System and method for sensing and trapping nanoparticles with plasmonic nanopores

Patent metadata

Field	Value
Publication number	US-10876946-B2
Application number	US-201916717842-A
Country	US
Kind code	B2
Filing date	Dec 17, 2019
Priority date	Mar 31, 2016
Publication date	Dec 29, 2020
Grant date	Dec 29, 2020

Abstract

An apparatus for trapping and sensing nanoparticles using plasmonic nanopores, comprising a conductive transparent layer, a conductive film layer mounted to a substrate, the film layer comprising a plurality of nanopores for trapping nanoparticles contained in a fluid situated between the conductive transparent layer and the conductive film layer, and an electric field source connected between the transparent layer and the film layer.

First claim

The invention claimed is:

1. An apparatus, comprising:
a conductive transparent layer;
a conductive film aperture layer mounted to a substrate, the aperture layer comprising a plurality of nanopores for trapping nanoparticles contained in a fluid situated between the transparent layer and the aperture layer;
a light source configured to illuminate the nanopores to induce a flow of the nanoparticles towards the nanopores; and
an electric field source connected between the transparent layer and the aperture layer, the electric field source comprising an alternating current source.

2. The apparatus of claim 1 , wherein a frequency of the alternating current source is in the range of 5 KHz-100 KHz.

3. The apparatus of claim 1 , wherein the field produced by the electric field source is in the range of 40K-1 M volts per meter.

4. The apparatus of claim 2 , further comprising a metasurface lens which focuses the light source onto the nanopores.

5. The apparatus of claim 4 , wherein a diffraction grating is formed in the transparent layer.

6. The apparatus of claim 1 , wherein the aperture layer comprises gold.

7. The apparatus of claim 1 , wherein the aperture layer indium tin oxide.

8. The apparatus of claim 1 , wherein a nanopore of the plurality of nanopores is surrounded by a bullseye grating to provide concentration of light to the nanopore and outcoupling of light from the nanopore to free space.

9. The apparatus of claim 1 , wherein the aperture layer comprises alternating portions of subwavelength metal and dielectric nanostructures arranged configuration, each of said portions extending through the aperature layer thickness.

10. The apparatus of claim 1 , wherein the light source is a laser.

Assignees

• Purdue Research Foundation

Inventors

• Ndukaife Justus C
• Boltasseva Alexandra
• Nnanna Agbai

Classifications

• G21K1/30

  for confining neutral particles or handling confined neutral particles, e.g. atom traps · CPC title

• G01N15/00 Primary

  Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials · CPC title

• B82Y20/00

  Nanooptics, e.g. quantum optics or photonic crystals · CPC title

• G01N2015/0053

  in liquids, e.g. trouble · CPC title

• B01L3/502761

  specially adapted for handling suspended solids or molecules independently from the bulk fluid flow, e.g. for trapping or sorting beads or physically stretching molecules · CPC title