Investigation of Dust Grains by Optical Tweezers for Space Applications

Magazzù, Alessandro; Ciriza, David Bronte; Musolino, Anna; Saidi, A.; Polimeno, P.; Donato, M. G.; Foti, Antonino; Gucciardi, P. G.; Iatí, Maria Antonia; Saija, Rosalba; Perchiazzi, Natale; Rotundi, A.; Folco, Luigi; Maragó, Onofrio M.

doi:10.3847/1538-4357/ac9a45

Cited by 4 publications

(5 citation statements)

References 64 publications

(83 reference statements)

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“…Moreover, RT was also used to trap and chemically analyze individual tire and road wear particles in liquid environments [ 218 ], detect microplastic polymers in seawater [ 219 ] and aid in the identification and subsequent classification of marine bacteria based on their cell phenotypes [ 220 ]. Recently, RT was also used to investigate single grains of cosmic dust [ 196 ]. Finally, force-induced mechanical balance data of soft matter obtained by OT can be compared by complementary techniques such as micropipette aspiration system with stimulated emission depletion (STED) microscopy [ 221 ].…”

Section: Discussion and Future Perspectivesmentioning

confidence: 99%

“…Optical tweezers can also transfer angular momentum from a polarized laser beam to birefringent or chiral trapped particles inducing toques on them and causing them to rotate [ 156 , 193 , 194 , 195 , 196 ]. Recently, an OT-based setup was used to measure the shear viscosity of the macropinosome of a living macrophage cell in vivo by transferring spin angular momentum to a vaterite birefringent micro-particle internalized by the cell, Figure 7 d [ 194 ].…”

Section: Recent Examples Of Elastic Properties Addressed On Soft Matt...mentioning

confidence: 99%

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Investigation of Soft Matter Nanomechanics by Atomic Force Microscopy and Optical Tweezers: A Comprehensive Review

Magazzù

Marcuello

2023

Nanomaterials

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Soft matter exhibits a multitude of intrinsic physico-chemical attributes. Their mechanical properties are crucial characteristics to define their performance. In this context, the rigidity of these systems under exerted load forces is covered by the field of biomechanics. Moreover, cellular transduction processes which are involved in health and disease conditions are significantly affected by exogenous biomechanical actions. In this framework, atomic force microscopy (AFM) and optical tweezers (OT) can play an important role to determine the biomechanical parameters of the investigated systems at the single-molecule level. This review aims to fully comprehend the interplay between mechanical forces and soft matter systems. In particular, we outline the capabilities of AFM and OT compared to other classical bulk techniques to determine nanomechanical parameters such as Young’s modulus. We also provide some recent examples of nanomechanical measurements performed using AFM and OT in hydrogels, biopolymers and cellular systems, among others. We expect the present manuscript will aid potential readers and stakeholders to fully understand the potential applications of AFM and OT to soft matter systems.

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Section: Discussion and Future Perspectivesmentioning

confidence: 99%

Section: Recent Examples Of Elastic Properties Addressed On Soft Matt...mentioning

confidence: 99%

Investigation of Soft Matter Nanomechanics by Atomic Force Microscopy and Optical Tweezers: A Comprehensive Review

Magazzù

Marcuello

2023

Nanomaterials

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“…59 On the other hand, this type of computational approach is extremely general and flexible and opens perspectives for many other applications from the nanoscale 3 to space applications. 60,61 ■ ASSOCIATED CONTENT…”

Section: ■ Conclusionmentioning

confidence: 99%

Faster Calculations of Optical Trapping Using Neural Networks Trained by T-Matrix Data: An Application to Micro- and Nanoplastics

Rezaei,

Bronte Ciriza,

Hassanzadeh

et al. 2024

ACS Photonics

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We employ neural networks to improve and speed up optical force calculations for dielectric particles. The network is first trained on a limited set of data obtained through accurate light scattering calculations, based on the transition matrix (T-matrix) method, and then is used to explore a wider range of particle dimensions, refractive indices, and excitation wavelengths. This computational approach is very general and flexible. Here, we focus on its application in the context of micro- and nanoplastics, a topic of growing interest in the past decade due to their widespread presence in the environment and potential impact on human health and the ecosystem.

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“…The direction of rotation can be controlled by adjusting the beam’s polarization or phase gradients. Second, for asymmetric particles, the scattering generates an optical torque ,− where the direction of rotation is fixed by the scattering pattern (windmill effect) and determined by the particle’s shape. This effect has also been observed for metal-dielectric Janus particles, , highlighting the relevance of both light scattering and thermal effects …”

Section: Introductionmentioning

confidence: 99%

Optically Driven Janus Microengine with Full Orbital Motion Control

Bronte Ciriza,

Callegari,

Donato

et al. 2023

ACS Photonics

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Microengines have shown promise for a variety of applications in nanotechnology, microfluidics, and nanomedicine, including targeted drug delivery, microscale pumping, and environmental remediation. However, achieving precise control over their dynamics remains a significant challenge. In this study, we introduce a microengine that exploits both optical and thermal effects to achieve a high degree of controllability. We find that in the presence of a strongly focused light beam, a gold-silica Janus particle becomes confined at the stationary point where the optical and thermal forces balance. By using circularly polarized light, we can transfer angular momentum to the particle, breaking the symmetry between the two forces and resulting in a tangential force that drives directed orbital motion. We can simultaneously control the velocity and direction of rotation of the particle changing the ellipticity of the incoming light beam while tuning the radius of the orbit with laser power. Our experimental results are validated using a geometrical optics phenomenological model that considers the optical force, the absorption of optical power, and the resulting heating of the particle. The demonstrated enhanced flexibility in the control of microengines opens up new possibilities for their utilization in a wide range of applications, including microscale transport, sensing, and actuation.

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Investigation of Dust Grains by Optical Tweezers for Space Applications

Cited by 4 publications

References 64 publications

Investigation of Soft Matter Nanomechanics by Atomic Force Microscopy and Optical Tweezers: A Comprehensive Review

Investigation of Soft Matter Nanomechanics by Atomic Force Microscopy and Optical Tweezers: A Comprehensive Review

Faster Calculations of Optical Trapping Using Neural Networks Trained by T-Matrix Data: An Application to Micro- and Nanoplastics

Optically Driven Janus Microengine with Full Orbital Motion Control

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