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题名: Aggregation-Induced Enhancement Effect of Gold Nanoparticles on Triplet Excited State
作者: Yang, Wen1;  Liu, Kunhui1;  Song, Di1;  Du, Qian1;  Wang, Rennian1;  Su, Hongmei1
刊名: JOURNAL OF PHYSICAL CHEMISTRY C
发表日期: 2013-12-26
DOI: 10.1021/jp410369w
卷: 117, 期:51, 页:27088-27095
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Physical ;  Nanoscience & Nanotechnology ;  Materials Science, Multidisciplinary
研究领域[WOS]: Chemistry ;  Science & Technology - Other Topics ;  Materials Science
英文摘要: Remarkable optical properties are posed with gold nanoparticles (AuNPs) due to the excitation of localized surface plasmon resonances, which makes AuNPs affect strongly both the ground state and the excited state of adjacent organic molecules. Compared with the ground state, the effect of AuNPs on excited state of organic molecules is not always fully understood. Here, we performed transient UV-vis absorption experiments to monitor the triplet excited state formation of three cationic dyes and one anionic dye in the presence of two types of gold nanoparticles: the citrate-stabilized AuNPs and ATP-protected AuNPs. It is found that the three cationic dyes can cause efficient aggregation of citrate-stabilized AuNPs, leading to AuNPs aggregates with varied size, whereas the ATP-protected AuNPs can be sustained in the monodispersed state. By comparing the circumstances of aggregated AuNPs and monodispersed AuNPs, we demonstrate that the enhancement effect on triplet excited state formation results from the aggregation of gold nanoparticles and depends on the aggregation size. These findings reveal the aggregation induced plasmon field interaction of AuNPs with excited state population dynamics and may enable new applications of aggregated metal nanoparticles, where aggregates can serve as stronger plasmonic nanoantennas.
关键词[WOS]: FLUORESCENCE ENHANCEMENT ;  RAMAN-SCATTERING ;  SPECTROSCOPY ;  ASSEMBLIES ;  PLASMONICS ;  NUCLEATION ;  SILVER ;  SIZE
语种: 英语
WOS记录号: WOS:000329331300029
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/137985
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, Beijing Natl Lab Mol Sci BNLMS, Inst Chem, State Key Lab Mol React Dynam, Beijing 100190, Peoples R China

Recommended Citation:
Yang, Wen,Liu, Kunhui,Song, Di,et al. Aggregation-Induced Enhancement Effect of Gold Nanoparticles on Triplet Excited State[J]. JOURNAL OF PHYSICAL CHEMISTRY C,2013,117(51):27088-27095.
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