Potential energy surfaces and reaction pathways for light-mediated self-organization of metal nanoparticle clusters

Yan, Zijie; Gray, Stephen K.; Scherer, Norbert F.

doi:10.1038/ncomms4751

Cited by 93 publications

(144 citation statements)

References 39 publications

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“…94 Diatrack has also been used several times in nano-manufacturing applications to precisely position gold nanoparticles on surfaces using optical traps. 95–99 Tracking of nanoparticles was also exploited by Liu et al to monitor the motion of exoglucanases along cellulose fibers. 100 Tracking of functionalized quantum dots – another type of nanoparticles - as they penetrated cells and their nuclei was demonstrated by Kuo et al 101 …”

Section: Survey Of Applicationsmentioning

confidence: 99%

Diatrack particle tracking software: Review of applications and performance evaluation

Vallotton

Oijen

Whitchurch

et al. 2017

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Object tracking is an instrumental tool supporting studies of cellular trafficking. There are three challenges in object tracking: the identification of targets; the precise determination of their position and boundaries, and the assembly of correct trajectories. This last challenge is particularly relevant when dealing with densely populated images with low signal-to-noise ratios - conditions that are often encountered in applications such as organelle tracking, virus particle tracking, or single-molecule imaging. We have developed a set of methods that can handle a wide variety of signal complexities. They are compiled into a free software package called Diatrack. Here we review its main features and utility in a range of applications, providing a survey of the dynamic imaging field together with recommendations for effective use. The performance of our framework is shown to compare favorably to a wide selection of custom-developed algorithms, whether in terms of localization precision, processing speed, or correctness of tracks.

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Section: Survey Of Applicationsmentioning

confidence: 99%

Diatrack particle tracking software: Review of applications and performance evaluation

Vallotton

Oijen

Whitchurch

et al. 2017

Traffic

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“…As previously shown [46,47,57], Ag nanoparticles interact electrodynamically via optical binding; a periodic modulation of the electric field in the vicinity of the nanoparticle resulting from interference of the incident field and the scattered field from each particle. The strength and spatial aspects of optical binding depend on the polarization of the incident beam [46].…”

Section: Electrodynamic Interparticle Interactionsmentioning

confidence: 99%

Driven optical matter: Dynamics of electrodynamically coupled nanoparticles in an optical ring vortex

et al. 2017

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To date investigations of the dynamics of driven colloidal systems have focused on hydrodynamic interactions and often employ optical (laser) tweezers for manipulation. However, the optical fields that provide confinement and drive also result in electrodynamic interactions that are generally neglected. We address this issue with a detailed study of interparticle dynamics in an optical ring vortex trap using 150 nm diameter Ag nanoparticles. We term the resultant electrodynamically interacting nanoparticles a driven optical matter system. We also show that a superior trap is created by using a Au nanoplate mirror in a retro-reflection geometry, which increases the electric field intensity, the optical drive force, and spatial confinement. Using nanoparticles versus micron sized colloids significantly reduces the surface hydrodynamic friction allowing us to access small values of optical topological charge and drive force. We quantify a further 50% reduction of hydrodynamic friction when the nanoparticles are driven over the Au nanoplate mirrors versus over a mildly electrostatically repulsive glass surface. Further, we demonstrate through experiments and electrodynamics-Langevin dynamics (ED-LD) simulations that the optical drive force and the interparticle interactions are not constant around the ring for linearly polarized light, resulting in a strong position-dependent variation in the nanoparticle velocity. The nonuniformity in the optical drive force is also manifest as an increase in fluctuations of interparticle separation, or effective temperature, as the optical driving force is increased. Finally, we resolve an open issue in the literature on periodic modulation of interparticle separation with comparative measurements of driven 300 nm diameter polystyrene beads that also clearly reveal the significance of electrodynamic forces and interactions in optically driven colloidal systems. Therefore, the modulations in the optical forces and electrodynamic interactions that we demonstrate should not be neglected for dielectric particles and might give rise to some structural and dynamic features that have previously been attributed exclusively to hydrodynamic interactions.

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“…Arguably the most well-known application of the theory is the formulation of the Casimir-Polder potential [47]-which takes due account of retardation effects. Contemporary examples of the spheres of application include optical trapping [48][49][50][51][52] optical binding [53][54][55][56][57][58], and optical vortices [59][60][61][62], to name but a few.…”

Section: Theoretical Foundationmentioning

confidence: 99%

Quantum delocalization in photon-pair generation

et al. 2017

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The generation of correlated photon pairs is a key to the production of entangled quantum states, which have a variety of applications within the area of quantum information. In spontaneous parametric down-conversion-the primary method of generating correlated photon pairs-the associated photon annihilation and creation events are generally thought of as being colocated: The correlated pair of photons is localized with regards to the pump photon and its positional origin. A detailed quantum electrodynamical analysis highlights a mechanism exhibiting the possibility of a delocalized origin for paired output photons: The spatial extent of the region from which the pair is generated can be much larger than previously thought. The theory of both localized and nonlocalized degenerate down-conversion is presented, followed by a quantitative analysis using discrete-volume computational methods. The results may have significant implications for quantum information and imaging applications, and the design of nonlinear optical metamaterials.

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Potential energy surfaces and reaction pathways for light-mediated self-organization of metal nanoparticle clusters

Cited by 93 publications

References 39 publications

Diatrack particle tracking software: Review of applications and performance evaluation

Diatrack particle tracking software: Review of applications and performance evaluation

Driven optical matter: Dynamics of electrodynamically coupled nanoparticles in an optical ring vortex

Quantum delocalization in photon-pair generation

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