نتایج جستجو برای: wet chemical

تعداد نتایج: 409378  

2015
Wentian Wang Adrian Lowe Shankar Kalyanasundaram

Tensile tests were performed on two different natural fibre composites (same constituent material, similar fibre fraction and thickness but different weave structure) to determine changes in mechanical properties caused by various aqueous chemical treatments and whether any permanent changes remain on drying. Scanning electronic microscopic examinations suggested that flax fibres and the flax/p...

2016
Jie Zhang Bo-Ya Dong Jingchun Jia Lianhuan Han Fangfang Wang Chuan Liu Zhong-Qun Tian Zhao-Wu Tian Dongdong Wang Dongping Zhan

Can isotropic wet chemical etching be controlled with a spatial resolution at the nanometer scale, especially, for the repetitive microfabrication of hierarchical 3D m-nanostructures on the continuously curved surface of functional materials? We present an innovative wet chemical etching method called “electrochemical buckling microfabrication”: first, a constant contact force is applied to gen...

2013
Feng Xu Jianming Yu Tesfaye Tesso Floyd Dowell Donghai Wang

Current wet chemical methods for biomass composition analysis using two-step sulfuric acid hydrolysis are time-consuming, labor-intensive, and unable to provide structural information about biomass. Infrared techniques provide fast, low-cost analysis, are non-destructive, and have shown promising results. Chemometric analysis has allowed researchers to perform qualitative and quantitative study...

Journal: :The journal of physical chemistry. B 2006
Peigen Cao Hongbin Yu James R Heath

Chlorine-terminated Si(111) surfaces prepared through the wet-chemical treatment of H-terminated Si(111) surfaces with PCl5 (in chlorobenzene) were investigated using ultrahigh vacuum scanning tunneling microscopy (UHV cryo-STM) and tunneling spectroscopy. STM images, collected at 77 K, revealed an unreconstructed 1 x 1 structure for the chlorination layer, consistent with what has been observe...

2013
Wei Li Thomas Cochell Arumugam Manthiram

Metallic aluminum (Al) is of interest as a reducing agent because of its low standard reduction potential. However, its surface is invariably covered with a dense aluminum oxide film, which prevents its effective use as a reducing agent in wet-chemical synthesis. Pitting corrosion, known as an undesired reaction destroying Al and is enhanced by anions such as F⁻, Cl⁻, and Br⁻ in aqueous solutio...

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