Adhesion layer influence on controlling the local temperature in plasmonic gold nanoholes

Jiang, Quanbo; Rogez, Benoît; Claude, Jean-Benoît; Moreau, Antonin; Lumeau, Julien; Baffou, Guillaume; Wenger, Jérôme

doi:10.1039/c9nr08113e

Cited by 26 publications

(28 citation statements)

References 48 publications

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“…Plasmonics is bound to absorption losses into the metal, which induce a local temperature gradient around the nanostructure. [44][45][46][47][48] This temperature gradient then exerts a thermophoretic force on the nano-object as a consequence of the Ludwig-Soret effect. [49][50][51][52] The main physical principle here is that the thermal gradient generates an interfacial fluid flow at the nano-object surface, which in turn moves the object across the solution.…”

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confidence: 99%

Quantifying the Role of the Surfactant and the Thermophoretic Force in Plasmonic Nano-optical Trapping

et al. 2020

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Plasmonic nano-tweezers use intense electric field gradients to generate optical forces able to trap nano-objects in liquids. However, part of the incident light is absorbed into the metal, and a supplementary thermophoretic force acting on the nano-object arises from the resulting temperature gradient. Plasmonic nano-tweezers thus face the challenge of disentangling the intricate contributions of the optical and thermophoretic forces. Here, we show that commonly added surfactants can unexpectedly impact the trap performance by acting on the thermophilic or thermophobic response of the nano-object. Using different surfactants in double nanohole plasmonic trapping experiments, we measure and compare the contributions of the thermophoretic and the optical forces, evidencing a trap stiffness 20× higher using sodium dodecyl sulfate (SDS) as compared to Triton X-100. This work uncovers an important mechanism in plasmonic nano-tweezers and provides guidelines to control and optimize the trap performance for different plasmonic designs.

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Quantifying the Role of the Surfactant and the Thermophoretic Force in Plasmonic Nano-optical Trapping

et al. 2020

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“…Recently, Wenger et al quantified the temperature rise caused by trapped beams focused on single/double gold nanoholes. They found that the temperature gain was largely controlled by ohmic losses of the metal layer, independent of the aperture parameters or laser polarization 313,314 . In the following, many other works also discussed the temperature in nanoholes [315][316][317] .…”

Section: Sensing and Imagingmentioning

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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“…With 𝑅 = 14 nm and ℎ = 15 nm, the 6𝜋𝜂𝑅 term in the drag coefficient is increased by a factor 2.5, which appears similar to what was used in a previous study 7 . For a more accurate measurement, we also take into account the temperature dependence of the water viscosity 𝜂 using the Vogel equation 36 and our previous calibration of the temperature inside DNH structures as a function of the infrared laser power 37,38 .…”

Section: Theorymentioning

confidence: 99%

Plasmonic nano-optical trap stiffness measurements and design optimization

2021

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Adhesion layer influence on controlling the local temperature in plasmonic gold nanoholes

Abstract: The gold adhesion layer can have a dramatic impact on the thermal response of plasmonic structures, offering new ways to promote or avoid the temperature increase in plasmonics.

Cited by 26 publications

References 48 publications

Quantifying the Role of the Surfactant and the Thermophoretic Force in Plasmonic Nano-optical Trapping

Quantifying the Role of the Surfactant and the Thermophoretic Force in Plasmonic Nano-optical Trapping

Plasmonic tweezers: for nanoscale optical trapping and beyond

Plasmonic nano-optical trap stiffness measurements and design optimization

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