Chiral templating of self-assembling nanostructures by circularly polarized light

Yeom, Jihyeon; Yeom, Bongjun; Chan, Henry; Smith, Kyle W.; Domínguez-Medina, Sergio; Bahng, Joong Hwan; Zhao, Gongpu; Chang, Wei Shun; Chang, Sekchin; Chuvilin, Andrey; Melnikau, Dzmitry; Rogach, Andrey L.; Zhang, Peijun; Link, Stephan; Král, Petr; Kotov, Nicholas A.

doi:10.1038/nmat4125

Cited by 365 publications

(414 citation statements)

References 32 publications

(39 reference statements)

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“…4(E)). The helical thermocapillary melt flows within the evolving nanojet and surrounding microbump area possibly can originate from the corresponding characteristic spiral-like (or more complex, [9]) intensity distribution. The origin of such spiralshaped intensity distribution and corresponding temperature profile on the metal film surface can be explained in terms of optical interference of the incident donutshaped beam with the spherical wave reflected/scattered from the evolving surface profile of the molten metal film.…”

Section: Resultsmentioning

confidence: 99%

“…Recently, in a number of papers an alternative pioneering approach, employing optical radiation with specially designed intensity-, polarization-or phase states, was proposed for fabrication of chiral structures [9][10][11][12][13][14][15][16][17][18][19]. In particular, using inherent chirality of nanoparticles, synthesis of twisted nanoribbons through self-assembly in water solution under irradiation with continuous-wave circularly polarized laser radiation was demonstrated * alex.iacp.dvo@mail.ru [9].…”

Section: Introductionmentioning

confidence: 99%

“…In particular, using inherent chirality of nanoparticles, synthesis of twisted nanoribbons through self-assembly in water solution under irradiation with continuous-wave circularly polarized laser radiation was demonstrated * alex.iacp.dvo@mail.ru [9]. More importantly, vortex laser pulses, carrying simultaneously orbital (OAM) and spin (SAM) angular momenta, were demonstrated to twist transiently molten metal producing chiral-shaped micron-size needles [10,11].…”

Section: Introductionmentioning

confidence: 99%

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Direct laser printing of chiral plasmonic nanojets by vortex beams

et al. 2017

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Donut-shaped laser radiation, carrying orbital angular momentum, namely optical vortex, recently was shown to provide vectorial mass transfer, twisting transiently molten material and producing chiral micro-scale structures on surfaces of different bulk materials upon their resolidification. In this paper, we show for the first time that nanosecond laser vortices can produce chiral nanoneedles (nanojets) of variable size on thin films of such plasmonic materials, as silver and gold films, covering thermally insulating substrates. Main geometric parameters of the produced chiral nanojets, such as height and aspect ratio, were shown to be tunable in a wide range by varying metal film thickness, supporting substrates, and the optical size of the vortex beam. Donut-shaped vortex nanosecond laser pulses, carrying two vortices with opposite handedness, were demonstrated to produce two chiral nanojets twisted in opposite directions. The results provide new important insights into fundamental physics of the vectorial laser-beam assisted mass transfer in metal films and demonstrate the great potential of this technique for fast easy-to-implement fabrication of chiral plasmonic nanostructures.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Direct laser printing of chiral plasmonic nanojets by vortex beams

et al. 2017

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“…Current research on the mechanism of homochirality mainly focuses on chiral recognition and chiral selection through studies of chirality transfer and amplification induced by chemical reactions, force fields 3,[6][7][8][9][10][11][12] , physical properties of solid samples (including crystallization) [13][14][15] , amino-acid clustering in gas phase 16 , molecular interaction on surfaces [17][18][19][20] and supramolecular assemblies of chiral molecules in bulk and solutions [21][22][23][24][25][26][27][28][29][30] . A few sketchy theories have been developed to explain how homochirality originated, was amplified in macromolecules and supramolecular assemblies and was transmitted to other biomolecules/assemblies during the evolution of life 2,31 .…”

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confidence: 99%

Chiral recognition and selection during the self-assembly process of protein-mimic macroanions

Yin

Zhang

et al. 2015

Nat Commun

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The research on chiral recognition and chiral selection is not only fundamental in resolving the puzzle of homochirality, but also instructive in chiral separation and stereoselective catalysis. Here we report the chiral recognition and chiral selection during the self-assembly process of two enantiomeric wheel-shaped macroanions, [Fe 28 The enantiomers are observed to remain self-sorted and self-assemble into their individual assemblies in their racemic mixture solution. The addition of chiral co-anions can selectively suppress the self-assembly process of the enantiomeric macroanions, which is further used to separate the two enantiomers from their mixtures on the basis of the size difference between the monomers and the assemblies. We believe that delicate long-range electrostatic interactions could be responsible for such high-level chiral recognition and selection.

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“…Even if chiral forces such as circularly polarized light [13] are present, or when assembling naturally handed viruses [14], bacteria [15] or nanoparticles with pre-sorted chiral coatings [16], or even by judiciously designing chiral building blocks [17][18][19][20], the final chiral structures have, so far, been restricted to liquid crystalline and low-dimensional arrangements. Growth of three-dimensional homochiral colloidal crystals has yet to be demonstrated.…”

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confidence: 99%

Controlling Chirality of Entropic Crystals

et al. 2015

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Colloidal crystal structures with complexity and diversity rivaling atomic and molecular crystals have been predicted and obtained for hard particles by entropy maximization. However, so far homochiral colloidal crystals, which are candidates for photonic metamaterials, are absent. Using Monte Carlo simulations we show that chiral polyhedra exhibiting weak directional entropic forces self-assemble either an achiral crystal or a chiral crystal with limited control over the crystal handedness. Building blocks with stronger faceting exhibit higher selectivity and assemble a chiral crystal with handedness uniquely determined by the particle chirality. Tuning the strength of directional entropic forces by means of particle rounding or the use of depletants allows for reconfiguration between achiral and homochiral crystals. We rationalize our findings by quantifying the chirality strength of each particle, both from particle geometry and potential of mean force and torque diagrams.Controlling -and understanding the origins of-chirality is a major goal in the physical and chemical sciences. It has longstanding implications that range from the design of effective pharmaceuticals to explaining biological homochirality and the beginnings of life [1]. In recent years the expectation that chiral materials can provide a route for photonic metamaterials [2] has renewed the interest in chirality, now from a materials design perspective. A key remaining challenge for the development of metamaterials [3] is the ability to use scalable techniques to create crystals with unique chirality. Of particular importance are enantioselective processes, which select a pre-defined handedness of the crystal, thereby maximizing optical activity. [17][18][19][20], the final chiral structures have, so far, been restricted to liquid crystalline and low-dimensional arrangements. Growth of three-dimensional homochiral colloidal crystals has yet to be demonstrated. In fact, the only examples of chiral crystals with realized applications as polarization sensitive devices [21,22] were fabricated via non-scalable processes such as direct laser writing, hampering large scale production.Recent work has shown that hard polyhedra can selfassemble into a great diversity of crystals, liquid crystals, and quasicrystals via entropy maximization [23][24][25][26][27][28], a mechanism that can be understood as resulting from emergent directional entropic forces (DEFs) between neighboring particles due to crowding [25,29,30]. Even chiral crystals have been assembled. The β-Mn crystal structure with chiral space group P4 1 32 [ Fig. 1a], earlier reported in spheres interacting via an isotropic oscillatory pair potential [31], self-assembles from achiral dodecahedra shapes [27]. However, as expected, the handedness of the crystal could not be controlled and both left-and right-handed crystals were observed with equal probability. Given the ability of entropic interactions to imitate the plethora of complex structures achievable from atomistic interactions, the abs...

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Chiral templating of self-assembling nanostructures by circularly polarized light

Cited by 365 publications

References 32 publications

Direct laser printing of chiral plasmonic nanojets by vortex beams

Direct laser printing of chiral plasmonic nanojets by vortex beams

Chiral recognition and selection during the self-assembly process of protein-mimic macroanions

Controlling Chirality of Entropic Crystals

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