Levitated Plasmonic Nanoantennas in an Aqueous Environment

Tuna, Yazgan; Kim, Ji Tae; Liu, Hsuan-Wei; Sandoghdar, Vahid

doi:10.1021/acsnano.7b03310

Cited by 11 publications

(13 citation statements)

References 60 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[1][2][3][4][5][6] Nanoparticles, [7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23] quantum dots, 24,25 proteins, 4,[26][27][28][29] or DNA molecules 30,31 can be trapped, paving the way for applications in biochemistry, [32][33][34] life sciences, [35][36][37] and quantum information processing. [38][39][40][41][42] While the optical gradient force is now well understood, 43 the physics of plasmonic trapping is more complex as optical, thermal and fluidic effects are intrinsically entangled.…”

mentioning

confidence: 99%

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

et al. 2020

View full text Add to dashboard Cite

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.

show abstract

mentioning

confidence: 99%

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

et al. 2020

View full text Add to dashboard Cite

show abstract

“…In a similar fashion, the height occupation probability, which provides a description of the free-energy landscape within a microfludic slit channel, has been demonstrated for fast tracking of diffusing 60 nm GNPs [152]. Geometry-induced electrostatic potentials at the end of a nanopipette have also been used for local manipulation of plasmonic antennas observed by iSCAT [153].…”

Section: Gold Nanoparticlesmentioning

confidence: 99%

Interferometric Scattering (iSCAT) Microscopy and Related Techniques

Taylor

Sandoghdar

2019

Biological and Medical Physics, Biomedical Engineering

Self Cite

View full text Add to dashboard Cite

Interferometric scattering (iSCAT) microscopy is a powerful tool for label-free sensitive detection and imaging of nanoparticles to high spatio-temporal resolution. As it was born out of detection principles central to conventional microscopy, we begin by surveying the historical development of the microscope to examine how the exciting possibility for interferometric scattering microscopy with sensitivities sufficient to observe single molecules has become a reality. We discuss the theory of interferometric detection and also issues relevant to achieving a high detection sensitivity and speed. A showcase of numerous applications and avenues of novel research across various disciplines that iSCAT microscopy has opened up is also presented.1

show abstract

“…To address this challenging issue, we propose hybrid plasmonic nanopillar (HNP) arrays that composed of DNPs capped with gold nanodisks functioning as plasmonic waveguides. The metallic structures make it possible to guide the localized surface plasmon (LSP) phenomenon, leading to amplification of the light intensity and subwavelength localization of electromagnetic energy when coupled to incoming light below the plasma frequency [38][39][40][41][42][43][44][45][46][47][48][49][50]. In fluorescence imaging based on nanotechnology, coupling of the fluorophores and LSP modes of plasmonic nanostructures enhances the fluorescence detection sensitivity and improves the intensity of the plasmoniccoupling-based sensing signal [51][52][53][54].…”

Section: Introductionmentioning

confidence: 99%

3D super-resolved imaging in live cells using sub-diffractive plasmonic localization of hybrid nanopillar arrays

et al. 2020

View full text Add to dashboard Cite

AbstractAnalysing dynamics of a single biomolecule using high-resolution imaging techniques has been had significant attentions to understand complex biological system. Among the many approaches, vertical nanopillar arrays in contact with the inside of cells have been reported as a one of useful imaging applications since an observation volume can be confined down to few-tens nanometre theoretically. However, the nanopillars experimentally are not able to obtain super-resolution imaging because their evanescent waves generate a high optical loss and a low signal-to-noise ratio. Also, conventional nanopillars have a limitation to yield 3D information because they do not concern field localization in z-axis. Here, we developed novel hybrid nanopillar arrays (HNPs) that consist of SiO2 nanopillars terminated with gold nanodisks, allowing extreme light localization. The electromagnetic field profiles of HNPs are obtained through simulations and imaging resolution of cell membrane and biomolecules in living cells are tested using one-photon and 3D multiphoton fluorescence microscopy, respectively. Consequently, HNPs present approximately 25 times enhanced intensity compared to controls and obtained an axial and lateral resolution of 110 and 210 nm of the intensities of fluorophores conjugated with biomolecules transported in living cells. These structures can be a great platform to analyse complex intracellular environment.

show abstract

Levitated Plasmonic Nanoantennas in an Aqueous Environment

Cited by 11 publications

References 60 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

Interferometric Scattering (iSCAT) Microscopy and Related Techniques

3D super-resolved imaging in live cells using sub-diffractive plasmonic localization of hybrid nanopillar arrays

Contact Info

Product

Resources

About