完整後設資料紀錄
DC 欄位語言
dc.contributor.authorYang, Jing-Cyuanen_US
dc.contributor.authorChen, Chun-Huaen_US
dc.contributor.authorWu, Ren-Jyeen_US
dc.date.accessioned2014-12-08T15:22:24Z-
dc.date.available2014-12-08T15:22:24Z-
dc.date.issued2012en_US
dc.identifier.issn1466-8033en_US
dc.identifier.urihttp://hdl.handle.net/11536/15865-
dc.identifier.urihttp://dx.doi.org/10.1039/c2ce06385aen_US
dc.description.abstractSilver crystals with various novel nano-scale morphologies were synthesized from the reduction of silver nitrate (AgNO3) by ascorbic acid (AsA) in aqueous PEO-PPO-PEO tri-block copolymer (F127) solutions. The presence of only high-concentration AsA at the very initial stage of reduction acts as a key factor in forming distinct branched quasi-spherical Ag nanocrystals where coral-like and houseleek-like morphologies can be kinetically controlled via subsequent addition of F127. When AsA and F127 were mixed before the reduction, three-dimensional dendritic Ag nanocrystals with highly ordered dendrites were largely obtained. In contrast to these branched crystals prepared under low F127 concentration, the face-centered cubic (FCC) packed micelles at high F127 concentration, which provided orderly reaction spaces for AgNO3 and AsA reagents, dominated the growth of triangular and hexagonal prisms. The great variety in morphology is directly correlated with not only the concentration ratio between these reactants but the F127 induced kinetic mechanisms. Moreover, the greatly branched Ag nanocrystals exhibit significant surface-enhanced Raman scattering (SERS) for facilely, rapidly and effectively determining malachite green oxalate (MG) in aqueous solution. The present results provide valuable data not only for fundamental understanding of the directing effect of both F127 and AsA on the synthesis of Ag nanocrystals, but for advanced design and practical manufacturing of metals enhanced SERS sensors.en_US
dc.language.isoen_USen_US
dc.titleFacile growth of silver crystals with greatly varied morphologies by PEO-PPO-PEO tri-block copolymersen_US
dc.typeArticleen_US
dc.identifier.doi10.1039/c2ce06385aen_US
dc.identifier.journalCRYSTENGCOMMen_US
dc.citation.volume14en_US
dc.citation.issue8en_US
dc.citation.spage2871en_US
dc.citation.epage2878en_US
dc.contributor.department材料科學與工程學系zh_TW
dc.contributor.departmentDepartment of Materials Science and Engineeringen_US
dc.identifier.wosnumberWOS:000301735400034-
dc.citation.woscount6-
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