# US 8,784,663 B2 · Trapping nanostructures

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- Number: US 8,784,663 B2
- Document ID: US8784663B2
- Status: Granted
- Kind: B2
- Application number: 12/622,897
- Filed: 2009-11-20
- Published: 2011-05-26
- Granted: 2014-07-22
- Earliest claimed: 2009-11-20
- Assignees: Nokia Corporation
- Applicants: Di Wei; Zoran Radivojevic; Markku Antti Kyosti Rouvala; Teuvo Tapani Ryhänen
- Inventors: Di Wei; Zoran Radivojevic; Markku Antti Kyosti Rouvala; Teuvo Tapani Ryhänen
- Web page: https://patentgrep.com/patent/US8784663B2

## CPC

- B01D 47/021: {by bubbling the gas through a liquid bath}
- B01D: SEPARATION (separating solids from solids by wet methods B03B, B03D; by pneumatic jigs or tables B03B; by other dry methods B07; magnetic or electrostatic separation of solid materials from solid materials or fluids, separation by high-voltage electric fields B03C; centrifuges, vortex apparatus B04; presses per se for squeezing-out liquid from liquid-containing material B30B9/02; treatment of water C02F, e.g. softening by ion-exchange C02F1/42; {arrangements of air intake cleaners in gas turbine plants F02C7/05} ; arrangements or mounting of filters in air-conditioning, air-humidification or ventilation F24F13/28)

## Abstract

A trap Including: an inlet configured to receive a fluid conveying nanostructures; ionic liquid configured to trap the nanostructures; and an outlet for the fluid.

## Claims

### Claim 1

A method comprising:
receiving a fluid conveying nanostructures, the nanostructures comprising graphene;
trapping the nanostructures using ionic liquid, the ionic liquid comprising a room temperature ionic liquid comprising an ionic salt;
recycling the nanostructures to a source of the nanostructures; and
exhausting the fluid;
wherein the nanostructures are reversibly trapped by π-π electron system interactions.

### Claim 2 (depends on 1)

A method as claimed in claim 1 further comprising recovering trapped nanostructures from the ionic liquid.

### Claim 3 (depends on 1)

A method as claimed in claim 1 further comprising transporting or storing nanostructures as trapped nanostructures within the ionic liquid.

### Claim 4 (depends on 1)

A method as claimed in claim 1, further comprising dispersing the nanostructures within the ionic liquid.

### Claim 5 (depends on 4)

A method as claimed in claim 4, wherein dispersing the nanostructures comprises ultrasonically dispersing the nanostructures.

### Claim 6 (depends on 4)

The method as claimed in claim 4, wherein dispersing the nanostructures comprises chemically dispersing the nanostructures using a dispersing agent or a dispersing additive.

### Claim 7 (depends on 4)

The method as claimed in claim 4, wherein dispersing the nanostructures comprises thermodynamically dispersing the nanostructures using a heater.