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首页> 外文期刊>Environmental Science & Technology: ES&T >Size and Strain of Zinc Sulfide Nanoparticles Altered by Interaction with Organic Molecules
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Size and Strain of Zinc Sulfide Nanoparticles Altered by Interaction with Organic Molecules

机译:Size and Strain of Zinc Sulfide Nanoparticles Altered by Interaction with Organic Molecules

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摘要

Nanosized zinc sulfides(nano-ZnS)have size-dependent and tunable physical and chemical properties that make them useful for a variety of technological applications.For example,structural changes,especially caused by strain,are pronounced in nano-ZnS < 5 nm in size,the size range typical of incidental nano-ZnS that form in the environment.Previous research has shown how natural organic matter impacts the physical properties of nano-ZnS but was mostly focused on their aggregation state.However,the specific organic molecules and the type of functional groups that are most important for controlling the nano-ZnS size and strain remain unclear.This study examined the size-dependent strain of nano-ZnS synthesized in the presence of serine,cysteine,glutathione,histidine,and acetate.Synchrotron total scattering pair distribution function analysis was used to determine the average crystallite size and strain.Among the different organic molecules tested,those containing a thiol group were shown to affect the particle size and size-induced strain most strongly when added during synthesis but significantly reduced the particle strain when added to as-formed nano-ZnS.The same effects are useful to understand the properties and behavior of natural nano-ZnS formed as products of microbial activity,for example,in reducing environments,or of incidental nano-ZnS formed in organic wastes.

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