Single droplet formation and crystal growth in urea solution induced by laser trapping

Yuyama, Ken‐ichi; Ishiguro, Kei; Rungsimanon, Thitiporn; Sugiyama, Teruki; Masuhara, Hiroshi

doi:10.1117/12.860241

Cited by 3 publications

(5 citation statements)

References 21 publications

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“…One of the essential factors to trigger nucleation is a focal position of the trapping laser. Similar to our previous works, nucleation is triggered only upon focusing the trapping laser at an air/solution interface also in this work . Optical trapping is based on the gradient force of a focused laser beam (see section ), and the trapping force is proportional to the volume and refractive index of a target.…”

Section: Discussionmentioning

confidence: 84%

“…Similar to our previous works, nucleation is triggered only upon focusing the trapping laser at an air/solution interface also in this work. 35 Optical trapping is based on the gradient force of a focused laser beam (see section 2.2), and the trapping force is proportional to the volume and refractive index of a target. Therefore, a single small molecule is considerably difficult to be trapped stably at laser focus.…”

Section: Discussionmentioning

confidence: 99%

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Evolving Crystal Morphology of Potassium Chloride Controlled by Optical Trapping

Cheng¹,

Masuhara²,

Sugiyama

2020

J. Phys. Chem. C

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Dynamic morphology evolution of potassium chloride (KCl) crystals was demonstrated by surface optical trapping with a focused continuous-wave near-infrared laser. Optical trapping at an air/solution interface triggered the crystallization, and then, the dynamic change in crystal morphology was observed in real time. We observed three different crystal morphologies of needle, rectangle, and cubic at the early stage of crystallization. As the laser power increases, the probability of generation of a cubic crystal increases, especially upon the irradiation with linear polarization. We also found laser polarization-dependent morphology evolution by the continuous irradiation to the generated crystals. Upon linearly polarized laser irradiation, the stepwise morphology evolves from needle to rectangle, and eventually to cubic, which is an equilibrium shape of KCl crystals. Meanwhile, circularly polarized laser irradiation only induced morphology evolution from needle to rectangle, without morphology change into cubic, because the rectangle crystal was dissolved while the crystal was rotating. It was made possible to observe such a unique morphological evolution due to the spatiotemporal controllability of our crystallization method. The dynamics and mechanism of these intriguing phenomena are discussed from the perspective of a dense cluster domain formed by optical trapping before nucleation.

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Section: Discussionmentioning

confidence: 84%

Section: Discussionmentioning

confidence: 99%

Evolving Crystal Morphology of Potassium Chloride Controlled by Optical Trapping

Cheng¹,

Masuhara²,

Sugiyama

2020

J. Phys. Chem. C

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“…Yuyama et al studied laser trapping of urea in heavy water for different saturations (0.28 and 1.36) at room temperature, with a 1064 nm continuous-wave linearly polarized laser beam at 1.1 W power. By focusing the laser at the glass-solution interface, for the undersaturated solution, the formation of concentrated droplets was observed, as previously reported for glycine. , However, no crystallization was observed, regardless of the focal point position.…”

Section: Laser Trapping-induced Crystallization (Ltic)mentioning

confidence: 99%

“…Therefore, the domain is only visible because the crystallization is hindered by the temperature increase; otherwise, nucleation would take place faster due to the concentration increase. Yuyama et al 127 studied laser trapping of urea in heavy water for different saturations (0.28 and 1.36) at room temperature, with a 1064 nm continuous-wave linearly polarized laser beam at 1.1 W power. By focusing the laser at the glass-solution interface, for the undersaturated solution, the formation of concentrated droplets was observed, as previously reported for glycine.…”

Section: Experimental Setupsmentioning

confidence: 99%

A Review of Laser-Induced Crystallization from Solution

Vikram

Nagaraj

Marques

et al. 2023

Crystal Growth & Design

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Crystallization abounds in nature and industrial practice. A plethora of indispensable products ranging from agrochemicals and pharmaceuticals to battery materials are produced in crystalline form in industrial practice. Yet, our control over the crystallization process across scales, from molecular to macroscopic, is far from complete. This bottleneck not only hinders our ability to engineer the properties of crystalline products essential for maintaining our quality of life but also hampers progress toward a sustainable circular economy in resource recovery. In recent years, approaches leveraging light fields have emerged as promising alternatives to manipulate crystallization. In this review article, we classify laser-induced crystallization approaches where light-material interactions are utilized to influence crystallization phenomena according to proposed underlying mechanisms and experimental setups. We discuss nonphotochemical laser-induced nucleation, high-intensity laser-induced nucleation, laser trapping-induced crystallization, and indirect methods in detail. Throughout the review, we highlight connections among these separately evolving subfields to encourage the interdisciplinary exchange of ideas.

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“…Yuyama et al 125 studied laser trapping of urea in heavy water for different saturations (0.28 and 1.36) at room temperature, with a 1064 nm continuous-wave linearly polarized laser beam at 1.1 W power. By focusing the laser at the glass-solution interface, for the undersaturated solution, the formation of concentrated droplets was observed, as previously reported for glycine.…”

Section: Reported Solutions 441 Small Organic Moleculesmentioning

confidence: 99%

A review on laser-induced crystallization from solution

Vikram¹,

Nagaraj²,

Marques³

et al. 2023

Preprint

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Crystallization is abound in nature and industrial practice. A plethora of indispensable products ranging from agrochemicals and pharmaceuticals to battery materials, are produced in crystalline form in industrial practice. Yet, our control over the crystallization process across scales, from molecular to macroscopic, is far from complete. This bottleneck not only hinders our ability to engineer the properties of crystalline products essential for maintaining our quality of life but also hampers progress toward a sustainable circular economy in resource recovery. In recent years, approaches leveraging light fields have emerged as promising alternatives to manipulate crystallization. In this review article, we classify laser-induced crystallization approaches where light-material interactions are utilized to influence crystallization phenomena according to proposed underlying mechanisms and experimental setups. We discuss non-photochemical laser-induced nucleation, high-intensity laser-induced nucleation, laser trapping-induced crystallization, and indirect methods in detail. Throughout the review, we highlight connections amongst these separately evolving sub-fields to encourage interdisciplinary exchange of ideas.

show abstract

Single droplet formation and crystal growth in urea solution induced by laser trapping

Cited by 3 publications

References 21 publications

Evolving Crystal Morphology of Potassium Chloride Controlled by Optical Trapping

Evolving Crystal Morphology of Potassium Chloride Controlled by Optical Trapping

A Review of Laser-Induced Crystallization from Solution

A review on laser-induced crystallization from solution

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