Article
Acoustics
Yang Shen, Rachel Pflieger, Weizhong Chen, Muthupandian Ashokkumar
Summary: In our previous study, we proposed a new model for single bubble dynamics that considers the effect of bulk viscosity. In this study, we conducted experiments to test this model using a 30% (v/v) glycerol-water mixture. The results showed that the calculated bubble dynamics were not significantly affected by bulk viscosity under the experimental conditions. However, there was a noticeable delay in the first rebound when bulk viscosity was taken into account. The sonoluminescence intensities were also compared between the two models, but no significant difference was observed, confirming the negligible effect of bulk viscosity in this condition.
ULTRASONICS SONOCHEMISTRY
(2023)
Article
Chemistry, Physical
Raffaela Cabriolu, Bruno G. Pollet, Pietro Ballone
Summary: Molecular dynamics simulation was used to study the impact of two ionic liquids (IL) on the nucleation, growth, and collapse of (nano)cavities in water. The first IL, tetra-ethyl ammonium mesylate, decreased the tendency of water to form cavities at 25 wt % concentration. The second IL, tetrabutyl phosphonium 2,4-dimethylbenzenesulfonate, promoted the formation of bubbles at the interface of water and IL-rich domains. The presence of ions hindered the collapse of cavities in [P4444][DMBS]/water solutions.
JOURNAL OF PHYSICAL CHEMISTRY B
(2023)
Article
Acoustics
Morteza Abedini, Stefanie Hanke, Fabian Reuter
Summary: We have quantitatively studied cavitation damage non-invasively, in-place and time-resolved at microsecond resolution. By generating a single, laser-induced bubble in an aqueous NaCl solution near the surface of an aluminum sample, we were able to measure the cavitation damage in the nanometer thin passive layer of the aluminum surface via the corrosion current from repassivation. Correlation between the corrosion current and the bubble dynamics allows for understanding the contribution of cavitation damage at different stages of the bubble dynamics.
ULTRASONICS SONOCHEMISTRY
(2023)
Article
Optics
Bulat M. Gareev, Airat M. Abdrakhmanov, Glyus L. Sharipov
Summary: Nanoparticles of ZnS or Tb(acac)3•H2O crystals with a size below 50 nm were suspended in water using multibubble sonolysis, and single-bubble sonoluminescence was observed in an ultrasonic standing wave. The sonoluminescence spectra exhibited characteristic emissions from ZnS or Tb3+. The spectra were similar to photoluminescence spectra, but with some intensity variations.
JOURNAL OF LUMINESCENCE
(2023)
Article
Instruments & Instrumentation
Bulat M. Gareev, Airat M. Abdrakhmanov, Glyus L. Sharipov
Summary: This research review discusses a new method called sonoluminescent spectroscopy for element luminescence determination. The advantages and disadvantages of the technique of multibubble sonoluminescence (MBSL) in solutions are discussed, and a new technique called moving single-bubble sonoluminescence (m-SBSL) in colloidal suspensions is proposed as a preferable method. The article provides a detailed description of the standard procedure for the preparation and recording of m-SBSL in colloidal suspensions, as well as examples of characteristic spectra of some elements obtained and recorded for the first time according to this new technique.
APPLIED SPECTROSCOPY
(2022)
Article
Mechanics
Majid Rodgar, Helene Scolan, Jean-Louis Marie, Delphine Doppler, Jean-Philippe Matas
Summary: The study experimentally examined the behavior of a bubble injected into a horizontal liquid solid-body rotating flow, showing how factors such as bubble size, rotation speed, and buoyancy impact the bubble's aspect ratio and movement. The study also found that at certain extreme conditions, such as when the Reynolds number exceeds 3000, the bubble can experience abrupt transitions and potentially break up due to resonance between the periodic forcing of the rotating cell and the eigenmodes of the stretched bubble.
JOURNAL OF FLUID MECHANICS
(2021)
Article
Chemistry, Physical
G. L. Sharipov, B. M. Gareev, A. M. Abdrakhmanov
Summary: Single-bubble sonoluminescence of colloidal suspensions in dodecane containing Ln(3+) ions was investigated, showing different luminescence spectra for different types of ions. Suspensions with Tb3+ or Gd3+ ions exhibited narrow bands of f-f transitions, while Ce3+ or Pr3+ ions did not exhibit luminescent d-f transitions despite entering the bubble. This difference is attributed to the probability of collisional excitation during different electronic transitions in Ln(3+) ions.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2021)
Article
Acoustics
Xiaoxiao Zheng, Xiaoyu Wang, Yuning Zhang
Summary: The oscillation characteristics of a free oscillating bubble in liquid with second-order Mach number were investigated and compared with the predictions of the first-order equation. The results show significant differences between the predictions of the two equations.
ULTRASONICS SONOCHEMISTRY
(2022)
Article
Materials Science, Multidisciplinary
Meng Wang, Lv Zhao, Marion Fourmeau, Daniel Nelias, Zhenhuan Li
Summary: This study investigates the crack roughness of Wallner lines promoted by shear waves and surface corrugations induced by spontaneous front oscillations in dynamic cracks. The statistical distribution and roughness exponents of surface height variations are determined. The Wallner lines show self-affinity with a Gaussian distribution and a roughness exponent of 0.8, while the surface corrugations do not exhibit self-affinity. Interestingly, specific instabilities exhibit similar physical properties as front waves, rendering the crack roughness self-affine with a Gaussian distribution and a roughness exponent of 0.5.
INTERNATIONAL JOURNAL OF FRACTURE
(2023)
Article
Mechanics
Wangxia Wu, Bing Wang, Qingquan Liu
Summary: A study on high-speed droplet impingement on a constrained wall with embedded cavities is conducted to achieve high energy convergence and peak pressure amplification. The physical evolution mechanisms of the impinging droplet and the embedded cavities are investigated, and a theoretical prediction model for the intensity of each cavity collapse is established.
JOURNAL OF FLUID MECHANICS
(2022)
Article
Acoustics
Bai Lichun, Sun Jinguang, Gao Yandong, Xu Weilin, Zeng Zhije, Ma Yuhang, Bai Lixin
Summary: The study found that in an 18.5 kHz ultrasonic field, the circular motion of submillimeter-sized bubbles attached to a boundary exhibits unique characteristics, different from the motion of suspended bubbles in water. This research is helpful to understand and improve industrial applications such as ultrasonic cleaning, sonochemical treatment, and aeration.
ULTRASONICS SONOCHEMISTRY
(2021)
Article
Instruments & Instrumentation
Bulat M. Gareev, Airat M. Abdrakhmanov, Kristina S. Vasilyuk, Dim I. Galimov, Glyus L. Sharipov
Summary: In this study, colloidal suspensions of EuCl2, EuBr2, and EuSO4 nanoparticles were successfully synthesized, and the luminescence of the Eu2+ ion was observed using the moving single-bubble sonoluminescence technique. The injection of nanoparticles into the bubble during motion was found to excite the lanthanide ion through collisions with charged particles.
APPLIED SPECTROSCOPY
(2023)
Article
Engineering, Aerospace
Kyungwon Oh, Seonghee Kho
Summary: The purpose of this paper is to analyze the structural stability of an underwater high-speed vehicle. The drag characteristics of a moving body in water at high speed were analyzed, and the non-conservative property was applied to perform stability analysis of the structure in a rocket propulsion environment. The fluid characteristics enabling high-speed maneuvering in an underwater environment were described, and the structural stability was analyzed by simplifying the modeling through increased drag. Additionally, an analysis of the forces generated by drag and axial load and their impact on structural stability was conducted by simplifying the structure attached to a specific location during supercavitation.
Article
Optics
Tingting Zheng, Kun Huang, Ben Sun, Jianan Fang, Yongyuan Chu, Hairun Guo, E. Wu, Ming Yan, Heping Zeng
Summary: This article reports on an ultra-sensitive and broadband mid-infrared upconversion spectrometer that utilizes a silicon nitride nanophotonic waveguide to create a supercontinuum source covering 1.5-4.2 µm. High-efficiency and low-noise nonlinear frequency upconversion is achieved using coincidence pulsed pumping and spectro-temporal optimization, enabling silicon detectors to perform MIR single-photon spectroscopy at 0.2 photons/nm/pulse. Furthermore, the upconversion-based array spectrometer achieves high-speed spectral acquisition rates beyond 200 kHz, which is about tenfold faster than state-of-the-art FTIR-based spectrometers at a comparable spectral resolution. The achieved features of broadband spectral coverage, single-photon sensitivity, and sub-MHz refreshing rate open up new possibilities for infrared transient spectral measurements in combustion analysis, high-throughput sorting, and reaction tracking, among others.
LASER & PHOTONICS REVIEWS
(2023)
Article
Chemistry, Multidisciplinary
Makayla M. Schmidt, Emily A. Farley, Marit A. Engevik, Trey N. Adelsman, Ariadne Tuckmantel Bido, Nathan D. Lemke, Alexandre G. Brolo, Nathan C. Lindquist
Summary: The concept of plasmonic hotspots is central to nanophotonics, specifically in surface-enhanced Raman scattering (SERS). SERS signals from single molecules often exhibit fluctuations, challenging the concept of static hotspots. Recent experiments have shown SERS intensity fluctuations (SIFs) to occur over a wide range of timescales due to various physical mechanisms causing SERS and the dynamic nature of light-matter interaction. This study presents a high-speed acquisition system that captures SERS spectra with microsecond time resolution, revealing that high-speed SIF events occur with relatively equal probability over a broad spectral range.
Article
Acoustics
Hyang-Bok Lee, Pak-Kon Choi
ULTRASONICS SONOCHEMISTRY
(2018)
Article
Acoustics
Hyang-Bok Lee, Pak-Kon Choi
ULTRASONICS SONOCHEMISTRY
(2014)
Article
Chemistry, Physical
Hyang-Bok Lee, Pak-Kon Choi
JOURNAL OF PHYSICAL CHEMISTRY B
(2020)
Proceedings Paper
Engineering, Electrical & Electronic
Hyang-Bok Lee, Pak-Kon Choi
2018 IEEE INTERNATIONAL ULTRASONICS SYMPOSIUM (IUS)
(2018)
