Optical properties of plasmonic nanopore arrays prepared by electron beam and colloidal lithography

Malekian, Bita; Xiong, Kunli; Kang, Eul Son; Andersson, John; Emilsson, Gustav; Rommel, Marcus; Sannomiya, Takumi; Jonsson, Magnus P.; Dahlin, Andreas

doi:10.1039/c9na00585d

Cited by 12 publications

(11 citation statements)

References 41 publications

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“…As another control, changing hole diameter did not lead to any significant changes in the reflectance spectrum ( Figure S3 ). Thus, the purpose of the nanoholes (in Au or Pt) is to allow transport of Li + ions to the WO 3 as shown by Hopmann et al 11 However, finite difference time domain (FDTD) simulations on a square lattice 29 did suggest plasmonic activity in the near-infrared for the conventional design (see Figure S4 and related discussion).…”

Section: Resultsmentioning

confidence: 99%

Electrochromic Inorganic Nanostructures with High Chromaticity and Superior Brightness

et al. 2021

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The possibility of actively controlling structural colors has recently attracted a lot of attention, in particular for new types of reflective displays (electronic paper). However, it has proven challenging to achieve good image quality in such devices, mainly because many subpixels are necessary and the semitransparent counter electrodes lower the total reflectance. Here we present an inorganic electrochromic nanostructure based on tungsten trioxide, gold, and a thin platinum mirror. The platinum reflector provides a wide color range and makes it possible to “reverse” the device design so that electrolyte and counter electrode can be placed behind the nanostructures with respect to the viewer. Importantly, this makes it possible to maintain high reflectance regardless of how the electrochemical cell is constructed. We show that our nanostructures clearly outperform the latest commercial color e-reader in terms of both color range and brightness.

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Section: Resultsmentioning

confidence: 99%

Electrochromic Inorganic Nanostructures with High Chromaticity and Superior Brightness

et al. 2021

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“…A convenient feature of the dense nanochamber arrays is that they enable excitation of surface plasmons in the thin gold film due to the short-range ordered pattern. 24,26,27 The extinction spectrum exhibits a Fano-shaped resonance 30 (a peak and a dip) in the red or near infrared region and this feature shifts upon changes in the local refractive index (RI) on the surface. This labelfree readout method, typically referred to as "nanoplasmonic sensing", is well established for affinity-based detection.…”

Section: Resultsmentioning

confidence: 99%

Stable Trapping of Multiple Proteins at Physiological Conditions Using Nanoscale Chambers with Macromolecular Gates

Svirelis

Adali-Kaya

Emilsson

et al. 2023

Preprint

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The possibility to detect and analyze single or few biological molecules has proven very important for understanding their function and interaction mechanisms. Ideally, the molecules should be confined to a nanoscale volume so that the observation time can be extended. However, it has proven difficult to develop reliable, non-invasive trapping techniques for biomolecules under physiological conditions. Here we present a new concept for long-term and tether-free trapping of proteins without exposing them to any field gradient forces. We show that a responsive polymer brush can make solid state nanopores switch between a fully open and a fully closed state with respect to proteins, while always allowing the passage of solvent, ions and small molecules (up to ~1 kg/mol). This makes it possible to trap a very high number of proteins (500-1000) inside nanoscale chambers with a volume as small as one attoliter, reaching concentrations up to 60 g/L, which is orders of magnitude higher than for existing container-based technologies. Additionally, our method is fully compatible with parallelization by imaging arrays of nanochambers. As an application example, we show that enzymatic cascade reactions can be performed with multiple native enzymes under full nanoscale confinement and steady supply of reactants. This platform will greatly extend the possibilities of single/few molecule analysis by optical methods, and should be particularly useful for studying protein-protein interactions, such as the dynamics of oligomerization.

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“…Figure 13A describes the process of EBL deposition for long-range nanopore channels: 1) Si 3 N 4 was deposited on the Si membrane; 2) the negative resist was used that the metallic apertures could be formed before etching in order to avoid that the metals exist on the walls in the wafer based on the previous report; 3) nanopore array was formed via ELB; then 4) the metal Au and metallic oxide layer (Al 2 O 3 ) as a protective layer were deposited by conventional electron gun heating before 5) resist lifts-off; then 6) dry etching for nanopore array. [95][96][97] On the other hand, the author proposed a new method, based on the report of Dahlin et al, that was polystyrene colloids assembling on the Si 3 N 4 membrane and then lifting the colloids after depositing Au and Al 2 O 3 layer, as illustrated in Figure 13B. [96,97] By this improved fabrication approach, it could avoid metal residues depositing on the dielectric membrane caused by the imperfect directionality of the nanopores.…”

Section: Hybrid Fabricationmentioning

confidence: 99%

Solid‐State Nanopore Array: Manufacturing and Applications

Liu

Zhou

Wang

et al. 2022

Small

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Optical properties of plasmonic nanopore arrays prepared by electron beam and colloidal lithography

Abstract: We present new plasmonic nanopore arrays and their optical properties, in particular the influence from short-range vs. long-range ordering.

Cited by 12 publications

References 41 publications

Electrochromic Inorganic Nanostructures with High Chromaticity and Superior Brightness

Electrochromic Inorganic Nanostructures with High Chromaticity and Superior Brightness

Stable Trapping of Multiple Proteins at Physiological Conditions Using Nanoscale Chambers with Macromolecular Gates

Solid‐State Nanopore Array: Manufacturing and Applications

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