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新兴能源技术的二氧化钛纳米结构
Titanium dioxide has been used as the white pigment since the ancient times.95% of its current usage in industry involves paints, cosmetics, plastics, paper, and food. However, in near future the economic impact of titanium dioxide seems to be controlled by energy related applications mostly. Therefore, this chapter projects a brief outlook on the added value provided by the titanium dioxide structures in new and emerging technologies of the energy sector. The applications focused are: solar fuels, solar cells, fuel cells, Li ion batteries and solid state lighting. In those applications, TiO_2 standouts with its chemical and thermal stability, morphology variety, position of conduction and valance band energy levels, optical properties and cost.
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用于生物技术的绿色纳米材料生成
Green technologies have been around since the first public health projects were set up in cities to provide people with clean drinking water. To date, a new generation of green technologies is expected to arrive, as pressures on resources grow and investors see healthy profit in a wide range of innovative products. Moreover, in an attempt to alleviate fossil fuel usage and CO_2 emissions, fuels, heat or electricity must be produced from biological sources in a way that is economic (and therefore efficient at a local scale), energetically (and greenhouse gas) efficient, environmentally friendly and not competitive with food production. Aims to advance the development of clean technologies using nanotechnology, to minimize potential environmental and human health risks associated with the manufacture and use of nanotechnology products in general, to apply nano to solve legacy environmental problems, and to encourage replacement of existing products with new nanoproducts, bionanotechnology, a new crosscutting technology platform, will build an environmentally sustainable society in the 21st century. Therefore, aim to provide vital information about the growing field of nanomaterials formed by green nanotechnology for bioapplication to minimize the potential human health and environmental risk, the technologies included author's own research (such as nanoparticles/NPs, carbon nanotubes/CNTs, and membranes) based on bionanotechnology for the friendly environment are reviewed. Furthermore, the current development and future prospects related to the significantly feasible world's eco-bionanotechnology for the foreseeable future are also pointed out.
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生物聚电解质:溶液,凝胶,分子间配合物和纳米粒子
In this chapter, a detailed discussion on the salient features of structures of biomolecules like proteins, carbohydrates and nucleic acids is presented. Intermolecular interactions leading to phase separation, coacervation and nano-particle formation is discussed herein. Biomolecular solutions exist as gels, coacervates, dispersions and melts with each of these phases having its signature physico-chemical properties, which is discussed in this chapter. The discussions are supported by robust experimental data obtained from an array of methods like turbidimetry, elecrophoresis, viscosity, light scattering etc. The inevitability of the phenomenon of self-organization in biopolymers results in the generation of a variety of soft matter phases which do not, however, make it predictable. For instance, the associative aggregation is a process which remains obscure, as every protein aggregates in a different manner under different conditions. One known feature to the aggregation of proteins is the strong dependence upon pH, salt concentration and temperature. Beyond the influence of these factors and their effects on aggregation, the process is not well understood. An increase in protein usage in biomedical and pharmaceutical studies implicates protein aggregation in Alzheimer's, Parkinson's and other diseases, and have placed a growing importance upon understanding this behaviour in general. Comparison of the system to other protein-polyelectrolyte systems suggests that the preferential binding of the two could be a result of complexation of the two molecules which often lead to coacervation. Such association can even occur at pH greater than the isoelectric points (pI), when the net charge of protein is of the same sign as that of polyelectrolyte. Such binding though prevalent in nature is not well understood. In summary, a comprehensive account of biomolecular phase states and their inherent attributes are presented in this review.