title: Silver microflowers and large spherical particles: Controlled preparation and their wetting properties.
abstract: In this article, we report a simple wet-chemical method to prepare silver microflowers and large spherical particles. The formation of the two different microstructures of silver is based on the reduction of AgNO(3) by para-phenylenediamine in aqueous medium at room temperature. The controlling of the silver microstructures can be achieved only by adjusting the concentration of the reactants. It is found that the two different silver microstructures display opposite wetting properties. Large spherical silver particles exhibit superhydrophilic properties with a contact angle (CA) of close to 0 degrees, microflower-like silver particles exhibit highly hydrophobic properties with CA about 132 degrees. X-ray diffraction (XRD), X-ray photoelectron spectra (XPS) and UV-vis spectra are used to characterize the chemical structure of the obtained products.
authors: Key Laboratory of Supramolecular Structure and Materials of Ministry of Education, Jilin University, #2699 Qianjin Street, Changchun 130012, PR China.
authors: Wei
authors: W
authors: Song
authors: Huiying
authors: H
authors: Jia
authors: Qian
authors: Q
authors: Cong
authors: Bing
authors: B
authors: Zhao
mesh_terms: D057927:Hydrophobic and Hydrophilic Interactions; D010316:Particle Size; D012834:Silver / Q000737:chemistry*; D012835:Silver Nitrate / Q000737:chemistry; D013057:Spectrum Analysis; D055672:Static Electricity; D013499:Surface Properties; D017155:Wettability; D014961:X-Ray Diffraction
chemical_list: D012834:Silver; D012835:Silver Nitrate