Single-Bubble Sonochemiluminescence in Aqueous Luminol Solutions

Hatanaka, Shin–ichi; Mitome, Hideto; Yasui, Kyuichi; Hayashi, Shigeo

doi:10.1021/ja0258475

Cited by 100 publications

(60 citation statements)

References 21 publications

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“…It has been modeled and experimentally confirmed for a single bubble that the strength of the bubble collapse is affected by its translational movement (accelerated due to added mass forces while the driving pressure increases), and that the strength of the bubble collapse and its sphericity (i.e., the focusing power) are key ingredients determining the SL and SCL intensity (Brenner et al, 1995;Sadighi-Bonabi et al, 2009;Hatanaka et al, 2002;Brenner et al, 2002). Indeed, in our experiments higher SL is observed for higher power.…”

Section: Comparing Sl and Sclsupporting

confidence: 67%

Sonoluminescence and sonochemiluminescence from a microreactor

Rivas

Ashokkumar

Leong

et al. 2012

Ultrasonics Sonochemistry

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Micromachined pits on a substrate can be used to nucleate and stabilize microbubbles in a liquid exposed to an ultrasonic field. Under suitable conditions, the collapse of these bubbles can result in light emission (sonoluminescence, SL). Hydroxyl radicals (OH . ) generated during bubble collapse can react with luminol to produce light (sonochemiluminescence, SCL). SL and SCL intensities were recorded for several regimes related to the pressure amplitude (low and high acoustic power levels) at a given ultrasonic frequency (200 kHz) for pure water, and aqueous luminol and propanol solutions. Various arrangements of pits were studied, with the number of pits ranging from no pits (comparable to a classic ultrasound reactor), to three-pits. Where there was more than one pit present, in the high pressure regime the ejected microbubbles combined into linear (two-pits) or triangular (three-pits) bubble clouds (streamers). In all situations where a pit was present on the substrate, the SL was intensified and increased with the number of pits at both low and high power levels. For imaging SL emitting regions, Argon (Ar) saturated water was used under similar conditions. SL emission from aqueous propanol solution (50 mM) provided evidence of transient bubble cavitation. Solutions containing 0.1 mM luminol were also used to demonstrate the radical production by attaining the SCL emission regions.

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Section: Comparing Sl and Sclsupporting

confidence: 67%

Sonoluminescence and sonochemiluminescence from a microreactor

Rivas

Ashokkumar

Leong

et al. 2012

Ultrasonics Sonochemistry

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“…This in turn can lead to fragmentation into smaller bubbles that may repeat the process or dissolve [32,[46][47][48][49][50]. Accordingly, the concept has been visualised as 'dancing bubbles' as, upon fragmentation, a larger bubble ejects tiny bubbles and can be seen to dance by counteraction [51,52]. Neppiras presented calculations for the threshold for the emission of these bubbles (often termed microbubbles) that were four times the threshold for bubble surface instabilities [53].…”

Section: Theoretical Backgroundmentioning

confidence: 99%

“…Therefore by controlling this phenomenon it is possible to control the sonochemical activity taking place. Several authors indirectly or directly have altered sonochemical effects through bubble surface instabilities, although it was not the primary focus of their work [51,69,[114][115][116][117]. Bubble surface instabilities may be seen as unwanted due to asymmetric collapse which can reduce the temperatures and pressures achieved, however the required pressures and temperatures for disassociation can still be readily achievable in a transient cavitation field [69].…”

Section: Theoretical Backgroundmentioning

confidence: 99%

A parametric review of sonochemistry: Control and augmentation of sonochemical activity in aqueous solutions

Wood

Lee

Bussemaker

2017

Ultrasonics Sonochemistry

260

137

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Please cite this article as: R.J. Wood, J. Lee, M.J. Bussemaker, A parametric review of sonochemistry: control and augmentation of sonochemical activity in aqueous solutions, Ultrasonics Sonochemistry (2017), doi: http:// dx.doi.org/10. 1016/j.ultsonch.2017.03.030 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.A parametric review of sonochemistry: control and augmentation of sonochemical activity in aqueous solutions

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“…Because cavitation initiates at the gas-liquid interfaces, it is expected that sonochemical reactions will be most prominent near these locations. We used the well-known oxidation of luminol in a sodium carbonate base solution to monitor the cavitation-induced production of H and OH radicals (12,13). They subsequently trigger the formation of an amino phthalate derivative with electrons in an excited state.…”

Section: Resultsmentioning

confidence: 99%

Sonochemistry and sonoluminescence in microfluidics

Tandiono

Ohl

et al. 2011

Proc. Natl. Acad. Sci. U.S.A.

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One way to focus the diffuse energy of a sound field in a liquid is by acoustically driving bubbles into nonlinear oscillation. A rapid and nearly adiabatic bubble collapse heats up the bubble interior and produces intense concentration of energy that is able to emit light (sonoluminescence) and to trigger chemical reactions (sonochemistry). Such phenomena have been extensively studied in bulk liquid. We present here a realization of sonoluminescence and sonochemistry created from bubbles confined within a narrow channel of polydimethylsiloxane-based microfluidic devices. In the microfluidics channels, the bubbles form a planar/pancake shape. During bubble collapse we find the formation of OH radicals and the emission of light. The chemical reactions are closely confined to gas-liquid interfaces that allow for spatial control of sonochemical reactions in lab-on-a-chip devices. The decay time of the light emitted from the sonochemical reaction is several orders faster than that in the bulk liquid. Multibubble sonoluminescence emission in contrast vanishes immediately as the sound field is stopped.cavitation | ultrasound | capillary waves

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Single-Bubble Sonochemiluminescence in Aqueous Luminol Solutions

Cited by 100 publications

References 21 publications

Sonoluminescence and sonochemiluminescence from a microreactor

Sonoluminescence and sonochemiluminescence from a microreactor

A parametric review of sonochemistry: Control and augmentation of sonochemical activity in aqueous solutions

Sonochemistry and sonoluminescence in microfluidics

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