized particles have created enormous expectations in the last few years
for the use of such materials in areas such as medical diagnostics and drug-delivery, and in high-tech devices. By its very
nature, nanotechnology is of immense academic and industrial interest as it involves the creation and exploitation of materials
with structural features in between those of atoms and bulk materials, with at least one dimension limited to between 1 and
100 nm. Most importantly, the properties of materials with nanometric dimensions are, in most instances, significantly different
from those of atoms or bulk materials. Research efforts geared towards new synthetic procedures for shape and size-uniform
nanoscale building blocks as well as efficient self-assembly protocols for manipulation of these building blocks into functional
materials has created enormous excitement in the field of liquid crystal research. Liquid crystals (LCs) by their very nature
are suitable candidates for matrix-guided synthesis and self-assembly of nanoscale materials, since the liquid crystalline
state combines order and mobility at the molecular (nanoscale) level. Based on selected relevant examples, this review attempts
to give a short overview of current research efforts in LC-nanoscience. The areas addressed in this review include the synthesis
of nanomaterials using LCs as templates, the design of LC nanomaterials, self-assembly of nanomaterials using LC phases, defect
formation in LC-nanoparticle suspensions, and potential applications. Despite the seeming diversity of these research topics,
this review will make an effort to establish logical links between these different research areas. 相似文献
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ZnO纳米材料抗凝血性能的初步评价 总被引:4,自引:0,他引:4
采用体外动态凝血时间实验评价了ZnO纳米材料的抗凝血性能. 纳米材料的平均粒度在10~30 nm. 实验分为对照组(抗凝全血1 ml)、无纳米组(抗凝全血1 ml,包括搅拌血浆0.4 ml)、ZnO纳米材料组(抗凝全血1 ml,包括搅拌血浆0.4 ml,加入ZnO纳米材料1 mg)和Fe纳米材料组(抗凝全血1 ml,包括搅拌血浆0.4 ml,加入Fe纳米材料1 mg). 每组样品分别在5, 15, 30及45 min测定光密度值,计算结果表明,ZnO纳米材料的抗凝血率在45 min时仍保持在70%,而对照组和Fe纳米材料组的抗凝血率在15 min时已降至30%. 实验表明ZnO纳米材料具有良好的抗凝血作用. 相似文献
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介绍了共沸蒸馏脱水的基本原理和置换剂的选择条件,综述了共沸蒸馏脱水技术在纳米材料制备中的应用,探讨了共沸蒸馏脱水在纳米粉体制备过程中的防团聚机理,指出了共沸蒸馏脱水技术目前还存在的问题和今后的研究方向. 相似文献
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Synthesis,Properties, and Selected Technical Applications of Magnesium Oxide Nanoparticles: A Review
In the last few decades, there has been a trend involving the use of nanoscale fillers in a variety of applications. Significant improvements have been achieved in the areas of their preparation and further applications (e.g., in industry, agriculture, and medicine). One of these promising materials is magnesium oxide (MgO), the unique properties of which make it a suitable candidate for use in a wide range of applications. Generally, MgO is a white, hygroscopic solid mineral, and its lattice consists of Mg ions and O ions. Nanostructured MgO can be prepared through different chemical (bottom-up approach) or physical (top-down approach) routes. The required resultant properties (e.g., bandgap, crystallite size, and shape) can be achieved depending on the reaction conditions, basic starting materials, or their concentrations. In addition to its unique material properties, MgO is also potentially of interest due to its nontoxicity and environmental friendliness, which allow it to be widely used in medicine and biotechnological applications. 相似文献
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利用溶致液晶的有序结构特性,在不同的介观空间内组装不同性质的纳米粒子,从而获得具有特定功能的纳米材料。本文研究内容主要包括:利用非离子表面活性剂Brij58制备反六角相溶致液晶,以该反六角液晶为模板,以Cu(NO3)2水溶液代替体系中的水相制备铜纳米粒子。利用偏光显微镜、X射线衍射和粒度分析仪对样品进行表征。实验表明,不同浓度下形成不同相的液晶,在400℃下煅烧可得到CuO纳米材料。 相似文献