2022 Fiscal Year Final Research Report
Study of photoexcited carrier transfer between single semiconductor nanoparticle and adsorbed molecules
| Project/Area Number |
20K15130
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| Research Category |
Grant-in-Aid for Early-Career Scientists
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| Allocation Type | Multi-year Fund |
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| Review Section |
Basic Section 28030:Nanomaterials-related
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| Research Institution | Gakushuin University |
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Principal Investigator |
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| Project Period (FY) |
2020-04-01 – 2023-03-31
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| Keywords | 単一ナノ粒子分光 / フォトルミネッセンス分光 / 顕微分光 / 酸化亜鉛 / ナノ粒子 |
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| Outline of Final Research Achievements |
We have performed photoluminescence (PL) spectroscopy of single semiconductor nanoparticle. Zinc oxide nanoparticles synthesized by laser ablation in liquid (LAL) showed differences in exciton emission peak position and width by each particle. Angular particles showed stronger defect emission and broader exciton peaks than spherical ones. In addition, we tried to acquire the spectra of single zinc oxide nanoparticle by low-temperature PL spectroscopy. As a result, we detected unknown PL emissions. In the measurements of the PL emission lifetime, the emission intensity of the zinc oxide semiconductor nanoparticles was weak and could not be detected. Instead of that, the PL emission lifetime of anthracene was successfully measured. In the future, we will expand our research into the evaluation of photoexcited carrier transfer in organic-inorganic composite materials such as anthracene adsorbed on nanoparticles.
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| Free Research Field |
顕微分光
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| Academic Significance and Societal Importance of the Research Achievements |
個々のナノ粒子の特性評価は，より高度なナノテクノロジーの発展に重要である．本研究では酸化亜鉛ナノ粒子個々のフォトルミネッセンス分光に取り組み，ナノ粒子合成過程に関する知見の取得，未知の発光を観測するなどの成果を得た．これは凝集状態のナノ粒子の評価では観測できないものであり，学術的にも興味深いものである．また，このようなナノ粒子個々の性質を利用すれば新たな原理に基づくデバイスの開発などにつながる可能性があり，社会的意義をもつ成果である．
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