Raman spectroscopy of optically levitated supercooled water droplet

Suzuki, Hidenori; Matsuzaki, Yoshiki; Muraoka, Azusa; Tachikawa, Masashi

doi:10.1063/1.4729476

Cited by 38 publications

(36 citation statements)

References 70 publications

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“…The Raman shifts ∆ν j were determined by fitting each Raman spectrum to five broad Gaussian components representing the fundamental O−H stretching band [36,37] and up to five additional Gaussian peaks representing the resonances; one example of such a fit is shown in Fig. 2 as black solid curve for the spectrum measured at z = 0.9 mm (left panel).…”

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confidence: 99%

“…Vibrational spectroscopy has been widely applied to the study of the structure of bulk liquid water [46]. In particular, spectroscopic investigations of liquid water from ambient to supercooled conditions had evidenced a continuous evolution in the Raman spectral features [36,37,47]. With decreasing temperature the low-frequency side of the O−H stretching band around 3200 cm −1 becomes more pronounced with respect to the high-frequency side around 3400 cm −1 .…”

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confidence: 99%

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Shrinking of Rapidly Evaporating Water Microdroplets Reveals their Extreme Supercooling

Goy

Potenza

Dedera³

et al. 2018

Phys. Rev. Lett.

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The fast evaporative cooling of micrometer-sized water droplets in a vacuum offers the appealing possibility to investigate supercooled water-below the melting point but still a liquid-at temperatures far beyond the state of the art. However, it is challenging to obtain a reliable value of the droplet temperature under such extreme experimental conditions. Here, the observation of morphology-dependent resonances in the Raman scattering from a train of perfectly uniform water droplets allows us to measure the variation in droplet size resulting from evaporative mass losses with an absolute precision of better than 0.2%. This finding proves crucial to an unambiguous determination of the droplet temperature. In particular, we find that a fraction of water droplets with an initial diameter of 6379±12 nm remain liquid down to 230.6±0.6 K. Our results question temperature estimates reported recently for larger supercooled water droplets and provide valuable information on the hydrogen-bond network in liquid water in the hard-to-access deeply supercooled regime.

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confidence: 99%

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confidence: 99%

Shrinking of Rapidly Evaporating Water Microdroplets Reveals their Extreme Supercooling

Goy

Potenza

Dedera³

et al. 2018

Phys. Rev. Lett.

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“…Although Raman spectroscopy is mostly used to probe the composition of the droplet, it has also been applied to evaluate the temperature. Suzuki et al successfully used the combination of an optical trap with Raman spectroscopy to capture the thermodynamic behavior of single droplets of water in a supercooled state [ 101 ]. Additionally, Heinisch et al investigated the temperature evolutions in single water droplets that evaporated while injecting nitrogen gas [ 102 ].…”

Section: Physics Of Particle Formation From a Drying Dropletmentioning

confidence: 99%

Unraveling Particle Formation: From Single Droplet Drying to Spray Drying and Electrospraying

et al. 2020

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Spray drying and electrospraying are well-established drying processes that already have proven their value in the pharmaceutical field. However, there is currently still a lack of knowledge on the fundamentals of the particle formation process, thereby hampering fast and cost-effective particle engineering. To get a better understanding of how functional particles are formed with respect to process and formulation parameters, it is indispensable to offer a comprehensive overview of critical aspects of the droplet drying and particle formation process. This review therefore closely relates single droplet drying to pharmaceutical applications. Although excellent reviews exist of the different aspects, there is, to the best of our knowledge, no single review that describes all steps that one should consider when trying to engineer a certain type of particle morphology. The findings presented in this article have strengthened the predictive value of single droplet drying for pharmaceutical drying applications like spray drying and electrospraying. Continuous follow-up of the particle formation process in single droplet drying experiments hence allows optimization of manufacturing processes and particle engineering approaches and acceleration of process development.

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“…Recently, more advanced optical traps for aerosols utilized counter‐propagating dual beams with equal powers to trap single aerosol particles, where two opposite scattering forces will cancel each other out. Therefore, this dual‐beam configuration allows for using significantly large trapping laser powers (few hundreds mW) for various advanced applications [23a,35] . Recently, Ward et al.…”

Section: Technique Backgroundmentioning

confidence: 99%

Micro‐droplet Trapping and Manipulation: Understanding Aerosol Better for a Healthier Environment

Chang

Devi

Chen

2021

Chemistry An Asian Journal

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Understanding the physicochemical properties and heterogeneous processes of aerosols is key not only to elucidate the impacts of aerosols on the atmosphere and humans but also to exploit their further applications, especially for a healthier environment. Experiments that allow for spatially control of single aerosol particles and investigations on the fundamental properties and heterogeneous chemistry at the single‐particle level have flourished during the last few decades, and significant breakthroughs in recent years promise better control and novel applications aimed at resolving key issues in aerosol science. Here we propose graphene oxide (GO) aerosols as prototype aerosols containing polycyclic aromatic hydrocarbons, and GO can behave as two‐dimensional surfactants which could modify the interfacial properties of aerosols. We describe the techniques of trapping single particles and furthermore the current status of the optical spectroscopy and chemistry of GO. The current applications of these single‐particle trapping techniques are summarized and interesting future applications of GO aerosols are discussed.

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Raman spectroscopy of optically levitated supercooled water droplet

Cited by 38 publications

References 70 publications

Shrinking of Rapidly Evaporating Water Microdroplets Reveals their Extreme Supercooling

Shrinking of Rapidly Evaporating Water Microdroplets Reveals their Extreme Supercooling

Unraveling Particle Formation: From Single Droplet Drying to Spray Drying and Electrospraying

Micro‐droplet Trapping and Manipulation: Understanding Aerosol Better for a Healthier Environment

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