NDLI: From Nanoplates to Microtubes and Microrods: A Surfactant-Free Rolling Mechanism for Facile Fabrication and Morphology Evolution of $Ag_{2}S$ Films

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From Nanoplates to Microtubes and Microrods: A Surfactant-Free Rolling Mechanism for Facile Fabrication and Morphology Evolution of $Ag_{2}S$ Films

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From Nanoplates to Microtubes and Microrods: A Surfactant-Free Rolling Mechanism for Facile Fabrication and Morphology Evolution of $Ag_{2}S$ Films

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Gao, Yuan-hao Lau, Woon-ming Li, Da-peng Zheng, Zhi Lei, Yan Yang, Feng-ling Huang, Bao-jun Zhang, Yi-dong Ge, Su-xiang Wong, Ka-wai
Description	Author Affiliation: Li DP ( Institute of Surface Micro and Nano Materials, Xuchang University, Xuchang 461000, PR China.)
Abstract	By a simple and facile wet-chemistry technique without any surfactant, various shapes of $Ag_{2}S$ crystals—including leaflike pentagonal nanoplates, crinkly nanoscrolls, hexagonal prismlike microtubes, and microrods—were fabricated in situ on a large-area silver-foil surface separately. Detailed experiments revealed that the $Ag_{2}S$ nanoplates were formed just by immersing the silver foil in a sulfur/ethanol solution at room temperature and atmospheric pressure, and they subsequently rolled into nanoscrolls and further grew into microtubes and microrods under solvothermal conditions. Inspired by the natural curling of a piece of foliage, we proposed a surfactant-free rolling mechanism to interpret the observed morphological evolution from lamellar to tubular structures. Based on these simple, practical, and green chemical synthetic routes, we can easily synthesize lamellar, scrolled, tubular, and clubbed $Ag_{2}S$ crystals by simply adjusting the reaction temperature, pressure, and time. It is very interesting to note that the current rolling process is quite different from the previous reported rolling mechanism that highly depends on the surfactants; we revealed that the lamellar $Ag_{2}S$ could be rolled into tubular structures without using any surfactant or other chemical additives, just like the natural rolling process of a piece of foliage. Therefore, this morphology-controlled synthetic route of $Ag_{2}S$ crystals may provide new insight into the synthesis of metal sulfide semiconducting micro-/nanocrystals with desired morphologies for further industrial applications. The optical properties of the pentagonal $Ag_{2}S$ nanoplates/film were also investigated by UV/Vis and photoluminescence (PL) techniques, which showed large blue-shift of the corresponding UV/Vis and PL spectra.
ISSN	09476539
e-ISSN	15213765
Journal	Chemistry - A European Journal
Issue Number	27
Volume Number	17
Language	English
Publisher	Wiley-VCH;ChemPubSoc Europe
Publisher Date	2011-06-27
Publisher Place	Germany
Access Restriction	Open
Subject Keyword	Membranes, Artificial Microtubules Chemistry Nanostructures Silver Compounds Particle Size Surface Properties Research Support, Non-U.S. Gov't
Content Type	Text
Resource Type	Article
Subject	Organic Chemistry Catalysis

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