Trapping and Deposition of Dye–Molecule Nanoparticles in the Nanogap of a Plasmonic Antenna

Pin, Christophe; Ishida, Shuichi; Takahashi, Genta; Sudo, Kota; Fukaminato, Tuyoshi; Sasaki, Keiji

doi:10.1021/acsomega.8b00282

Cited by 40 publications

(27 citation statements)

References 49 publications

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“…Therefore, the "grip" exerted on nanomaterials by plasmonic optical tweezers or plasmonic optical trapping (POT) should be very strong [16][17][18] . Following early demonstrations, POT has undergone rapid growth, and has been used to trap various nanomaterials such as polymer beads 10,[19][20][21][22][23][24][25][26][27] , metallic nanoparticles 12,18 , quantum dots 13,28,29 , dye aggregates 30,31 , and so on. In addition to these hard nanospheres, we have demonstrated that POT is also applicable to soft materials such as flexible polymer chains homogeneously dissolved in water 32,33 .…”

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confidence: 99%

Plasmonic Manipulation of DNA using a Combination of Optical and Thermophoretic Forces: Separation of Different-Sized DNA from Mixture Solution

Tanaka

Itoh

Saitoh

et al. 2020

Sci Rep

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We demonstrate the size-dependent separation and permanent immobilization of DNA on plasmonic substrates by means of plasmonic optical tweezers. We found that a gold nanopyramidal dimer array enhanced the optical force exerted on the DNA, leading to permanent immobilization of the DNA on the plasmonic substrate. The immobilization was realized by a combination of the plasmon-enhanced optical force and the thermophoretic force induced by a photothermal effect of the plasmons. In this study, we applied this phenomenon to the separation and fixation of size-different DNA. During plasmon excitation, DNA strands of different sizes became permanently immobilized on the plasmonic substrate forming micro-rings of DNA. The diameter of the ring was larger for longer DNA (in base pairs). When we used plasmonic optical tweezers to trap DNA of two different lengths dissolved in solution (ϕx DNA (5.4 kbp) and λ-DNA (48.5 kbp), or ϕx DNA and T4 DNA (166 kbp)), the DNA were immobilized, creating a double micro-ring pattern. The DNA were optically separated and immobilized in the double ring, with the shorter sized DNA and the larger one forming the smaller and larger rings, respectively. This phenomenon can be quantitatively explained as being due to a combination of the plasmon-enhanced optical force and the thermophoretic force. Our plasmonic optical tweezers open up a new avenue for the separation and immobilization of DNA, foreshadowing the emergence of optical separation and fixation of biomolecules such as proteins and other ncuelic acids. DNA has been the main target for optical trapping and manipulation. This is very important in medical science and biological physics, and numerous studies have been carried out so far. With conventional optical tweezers simply using a focused laser beam (developed by Arthur Ashkin 1-4), it is rather difficult to optically trap DNA in aqueous solutions containing hydrated random coil structures because of their small polarizability 5. In many cases, small dielectric microspheres are connected to the head and end groups of the DNA, and a focused laser beam optically manipulates these microspheres 6-9. This technique for DNA manipulation has stimulated extensive development in DNA biophysics. Recently, a breakthrough was achieved in the research field of optical tweezers 10-15. This is based on surface plasmons localized around metallic nanostructures. The surface plasmons lead to an electric field (E) enhancement effect of the incident light which amplifies the optical force (F g , gradient force) and hence the optical trapping potential (U):

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confidence: 99%

Plasmonic Manipulation of DNA using a Combination of Optical and Thermophoretic Forces: Separation of Different-Sized DNA from Mixture Solution

Tanaka

Itoh

Saitoh

et al. 2020

Sci Rep

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“…On the contrary, dielectric particles such as polystyrene or biomaterials have small polarizability and are still difficult to be stably trapped. Given such a situation, some non-standard optical trapping techniques, such as plasmonic optical tweezers (Shoji and Tsuboi 2014;Ndukaife et al 2018;Pin et al 2018) or thermophoretic manipulation induced by photothermal effects (Duhr and Braun 2006;Jiang et al 2009;Maeda et al 2012;Lin et al 2018;, have been proposed. These non-standard optical trapping techniques can be combined with the present flow control concept in nanofluidic device to achieve more stable performance.…”

Section: Discussionmentioning

confidence: 99%

Flow with nanoparticle clustering controlled by optical forces in quartz glass nanoslits

Tsuji

Matsumoto

2019

Microfluid Nanofluid

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In this paper, we demonstrate nanoparticle flow control using an optical force in a confined nanospace. Using nanofabrication technologies, all-quartz-glass nanoslit channels with a sudden contraction are developed. Because the nanoslit height is comparable to the nanoparticle diameter, the motion of particles is restricted in the channel height direction, resulting in almost two-dimensional particle motion. The laser irradiates at the entrance of the sudden contraction channel, leading the trapped nanoparticles to form a cluster. As a result, the translocation of nanoparticles into the contraction channel is suppressed. Because the particle translocation restarts when the laser irradiation is stopped, we can control the nanoparticle flow into the contraction channel by switching the trapping and release of particles, realizing an intermittent flow of nanoparticles. Such a particle flow control technique in a confined nanospace is expected to improve the functions of nanofluidic devices by transporting a target material selectively to a desired location in the device.Publisher's Note Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

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“…Thermo-osmotic flows result from the surface tension gradient induced by a temperature gradient at the interface between a liquid and a substrate. Owing to the high temperature in a nanoscale region, a thermo-osmotic flow might be generated, which draws surrounding particles towards the heat source [79][80][81] .…”

Section: Plasmonic-thermal Effectsmentioning

confidence: 99%

Plasmonic tweezers: for nanoscale optical trapping and beyond

et al. 2021

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Optical tweezers and associated manipulation tools in the far field have had a major impact on scientific and engineering research by offering precise manipulation of small objects. More recently, the possibility of performing manipulation with surface plasmons has opened opportunities not feasible with conventional far-field optical methods. The use of surface plasmon techniques enables excitation of hotspots much smaller than the free-space wavelength; with this confinement, the plasmonic field facilitates trapping of various nanostructures and materials with higher precision. The successful manipulation of small particles has fostered numerous and expanding applications. In this paper, we review the principles of and developments in plasmonic tweezers techniques, including both nanostructure-assisted platforms and structureless systems. Construction methods and evaluation criteria of the techniques are presented, aiming to provide a guide for the design and optimization of the systems. The most common novel applications of plasmonic tweezers, namely, sorting and transport, sensing and imaging, and especially those in a biological context, are critically discussed. Finally, we consider the future of the development and new potential applications of this technique and discuss prospects for its impact on science.

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Trapping and Deposition of Dye–Molecule Nanoparticles in the Nanogap of a Plasmonic Antenna

Cited by 40 publications

References 49 publications

Plasmonic Manipulation of DNA using a Combination of Optical and Thermophoretic Forces: Separation of Different-Sized DNA from Mixture Solution

Plasmonic Manipulation of DNA using a Combination of Optical and Thermophoretic Forces: Separation of Different-Sized DNA from Mixture Solution

Flow with nanoparticle clustering controlled by optical forces in quartz glass nanoslits

Plasmonic tweezers: for nanoscale optical trapping and beyond

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