Laser-induced sound pinging (LISP): A rapid photoacoustic method to determine the speed of sound in microliter fluid volumes

Polo‐Parada, Luis; Gutiérrez-Juárez, G.; Kist, Jennifer A.; Adhikari, Laxmi; Bhawawet, Nakara; Baker, Gary A.

doi:10.1016/j.snb.2019.04.080

Cited by 7 publications

(4 citation statements)

References 41 publications

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“…Summary of the temperature-dependent bulk modulus measured for the eight DESs studied herein (note that, to avoid plot congestion, the 1:2 N 8888 Br/DecA data shown are fully representative of the remaining hydrophobic DESs). Also shown for comparison are representative literature values for 1-butyl-3-methylimidazolium hexafluorophosphate ([C 4 mim][PF 6 ]), 1-butyl-3-methylimidazolium tetrafluoroborate ([C 4 mim][BF 4 ]), 1-ethyl-3-methylimidazolium triflate ([C 2 mim][TfO]), dimethyl(isopropyl)-propylammonium bis(trifluoromethylsulfonyl)imide ([Nip 311 ][Tf 2 N]), N -butylpyridinium tetrafluoroborate ([C 4 pyr][BF 4 ]), N -butyl- N -methylpyrrolidinium bis(trifluoromethylsulfonyl)imide ([C 4 mpy][Tf 2 N]), water, 31% glycerol in water, 95% glycerol in water (i.e., glycerine), and ethanol …”

Section: Resultsmentioning

confidence: 99%

“…For more information regarding the use of these and related techniques for ultrasound analysis of ionic liquids, we refer interested readers to the superb recent review by Dzida et al These techniques, unfortunately, generally require large sample volumes (e.g., >10 mL) which can be prohibitive when determining speed of sound in liquids which are expensive, difficult to make, limited in quantity, or radioactive. Our group recently reported a novel technique for rapid optical soundwave generation and detection which aims to alleviate this high-volume requirement . By this novel design, pulsed light from a laser is transferred through an optical fiber which is terminally capped by an optically dense coating.…”

Section: Introductionmentioning

confidence: 99%

“…Our group recently reported a novel technique for rapid optical soundwave generation and detection which aims to alleviate this high-volume requirement. 12 By this novel design, pulsed light from a laser is transferred through an optical fiber which is terminally capped by an optically dense coating. The rapid thermal expansion of this material imposed by the impinging light produces an acoustic vibration which propagates through a fluid in which the fiber terminus is submerged.…”

Section: Introductionmentioning

confidence: 99%

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Fixed-Path Length Laser-Induced Sound Pinging: A Streamlined Method for Sound Speed Determination in Arbitrary Liquids

et al. 2019

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Recently, we introduced laser-induced sound pinging (LISP) as a simple photoacoustic technique for the expedient and fairly rapid (2−3 min) measurement of the speed of sound traversing low-volume samples (25−1000 μL), built around an inexpensive tattoo-removal laser source (Sens. Actuators B-Chem. 2019, 291, 401−410). In this report, we expand on the utility of this technique by improving the facility of measurement and speed of analysis by adopting a fixed-path length (FPL) architecture which allows for much faster analysis (1−5 s) of similar sample volumes. The FPL-LISP setup was employed to determine the speeds of sound at temperatures from 293 to 333 K for four popular hydrophilic deep eutectic solvents (DESs) containing choline chloride (i.e., reline, ethaline, glyceline, and maline), plus several representative decanoic acid−based (i.e., hydrophobic) DESs. The temperature-dependent speeds of sound were used alongside the corresponding experimental densities to calculate the bulk modulus for these illustrative DESs. Interestingly, the bulk modulus was in the 4000−5000 MPa range for choline chloride-derived DESs, essentially twice the value of a hydrophobic DES (typified by 1:2 tetraoctylammonium bromide/decanoic acid), suggesting unique potential for hydraulic applications, for example. The modest volume requirements of FPL-LISP make it suitable for determining the speed of sound in scarce, precious, or hazardous liquids, and the speed of analysis enables integration into a continuous-flow platform for real-time analytics (e.g., beverage quality control).

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Fixed-Path Length Laser-Induced Sound Pinging: A Streamlined Method for Sound Speed Determination in Arbitrary Liquids

et al. 2019

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“…When an object is irradiated by laser, the laser energy is quickly absorbed and heat is generated. This creates large thermal gradients near the object surfaces and results in thermal expansion [14][15][16]. Then a certain stress distribution is generated and ultrasonic waves are excited.…”

Section: Principles Of Laser-ultrasonic Detection Of Infected Kernelsmentioning

confidence: 99%

Numerical simulations of infected-grain detection based on laser�ultrasonic technique

Chen¹,

Ya-jie²,

Yu-pei³

2019

Ukr. J. Phys. Opt.

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When a wheat kernel is infected by insects, nutrients of the kernel are damaged, which reduces the commercial value of wheat and threatens its food safety. We suggest a new non-destructive method for revealing infected kernels, which is based on laser-induced ultrasonic. A detection process is simulated using a finite-element analysis. Firstly, we formulate a finite-element model for normal wheat and models for infected wheat (with the wormhole radii 0.4, 0.6, 0.8 and 1.0 mm), following from a classical thermal-stress theory. Secondly, a controlling equation is obtained, a process of ultrasonic excitation is simulated for all the models using a standard Newmark time-integration method, and the ultrasonic signals are obtained for those models. Finally, we derive the velocity of ultrasonic wave propagating in the kernel and analyze the relationships among the ultrasonic parameters and the structural parameters of the models. Our results show that the time interval between two adjacent ultrasonic echoes depends notably upon the internal kernel structure. In particular, the interval between the first and second echoes is longer and the interval between the second and third echoes is shorter with increasing wormhole radius. This can be used for finding out the infected kernels at early stages and determining the sizes of wormholes.

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The effect of distance between lens and water surface on the acoustic characteristics induced by a 532 nm nanosecond laser under water

et al. 2021

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Laser-induced sound pinging (LISP): A rapid photoacoustic method to determine the speed of sound in microliter fluid volumes

Cited by 7 publications

References 41 publications

Fixed-Path Length Laser-Induced Sound Pinging: A Streamlined Method for Sound Speed Determination in Arbitrary Liquids

Fixed-Path Length Laser-Induced Sound Pinging: A Streamlined Method for Sound Speed Determination in Arbitrary Liquids

Numerical simulations of infected-grain detection based on laser�ultrasonic technique

The effect of distance between lens and water surface on the acoustic characteristics induced by a 532 nm nanosecond laser under water

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