The Van der Waals force induced phononic band gap and resonant scattering in two-nanosphere aggregate
发布时间：2025-04-30
点击次数：
- 发布时间：
- 2025-04-30
- 论文名称：
- The Van der Waals force induced phononic band gap and resonant scattering in two-nanosphere aggregate
- 发表刊物：
- Journal of Nanoparticle Research
- 摘要：
- A physical mechanism of phononic band gap and resonant nanoacoustic scattering in an aggregate of two elastic nanospheres is presented in this paper. By considering the Van der Waals (VdW) force between two nanospheres illuminated by nanoacoustic wave, phononic band gap and frequency shift at the lower frequency side, and largely enhanced nanoacoustic scattering at the other frequency range have been found through calculating the form function of the acoustic scattering from the nanosystem. This VdW-force-induced band gap is different from the known mechanisms of Bragg scattering and local resonances for periodic media. It is shown that when the separation distance between two nanospheres is decreasing from 20 nm to 1 nm, due to the increasing VdW force, the nanoacoustic scattering is much heightened by two order of magnitude, and meanwhile the frequency shift and phononic band gap at the low frequencies are both widened. These results could provide potential applications of nanoacoustic devices.
- 合写作者：
- Jiu Hui Wu, Siwen Zhang, Kejiang Zhou
- 卷号：
- Vol.14, No.10
- 页面范围：
- 1193
- 是否译文：
- 否
- 发表时间：
- 2012-09-06