# US 11,027,514 B2 · Ultrathin hollow plates and their applications

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- Number: US 11,027,514 B2
- Document ID: US11027514B2
- Status: Granted
- Kind: B2
- Application number: 15/998,451
- Filed: 2018-08-15
- Published: 2019-03-07
- Granted: 2021-06-08
- Earliest claimed: 2017-08-15
- Assignees: The Trustees of the University of Pennsylvania
- Applicants: The Trustees of the University of Pennsylvania
- Inventors: Igor Bargatin; Chen Lin; Samuel Nicaise
- Web page: https://patentgrep.com/patent/US11027514B2

## CPC

- B32B 3/12: characterised by a layer of regularly- arranged cells, e.g. a honeycomb structure
- B32B 3/266: {characterised by an apertured layer, the apertures going through the whole thickness of the layer, e.g. expanded metal, perforated layer, slit layer regular cells B32B3/12}
- B32B 2255/26: Polymeric coating
- B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM

## Abstract

The presently disclosed subject matter relates to nanocardboard structures and methods of fabrication thereof. An exemplary nanocardboard structure includes at least two parallel planar films and webbing. The planar films can be separated from each other by a gap of from about 0.1 micrometers to about 1000 micrometers.

## Claims

### Claim 1

A nanocardboard structure comprising:
at least two parallel planar films separated from each other by a gap of from about 0.1 micrometers to about 1000 micrometers; and
a webbing disposed between the at least two parallel planar films, wherein the at least two parallel planar films comprise perforations that match a cross section of the webbing, wherein the nanocardboard including the webbing is fabricated as a monolithic structure.

### Claim 2 (depends on 1)

The nanocardboard structure of claim 1, wherein the webbing is configured such that any line lying in a plane of one of the at least two parallel planar films intersects the webbing to prevent wrinkling.

### Claim 3 (depends on 1)

The nanocardboard structure of claim 1, wherein the at least two parallel planar films and the webbing are configured to recover the nanocardboard structure from bending deformation without damage.

### Claim 4 (depends on 1)

The nanocardboard structure of claim 1, wherein the webbing forms a basketweave motif.

### Claim 5 (depends on 1)

The nanocardboard structure of claim 1, wherein the webbing comprises a hexagonal array of cylinders.

### Claim 6 (depends on 1)

The nanocardboard structure of claim 1, wherein the nanocardboard structure is electrically insulating or thermally insulating.

### Claim 7 (depends on 1)

The nanocardboard structure of claim 1, wherein the nanocardboard structure is configured as a thermal transpiration membrane.

### Claim 8 (depends on 7)

The nanocardboard structure of claim 7, wherein the thermal transpiration membrane creates an overpressure by generating a temperature difference across the membrane.

### Claim 9 (depends on 8)

The nanocardboard structure of claim 8, wherein the temperature difference is generated by a natural source of energy.

### Claim 10 (depends on 1)

The nanocardboard structure of claim 1, wherein one side of the nanocardboard structure is clamped on a surface to form a cantilever.

### Claim 11 (depends on 10)

The nanocardboard structure of claim 10, wherein the cantilever is configured as a scanning probe for scanning probe microscopy.

### Claim 12 (depends on 1)

The nanocardboard structure of claim 1, wherein the webbing forms a motif that comprises a plurality of parallel channels.

### Claim 13 (depends on 1)

The nanocardboard structure of claim 1, wherein the nanocardboard is coated on at least on side with a polymer layer.

### Claim 14 (depends on 13)

The nanocardboard structure of claim 13, wherein a thickness of the polymer layer ranges from about 10 nm to about 1000 nm.

### Claim 15 (depends on 14)

The nanocardboard structure of claim 14, wherein the polymer thickness is about 500 nm.