High resolution in-situ observation and analysis of atomic behavior in gold nanorods induced by irradiation with infrared laser pulses
| Project/Area Number |
25289221
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Partial Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Physical properties of metals/Metal-base materials
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| Research Institution | Kyushu University |
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Principal Investigator |
Matsumura Syo 九州大学, 工学(系)研究科(研究院), 教授 (60150520)
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| Co-Investigator(Renkei-kenkyūsha) |
YASUDA KAZUHIRO 九州大学, 大学院工学研究院, 准教授 (80253491)
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| Project Period (FY) |
2013-04-01 – 2016-03-31
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| Project Status |
Completed (Fiscal Year 2015)
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| Budget Amount *help |
¥18,070,000 (Direct Cost: ¥13,900,000、Indirect Cost: ¥4,170,000)
Fiscal Year 2015: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Fiscal Year 2014: ¥13,650,000 (Direct Cost: ¥10,500,000、Indirect Cost: ¥3,150,000)
Fiscal Year 2013: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
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| Keywords | ナノ材料 / プラズモニクス / レーザー光 / 高分解能電子顕微鏡 / その場観察 / 原子変位 / 多重双晶粒子 |
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| Outline of Final Research Achievements |
This study aimed at promoting our understanding of atomic behaviors in gold nanorods under illumination of infrared laser pulses, taking advantage of in-situ high voltage electron microscopy (HVEM) as well as aberration-corrected scanning transmission electron microscopy (STEM). The wavelength of laser pulses was 1064 nm. The single crystalline nanorods was gradually deformed to be a barrel-like shape with {001} and {111} habit surfaces with the number of pulses illuminated when the averaged intensity per pulse was 410 J/m2. If the intensity was twice enhanced to be 820 J/m2, the deformation was much accelerated, and some nanorods were transformed to be multiple twinned particles. Drift-compensated high-angle annular dark field (HAADF) STEM images showed so high precision in locating the atomic columns as ±4 pm. In a deformed twinned particle, substantial displacements of atomic columns on the order of several tens of picometers were localized around multiple twin junctions.
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Report
(4 results)
Research Products
(17 results)
