Dynamics of self-organized aggregation of resonant nanoparticles in a laser field

Slabko, V. V.; Tsipotan, A. S.; Aleksandrovsky, A.S.; Slyusareva, E. A.

doi:10.1007/s00340-014-5831-0

Cited by 12 publications

(22 citation statements)

References 29 publications

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“…Therefore, laser-induced interparticle interaction can lead to the aggregation and formation of nanostructures with the configuration dictated by external field. [12][13][14][15]. We will also suppose that interparticle distance is much smaller than the wavelength of laser field, that allows to consider this filed as homogeneous, and retardation can be neglected.…”

Section: The Model Of Nanoparticles' Interaction In the Laser Radiatimentioning

confidence: 99%

“…The method allows to form structures with desired pre-defined geometry from several nanoparticles of different materials in the course of multistage self-assembly process. In the following, using the mathematical modeling methods, the influence of the phase difference of induced dipole moments [14], and of the height of the barrier preventing from spontaneous aggregation [15] were studied.…”

mentioning

confidence: 99%

“…Electromagnetic interaction of nanoparticles induced by laser irradiation was earlier considered in the single-resonance approximation [12][13][14][15] This approach is justified for metal particles with surface plasmon resonance [21]. Formation of pre-defined nanostructures of semiconducting quantum dots (QD) [22], and dielectric nanoparticles with resonant rare earth or transition metal dopants [23] is more prospective.…”

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confidence: 99%

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Laser-induced Interaction of Multilevel Quantum Dots

Glushkov¹,

Slyusareva²,

Aleksandrovsky³

et al. 2017

J. Sib. Fed. Univ., Math. phys.

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A theoretical model is developed for describing the laser-induced interaction of a pair of multilevel semiconductor quantum dots. Spectral dependencies of interaction energy are calculated in dipole-dipole approximation for a pair of CdSe quantum dots in a quasi-resonant laser field, for cases of two identical quantum dots and those with differing transition wavelengths. Interaction energy of pair of multilevel quantum dots in the long-wavelength potential well is much higher than that of pair of two-level quantum dots. The increase of difference of resonance wavelengths of two interacting quantum dots leads to decrease of the potential well depth.

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Section: The Model Of Nanoparticles' Interaction In the Laser Radiatimentioning

confidence: 99%

mentioning

confidence: 99%

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confidence: 99%

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Laser-induced Interaction of Multilevel Quantum Dots

Glushkov¹,

Slyusareva²,

Aleksandrovsky³

et al. 2017

J. Sib. Fed. Univ., Math. phys.

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“…It can be seen from Equation (39) as time elapses, the boundary smears out until the concentration gradient vanishes consequently, the broadening of the Gaussian function occurs. Self-assembly of NPS under influence of electromagnetic field with the frequencies in the optical range has been studied by Park et al [53] and as suggested by Slabko et al [54], when NPs are irradiated by the laser radiation, dipole moment is induced which enhances the formation of structural geometry hence forming an agglomeration. In our case, the downward motion of the agglomerates is demonstrated by FITC fluorescence.…”

Section: ) Heat Generationmentioning

confidence: 99%

Dynamics Study and Analysis of Laser-Induced Transport of Nanoferrofluid in Water Using Fluorescein Isothiocyanate (FITC) as Fluorescence Marker

Khosroshahi¹,

Asemani²

2017

JMP

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FITC-conjugated nanoferrofluid (FNFF) was synthesized and characterized to study the dynamic of laser-induced transport of NPs in water. The results confirmed a definite laser-induced enhanced velocity of NPs (100 μm·s without and with laser action respectively. The act of laser when switched on after NPs had reached the steady state was very prominent. The laser-induced heat and power generated by NPs were calculated 0.2 μW·cm −3 and 0.4 pW·cm −2 respectively. Our experiment condition was non-adiabatic and that the heat generated was diffused into the surrounding. We considered the Maxwell's criteria (Kp/Kw < 10) for FNFF thermal conductivity and found a value of 1.2 Wm. Based on the Brownian diffusion and DLVO theory, at earlier times where the NPs are more dispersed within the medium are displaced faster. However, at later stages they become less mobile as they are agglomerated. The mechanisms for the enhanced mobility and laser transport of NPs are thought to be due to e.m.w induced force (i.e. an oscillatory motion) and laser absorptive force (i.e., photothermophoresis). A beam divergence of about 5.24˚ (or 91 mrad) was determined. A non-linear behaviour of laser beam was observed as a trajectory path within the water due to thermal heating hence causing the change of refractive index of medium and redistribution of NPs concentration.

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“…Investigation of laser induced self-assembly is extremely attractive since electrodynamical interactions between nanoparticles are rather universal and in principle allow self-assembly of semiconductor QDs of different kind or self assembly of nanostructures containing both metal and semiconductor constituents ath the sub-wavelength scale. Recent theoretical studies [14,15] directly addressed to the proposed experiments provide the tool for predicting the results of laser-induced self-assembly within the colloid solutions of QDs. Main predictions of these studies are as follows.…”

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confidence: 99%

Laser-induced wavelength-controlled self-assembly of colloidal quasi-resonant quantum dots

Tsipotan¹,

Gerasimova²,

Slabko³

et al. 2016

Opt. Express

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1. Introduction Irradiation of ensembles of micro-and nanoparticles with optical radiation leads to various effects allowing the control of their motion. One of these effects is optical binding, being the effect based on optically induced interaction between particles [1], in contrast to optical trapping [2,3] which is based on forces raised from interaction of individual particles with light. In optical binding effect, electric field of a light wave polarizes particles, and ac polarizations of particles interact each other. For interparticle distances much smaller than the wavelength this can be treated as the local field effect, i.e. external ac electric field acting onto individual particle becomes modified by the account of the field produced by neighboring particles. Optically induced interaction of particles becomes noticeable at certain level of light intensity when the potential energy associated with this interaction is comparable with kinetic energy of Brownian motion or with the potential energy of a barrier typically used to stabilize colloid solutions of NPs' ensembles. In recent studies, the most attention was devoted to the investigation of metallic NPs interacting with light. Particularly, calculation technique for modeling the dynamics of metal NPs was elaborated [4]. High precision manipulation of multiple metallic NPs using optical binding force induced by off-resonant low-power laser was recently demonstrated at distances up to several microns [5]. Alternatively, self-assembly of metal NPS at the subwavelength scale due to plasmonic interaction was obtained under strong off-resonant cw laser illumination, as was deduced from Raman and Rayleigh scattering [6]. Somehow similar result was observed in [7] where hybridization of metal NPs plasmonic resonance was observed in scattering when NPs were confined in an optical trap. Employing the plasmonic resonance of metal NPs with the laser frequency is widely recognized as means for enhancement of optically induced interaction between metallic NPs, as theoretically investigated [8,9]. Moreover, it was shown in these two papers that formation of NPs' clusters with pre-defined geometry is possible via proper choice of laser wavelength and polarization. Characteristic potential well depths for silver NPs, according to [9], are less than ten energies of thermal motion at laser field strengths close to metal NPs' breakdown threshold. More deep potential wells could be obtained when NPs with narrower resonant widths are under the self-assembly. Resonant widths of excitons in semiconductor QDs are two orders of magnitude narrower than plasmonic resonances in metals [10]. Formation of QDs' structures under optical irradiation due to various non-electrodynamical mechanisms were studied, e.g. in [11][12][13]. Surprisingly, no experimental attempts were done up to date to perform electrodynamically-driven laser-induced self-assembly of semiconductor nanoparticles, that may be of interest for quantum information, spintronics, single-electron transport, and sens...

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Dynamics of self-organized aggregation of resonant nanoparticles in a laser field

Cited by 12 publications

References 29 publications

Laser-induced Interaction of Multilevel Quantum Dots

Laser-induced Interaction of Multilevel Quantum Dots

Dynamics Study and Analysis of Laser-Induced Transport of Nanoferrofluid in Water Using Fluorescein Isothiocyanate (FITC) as Fluorescence Marker

Laser-induced wavelength-controlled self-assembly of colloidal quasi-resonant quantum dots

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