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学科主题: 物理化学
题名: White Light Assisted Photosensitized Synthesis of Ag Nanoparticles: Excited-State Hydrogen Bonding Roles
作者: Yang, Yang1;  Liu, Lei1, 3;  Yin, Hongming1, 2;  Xu, Dali1;  Liu, Guangye1;  Song, Xiancheng4;  Liu, Jianyong1
通讯作者: 尹鸿鸣 ;  刘建勇
刊名: JOURNAL OF PHYSICAL CHEMISTRY C
发表日期: 2013-06-06
DOI: 10.1021/jp4030624
卷: 117, 期:22, 页:11858-11865
收录类别: SCI
合作性质: 
文章类型: Article
部门归属: 11
项目归属: 1101
产权排名: 待补充
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Physical ;  Nanoscience & Nanotechnology ;  Materials Science, Multidisciplinary
资助者: 1,1
研究领域[WOS]: Chemistry ;  Science & Technology - Other Topics ;  Materials Science
英文摘要: Ag nanoparticles (NPs) with different surface morphologies can be synthesized through white light irradiation of photochemically prepared Ag nanoseeds within 20 min. The fundamental photophysical and photochemical properties of benzil in deaerated solvents at room temperature are investigated through analyzing nanosecond absorption spectra. In ethanol, after the single photon excitation of benzil by 355 nm nanosecond laser pulses, one kind of reactive intermediate with a long-lived lifetime of 375.83 +/- 93.70 mu s is generated and capable of reducing the coexisted Ag+ to generate Ag nanoseeds with their diameters in the range from 3 to 12 nm. Theoretical calculations indicate that the reactive intermediate is benzil-ethanol hydrogen-bonded complex biradical (ben-eth biradical). Furthermore, the excited-state hydrogen bonding dynamics and its influence on the photophysical and photochemical properties are discussed. White light irradiation under air can make these Ag nanoseeds grow in size with a speed of 10 nm/min and have unique morphologies. In particularly, the nanowhisker covered Ag NPs can be synthesized and possess a unique narrow optical absorption peak at 325 nm. This work not only provides insights into the mechanisms of photosensitized synthesis of Ag nanoseeds but also emphasizes the utilization of white light as a convenient and efficient tool to tailor morphologies of Ag NPs.
关键词[WOS]: PHOTOCHEMICAL-SYNTHESIS ;  GOLD NANOPARTICLES ;  PROTON-TRANSFER ;  FLUORESCENCE ;  DYNAMICS ;  BENZIL ;  NANOSTRUCTURES ;  IRRADIATION ;  EXCITATION ;  MECHANISM
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000320214800050
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/119263
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Mol React Dynam, Dalian 116023, Peoples R China
2.Dalian Maritime Univ, Dept Phys, Dalian 116026, Peoples R China
3.Dalian Univ Technol, State Key Lab Fine Chem, Dalian 116024, Peoples R China
4.Beihang Univ, Sch Jet Prop, Beijing 100191, Peoples R China

Recommended Citation:
Yang, Yang,Liu, Lei,Yin, Hongming,et al. White Light Assisted Photosensitized Synthesis of Ag Nanoparticles: Excited-State Hydrogen Bonding Roles[J]. JOURNAL OF PHYSICAL CHEMISTRY C,2013,117(22):11858-11865.
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