| Item type |
文献 / Documents(1) |
| 公開日 |
2019-11-22 |
| アクセス権 |
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アクセス権 |
open access |
| 資源タイプ |
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資源タイプ識別子 |
http://purl.org/coar/resource_type/c_6501 |
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資源タイプ |
journal article |
| 出版社版DOI |
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|
識別子タイプ |
DOI |
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関連識別子 |
https://doi.org/10.1039/C5CP07395B |
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|
言語 |
ja |
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|
関連名称 |
10.1039/C5CP07395B |
| 出版タイプ |
|
|
出版タイプ |
AM |
|
出版タイプResource |
http://purl.org/coar/version/c_ab4af688f83e57aa |
| タイトル |
|
|
タイトル |
Laser-driven phase transitions in aqueous colloidal gold nanoparticles under high pressure : picosecond pump–probe study |
|
言語 |
en |
| 著者 |
橋本, 修一
片山, 哲郎
瀬戸浦, 健仁
Strasser, Michael
ウワダ, タカユキ
ミヤサカ, ヒロシ
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| 抄録 |
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内容記述タイプ |
Abstract |
|
内容記述 |
Pump-probe transient extinction spectroscopy was applied to analyze 355-nm picosecond laser heating-induced phenomena of 60-nm-diameter aqueous gold nanoparticles (AuNPs) under a high pressure of 60 MPa. Kinetic spectroscopy revealed that a supercritical layer surrounding the AuNP nucleated with a lifetime of approximately 1 ns in its dynamic expansion and decay behavior for a fluence of 19.6 mJ cm−2. Moreover, we observed in the post-mortem transmission electron micrographs a number of fragments, a small percentage of size-reduced cores, and erupted particles, among the intact particles after 60 shots, suggesting that evaporation occurs under laser illumination. The particle temperature calculation indicated that evaporation begins with a liquid droplet AuNP surrounded by a supercritical layer at temperatures below the boiling point of gold. By applying high pressure, we are able to obtain a clear picture of the evaporation event, which was not possible at ambient pressure because the forming bubble caused particle temperatures to rise uncontrollably. In this study, we shed light on the critical role of the supercritical layer formed around the AuNP under high pressure during laser-induced evaporation. |
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言語 |
en |
| 抄録 |
|
|
内容記述タイプ |
Abstract |
|
内容記述 |
Pulsed-laser illumination of aqueous gold colloids under high pressure enables the evaporation from liquid droplets surrounded by supercritical water layer. |
|
言語 |
en |
| 書誌情報 |
en : Physical Chemistry Chemical Physics
巻 18,
号 6,
p. 4994-5004,
発行日 2016-01-14
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| 収録物ID |
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収録物識別子タイプ |
ISSN |
|
収録物識別子 |
14639076 |
| 収録物ID |
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|
収録物識別子タイプ |
ISSN |
|
収録物識別子 |
14639084 |
| 収録物ID |
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|
収録物識別子タイプ |
NCID |
|
収録物識別子 |
AA11301773 |
| 収録物ID |
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収録物識別子タイプ |
NCID |
|
収録物識別子 |
AA11723355 |
| 出版者 |
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|
出版者 |
The Royal Society of Chemistry |
|
言語 |
en |
| EID |
|
|
識別子 |
306336 |
|
識別子タイプ |
URI |
| 言語 |
|
|
言語 |
eng |
pccp_18_6_4994.pdf (2.49 MB)
