1
|
Cichos F, Xia T, Yang H, Zijlstra P. The ever-expanding optics of single-molecules and nanoparticles. J Chem Phys 2024; 161:010401. [PMID: 38949895 DOI: 10.1063/5.0221680] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2024] [Accepted: 06/10/2024] [Indexed: 07/03/2024] Open
Affiliation(s)
- F Cichos
- Peter Debye Institute for Soft Matter Physics, Leipzig University, Leipzig, Germany
| | - T Xia
- Institute for Immunology, School of Medicine, Tsinghua University, Beijing, China
| | - H Yang
- Department of Chemistry, Princeton University, Princeton, New Jersey 08544, USA
| | - P Zijlstra
- Department of Applied Physics and Science Education, Eindhoven University of Technology (TU/e), Eindhoven, The Netherlands
| |
Collapse
|
2
|
Imaeda K, Shikama Y, Ushikoshi S, Sakai S, Ryuzaki S, Ueno K. Coherent acoustic vibrations of Au nanoblocks and their modulation by Al2O3 layer deposition. J Chem Phys 2024; 160:144702. [PMID: 38587227 DOI: 10.1063/5.0202690] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2024] [Accepted: 03/20/2024] [Indexed: 04/09/2024] Open
Abstract
Coherent acoustic phonons induced in metallic nanostructures have attracted tremendous attention owing to their unique optomechanical characteristics. The frequency of the acoustic phonon vibration is highly sensitive to the material adsorption on metallic nanostructures and, therefore, the acoustic phonon offers a promising platform for ultrasensitive mass sensors. However, the physical origin of acoustic frequency modulation by material adsorption has been partially unexplored so far. In this study, we prepared Al2O3-deposited Au nanoblocks and measured their acoustic phonon frequencies using time-resolved pump-probe measurements. By precisely controlling the thickness of the Al2O3 layer, we systematically investigated the relation between the acoustic phonon frequency and the deposited Al2O3 amounts. The time-resolved measurements revealed that the acoustic breathing modes were predominantly excited in the Au nanoblocks, and their frequencies increased with the increment of the Al2O3 thickness. From the relationship between the acoustic phonon frequency and the Al2O3 thickness, we revealed that the acoustic phonon frequency modulation is attributed to the density change of the whole sample. Our results would provide fruitful information for developing quantitative mass sensing devices based on metallic nanostructures.
Collapse
Affiliation(s)
- Keisuke Imaeda
- Faculty of Science, Hokkaido University, Kita 10, Nishi 8, Kita-ku, Sapporo, Hokkaido 060-0810, Japan
| | - Yuto Shikama
- Graduate School of Chemical Sciences and Engineering, Hokkaido University, Kita 10, Nishi 8, Kita-ku, Sapporo, Hokkaido 060-0810, Japan
| | - Shimba Ushikoshi
- Graduate School of Chemical Sciences and Engineering, Hokkaido University, Kita 10, Nishi 8, Kita-ku, Sapporo, Hokkaido 060-0810, Japan
| | - Satoshi Sakai
- Graduate School of Chemical Sciences and Engineering, Hokkaido University, Kita 10, Nishi 8, Kita-ku, Sapporo, Hokkaido 060-0810, Japan
| | - Sou Ryuzaki
- Faculty of Science, Hokkaido University, Kita 10, Nishi 8, Kita-ku, Sapporo, Hokkaido 060-0810, Japan
| | - Kosei Ueno
- Faculty of Science, Hokkaido University, Kita 10, Nishi 8, Kita-ku, Sapporo, Hokkaido 060-0810, Japan
| |
Collapse
|